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authorLinus Torvalds <torvalds@linux-foundation.org>2010-02-22 16:42:18 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-02-22 22:29:41 (GMT)
commit81b50f3ce40bfdd66e5d967bf82be001039a9a98 (patch)
tree7e86bb81e83c9fad73dcbdaa0ef33038137b4274 /builtin-apply.c
parent241b9254e1c8ff071d8054f8b6fbe1883b389d69 (diff)
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Move 'builtin-*' into a 'builtin/' subdirectory
This shrinks the top-level directory a bit, and makes it much more pleasant to use auto-completion on the thing. Instead of [torvalds@nehalem git]$ em buil<tab> Display all 180 possibilities? (y or n) [torvalds@nehalem git]$ em builtin-sh builtin-shortlog.c builtin-show-branch.c builtin-show-ref.c builtin-shortlog.o builtin-show-branch.o builtin-show-ref.o [torvalds@nehalem git]$ em builtin-shor<tab> builtin-shortlog.c builtin-shortlog.o [torvalds@nehalem git]$ em builtin-shortlog.c you get [torvalds@nehalem git]$ em buil<tab> [type] builtin/ builtin.h [torvalds@nehalem git]$ em builtin [auto-completes to] [torvalds@nehalem git]$ em builtin/sh<tab> [type] shortlog.c shortlog.o show-branch.c show-branch.o show-ref.c show-ref.o [torvalds@nehalem git]$ em builtin/sho [auto-completes to] [torvalds@nehalem git]$ em builtin/shor<tab> [type] shortlog.c shortlog.o [torvalds@nehalem git]$ em builtin/shortlog.c which doesn't seem all that different, but not having that annoying break in "Display all 180 possibilities?" is quite a relief. NOTE! If you do this in a clean tree (no object files etc), or using an editor that has auto-completion rules that ignores '*.o' files, you won't see that annoying 'Display all 180 possibilities?' message - it will just show the choices instead. I think bash has some cut-off around 100 choices or something. So the reason I see this is that I'm using an odd editory, and thus don't have the rules to cut down on auto-completion. But you can simulate that by using 'ls' instead, or something similar. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin-apply.c')
-rw-r--r--builtin-apply.c3670
1 files changed, 0 insertions, 3670 deletions
diff --git a/builtin-apply.c b/builtin-apply.c
deleted file mode 100644
index 3af4ae0..0000000
--- a/builtin-apply.c
+++ /dev/null
@@ -1,3670 +0,0 @@
-/*
- * apply.c
- *
- * Copyright (C) Linus Torvalds, 2005
- *
- * This applies patches on top of some (arbitrary) version of the SCM.
- *
- */
-#include "cache.h"
-#include "cache-tree.h"
-#include "quote.h"
-#include "blob.h"
-#include "delta.h"
-#include "builtin.h"
-#include "string-list.h"
-#include "dir.h"
-#include "parse-options.h"
-
-/*
- * --check turns on checking that the working tree matches the
- * files that are being modified, but doesn't apply the patch
- * --stat does just a diffstat, and doesn't actually apply
- * --numstat does numeric diffstat, and doesn't actually apply
- * --index-info shows the old and new index info for paths if available.
- * --index updates the cache as well.
- * --cached updates only the cache without ever touching the working tree.
- */
-static const char *prefix;
-static int prefix_length = -1;
-static int newfd = -1;
-
-static int unidiff_zero;
-static int p_value = 1;
-static int p_value_known;
-static int check_index;
-static int update_index;
-static int cached;
-static int diffstat;
-static int numstat;
-static int summary;
-static int check;
-static int apply = 1;
-static int apply_in_reverse;
-static int apply_with_reject;
-static int apply_verbosely;
-static int no_add;
-static const char *fake_ancestor;
-static int line_termination = '\n';
-static unsigned int p_context = UINT_MAX;
-static const char * const apply_usage[] = {
- "git apply [options] [<patch>...]",
- NULL
-};
-
-static enum ws_error_action {
- nowarn_ws_error,
- warn_on_ws_error,
- die_on_ws_error,
- correct_ws_error,
-} ws_error_action = warn_on_ws_error;
-static int whitespace_error;
-static int squelch_whitespace_errors = 5;
-static int applied_after_fixing_ws;
-
-static enum ws_ignore {
- ignore_ws_none,
- ignore_ws_change,
-} ws_ignore_action = ignore_ws_none;
-
-
-static const char *patch_input_file;
-static const char *root;
-static int root_len;
-static int read_stdin = 1;
-static int options;
-
-static void parse_whitespace_option(const char *option)
-{
- if (!option) {
- ws_error_action = warn_on_ws_error;
- return;
- }
- if (!strcmp(option, "warn")) {
- ws_error_action = warn_on_ws_error;
- return;
- }
- if (!strcmp(option, "nowarn")) {
- ws_error_action = nowarn_ws_error;
- return;
- }
- if (!strcmp(option, "error")) {
- ws_error_action = die_on_ws_error;
- return;
- }
- if (!strcmp(option, "error-all")) {
- ws_error_action = die_on_ws_error;
- squelch_whitespace_errors = 0;
- return;
- }
- if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
- ws_error_action = correct_ws_error;
- return;
- }
- die("unrecognized whitespace option '%s'", option);
-}
-
-static void parse_ignorewhitespace_option(const char *option)
-{
- if (!option || !strcmp(option, "no") ||
- !strcmp(option, "false") || !strcmp(option, "never") ||
- !strcmp(option, "none")) {
- ws_ignore_action = ignore_ws_none;
- return;
- }
- if (!strcmp(option, "change")) {
- ws_ignore_action = ignore_ws_change;
- return;
- }
- die("unrecognized whitespace ignore option '%s'", option);
-}
-
-static void set_default_whitespace_mode(const char *whitespace_option)
-{
- if (!whitespace_option && !apply_default_whitespace)
- ws_error_action = (apply ? warn_on_ws_error : nowarn_ws_error);
-}
-
-/*
- * For "diff-stat" like behaviour, we keep track of the biggest change
- * we've seen, and the longest filename. That allows us to do simple
- * scaling.
- */
-static int max_change, max_len;
-
-/*
- * Various "current state", notably line numbers and what
- * file (and how) we're patching right now.. The "is_xxxx"
- * things are flags, where -1 means "don't know yet".
- */
-static int linenr = 1;
-
-/*
- * This represents one "hunk" from a patch, starting with
- * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
- * patch text is pointed at by patch, and its byte length
- * is stored in size. leading and trailing are the number
- * of context lines.
- */
-struct fragment {
- unsigned long leading, trailing;
- unsigned long oldpos, oldlines;
- unsigned long newpos, newlines;
- const char *patch;
- int size;
- int rejected;
- int linenr;
- struct fragment *next;
-};
-
-/*
- * When dealing with a binary patch, we reuse "leading" field
- * to store the type of the binary hunk, either deflated "delta"
- * or deflated "literal".
- */
-#define binary_patch_method leading
-#define BINARY_DELTA_DEFLATED 1
-#define BINARY_LITERAL_DEFLATED 2
-
-/*
- * This represents a "patch" to a file, both metainfo changes
- * such as creation/deletion, filemode and content changes represented
- * as a series of fragments.
- */
-struct patch {
- char *new_name, *old_name, *def_name;
- unsigned int old_mode, new_mode;
- int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
- int rejected;
- unsigned ws_rule;
- unsigned long deflate_origlen;
- int lines_added, lines_deleted;
- int score;
- unsigned int is_toplevel_relative:1;
- unsigned int inaccurate_eof:1;
- unsigned int is_binary:1;
- unsigned int is_copy:1;
- unsigned int is_rename:1;
- unsigned int recount:1;
- struct fragment *fragments;
- char *result;
- size_t resultsize;
- char old_sha1_prefix[41];
- char new_sha1_prefix[41];
- struct patch *next;
-};
-
-/*
- * A line in a file, len-bytes long (includes the terminating LF,
- * except for an incomplete line at the end if the file ends with
- * one), and its contents hashes to 'hash'.
- */
-struct line {
- size_t len;
- unsigned hash : 24;
- unsigned flag : 8;
-#define LINE_COMMON 1
-};
-
-/*
- * This represents a "file", which is an array of "lines".
- */
-struct image {
- char *buf;
- size_t len;
- size_t nr;
- size_t alloc;
- struct line *line_allocated;
- struct line *line;
-};
-
-/*
- * Records filenames that have been touched, in order to handle
- * the case where more than one patches touch the same file.
- */
-
-static struct string_list fn_table;
-
-static uint32_t hash_line(const char *cp, size_t len)
-{
- size_t i;
- uint32_t h;
- for (i = 0, h = 0; i < len; i++) {
- if (!isspace(cp[i])) {
- h = h * 3 + (cp[i] & 0xff);
- }
- }
- return h;
-}
-
-/*
- * Compare lines s1 of length n1 and s2 of length n2, ignoring
- * whitespace difference. Returns 1 if they match, 0 otherwise
- */
-static int fuzzy_matchlines(const char *s1, size_t n1,
- const char *s2, size_t n2)
-{
- const char *last1 = s1 + n1 - 1;
- const char *last2 = s2 + n2 - 1;
- int result = 0;
-
- if (n1 < 0 || n2 < 0)
- return 0;
-
- /* ignore line endings */
- while ((*last1 == '\r') || (*last1 == '\n'))
- last1--;
- while ((*last2 == '\r') || (*last2 == '\n'))
- last2--;
-
- /* skip leading whitespace */
- while (isspace(*s1) && (s1 <= last1))
- s1++;
- while (isspace(*s2) && (s2 <= last2))
- s2++;
- /* early return if both lines are empty */
- if ((s1 > last1) && (s2 > last2))
- return 1;
- while (!result) {
- result = *s1++ - *s2++;
- /*
- * Skip whitespace inside. We check for whitespace on
- * both buffers because we don't want "a b" to match
- * "ab"
- */
- if (isspace(*s1) && isspace(*s2)) {
- while (isspace(*s1) && s1 <= last1)
- s1++;
- while (isspace(*s2) && s2 <= last2)
- s2++;
- }
- /*
- * If we reached the end on one side only,
- * lines don't match
- */
- if (
- ((s2 > last2) && (s1 <= last1)) ||
- ((s1 > last1) && (s2 <= last2)))
- return 0;
- if ((s1 > last1) && (s2 > last2))
- break;
- }
-
- return !result;
-}
-
-static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
-{
- ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
- img->line_allocated[img->nr].len = len;
- img->line_allocated[img->nr].hash = hash_line(bol, len);
- img->line_allocated[img->nr].flag = flag;
- img->nr++;
-}
-
-static void prepare_image(struct image *image, char *buf, size_t len,
- int prepare_linetable)
-{
- const char *cp, *ep;
-
- memset(image, 0, sizeof(*image));
- image->buf = buf;
- image->len = len;
-
- if (!prepare_linetable)
- return;
-
- ep = image->buf + image->len;
- cp = image->buf;
- while (cp < ep) {
- const char *next;
- for (next = cp; next < ep && *next != '\n'; next++)
- ;
- if (next < ep)
- next++;
- add_line_info(image, cp, next - cp, 0);
- cp = next;
- }
- image->line = image->line_allocated;
-}
-
-static void clear_image(struct image *image)
-{
- free(image->buf);
- image->buf = NULL;
- image->len = 0;
-}
-
-static void say_patch_name(FILE *output, const char *pre,
- struct patch *patch, const char *post)
-{
- fputs(pre, output);
- if (patch->old_name && patch->new_name &&
- strcmp(patch->old_name, patch->new_name)) {
- quote_c_style(patch->old_name, NULL, output, 0);
- fputs(" => ", output);
- quote_c_style(patch->new_name, NULL, output, 0);
- } else {
- const char *n = patch->new_name;
- if (!n)
- n = patch->old_name;
- quote_c_style(n, NULL, output, 0);
- }
- fputs(post, output);
-}
-
-#define CHUNKSIZE (8192)
-#define SLOP (16)
-
-static void read_patch_file(struct strbuf *sb, int fd)
-{
- if (strbuf_read(sb, fd, 0) < 0)
- die_errno("git apply: failed to read");
-
- /*
- * Make sure that we have some slop in the buffer
- * so that we can do speculative "memcmp" etc, and
- * see to it that it is NUL-filled.
- */
- strbuf_grow(sb, SLOP);
- memset(sb->buf + sb->len, 0, SLOP);
-}
-
-static unsigned long linelen(const char *buffer, unsigned long size)
-{
- unsigned long len = 0;
- while (size--) {
- len++;
- if (*buffer++ == '\n')
- break;
- }
- return len;
-}
-
-static int is_dev_null(const char *str)
-{
- return !memcmp("/dev/null", str, 9) && isspace(str[9]);
-}
-
-#define TERM_SPACE 1
-#define TERM_TAB 2
-
-static int name_terminate(const char *name, int namelen, int c, int terminate)
-{
- if (c == ' ' && !(terminate & TERM_SPACE))
- return 0;
- if (c == '\t' && !(terminate & TERM_TAB))
- return 0;
-
- return 1;
-}
-
-/* remove double slashes to make --index work with such filenames */
-static char *squash_slash(char *name)
-{
- int i = 0, j = 0;
-
- if (!name)
- return NULL;
-
- while (name[i]) {
- if ((name[j++] = name[i++]) == '/')
- while (name[i] == '/')
- i++;
- }
- name[j] = '\0';
- return name;
-}
-
-static char *find_name(const char *line, char *def, int p_value, int terminate)
-{
- int len;
- const char *start = NULL;
-
- if (p_value == 0)
- start = line;
-
- if (*line == '"') {
- struct strbuf name = STRBUF_INIT;
-
- /*
- * Proposed "new-style" GNU patch/diff format; see
- * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
- */
- if (!unquote_c_style(&name, line, NULL)) {
- char *cp;
-
- for (cp = name.buf; p_value; p_value--) {
- cp = strchr(cp, '/');
- if (!cp)
- break;
- cp++;
- }
- if (cp) {
- /* name can later be freed, so we need
- * to memmove, not just return cp
- */
- strbuf_remove(&name, 0, cp - name.buf);
- free(def);
- if (root)
- strbuf_insert(&name, 0, root, root_len);
- return squash_slash(strbuf_detach(&name, NULL));
- }
- }
- strbuf_release(&name);
- }
-
- for (;;) {
- char c = *line;
-
- if (isspace(c)) {
- if (c == '\n')
- break;
- if (name_terminate(start, line-start, c, terminate))
- break;
- }
- line++;
- if (c == '/' && !--p_value)
- start = line;
- }
- if (!start)
- return squash_slash(def);
- len = line - start;
- if (!len)
- return squash_slash(def);
-
- /*
- * Generally we prefer the shorter name, especially
- * if the other one is just a variation of that with
- * something else tacked on to the end (ie "file.orig"
- * or "file~").
- */
- if (def) {
- int deflen = strlen(def);
- if (deflen < len && !strncmp(start, def, deflen))
- return squash_slash(def);
- free(def);
- }
-
- if (root) {
- char *ret = xmalloc(root_len + len + 1);
- strcpy(ret, root);
- memcpy(ret + root_len, start, len);
- ret[root_len + len] = '\0';
- return squash_slash(ret);
- }
-
- return squash_slash(xmemdupz(start, len));
-}
-
-static int count_slashes(const char *cp)
-{
- int cnt = 0;
- char ch;
-
- while ((ch = *cp++))
- if (ch == '/')
- cnt++;
- return cnt;
-}
-
-/*
- * Given the string after "--- " or "+++ ", guess the appropriate
- * p_value for the given patch.
- */
-static int guess_p_value(const char *nameline)
-{
- char *name, *cp;
- int val = -1;
-
- if (is_dev_null(nameline))
- return -1;
- name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB);
- if (!name)
- return -1;
- cp = strchr(name, '/');
- if (!cp)
- val = 0;
- else if (prefix) {
- /*
- * Does it begin with "a/$our-prefix" and such? Then this is
- * very likely to apply to our directory.
- */
- if (!strncmp(name, prefix, prefix_length))
- val = count_slashes(prefix);
- else {
- cp++;
- if (!strncmp(cp, prefix, prefix_length))
- val = count_slashes(prefix) + 1;
- }
- }
- free(name);
- return val;
-}
-
-/*
- * Does the ---/+++ line has the POSIX timestamp after the last HT?
- * GNU diff puts epoch there to signal a creation/deletion event. Is
- * this such a timestamp?
- */
-static int has_epoch_timestamp(const char *nameline)
-{
- /*
- * We are only interested in epoch timestamp; any non-zero
- * fraction cannot be one, hence "(\.0+)?" in the regexp below.
- * For the same reason, the date must be either 1969-12-31 or
- * 1970-01-01, and the seconds part must be "00".
- */
- const char stamp_regexp[] =
- "^(1969-12-31|1970-01-01)"
- " "
- "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?"
- " "
- "([-+][0-2][0-9][0-5][0-9])\n";
- const char *timestamp = NULL, *cp;
- static regex_t *stamp;
- regmatch_t m[10];
- int zoneoffset;
- int hourminute;
- int status;
-
- for (cp = nameline; *cp != '\n'; cp++) {
- if (*cp == '\t')
- timestamp = cp + 1;
- }
- if (!timestamp)
- return 0;
- if (!stamp) {
- stamp = xmalloc(sizeof(*stamp));
- if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) {
- warning("Cannot prepare timestamp regexp %s",
- stamp_regexp);
- return 0;
- }
- }
-
- status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0);
- if (status) {
- if (status != REG_NOMATCH)
- warning("regexec returned %d for input: %s",
- status, timestamp);
- return 0;
- }
-
- zoneoffset = strtol(timestamp + m[3].rm_so + 1, NULL, 10);
- zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100);
- if (timestamp[m[3].rm_so] == '-')
- zoneoffset = -zoneoffset;
-
- /*
- * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
- * (west of GMT) or 1970-01-01 (east of GMT)
- */
- if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) ||
- (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10)))
- return 0;
-
- hourminute = (strtol(timestamp + 11, NULL, 10) * 60 +
- strtol(timestamp + 14, NULL, 10) -
- zoneoffset);
-
- return ((zoneoffset < 0 && hourminute == 1440) ||
- (0 <= zoneoffset && !hourminute));
-}
-
-/*
- * Get the name etc info from the ---/+++ lines of a traditional patch header
- *
- * FIXME! The end-of-filename heuristics are kind of screwy. For existing
- * files, we can happily check the index for a match, but for creating a
- * new file we should try to match whatever "patch" does. I have no idea.
- */
-static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
-{
- char *name;
-
- first += 4; /* skip "--- " */
- second += 4; /* skip "+++ " */
- if (!p_value_known) {
- int p, q;
- p = guess_p_value(first);
- q = guess_p_value(second);
- if (p < 0) p = q;
- if (0 <= p && p == q) {
- p_value = p;
- p_value_known = 1;
- }
- }
- if (is_dev_null(first)) {
- patch->is_new = 1;
- patch->is_delete = 0;
- name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
- patch->new_name = name;
- } else if (is_dev_null(second)) {
- patch->is_new = 0;
- patch->is_delete = 1;
- name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
- patch->old_name = name;
- } else {
- name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
- name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
- if (has_epoch_timestamp(first)) {
- patch->is_new = 1;
- patch->is_delete = 0;
- patch->new_name = name;
- } else if (has_epoch_timestamp(second)) {
- patch->is_new = 0;
- patch->is_delete = 1;
- patch->old_name = name;
- } else {
- patch->old_name = patch->new_name = name;
- }
- }
- if (!name)
- die("unable to find filename in patch at line %d", linenr);
-}
-
-static int gitdiff_hdrend(const char *line, struct patch *patch)
-{
- return -1;
-}
-
-/*
- * We're anal about diff header consistency, to make
- * sure that we don't end up having strange ambiguous
- * patches floating around.
- *
- * As a result, gitdiff_{old|new}name() will check
- * their names against any previous information, just
- * to make sure..
- */
-static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
-{
- if (!orig_name && !isnull)
- return find_name(line, NULL, p_value, TERM_TAB);
-
- if (orig_name) {
- int len;
- const char *name;
- char *another;
- name = orig_name;
- len = strlen(name);
- if (isnull)
- die("git apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
- another = find_name(line, NULL, p_value, TERM_TAB);
- if (!another || memcmp(another, name, len + 1))
- die("git apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
- free(another);
- return orig_name;
- }
- else {
- /* expect "/dev/null" */
- if (memcmp("/dev/null", line, 9) || line[9] != '\n')
- die("git apply: bad git-diff - expected /dev/null on line %d", linenr);
- return NULL;
- }
-}
-
-static int gitdiff_oldname(const char *line, struct patch *patch)
-{
- patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
- return 0;
-}
-
-static int gitdiff_newname(const char *line, struct patch *patch)
-{
- patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
- return 0;
-}
-
-static int gitdiff_oldmode(const char *line, struct patch *patch)
-{
- patch->old_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_newmode(const char *line, struct patch *patch)
-{
- patch->new_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_delete(const char *line, struct patch *patch)
-{
- patch->is_delete = 1;
- patch->old_name = patch->def_name;
- return gitdiff_oldmode(line, patch);
-}
-
-static int gitdiff_newfile(const char *line, struct patch *patch)
-{
- patch->is_new = 1;
- patch->new_name = patch->def_name;
- return gitdiff_newmode(line, patch);
-}
-
-static int gitdiff_copysrc(const char *line, struct patch *patch)
-{
- patch->is_copy = 1;
- patch->old_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_copydst(const char *line, struct patch *patch)
-{
- patch->is_copy = 1;
- patch->new_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_renamesrc(const char *line, struct patch *patch)
-{
- patch->is_rename = 1;
- patch->old_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_renamedst(const char *line, struct patch *patch)
-{
- patch->is_rename = 1;
- patch->new_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_similarity(const char *line, struct patch *patch)
-{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
- return 0;
-}
-
-static int gitdiff_dissimilarity(const char *line, struct patch *patch)
-{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
- return 0;
-}
-
-static int gitdiff_index(const char *line, struct patch *patch)
-{
- /*
- * index line is N hexadecimal, "..", N hexadecimal,
- * and optional space with octal mode.
- */
- const char *ptr, *eol;
- int len;
-
- ptr = strchr(line, '.');
- if (!ptr || ptr[1] != '.' || 40 < ptr - line)
- return 0;
- len = ptr - line;
- memcpy(patch->old_sha1_prefix, line, len);
- patch->old_sha1_prefix[len] = 0;
-
- line = ptr + 2;
- ptr = strchr(line, ' ');
- eol = strchr(line, '\n');
-
- if (!ptr || eol < ptr)
- ptr = eol;
- len = ptr - line;
-
- if (40 < len)
- return 0;
- memcpy(patch->new_sha1_prefix, line, len);
- patch->new_sha1_prefix[len] = 0;
- if (*ptr == ' ')
- patch->old_mode = strtoul(ptr+1, NULL, 8);
- return 0;
-}
-
-/*
- * This is normal for a diff that doesn't change anything: we'll fall through
- * into the next diff. Tell the parser to break out.
- */
-static int gitdiff_unrecognized(const char *line, struct patch *patch)
-{
- return -1;
-}
-
-static const char *stop_at_slash(const char *line, int llen)
-{
- int nslash = p_value;
- int i;
-
- for (i = 0; i < llen; i++) {
- int ch = line[i];
- if (ch == '/' && --nslash <= 0)
- return &line[i];
- }
- return NULL;
-}
-
-/*
- * This is to extract the same name that appears on "diff --git"
- * line. We do not find and return anything if it is a rename
- * patch, and it is OK because we will find the name elsewhere.
- * We need to reliably find name only when it is mode-change only,
- * creation or deletion of an empty file. In any of these cases,
- * both sides are the same name under a/ and b/ respectively.
- */
-static char *git_header_name(char *line, int llen)
-{
- const char *name;
- const char *second = NULL;
- size_t len;
-
- line += strlen("diff --git ");
- llen -= strlen("diff --git ");
-
- if (*line == '"') {
- const char *cp;
- struct strbuf first = STRBUF_INIT;
- struct strbuf sp = STRBUF_INIT;
-
- if (unquote_c_style(&first, line, &second))
- goto free_and_fail1;
-
- /* advance to the first slash */
- cp = stop_at_slash(first.buf, first.len);
- /* we do not accept absolute paths */
- if (!cp || cp == first.buf)
- goto free_and_fail1;
- strbuf_remove(&first, 0, cp + 1 - first.buf);
-
- /*
- * second points at one past closing dq of name.
- * find the second name.
- */
- while ((second < line + llen) && isspace(*second))
- second++;
-
- if (line + llen <= second)
- goto free_and_fail1;
- if (*second == '"') {
- if (unquote_c_style(&sp, second, NULL))
- goto free_and_fail1;
- cp = stop_at_slash(sp.buf, sp.len);
- if (!cp || cp == sp.buf)
- goto free_and_fail1;
- /* They must match, otherwise ignore */
- if (strcmp(cp + 1, first.buf))
- goto free_and_fail1;
- strbuf_release(&sp);
- return strbuf_detach(&first, NULL);
- }
-
- /* unquoted second */
- cp = stop_at_slash(second, line + llen - second);
- if (!cp || cp == second)
- goto free_and_fail1;
- cp++;
- if (line + llen - cp != first.len + 1 ||
- memcmp(first.buf, cp, first.len))
- goto free_and_fail1;
- return strbuf_detach(&first, NULL);
-
- free_and_fail1:
- strbuf_release(&first);
- strbuf_release(&sp);
- return NULL;
- }
-
- /* unquoted first name */
- name = stop_at_slash(line, llen);
- if (!name || name == line)
- return NULL;
- name++;
-
- /*
- * since the first name is unquoted, a dq if exists must be
- * the beginning of the second name.
- */
- for (second = name; second < line + llen; second++) {
- if (*second == '"') {
- struct strbuf sp = STRBUF_INIT;
- const char *np;
-
- if (unquote_c_style(&sp, second, NULL))
- goto free_and_fail2;
-
- np = stop_at_slash(sp.buf, sp.len);
- if (!np || np == sp.buf)
- goto free_and_fail2;
- np++;
-
- len = sp.buf + sp.len - np;
- if (len < second - name &&
- !strncmp(np, name, len) &&
- isspace(name[len])) {
- /* Good */
- strbuf_remove(&sp, 0, np - sp.buf);
- return strbuf_detach(&sp, NULL);
- }
-
- free_and_fail2:
- strbuf_release(&sp);
- return NULL;
- }
- }
-
- /*
- * Accept a name only if it shows up twice, exactly the same
- * form.
- */
- for (len = 0 ; ; len++) {
- switch (name[len]) {
- default:
- continue;
- case '\n':
- return NULL;
- case '\t': case ' ':
- second = name+len;
- for (;;) {
- char c = *second++;
- if (c == '\n')
- return NULL;
- if (c == '/')
- break;
- }
- if (second[len] == '\n' && !memcmp(name, second, len)) {
- return xmemdupz(name, len);
- }
- }
- }
-}
-
-/* Verify that we recognize the lines following a git header */
-static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
-{
- unsigned long offset;
-
- /* A git diff has explicit new/delete information, so we don't guess */
- patch->is_new = 0;
- patch->is_delete = 0;
-
- /*
- * Some things may not have the old name in the
- * rest of the headers anywhere (pure mode changes,
- * or removing or adding empty files), so we get
- * the default name from the header.
- */
- patch->def_name = git_header_name(line, len);
- if (patch->def_name && root) {
- char *s = xmalloc(root_len + strlen(patch->def_name) + 1);
- strcpy(s, root);
- strcpy(s + root_len, patch->def_name);
- free(patch->def_name);
- patch->def_name = s;
- }
-
- line += len;
- size -= len;
- linenr++;
- for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
- static const struct opentry {
- const char *str;
- int (*fn)(const char *, struct patch *);
- } optable[] = {
- { "@@ -", gitdiff_hdrend },
- { "--- ", gitdiff_oldname },
- { "+++ ", gitdiff_newname },
- { "old mode ", gitdiff_oldmode },
- { "new mode ", gitdiff_newmode },
- { "deleted file mode ", gitdiff_delete },
- { "new file mode ", gitdiff_newfile },
- { "copy from ", gitdiff_copysrc },
- { "copy to ", gitdiff_copydst },
- { "rename old ", gitdiff_renamesrc },
- { "rename new ", gitdiff_renamedst },
- { "rename from ", gitdiff_renamesrc },
- { "rename to ", gitdiff_renamedst },
- { "similarity index ", gitdiff_similarity },
- { "dissimilarity index ", gitdiff_dissimilarity },
- { "index ", gitdiff_index },
- { "", gitdiff_unrecognized },
- };
- int i;
-
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- break;
- for (i = 0; i < ARRAY_SIZE(optable); i++) {
- const struct opentry *p = optable + i;
- int oplen = strlen(p->str);
- if (len < oplen || memcmp(p->str, line, oplen))
- continue;
- if (p->fn(line + oplen, patch) < 0)
- return offset;
- break;
- }
- }
-
- return offset;
-}
-
-static int parse_num(const char *line, unsigned long *p)
-{
- char *ptr;
-
- if (!isdigit(*line))
- return 0;
- *p = strtoul(line, &ptr, 10);
- return ptr - line;
-}
-
-static int parse_range(const char *line, int len, int offset, const char *expect,
- unsigned long *p1, unsigned long *p2)
-{
- int digits, ex;
-
- if (offset < 0 || offset >= len)
- return -1;
- line += offset;
- len -= offset;
-
- digits = parse_num(line, p1);
- if (!digits)
- return -1;
-
- offset += digits;
- line += digits;
- len -= digits;
-
- *p2 = 1;
- if (*line == ',') {
- digits = parse_num(line+1, p2);
- if (!digits)
- return -1;
-
- offset += digits+1;
- line += digits+1;
- len -= digits+1;
- }
-
- ex = strlen(expect);
- if (ex > len)
- return -1;
- if (memcmp(line, expect, ex))
- return -1;
-
- return offset + ex;
-}
-
-static void recount_diff(char *line, int size, struct fragment *fragment)
-{
- int oldlines = 0, newlines = 0, ret = 0;
-
- if (size < 1) {
- warning("recount: ignore empty hunk");
- return;
- }
-
- for (;;) {
- int len = linelen(line, size);
- size -= len;
- line += len;
-
- if (size < 1)
- break;
-
- switch (*line) {
- case ' ': case '\n':
- newlines++;
- /* fall through */
- case '-':
- oldlines++;
- continue;
- case '+':
- newlines++;
- continue;
- case '\\':
- continue;
- case '@':
- ret = size < 3 || prefixcmp(line, "@@ ");
- break;
- case 'd':
- ret = size < 5 || prefixcmp(line, "diff ");
- break;
- default:
- ret = -1;
- break;
- }
- if (ret) {
- warning("recount: unexpected line: %.*s",
- (int)linelen(line, size), line);
- return;
- }
- break;
- }
- fragment->oldlines = oldlines;
- fragment->newlines = newlines;
-}
-
-/*
- * Parse a unified diff fragment header of the
- * form "@@ -a,b +c,d @@"
- */
-static int parse_fragment_header(char *line, int len, struct fragment *fragment)
-{
- int offset;
-
- if (!len || line[len-1] != '\n')
- return -1;
-
- /* Figure out the number of lines in a fragment */
- offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
- offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
-
- return offset;
-}
-
-static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
-{
- unsigned long offset, len;
-
- patch->is_toplevel_relative = 0;
- patch->is_rename = patch->is_copy = 0;
- patch->is_new = patch->is_delete = -1;
- patch->old_mode = patch->new_mode = 0;
- patch->old_name = patch->new_name = NULL;
- for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
- unsigned long nextlen;
-
- len = linelen(line, size);
- if (!len)
- break;
-
- /* Testing this early allows us to take a few shortcuts.. */
- if (len < 6)
- continue;
-
- /*
- * Make sure we don't find any unconnected patch fragments.
- * That's a sign that we didn't find a header, and that a
- * patch has become corrupted/broken up.
- */
- if (!memcmp("@@ -", line, 4)) {
- struct fragment dummy;
- if (parse_fragment_header(line, len, &dummy) < 0)
- continue;
- die("patch fragment without header at line %d: %.*s",
- linenr, (int)len-1, line);
- }
-
- if (size < len + 6)
- break;
-
- /*
- * Git patch? It might not have a real patch, just a rename
- * or mode change, so we handle that specially
- */
- if (!memcmp("diff --git ", line, 11)) {
- int git_hdr_len = parse_git_header(line, len, size, patch);
- if (git_hdr_len <= len)
- continue;
- if (!patch->old_name && !patch->new_name) {
- if (!patch->def_name)
- die("git diff header lacks filename information when removing "
- "%d leading pathname components (line %d)" , p_value, linenr);
- patch->old_name = patch->new_name = patch->def_name;
- }
- patch->is_toplevel_relative = 1;
- *hdrsize = git_hdr_len;
- return offset;
- }
-
- /* --- followed by +++ ? */
- if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
- continue;
-
- /*
- * We only accept unified patches, so we want it to
- * at least have "@@ -a,b +c,d @@\n", which is 14 chars
- * minimum ("@@ -0,0 +1 @@\n" is the shortest).
- */
- nextlen = linelen(line + len, size - len);
- if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
- continue;
-
- /* Ok, we'll consider it a patch */
- parse_traditional_patch(line, line+len, patch);
- *hdrsize = len + nextlen;
- linenr += 2;
- return offset;
- }
- return -1;
-}
-
-static void record_ws_error(unsigned result, const char *line, int len, int linenr)
-{
- char *err;
-
- if (!result)
- return;
-
- whitespace_error++;
- if (squelch_whitespace_errors &&
- squelch_whitespace_errors < whitespace_error)
- return;
-
- err = whitespace_error_string(result);
- fprintf(stderr, "%s:%d: %s.\n%.*s\n",
- patch_input_file, linenr, err, len, line);
- free(err);
-}
-
-static void check_whitespace(const char *line, int len, unsigned ws_rule)
-{
- unsigned result = ws_check(line + 1, len - 1, ws_rule);
-
- record_ws_error(result, line + 1, len - 2, linenr);
-}
-
-/*
- * Parse a unified diff. Note that this really needs to parse each
- * fragment separately, since the only way to know the difference
- * between a "---" that is part of a patch, and a "---" that starts
- * the next patch is to look at the line counts..
- */
-static int parse_fragment(char *line, unsigned long size,
- struct patch *patch, struct fragment *fragment)
-{
- int added, deleted;
- int len = linelen(line, size), offset;
- unsigned long oldlines, newlines;
- unsigned long leading, trailing;
-
- offset = parse_fragment_header(line, len, fragment);
- if (offset < 0)
- return -1;
- if (offset > 0 && patch->recount)
- recount_diff(line + offset, size - offset, fragment);
- oldlines = fragment->oldlines;
- newlines = fragment->newlines;
- leading = 0;
- trailing = 0;
-
- /* Parse the thing.. */
- line += len;
- size -= len;
- linenr++;
- added = deleted = 0;
- for (offset = len;
- 0 < size;
- offset += len, size -= len, line += len, linenr++) {
- if (!oldlines && !newlines)
- break;
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- return -1;
- switch (*line) {
- default:
- return -1;
- case '\n': /* newer GNU diff, an empty context line */
- case ' ':
- oldlines--;
- newlines--;
- if (!deleted && !added)
- leading++;
- trailing++;
- break;
- case '-':
- if (apply_in_reverse &&
- ws_error_action != nowarn_ws_error)
- check_whitespace(line, len, patch->ws_rule);
- deleted++;
- oldlines--;
- trailing = 0;
- break;
- case '+':
- if (!apply_in_reverse &&
- ws_error_action != nowarn_ws_error)
- check_whitespace(line, len, patch->ws_rule);
- added++;
- newlines--;
- trailing = 0;
- break;
-
- /*
- * We allow "\ No newline at end of file". Depending
- * on locale settings when the patch was produced we
- * don't know what this line looks like. The only
- * thing we do know is that it begins with "\ ".
- * Checking for 12 is just for sanity check -- any
- * l10n of "\ No newline..." is at least that long.
- */
- case '\\':
- if (len < 12 || memcmp(line, "\\ ", 2))
- return -1;
- break;
- }
- }
- if (oldlines || newlines)
- return -1;
- fragment->leading = leading;
- fragment->trailing = trailing;
-
- /*
- * If a fragment ends with an incomplete line, we failed to include
- * it in the above loop because we hit oldlines == newlines == 0
- * before seeing it.
- */
- if (12 < size && !memcmp(line, "\\ ", 2))
- offset += linelen(line, size);
-
- patch->lines_added += added;
- patch->lines_deleted += deleted;
-
- if (0 < patch->is_new && oldlines)
- return error("new file depends on old contents");
- if (0 < patch->is_delete && newlines)
- return error("deleted file still has contents");
- return offset;
-}
-
-static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
-{
- unsigned long offset = 0;
- unsigned long oldlines = 0, newlines = 0, context = 0;
- struct fragment **fragp = &patch->fragments;
-
- while (size > 4 && !memcmp(line, "@@ -", 4)) {
- struct fragment *fragment;
- int len;
-
- fragment = xcalloc(1, sizeof(*fragment));
- fragment->linenr = linenr;
- len = parse_fragment(line, size, patch, fragment);
- if (len <= 0)
- die("corrupt patch at line %d", linenr);
- fragment->patch = line;
- fragment->size = len;
- oldlines += fragment->oldlines;
- newlines += fragment->newlines;
- context += fragment->leading + fragment->trailing;
-
- *fragp = fragment;
- fragp = &fragment->next;
-
- offset += len;
- line += len;
- size -= len;
- }
-
- /*
- * If something was removed (i.e. we have old-lines) it cannot
- * be creation, and if something was added it cannot be
- * deletion. However, the reverse is not true; --unified=0
- * patches that only add are not necessarily creation even
- * though they do not have any old lines, and ones that only
- * delete are not necessarily deletion.
- *
- * Unfortunately, a real creation/deletion patch do _not_ have
- * any context line by definition, so we cannot safely tell it
- * apart with --unified=0 insanity. At least if the patch has
- * more than one hunk it is not creation or deletion.
- */
- if (patch->is_new < 0 &&
- (oldlines || (patch->fragments && patch->fragments->next)))
- patch->is_new = 0;
- if (patch->is_delete < 0 &&
- (newlines || (patch->fragments && patch->fragments->next)))
- patch->is_delete = 0;
-
- if (0 < patch->is_new && oldlines)
- die("new file %s depends on old contents", patch->new_name);
- if (0 < patch->is_delete && newlines)
- die("deleted file %s still has contents", patch->old_name);
- if (!patch->is_delete && !newlines && context)
- fprintf(stderr, "** warning: file %s becomes empty but "
- "is not deleted\n", patch->new_name);
-
- return offset;
-}
-
-static inline int metadata_changes(struct patch *patch)
-{
- return patch->is_rename > 0 ||
- patch->is_copy > 0 ||
- patch->is_new > 0 ||
- patch->is_delete ||
- (patch->old_mode && patch->new_mode &&
- patch->old_mode != patch->new_mode);
-}
-
-static char *inflate_it(const void *data, unsigned long size,
- unsigned long inflated_size)
-{
- z_stream stream;
- void *out;
- int st;
-
- memset(&stream, 0, sizeof(stream));
-
- stream.next_in = (unsigned char *)data;
- stream.avail_in = size;
- stream.next_out = out = xmalloc(inflated_size);
- stream.avail_out = inflated_size;
- git_inflate_init(&stream);
- st = git_inflate(&stream, Z_FINISH);
- git_inflate_end(&stream);
- if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
- free(out);
- return NULL;
- }
- return out;
-}
-
-static struct fragment *parse_binary_hunk(char **buf_p,
- unsigned long *sz_p,
- int *status_p,
- int *used_p)
-{
- /*
- * Expect a line that begins with binary patch method ("literal"
- * or "delta"), followed by the length of data before deflating.
- * a sequence of 'length-byte' followed by base-85 encoded data
- * should follow, terminated by a newline.
- *
- * Each 5-byte sequence of base-85 encodes up to 4 bytes,
- * and we would limit the patch line to 66 characters,
- * so one line can fit up to 13 groups that would decode
- * to 52 bytes max. The length byte 'A'-'Z' corresponds
- * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
- */
- int llen, used;
- unsigned long size = *sz_p;
- char *buffer = *buf_p;
- int patch_method;
- unsigned long origlen;
- char *data = NULL;
- int hunk_size = 0;
- struct fragment *frag;
-
- llen = linelen(buffer, size);
- used = llen;
-
- *status_p = 0;
-
- if (!prefixcmp(buffer, "delta ")) {
- patch_method = BINARY_DELTA_DEFLATED;
- origlen = strtoul(buffer + 6, NULL, 10);
- }
- else if (!prefixcmp(buffer, "literal ")) {
- patch_method = BINARY_LITERAL_DEFLATED;
- origlen = strtoul(buffer + 8, NULL, 10);
- }
- else
- return NULL;
-
- linenr++;
- buffer += llen;
- while (1) {
- int byte_length, max_byte_length, newsize;
- llen = linelen(buffer, size);
- used += llen;
- linenr++;
- if (llen == 1) {
- /* consume the blank line */
- buffer++;
- size--;
- break;
- }
- /*
- * Minimum line is "A00000\n" which is 7-byte long,
- * and the line length must be multiple of 5 plus 2.
- */
- if ((llen < 7) || (llen-2) % 5)
- goto corrupt;
- max_byte_length = (llen - 2) / 5 * 4;
- byte_length = *buffer;
- if ('A' <= byte_length && byte_length <= 'Z')
- byte_length = byte_length - 'A' + 1;
- else if ('a' <= byte_length && byte_length <= 'z')
- byte_length = byte_length - 'a' + 27;
- else
- goto corrupt;
- /* if the input length was not multiple of 4, we would
- * have filler at the end but the filler should never
- * exceed 3 bytes
- */
- if (max_byte_length < byte_length ||
- byte_length <= max_byte_length - 4)
- goto corrupt;
- newsize = hunk_size + byte_length;
- data = xrealloc(data, newsize);
- if (decode_85(data + hunk_size, buffer + 1, byte_length))
- goto corrupt;
- hunk_size = newsize;
- buffer += llen;
- size -= llen;
- }
-
- frag = xcalloc(1, sizeof(*frag));
- frag->patch = inflate_it(data, hunk_size, origlen);
- if (!frag->patch)
- goto corrupt;
- free(data);
- frag->size = origlen;
- *buf_p = buffer;
- *sz_p = size;
- *used_p = used;
- frag->binary_patch_method = patch_method;
- return frag;
-
- corrupt:
- free(data);
- *status_p = -1;
- error("corrupt binary patch at line %d: %.*s",
- linenr-1, llen-1, buffer);
- return NULL;
-}
-
-static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
-{
- /*
- * We have read "GIT binary patch\n"; what follows is a line
- * that says the patch method (currently, either "literal" or
- * "delta") and the length of data before deflating; a
- * sequence of 'length-byte' followed by base-85 encoded data
- * follows.
- *
- * When a binary patch is reversible, there is another binary
- * hunk in the same format, starting with patch method (either
- * "literal" or "delta") with the length of data, and a sequence
- * of length-byte + base-85 encoded data, terminated with another
- * empty line. This data, when applied to the postimage, produces
- * the preimage.
- */
- struct fragment *forward;
- struct fragment *reverse;
- int status;
- int used, used_1;
-
- forward = parse_binary_hunk(&buffer, &size, &status, &used);
- if (!forward && !status)
- /* there has to be one hunk (forward hunk) */
- return error("unrecognized binary patch at line %d", linenr-1);
- if (status)
- /* otherwise we already gave an error message */
- return status;
-
- reverse = parse_binary_hunk(&buffer, &size, &status, &used_1);
- if (reverse)
- used += used_1;
- else if (status) {
- /*
- * Not having reverse hunk is not an error, but having
- * a corrupt reverse hunk is.
- */
- free((void*) forward->patch);
- free(forward);
- return status;
- }
- forward->next = reverse;
- patch->fragments = forward;
- patch->is_binary = 1;
- return used;
-}
-
-static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
-{
- int hdrsize, patchsize;
- int offset = find_header(buffer, size, &hdrsize, patch);
-
- if (offset < 0)
- return offset;
-
- patch->ws_rule = whitespace_rule(patch->new_name
- ? patch->new_name
- : patch->old_name);
-
- patchsize = parse_single_patch(buffer + offset + hdrsize,
- size - offset - hdrsize, patch);
-
- if (!patchsize) {
- static const char *binhdr[] = {
- "Binary files ",
- "Files ",
- NULL,
- };
- static const char git_binary[] = "GIT binary patch\n";
- int i;
- int hd = hdrsize + offset;
- unsigned long llen = linelen(buffer + hd, size - hd);
-
- if (llen == sizeof(git_binary) - 1 &&
- !memcmp(git_binary, buffer + hd, llen)) {
- int used;
- linenr++;
- used = parse_binary(buffer + hd + llen,
- size - hd - llen, patch);
- if (used)
- patchsize = used + llen;
- else
- patchsize = 0;
- }
- else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
- for (i = 0; binhdr[i]; i++) {
- int len = strlen(binhdr[i]);
- if (len < size - hd &&
- !memcmp(binhdr[i], buffer + hd, len)) {
- linenr++;
- patch->is_binary = 1;
- patchsize = llen;
- break;
- }
- }
- }
-
- /* Empty patch cannot be applied if it is a text patch
- * without metadata change. A binary patch appears
- * empty to us here.
- */
- if ((apply || check) &&
- (!patch->is_binary && !metadata_changes(patch)))
- die("patch with only garbage at line %d", linenr);
- }
-
- return offset + hdrsize + patchsize;
-}
-
-#define swap(a,b) myswap((a),(b),sizeof(a))
-
-#define myswap(a, b, size) do { \
- unsigned char mytmp[size]; \
- memcpy(mytmp, &a, size); \
- memcpy(&a, &b, size); \
- memcpy(&b, mytmp, size); \
-} while (0)
-
-static void reverse_patches(struct patch *p)
-{
- for (; p; p = p->next) {
- struct fragment *frag = p->fragments;
-
- swap(p->new_name, p->old_name);
- swap(p->new_mode, p->old_mode);
- swap(p->is_new, p->is_delete);
- swap(p->lines_added, p->lines_deleted);
- swap(p->old_sha1_prefix, p->new_sha1_prefix);
-
- for (; frag; frag = frag->next) {
- swap(frag->newpos, frag->oldpos);
- swap(frag->newlines, frag->oldlines);
- }
- }
-}
-
-static const char pluses[] =
-"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
-static const char minuses[]=
-"----------------------------------------------------------------------";
-
-static void show_stats(struct patch *patch)
-{
- struct strbuf qname = STRBUF_INIT;
- char *cp = patch->new_name ? patch->new_name : patch->old_name;
- int max, add, del;
-
- quote_c_style(cp, &qname, NULL, 0);
-
- /*
- * "scale" the filename
- */
- max = max_len;
- if (max > 50)
- max = 50;
-
- if (qname.len > max) {
- cp = strchr(qname.buf + qname.len + 3 - max, '/');
- if (!cp)
- cp = qname.buf + qname.len + 3 - max;
- strbuf_splice(&qname, 0, cp - qname.buf, "...", 3);
- }
-
- if (patch->is_binary) {
- printf(" %-*s | Bin\n", max, qname.buf);
- strbuf_release(&qname);
- return;
- }
-
- printf(" %-*s |", max, qname.buf);
- strbuf_release(&qname);
-
- /*
- * scale the add/delete
- */
- max = max + max_change > 70 ? 70 - max : max_change;
- add = patch->lines_added;
- del = patch->lines_deleted;
-
- if (max_change > 0) {
- int total = ((add + del) * max + max_change / 2) / max_change;
- add = (add * max + max_change / 2) / max_change;
- del = total - add;
- }
- printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted,
- add, pluses, del, minuses);
-}
-
-static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
-{
- switch (st->st_mode & S_IFMT) {
- case S_IFLNK:
- if (strbuf_readlink(buf, path, st->st_size) < 0)
- return error("unable to read symlink %s", path);
- return 0;
- case S_IFREG:
- if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
- return error("unable to open or read %s", path);
- convert_to_git(path, buf->buf, buf->len, buf, 0);
- return 0;
- default:
- return -1;
- }
-}
-
-/*
- * Update the preimage, and the common lines in postimage,
- * from buffer buf of length len. If postlen is 0 the postimage
- * is updated in place, otherwise it's updated on a new buffer
- * of length postlen
- */
-
-static void update_pre_post_images(struct image *preimage,
- struct image *postimage,
- char *buf,
- size_t len, size_t postlen)
-{
- int i, ctx;
- char *new, *old, *fixed;
- struct image fixed_preimage;
-
- /*
- * Update the preimage with whitespace fixes. Note that we
- * are not losing preimage->buf -- apply_one_fragment() will
- * free "oldlines".
- */
- prepare_image(&fixed_preimage, buf, len, 1);
- assert(fixed_preimage.nr == preimage->nr);
- for (i = 0; i < preimage->nr; i++)
- fixed_preimage.line[i].flag = preimage->line[i].flag;
- free(preimage->line_allocated);
- *preimage = fixed_preimage;
-
- /*
- * Adjust the common context lines in postimage. This can be
- * done in-place when we are just doing whitespace fixing,
- * which does not make the string grow, but needs a new buffer
- * when ignoring whitespace causes the update, since in this case
- * we could have e.g. tabs converted to multiple spaces.
- * We trust the caller to tell us if the update can be done
- * in place (postlen==0) or not.
- */
- old = postimage->buf;
- if (postlen)
- new = postimage->buf = xmalloc(postlen);
- else
- new = old;
- fixed = preimage->buf;
- for (i = ctx = 0; i < postimage->nr; i++) {
- size_t len = postimage->line[i].len;
- if (!(postimage->line[i].flag & LINE_COMMON)) {
- /* an added line -- no counterparts in preimage */
- memmove(new, old, len);
- old += len;
- new += len;
- continue;
- }
-
- /* a common context -- skip it in the original postimage */
- old += len;
-
- /* and find the corresponding one in the fixed preimage */
- while (ctx < preimage->nr &&
- !(preimage->line[ctx].flag & LINE_COMMON)) {
- fixed += preimage->line[ctx].len;
- ctx++;
- }
- if (preimage->nr <= ctx)
- die("oops");
-
- /* and copy it in, while fixing the line length */
- len = preimage->line[ctx].len;
- memcpy(new, fixed, len);
- new += len;
- fixed += len;
- postimage->line[i].len = len;
- ctx++;
- }
-
- /* Fix the length of the whole thing */
- postimage->len = new - postimage->buf;
-}
-
-static int match_fragment(struct image *img,
- struct image *preimage,
- struct image *postimage,
- unsigned long try,
- int try_lno,
- unsigned ws_rule,
- int match_beginning, int match_end)
-{
- int i;
- char *fixed_buf, *buf, *orig, *target;
-
- if (preimage->nr + try_lno > img->nr)
- return 0;
-
- if (match_beginning && try_lno)
- return 0;
-
- if (match_end && preimage->nr + try_lno != img->nr)
- return 0;
-
- /* Quick hash check */
- for (i = 0; i < preimage->nr; i++)
- if (preimage->line[i].hash != img->line[try_lno + i].hash)
- return 0;
-
- /*
- * Do we have an exact match? If we were told to match
- * at the end, size must be exactly at try+fragsize,
- * otherwise try+fragsize must be still within the preimage,
- * and either case, the old piece should match the preimage
- * exactly.
- */
- if ((match_end
- ? (try + preimage->len == img->len)
- : (try + preimage->len <= img->len)) &&
- !memcmp(img->buf + try, preimage->buf, preimage->len))
- return 1;
-
- /*
- * No exact match. If we are ignoring whitespace, run a line-by-line
- * fuzzy matching. We collect all the line length information because
- * we need it to adjust whitespace if we match.
- */
- if (ws_ignore_action == ignore_ws_change) {
- size_t imgoff = 0;
- size_t preoff = 0;
- size_t postlen = postimage->len;
- for (i = 0; i < preimage->nr; i++) {
- size_t prelen = preimage->line[i].len;
- size_t imglen = img->line[try_lno+i].len;
-
- if (!fuzzy_matchlines(img->buf + try + imgoff, imglen,
- preimage->buf + preoff, prelen))
- return 0;
- if (preimage->line[i].flag & LINE_COMMON)
- postlen += imglen - prelen;
- imgoff += imglen;
- preoff += prelen;
- }
-
- /*
- * Ok, the preimage matches with whitespace fuzz. Update it and
- * the common postimage lines to use the same whitespace as the
- * target. imgoff now holds the true length of the target that
- * matches the preimage, and we need to update the line lengths
- * of the preimage to match the target ones.
- */
- fixed_buf = xmalloc(imgoff);
- memcpy(fixed_buf, img->buf + try, imgoff);
- for (i = 0; i < preimage->nr; i++)
- preimage->line[i].len = img->line[try_lno+i].len;
-
- /*
- * Update the preimage buffer and the postimage context lines.
- */
- update_pre_post_images(preimage, postimage,
- fixed_buf, imgoff, postlen);
- return 1;
- }
-
- if (ws_error_action != correct_ws_error)
- return 0;
-
- /*
- * The hunk does not apply byte-by-byte, but the hash says
- * it might with whitespace fuzz. We haven't been asked to
- * ignore whitespace, we were asked to correct whitespace
- * errors, so let's try matching after whitespace correction.
- */
- fixed_buf = xmalloc(preimage->len + 1);
- buf = fixed_buf;
- orig = preimage->buf;
- target = img->buf + try;
- for (i = 0; i < preimage->nr; i++) {
- size_t fixlen; /* length after fixing the preimage */
- size_t oldlen = preimage->line[i].len;
- size_t tgtlen = img->line[try_lno + i].len;
- size_t tgtfixlen; /* length after fixing the target line */
- char tgtfixbuf[1024], *tgtfix;
- int match;
-
- /* Try fixing the line in the preimage */
- fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL);
-
- /* Try fixing the line in the target */
- if (sizeof(tgtfixbuf) > tgtlen)
- tgtfix = tgtfixbuf;
- else
- tgtfix = xmalloc(tgtlen);
- tgtfixlen = ws_fix_copy(tgtfix, target, tgtlen, ws_rule, NULL);
-
- /*
- * If they match, either the preimage was based on
- * a version before our tree fixed whitespace breakage,
- * or we are lacking a whitespace-fix patch the tree
- * the preimage was based on already had (i.e. target
- * has whitespace breakage, the preimage doesn't).
- * In either case, we are fixing the whitespace breakages
- * so we might as well take the fix together with their
- * real change.
- */
- match = (tgtfixlen == fixlen && !memcmp(tgtfix, buf, fixlen));
-
- if (tgtfix != tgtfixbuf)
- free(tgtfix);
- if (!match)
- goto unmatch_exit;
-
- orig += oldlen;
- buf += fixlen;
- target += tgtlen;
- }
-
- /*
- * Yes, the preimage is based on an older version that still
- * has whitespace breakages unfixed, and fixing them makes the
- * hunk match. Update the context lines in the postimage.
- */
- update_pre_post_images(preimage, postimage,
- fixed_buf, buf - fixed_buf, 0);
- return 1;
-
- unmatch_exit:
- free(fixed_buf);
- return 0;
-}
-
-static int find_pos(struct image *img,
- struct image *preimage,
- struct image *postimage,
- int line,
- unsigned ws_rule,
- int match_beginning, int match_end)
-{
- int i;
- unsigned long backwards, forwards, try;
- int backwards_lno, forwards_lno, try_lno;
-
- if (preimage->nr > img->nr)
- return -1;
-
- /*
- * If match_beginning or match_end is specified, there is no
- * point starting from a wrong line that will never match and
- * wander around and wait for a match at the specified end.
- */
- if (match_beginning)
- line = 0;
- else if (match_end)
- line = img->nr - preimage->nr;
-
- if (line > img->nr)
- line = img->nr;
-
- try = 0;
- for (i = 0; i < line; i++)
- try += img->line[i].len;
-
- /*
- * There's probably some smart way to do this, but I'll leave
- * that to the smart and beautiful people. I'm simple and stupid.
- */
- backwards = try;
- backwards_lno = line;
- forwards = try;
- forwards_lno = line;
- try_lno = line;
-
- for (i = 0; ; i++) {
- if (match_fragment(img, preimage, postimage,
- try, try_lno, ws_rule,
- match_beginning, match_end))
- return try_lno;
-
- again:
- if (backwards_lno == 0 && forwards_lno == img->nr)
- break;
-
- if (i & 1) {
- if (backwards_lno == 0) {
- i++;
- goto again;
- }
- backwards_lno--;
- backwards -= img->line[backwards_lno].len;
- try = backwards;
- try_lno = backwards_lno;
- } else {
- if (forwards_lno == img->nr) {
- i++;
- goto again;
- }
- forwards += img->line[forwards_lno].len;
- forwards_lno++;
- try = forwards;
- try_lno = forwards_lno;
- }
-
- }
- return -1;
-}
-
-static void remove_first_line(struct image *img)
-{
- img->buf += img->line[0].len;
- img->len -= img->line[0].len;
- img->line++;
- img->nr--;
-}
-
-static void remove_last_line(struct image *img)
-{
- img->len -= img->line[--img->nr].len;
-}
-
-static void update_image(struct image *img,
- int applied_pos,
- struct image *preimage,
- struct image *postimage)
-{
- /*
- * remove the copy of preimage at offset in img
- * and replace it with postimage
- */
- int i, nr;
- size_t remove_count, insert_count, applied_at = 0;
- char *result;
-
- for (i = 0; i < applied_pos; i++)
- applied_at += img->line[i].len;
-
- remove_count = 0;
- for (i = 0; i < preimage->nr; i++)
- remove_count += img->line[applied_pos + i].len;
- insert_count = postimage->len;
-
- /* Adjust the contents */
- result = xmalloc(img->len + insert_count - remove_count + 1);
- memcpy(result, img->buf, applied_at);
- memcpy(result + applied_at, postimage->buf, postimage->len);
- memcpy(result + applied_at + postimage->len,
- img->buf + (applied_at + remove_count),
- img->len - (applied_at + remove_count));
- free(img->buf);
- img->buf = result;
- img->len += insert_count - remove_count;
- result[img->len] = '\0';
-
- /* Adjust the line table */
- nr = img->nr + postimage->nr - preimage->nr;
- if (preimage->nr < postimage->nr) {
- /*
- * NOTE: this knows that we never call remove_first_line()
- * on anything other than pre/post image.
- */
- img->line = xrealloc(img->line, nr * sizeof(*img->line));
- img->line_allocated = img->line;
- }
- if (preimage->nr != postimage->nr)
- memmove(img->line + applied_pos + postimage->nr,
- img->line + applied_pos + preimage->nr,
- (img->nr - (applied_pos + preimage->nr)) *
- sizeof(*img->line));
- memcpy(img->line + applied_pos,
- postimage->line,
- postimage->nr * sizeof(*img->line));
- img->nr = nr;
-}
-
-static int apply_one_fragment(struct image *img, struct fragment *frag,
- int inaccurate_eof, unsigned ws_rule)
-{
- int match_beginning, match_end;
- const char *patch = frag->patch;
- int size = frag->size;
- char *old, *new, *oldlines, *newlines;
- int new_blank_lines_at_end = 0;
- unsigned long leading, trailing;
- int pos, applied_pos;
- struct image preimage;
- struct image postimage;
-
- memset(&preimage, 0, sizeof(preimage));
- memset(&postimage, 0, sizeof(postimage));
- oldlines = xmalloc(size);
- newlines = xmalloc(size);
-
- old = oldlines;
- new = newlines;
- while (size > 0) {
- char first;
- int len = linelen(patch, size);
- int plen, added;
- int added_blank_line = 0;
- int is_blank_context = 0;
-
- if (!len)
- break;
-
- /*
- * "plen" is how much of the line we should use for
- * the actual patch data. Normally we just remove the
- * first character on the line, but if the line is
- * followed by "\ No newline", then we also remove the
- * last one (which is the newline, of course).
- */
- plen = len - 1;
- if (len < size && patch[len] == '\\')
- plen--;
- first = *patch;
- if (apply_in_reverse) {
- if (first == '-')
- first = '+';
- else if (first == '+')
- first = '-';
- }
-
- switch (first) {
- case '\n':
- /* Newer GNU diff, empty context line */
- if (plen < 0)
- /* ... followed by '\No newline'; nothing */
- break;
- *old++ = '\n';
- *new++ = '\n';
- add_line_info(&preimage, "\n", 1, LINE_COMMON);
- add_line_info(&postimage, "\n", 1, LINE_COMMON);
- is_blank_context = 1;
- break;
- case ' ':
- if (plen && (ws_rule & WS_BLANK_AT_EOF) &&
- ws_blank_line(patch + 1, plen, ws_rule))
- is_blank_context = 1;
- case '-':
- memcpy(old, patch + 1, plen);
- add_line_info(&preimage, old, plen,
- (first == ' ' ? LINE_COMMON : 0));
- old += plen;
- if (first == '-')
- break;
- /* Fall-through for ' ' */
- case '+':
- /* --no-add does not add new lines */
- if (first == '+' && no_add)
- break;
-
- if (first != '+' ||
- !whitespace_error ||
- ws_error_action != correct_ws_error) {
- memcpy(new, patch + 1, plen);
- added = plen;
- }
- else {
- added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws);
- }
- add_line_info(&postimage, new, added,
- (first == '+' ? 0 : LINE_COMMON));
- new += added;
- if (first == '+' &&
- (ws_rule & WS_BLANK_AT_EOF) &&
- ws_blank_line(patch + 1, plen, ws_rule))
- added_blank_line = 1;
- break;
- case '@': case '\\':
- /* Ignore it, we already handled it */
- break;
- default:
- if (apply_verbosely)
- error("invalid start of line: '%c'", first);
- return -1;
- }
- if (added_blank_line)
- new_blank_lines_at_end++;
- else if (is_blank_context)
- ;
- else
- new_blank_lines_at_end = 0;
- patch += len;
- size -= len;
- }
- if (inaccurate_eof &&
- old > oldlines && old[-1] == '\n' &&
- new > newlines && new[-1] == '\n') {
- old--;
- new--;
- }
-
- leading = frag->leading;
- trailing = frag->trailing;
-
- /*
- * A hunk to change lines at the beginning would begin with
- * @@ -1,L +N,M @@
- * but we need to be careful. -U0 that inserts before the second
- * line also has this pattern.
- *
- * And a hunk to add to an empty file would begin with
- * @@ -0,0 +N,M @@
- *
- * In other words, a hunk that is (frag->oldpos <= 1) with or
- * without leading context must match at the beginning.
- */
- match_beginning = (!frag->oldpos ||
- (frag->oldpos == 1 && !unidiff_zero));
-
- /*
- * A hunk without trailing lines must match at the end.
- * However, we simply cannot tell if a hunk must match end
- * from the lack of trailing lines if the patch was generated
- * with unidiff without any context.
- */
- match_end = !unidiff_zero && !trailing;
-
- pos = frag->newpos ? (frag->newpos - 1) : 0;
- preimage.buf = oldlines;
- preimage.len = old - oldlines;
- postimage.buf = newlines;
- postimage.len = new - newlines;
- preimage.line = preimage.line_allocated;
- postimage.line = postimage.line_allocated;
-
- for (;;) {
-
- applied_pos = find_pos(img, &preimage, &postimage, pos,
- ws_rule, match_beginning, match_end);
-
- if (applied_pos >= 0)
- break;
-
- /* Am I at my context limits? */
- if ((leading <= p_context) && (trailing <= p_context))
- break;
- if (match_beginning || match_end) {
- match_beginning = match_end = 0;
- continue;
- }
-
- /*
- * Reduce the number of context lines; reduce both
- * leading and trailing if they are equal otherwise
- * just reduce the larger context.
- */
- if (leading >= trailing) {
- remove_first_line(&preimage);
- remove_first_line(&postimage);
- pos--;
- leading--;
- }
- if (trailing > leading) {
- remove_last_line(&preimage);
- remove_last_line(&postimage);
- trailing--;
- }
- }
-
- if (applied_pos >= 0) {
- if (new_blank_lines_at_end &&
- preimage.nr + applied_pos == img->nr &&
- (ws_rule & WS_BLANK_AT_EOF) &&
- ws_error_action != nowarn_ws_error) {
- record_ws_error(WS_BLANK_AT_EOF, "+", 1, frag->linenr);
- if (ws_error_action == correct_ws_error) {
- while (new_blank_lines_at_end--)
- remove_last_line(&postimage);
- }
- /*
- * We would want to prevent write_out_results()
- * from taking place in apply_patch() that follows
- * the callchain led us here, which is:
- * apply_patch->check_patch_list->check_patch->
- * apply_data->apply_fragments->apply_one_fragment
- */
- if (ws_error_action == die_on_ws_error)
- apply = 0;
- }
-
- /*
- * Warn if it was necessary to reduce the number
- * of context lines.
- */
- if ((leading != frag->leading) ||
- (trailing != frag->trailing))
- fprintf(stderr, "Context reduced to (%ld/%ld)"
- " to apply fragment at %d\n",
- leading, trailing, applied_pos+1);
- update_image(img, applied_pos, &preimage, &postimage);
- } else {
- if (apply_verbosely)
- error("while searching for:\n%.*s",
- (int)(old - oldlines), oldlines);
- }
-
- free(oldlines);
- free(newlines);
- free(preimage.line_allocated);
- free(postimage.line_allocated);
-
- return (applied_pos < 0);
-}
-
-static int apply_binary_fragment(struct image *img, struct patch *patch)
-{
- struct fragment *fragment = patch->fragments;
- unsigned long len;
- void *dst;
-
- /* Binary patch is irreversible without the optional second hunk */
- if (apply_in_reverse) {
- if (!fragment->next)
- return error("cannot reverse-apply a binary patch "
- "without the reverse hunk to '%s'",
- patch->new_name
- ? patch->new_name : patch->old_name);
- fragment = fragment->next;
- }
- switch (fragment->binary_patch_method) {
- case BINARY_DELTA_DEFLATED:
- dst = patch_delta(img->buf, img->len, fragment->patch,
- fragment->size, &len);
- if (!dst)
- return -1;
- clear_image(img);
- img->buf = dst;
- img->len = len;
- return 0;
- case BINARY_LITERAL_DEFLATED:
- clear_image(img);
- img->len = fragment->size;
- img->buf = xmalloc(img->len+1);
- memcpy(img->buf, fragment->patch, img->len);
- img->buf[img->len] = '\0';
- return 0;
- }
- return -1;
-}
-
-static int apply_binary(struct image *img, struct patch *patch)
-{
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
- unsigned char sha1[20];
-
- /*
- * For safety, we require patch index line to contain
- * full 40-byte textual SHA1 for old and new, at least for now.
- */
- if (strlen(patch->old_sha1_prefix) != 40 ||
- strlen(patch->new_sha1_prefix) != 40 ||
- get_sha1_hex(patch->old_sha1_prefix, sha1) ||
- get_sha1_hex(patch->new_sha1_prefix, sha1))
- return error("cannot apply binary patch to '%s' "
- "without full index line", name);
-
- if (patch->old_name) {
- /*
- * See if the old one matches what the patch
- * applies to.
- */
- hash_sha1_file(img->buf, img->len, blob_type, sha1);
- if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
- return error("the patch applies to '%s' (%s), "
- "which does not match the "
- "current contents.",
- name, sha1_to_hex(sha1));
- }
- else {
- /* Otherwise, the old one must be empty. */
- if (img->len)
- return error("the patch applies to an empty "
- "'%s' but it is not empty", name);
- }
-
- get_sha1_hex(patch->new_sha1_prefix, sha1);
- if (is_null_sha1(sha1)) {
- clear_image(img);
- return 0; /* deletion patch */
- }
-
- if (has_sha1_file(sha1)) {
- /* We already have the postimage */
- enum object_type type;
- unsigned long size;
- char *result;
-
- result = read_sha1_file(sha1, &type, &size);
- if (!result)
- return error("the necessary postimage %s for "
- "'%s' cannot be read",
- patch->new_sha1_prefix, name);
- clear_image(img);
- img->buf = result;
- img->len = size;
- } else {
- /*
- * We have verified buf matches the preimage;
- * apply the patch data to it, which is stored
- * in the patch->fragments->{patch,size}.
- */
- if (apply_binary_fragment(img, patch))
- return error("binary patch does not apply to '%s'",
- name);
-
- /* verify that the result matches */
- hash_sha1_file(img->buf, img->len, blob_type, sha1);
- if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
- return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)",
- name, patch->new_sha1_prefix, sha1_to_hex(sha1));
- }
-
- return 0;
-}
-
-static int apply_fragments(struct image *img, struct patch *patch)
-{
- struct fragment *frag = patch->fragments;
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
- unsigned ws_rule = patch->ws_rule;
- unsigned inaccurate_eof = patch->inaccurate_eof;
-
- if (patch->is_binary)
- return apply_binary(img, patch);
-
- while (frag) {
- if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) {
- error("patch failed: %s:%ld", name, frag->oldpos);
- if (!apply_with_reject)
- return -1;
- frag->rejected = 1;
- }
- frag = frag->next;
- }
- return 0;
-}
-
-static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
-{
- if (!ce)
- return 0;
-
- if (S_ISGITLINK(ce->ce_mode)) {
- strbuf_grow(buf, 100);
- strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1));
- } else {
- enum object_type type;
- unsigned long sz;
- char *result;
-
- result = read_sha1_file(ce->sha1, &type, &sz);
- if (!result)
- return -1;
- /* XXX read_sha1_file NUL-terminates */
- strbuf_attach(buf, result, sz, sz + 1);
- }
- return 0;
-}
-
-static struct patch *in_fn_table(const char *name)
-{
- struct string_list_item *item;
-
- if (name == NULL)
- return NULL;
-
- item = string_list_lookup(name, &fn_table);
- if (item != NULL)
- return (struct patch *)item->util;
-
- return NULL;
-}
-
-/*
- * item->util in the filename table records the status of the path.
- * Usually it points at a patch (whose result records the contents
- * of it after applying it), but it could be PATH_WAS_DELETED for a
- * path that a previously applied patch has already removed.
- */
- #define PATH_TO_BE_DELETED ((struct patch *) -2)
-#define PATH_WAS_DELETED ((struct patch *) -1)
-
-static int to_be_deleted(struct patch *patch)
-{
- return patch == PATH_TO_BE_DELETED;
-}
-
-static int was_deleted(struct patch *patch)
-{
- return patch == PATH_WAS_DELETED;
-}
-
-static void add_to_fn_table(struct patch *patch)
-{
- struct string_list_item *item;
-
- /*
- * Always add new_name unless patch is a deletion
- * This should cover the cases for normal diffs,
- * file creations and copies
- */
- if (patch->new_name != NULL) {
- item = string_list_insert(patch->new_name, &fn_table);
- item->util = patch;
- }
-
- /*
- * store a failure on rename/deletion cases because
- * later chunks shouldn't patch old names
- */
- if ((patch->new_name == NULL) || (patch->is_rename)) {
- item = string_list_insert(patch->old_name, &fn_table);
- item->util = PATH_WAS_DELETED;
- }
-}
-
-static void prepare_fn_table(struct patch *patch)
-{
- /*
- * store information about incoming file deletion
- */
- while (patch) {
- if ((patch->new_name == NULL) || (patch->is_rename)) {
- struct string_list_item *item;
- item = string_list_insert(patch->old_name, &fn_table);
- item->util = PATH_TO_BE_DELETED;
- }
- patch = patch->next;
- }
-}
-
-static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
-{
- struct strbuf buf = STRBUF_INIT;
- struct image image;
- size_t len;
- char *img;
- struct patch *tpatch;
-
- if (!(patch->is_copy || patch->is_rename) &&
- (tpatch = in_fn_table(patch->old_name)) != NULL && !to_be_deleted(tpatch)) {
- if (was_deleted(tpatch)) {
- return error("patch %s has been renamed/deleted",
- patch->old_name);
- }
- /* We have a patched copy in memory use that */
- strbuf_add(&buf, tpatch->result, tpatch->resultsize);
- } else if (cached) {
- if (read_file_or_gitlink(ce, &buf))
- return error("read of %s failed", patch->old_name);
- } else if (patch->old_name) {
- if (S_ISGITLINK(patch->old_mode)) {
- if (ce) {
- read_file_or_gitlink(ce, &buf);
- } else {
- /*
- * There is no way to apply subproject
- * patch without looking at the index.
- */
- patch->fragments = NULL;
- }
- } else {
- if (read_old_data(st, patch->old_name, &buf))
- return error("read of %s failed", patch->old_name);
- }
- }
-
- img = strbuf_detach(&buf, &len);
- prepare_image(&image, img, len, !patch->is_binary);
-
- if (apply_fragments(&image, patch) < 0)
- return -1; /* note with --reject this succeeds. */
- patch->result = image.buf;
- patch->resultsize = image.len;
- add_to_fn_table(patch);
- free(image.line_allocated);
-
- if (0 < patch->is_delete && patch->resultsize)
- return error("removal patch leaves file contents");
-
- return 0;
-}
-
-static int check_to_create_blob(const char *new_name, int ok_if_exists)
-{
- struct stat nst;
- if (!lstat(new_name, &nst)) {
- if (S_ISDIR(nst.st_mode) || ok_if_exists)
- return 0;
- /*
- * A leading component of new_name might be a symlink
- * that is going to be removed with this patch, but
- * still pointing at somewhere that has the path.
- * In such a case, path "new_name" does not exist as
- * far as git is concerned.
- */
- if (has_symlink_leading_path(new_name, strlen(new_name)))
- return 0;
-
- return error("%s: already exists in working directory", new_name);
- }
- else if ((errno != ENOENT) && (errno != ENOTDIR))
- return error("%s: %s", new_name, strerror(errno));
- return 0;
-}
-
-static int verify_index_match(struct cache_entry *ce, struct stat *st)
-{
- if (S_ISGITLINK(ce->ce_mode)) {
- if (!S_ISDIR(st->st_mode))
- return -1;
- return 0;
- }
- return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
-}
-
-static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st)
-{
- const char *old_name = patch->old_name;
- struct patch *tpatch = NULL;
- int stat_ret = 0;
- unsigned st_mode = 0;
-
- /*
- * Make sure that we do not have local modifications from the
- * index when we are looking at the index. Also make sure
- * we have the preimage file to be patched in the work tree,
- * unless --cached, which tells git to apply only in the index.
- */
- if (!old_name)
- return 0;
-
- assert(patch->is_new <= 0);
-
- if (!(patch->is_copy || patch->is_rename) &&
- (tpatch = in_fn_table(old_name)) != NULL && !to_be_deleted(tpatch)) {
- if (was_deleted(tpatch))
- return error("%s: has been deleted/renamed", old_name);
- st_mode = tpatch->new_mode;
- } else if (!cached) {
- stat_ret = lstat(old_name, st);
- if (stat_ret && errno != ENOENT)
- return error("%s: %s", old_name, strerror(errno));
- }
-
- if (to_be_deleted(tpatch))
- tpatch = NULL;
-
- if (check_index && !tpatch) {
- int pos = cache_name_pos(old_name, strlen(old_name));
- if (pos < 0) {
- if (patch->is_new < 0)
- goto is_new;
- return error("%s: does not exist in index", old_name);
- }
- *ce = active_cache[pos];
- if (stat_ret < 0) {
- struct checkout costate;
- /* checkout */
- costate.base_dir = "";
- costate.base_dir_len = 0;
- costate.force = 0;
- costate.quiet = 0;
- costate.not_new = 0;
- costate.refresh_cache = 1;
- if (checkout_entry(*ce, &costate, NULL) ||
- lstat(old_name, st))
- return -1;
- }
- if (!cached && verify_index_match(*ce, st))
- return error("%s: does not match index", old_name);
- if (cached)
- st_mode = (*ce)->ce_mode;
- } else if (stat_ret < 0) {
- if (patch->is_new < 0)
- goto is_new;
- return error("%s: %s", old_name, strerror(errno));
- }
-
- if (!cached && !tpatch)
- st_mode = ce_mode_from_stat(*ce, st->st_mode);
-
- if (patch->is_new < 0)
- patch->is_new = 0;
- if (!patch->old_mode)
- patch->old_mode = st_mode;
- if ((st_mode ^ patch->old_mode) & S_IFMT)
- return error("%s: wrong type", old_name);
- if (st_mode != patch->old_mode)
- warning("%s has type %o, expected %o",
- old_name, st_mode, patch->old_mode);
- if (!patch->new_mode && !patch->is_delete)
- patch->new_mode = st_mode;
- return 0;
-
- is_new:
- patch->is_new = 1;
- patch->is_delete = 0;
- patch->old_name = NULL;
- return 0;
-}
-
-static int check_patch(struct patch *patch)
-{
- struct stat st;
- const char *old_name = patch->old_name;
- const char *new_name = patch->new_name;
- const char *name = old_name ? old_name : new_name;
- struct cache_entry *ce = NULL;
- struct patch *tpatch;
- int ok_if_exists;
- int status;
-
- patch->rejected = 1; /* we will drop this after we succeed */
-
- status = check_preimage(patch, &ce, &st);
- if (status)
- return status;
- old_name = patch->old_name;
-
- if ((tpatch = in_fn_table(new_name)) &&
- (was_deleted(tpatch) || to_be_deleted(tpatch)))
- /*
- * A type-change diff is always split into a patch to
- * delete old, immediately followed by a patch to
- * create new (see diff.c::run_diff()); in such a case
- * it is Ok that the entry to be deleted by the
- * previous patch is still in the working tree and in
- * the index.
- */
- ok_if_exists = 1;
- else
- ok_if_exists = 0;
-
- if (new_name &&
- ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) {
- if (check_index &&
- cache_name_pos(new_name, strlen(new_name)) >= 0 &&
- !ok_if_exists)
- return error("%s: already exists in index", new_name);
- if (!cached) {
- int err = check_to_create_blob(new_name, ok_if_exists);
- if (err)
- return err;
- }
- if (!patch->new_mode) {
- if (0 < patch->is_new)
- patch->new_mode = S_IFREG | 0644;
- else
- patch->new_mode = patch->old_mode;
- }
- }
-
- if (new_name && old_name) {
- int same = !strcmp(old_name, new_name);
- if (!patch->new_mode)
- patch->new_mode = patch->old_mode;
- if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
- return error("new mode (%o) of %s does not match old mode (%o)%s%s",
- patch->new_mode, new_name, patch->old_mode,
- same ? "" : " of ", same ? "" : old_name);
- }
-
- if (apply_data(patch, &st, ce) < 0)
- return error("%s: patch does not apply", name);
- patch->rejected = 0;
- return 0;
-}
-
-static int check_patch_list(struct patch *patch)
-{
- int err = 0;
-
- prepare_fn_table(patch);
- while (patch) {
- if (apply_verbosely)
- say_patch_name(stderr,
- "Checking patch ", patch, "...\n");
- err |= check_patch(patch);
- patch = patch->next;
- }
- return err;
-}
-
-/* This function tries to read the sha1 from the current index */
-static int get_current_sha1(const char *path, unsigned char *sha1)
-{
- int pos;
-
- if (read_cache() < 0)
- return -1;
- pos = cache_name_pos(path, strlen(path));
- if (pos < 0)
- return -1;
- hashcpy(sha1, active_cache[pos]->sha1);
- return 0;
-}
-
-/* Build an index that contains the just the files needed for a 3way merge */
-static void build_fake_ancestor(struct patch *list, const char *filename)
-{
- struct patch *patch;
- struct index_state result = { NULL };
- int fd;
-
- /* Once we start supporting the reverse patch, it may be
- * worth showing the new sha1 prefix, but until then...
- */
- for (patch = list; patch; patch = patch->next) {
- const unsigned char *sha1_ptr;
- unsigned char sha1[20];
- struct cache_entry *ce;
- const char *name;
-
- name = patch->old_name ? patch->old_name : patch->new_name;
- if (0 < patch->is_new)
- continue;
- else if (get_sha1(patch->old_sha1_prefix, sha1))
- /* git diff has no index line for mode/type changes */
- if (!patch->lines_added && !patch->lines_deleted) {
- if (get_current_sha1(patch->new_name, sha1) ||
- get_current_sha1(patch->old_name, sha1))
- die("mode change for %s, which is not "
- "in current HEAD", name);
- sha1_ptr = sha1;
- } else
- die("sha1 information is lacking or useless "
- "(%s).", name);
- else
- sha1_ptr = sha1;
-
- ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0);
- if (!ce)
- die("make_cache_entry failed for path '%s'", name);
- if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD))
- die ("Could not add %s to temporary index", name);
- }
-
- fd = open(filename, O_WRONLY | O_CREAT, 0666);
- if (fd < 0 || write_index(&result, fd) || close(fd))
- die ("Could not write temporary index to %s", filename);
-
- discard_index(&result);
-}
-
-static void stat_patch_list(struct patch *patch)
-{
- int files, adds, dels;
-
- for (files = adds = dels = 0 ; patch ; patch = patch->next) {
- files++;
- adds += patch->lines_added;
- dels += patch->lines_deleted;
- show_stats(patch);
- }
-
- printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
-}
-
-static void numstat_patch_list(struct patch *patch)
-{
- for ( ; patch; patch = patch->next) {
- const char *name;
- name = patch->new_name ? patch->new_name : patch->old_name;
- if (patch->is_binary)
- printf("-\t-\t");
- else
- printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
- write_name_quoted(name, stdout, line_termination);
- }
-}
-
-static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
-{
- if (mode)
- printf(" %s mode %06o %s\n", newdelete, mode, name);
- else
- printf(" %s %s\n", newdelete, name);
-}
-
-static void show_mode_change(struct patch *p, int show_name)
-{
- if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
- if (show_name)
- printf(" mode change %06o => %06o %s\n",
- p->old_mode, p->new_mode, p->new_name);
- else
- printf(" mode change %06o => %06o\n",
- p->old_mode, p->new_mode);
- }
-}
-
-static void show_rename_copy(struct patch *p)
-{
- const char *renamecopy = p->is_rename ? "rename" : "copy";
- const char *old, *new;
-
- /* Find common prefix */
- old = p->old_name;
- new = p->new_name;
- while (1) {
- const char *slash_old, *slash_new;
- slash_old = strchr(old, '/');
- slash_new = strchr(new, '/');
- if (!slash_old ||
- !slash_new ||
- slash_old - old != slash_new - new ||
- memcmp(old, new, slash_new - new))
- break;
- old = slash_old + 1;
- new = slash_new + 1;
- }
- /* p->old_name thru old is the common prefix, and old and new
- * through the end of names are renames
- */
- if (old != p->old_name)
- printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
- (int)(old - p->old_name), p->old_name,
- old, new, p->score);
- else
- printf(" %s %s => %s (%d%%)\n", renamecopy,
- p->old_name, p->new_name, p->score);
- show_mode_change(p, 0);
-}
-
-static void summary_patch_list(struct patch *patch)
-{
- struct patch *p;
-
- for (p = patch; p; p = p->next) {
- if (p->is_new)
- show_file_mode_name("create", p->new_mode, p->new_name);
- else if (p->is_delete)
- show_file_mode_name("delete", p->old_mode, p->old_name);
- else {
- if (p->is_rename || p->is_copy)
- show_rename_copy(p);
- else {
- if (p->score) {
- printf(" rewrite %s (%d%%)\n",
- p->new_name, p->score);
- show_mode_change(p, 0);
- }
- else
- show_mode_change(p, 1);
- }
- }
- }
-}
-
-static void patch_stats(struct patch *patch)
-{
- int lines = patch->lines_added + patch->lines_deleted;
-
- if (lines > max_change)
- max_change = lines;
- if (patch->old_name) {
- int len = quote_c_style(patch->old_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->old_name);
- if (len > max_len)
- max_len = len;
- }
- if (patch->new_name) {
- int len = quote_c_style(patch->new_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->new_name);
- if (len > max_len)
- max_len = len;
- }
-}
-
-static void remove_file(struct patch *patch, int rmdir_empty)
-{
- if (update_index) {
- if (remove_file_from_cache(patch->old_name) < 0)
- die("unable to remove %s from index", patch->old_name);
- }
- if (!cached) {
- if (S_ISGITLINK(patch->old_mode)) {
- if (rmdir(patch->old_name))
- warning("unable to remove submodule %s",
- patch->old_name);
- } else if (!unlink_or_warn(patch->old_name) && rmdir_empty) {
- remove_path(patch->old_name);
- }
- }
-}
-
-static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
-{
- struct stat st;
- struct cache_entry *ce;
- int namelen = strlen(path);
- unsigned ce_size = cache_entry_size(namelen);
-
- if (!update_index)
- return;
-
- ce = xcalloc(1, ce_size);
- memcpy(ce->name, path, namelen);
- ce->ce_mode = create_ce_mode(mode);
- ce->ce_flags = namelen;
- if (S_ISGITLINK(mode)) {
- const char *s = buf;
-
- if (get_sha1_hex(s + strlen("Subproject commit "), ce->sha1))
- die("corrupt patch for subproject %s", path);
- } else {
- if (!cached) {
- if (lstat(path, &st) < 0)
- die_errno("unable to stat newly created file '%s'",
- path);
- fill_stat_cache_info(ce, &st);
- }
- if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
- die("unable to create backing store for newly created file %s", path);
- }
- if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
- die("unable to add cache entry for %s", path);
-}
-
-static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
-{
- int fd;
- struct strbuf nbuf = STRBUF_INIT;
-
- if (S_ISGITLINK(mode)) {
- struct stat st;
- if (!lstat(path, &st) && S_ISDIR(st.st_mode))
- return 0;
- return mkdir(path, 0777);
- }
-
- if (has_symlinks && S_ISLNK(mode))
- /* Although buf:size is counted string, it also is NUL
- * terminated.
- */
- return symlink(buf, path);
-
- fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
- if (fd < 0)
- return -1;
-
- if (convert_to_working_tree(path, buf, size, &nbuf)) {
- size = nbuf.len;
- buf = nbuf.buf;
- }
- write_or_die(fd, buf, size);
- strbuf_release(&nbuf);
-
- if (close(fd) < 0)
- die_errno("closing file '%s'", path);
- return 0;
-}
-
-/*
- * We optimistically assume that the directories exist,
- * which is true 99% of the time anyway. If they don't,
- * we create them and try again.
- */
-static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
-{
- if (cached)
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
-
- if (errno == ENOENT) {
- if (safe_create_leading_directories(path))
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
- }
-
- if (errno == EEXIST || errno == EACCES) {
- /* We may be trying to create a file where a directory
- * used to be.
- */
- struct stat st;
- if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
- errno = EEXIST;
- }
-
- if (errno == EEXIST) {
- unsigned int nr = getpid();
-
- for (;;) {
- char newpath[PATH_MAX];
- mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
- if (!try_create_file(newpath, mode, buf, size)) {
- if (!rename(newpath, path))
- return;
- unlink_or_warn(newpath);
- break;
- }
- if (errno != EEXIST)
- break;
- ++nr;
- }
- }
- die_errno("unable to write file '%s' mode %o", path, mode);
-}
-
-static void create_file(struct patch *patch)
-{
- char *path = patch->new_name;
- unsigned mode = patch->new_mode;
- unsigned long size = patch->resultsize;
- char *buf = patch->result;
-
- if (!mode)
- mode = S_IFREG | 0644;
- create_one_file(path, mode, buf, size);
- add_index_file(path, mode, buf, size);
-}
-
-/* phase zero is to remove, phase one is to create */
-static void write_out_one_result(struct patch *patch, int phase)
-{
- if (patch->is_delete > 0) {
- if (phase == 0)
- remove_file(patch, 1);
- return;
- }
- if (patch->is_new > 0 || patch->is_copy) {
- if (phase == 1)
- create_file(patch);
- return;
- }
- /*
- * Rename or modification boils down to the same
- * thing: remove the old, write the new
- */
- if (phase == 0)
- remove_file(patch, patch->is_rename);
- if (phase == 1)
- create_file(patch);
-}
-
-static int write_out_one_reject(struct patch *patch)
-{
- FILE *rej;
- char namebuf[PATH_MAX];
- struct fragment *frag;
- int cnt = 0;
-
- for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
- if (!frag->rejected)
- continue;
- cnt++;
- }
-
- if (!cnt) {
- if (apply_verbosely)
- say_patch_name(stderr,
- "Applied patch ", patch, " cleanly.\n");
- return 0;
- }
-
- /* This should not happen, because a removal patch that leaves
- * contents are marked "rejected" at the patch level.
- */
- if (!patch->new_name)
- die("internal error");
-
- /* Say this even without --verbose */
- say_patch_name(stderr, "Applying patch ", patch, " with");
- fprintf(stderr, " %d rejects...\n", cnt);
-
- cnt = strlen(patch->new_name);
- if (ARRAY_SIZE(namebuf) <= cnt + 5) {
- cnt = ARRAY_SIZE(namebuf) - 5;
- warning("truncating .rej filename to %.*s.rej",
- cnt - 1, patch->new_name);
- }
- memcpy(namebuf, patch->new_name, cnt);
- memcpy(namebuf + cnt, ".rej", 5);
-
- rej = fopen(namebuf, "w");
- if (!rej)
- return error("cannot open %s: %s", namebuf, strerror(errno));
-
- /* Normal git tools never deal with .rej, so do not pretend
- * this is a git patch by saying --git nor give extended
- * headers. While at it, maybe please "kompare" that wants
- * the trailing TAB and some garbage at the end of line ;-).
- */
- fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
- patch->new_name, patch->new_name);
- for (cnt = 1, frag = patch->fragments;
- frag;
- cnt++, frag = frag->next) {
- if (!frag->rejected) {
- fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
- continue;
- }
- fprintf(stderr, "Rejected hunk #%d.\n", cnt);
- fprintf(rej, "%.*s", frag->size, frag->patch);
- if (frag->patch[frag->size-1] != '\n')
- fputc('\n', rej);
- }
- fclose(rej);
- return -1;
-}
-
-static int write_out_results(struct patch *list, int skipped_patch)
-{
- int phase;
- int errs = 0;
- struct patch *l;
-
- if (!list && !skipped_patch)
- return error("No changes");
-
- for (phase = 0; phase < 2; phase++) {
- l = list;
- while (l) {
- if (l->rejected)
- errs = 1;
- else {
- write_out_one_result(l, phase);
- if (phase == 1 && write_out_one_reject(l))
- errs = 1;
- }
- l = l->next;
- }
- }
- return errs;
-}
-
-static struct lock_file lock_file;
-
-static struct string_list limit_by_name;
-static int has_include;
-static void add_name_limit(const char *name, int exclude)
-{
- struct string_list_item *it;
-
- it = string_list_append(name, &limit_by_name);
- it->util = exclude ? NULL : (void *) 1;
-}
-
-static int use_patch(struct patch *p)
-{
- const char *pathname = p->new_name ? p->new_name : p->old_name;
- int i;
-
- /* Paths outside are not touched regardless of "--include" */
- if (0 < prefix_length) {
- int pathlen = strlen(pathname);
- if (pathlen <= prefix_length ||
- memcmp(prefix, pathname, prefix_length))
- return 0;
- }
-
- /* See if it matches any of exclude/include rule */
- for (i = 0; i < limit_by_name.nr; i++) {
- struct string_list_item *it = &limit_by_name.items[i];
- if (!fnmatch(it->string, pathname, 0))
- return (it->util != NULL);
- }
-
- /*
- * If we had any include, a path that does not match any rule is
- * not used. Otherwise, we saw bunch of exclude rules (or none)
- * and such a path is used.
- */
- return !has_include;
-}
-
-
-static void prefix_one(char **name)
-{
- char *old_name = *name;
- if (!old_name)
- return;
- *name = xstrdup(prefix_filename(prefix, prefix_length, *name));
- free(old_name);
-}
-
-static void prefix_patches(struct patch *p)
-{
- if (!prefix || p->is_toplevel_relative)
- return;
- for ( ; p; p = p->next) {
- if (p->new_name == p->old_name) {
- char *prefixed = p->new_name;
- prefix_one(&prefixed);
- p->new_name = p->old_name = prefixed;
- }
- else {
- prefix_one(&p->new_name);
- prefix_one(&p->old_name);
- }
- }
-}
-
-#define INACCURATE_EOF (1<<0)
-#define RECOUNT (1<<1)
-
-static int apply_patch(int fd, const char *filename, int options)
-{
- size_t offset;
- struct strbuf buf = STRBUF_INIT;
- struct patch *list = NULL, **listp = &list;
- int skipped_patch = 0;
-
- /* FIXME - memory leak when using multiple patch files as inputs */
- memset(&fn_table, 0, sizeof(struct string_list));
- patch_input_file = filename;
- read_patch_file(&buf, fd);
- offset = 0;
- while (offset < buf.len) {
- struct patch *patch;
- int nr;
-
- patch = xcalloc(1, sizeof(*patch));
- patch->inaccurate_eof = !!(options & INACCURATE_EOF);
- patch->recount = !!(options & RECOUNT);
- nr = parse_chunk(buf.buf + offset, buf.len - offset, patch);
- if (nr < 0)
- break;
- if (apply_in_reverse)
- reverse_patches(patch);
- if (prefix)
- prefix_patches(patch);
- if (use_patch(patch)) {
- patch_stats(patch);
- *listp = patch;
- listp = &patch->next;
- }
- else {
- /* perhaps free it a bit better? */
- free(patch);
- skipped_patch++;
- }
- offset += nr;
- }
-
- if (whitespace_error && (ws_error_action == die_on_ws_error))
- apply = 0;
-
- update_index = check_index && apply;
- if (update_index && newfd < 0)
- newfd = hold_locked_index(&lock_file, 1);
-
- if (check_index) {
- if (read_cache() < 0)
- die("unable to read index file");
- }
-
- if ((check || apply) &&
- check_patch_list(list) < 0 &&
- !apply_with_reject)
- exit(1);
-
- if (apply && write_out_results(list, skipped_patch))
- exit(1);
-
- if (fake_ancestor)
- build_fake_ancestor(list, fake_ancestor);
-
- if (diffstat)
- stat_patch_list(list);
-
- if (numstat)
- numstat_patch_list(list);
-
- if (summary)
- summary_patch_list(list);
-
- strbuf_release(&buf);
- return 0;
-}
-
-static int git_apply_config(const char *var, const char *value, void *cb)
-{
- if (!strcmp(var, "apply.whitespace"))
- return git_config_string(&apply_default_whitespace, var, value);
- else if (!strcmp(var, "apply.ignorewhitespace"))
- return git_config_string(&apply_default_ignorewhitespace, var, value);
- return git_default_config(var, value, cb);
-}
-
-static int option_parse_exclude(const struct option *opt,
- const char *arg, int unset)
-{
- add_name_limit(arg, 1);
- return 0;
-}
-
-static int option_parse_include(const struct option *opt,
- const char *arg, int unset)
-{
- add_name_limit(arg, 0);
- has_include = 1;
- return 0;
-}
-
-static int option_parse_p(const struct option *opt,
- const char *arg, int unset)
-{
- p_value = atoi(arg);
- p_value_known = 1;
- return 0;
-}
-
-static int option_parse_z(const struct option *opt,
- const char *arg, int unset)
-{
- if (unset)
- line_termination = '\n';
- else
- line_termination = 0;
- return 0;
-}
-
-static int option_parse_space_change(const struct option *opt,
- const char *arg, int unset)
-{
- if (unset)
- ws_ignore_action = ignore_ws_none;
- else
- ws_ignore_action = ignore_ws_change;
- return 0;
-}
-
-static int option_parse_whitespace(const struct option *opt,
- const char *arg, int unset)
-{
- const char **whitespace_option = opt->value;
-
- *whitespace_option = arg;
- parse_whitespace_option(arg);
- return 0;
-}
-
-static int option_parse_directory(const struct option *opt,
- const char *arg, int unset)
-{
- root_len = strlen(arg);
- if (root_len && arg[root_len - 1] != '/') {
- char *new_root;
- root = new_root = xmalloc(root_len + 2);
- strcpy(new_root, arg);
- strcpy(new_root + root_len++, "/");
- } else
- root = arg;
- return 0;
-}
-
-int cmd_apply(int argc, const char **argv, const char *unused_prefix)
-{
- int i;
- int errs = 0;
- int is_not_gitdir;
- int binary;
- int force_apply = 0;
-
- const char *whitespace_option = NULL;
-
- struct option builtin_apply_options[] = {
- { OPTION_CALLBACK, 0, "exclude", NULL, "path",
- "don't apply changes matching the given path",
- 0, option_parse_exclude },
- { OPTION_CALLBACK, 0, "include", NULL, "path",
- "apply changes matching the given path",
- 0, option_parse_include },
- { OPTION_CALLBACK, 'p', NULL, NULL, "num",
- "remove <num> leading slashes from traditional diff paths",
- 0, option_parse_p },
- OPT_BOOLEAN(0, "no-add", &no_add,
- "ignore additions made by the patch"),
- OPT_BOOLEAN(0, "stat", &diffstat,
- "instead of applying the patch, output diffstat for the input"),
- { OPTION_BOOLEAN, 0, "allow-binary-replacement", &binary,
- NULL, "old option, now no-op",
- PARSE_OPT_HIDDEN | PARSE_OPT_NOARG },
- { OPTION_BOOLEAN, 0, "binary", &binary,
- NULL, "old option, now no-op",
- PARSE_OPT_HIDDEN | PARSE_OPT_NOARG },
- OPT_BOOLEAN(0, "numstat", &numstat,
- "shows number of added and deleted lines in decimal notation"),
- OPT_BOOLEAN(0, "summary", &summary,
- "instead of applying the patch, output a summary for the input"),
- OPT_BOOLEAN(0, "check", &check,
- "instead of applying the patch, see if the patch is applicable"),
- OPT_BOOLEAN(0, "index", &check_index,
- "make sure the patch is applicable to the current index"),
- OPT_BOOLEAN(0, "cached", &cached,
- "apply a patch without touching the working tree"),
- OPT_BOOLEAN(0, "apply", &force_apply,
- "also apply the patch (use with --stat/--summary/--check)"),
- OPT_FILENAME(0, "build-fake-ancestor", &fake_ancestor,
- "build a temporary index based on embedded index information"),
- { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
- "paths are separated with NUL character",
- PARSE_OPT_NOARG, option_parse_z },
- OPT_INTEGER('C', NULL, &p_context,
- "ensure at least <n> lines of context match"),
- { OPTION_CALLBACK, 0, "whitespace", &whitespace_option, "action",
- "detect new or modified lines that have whitespace errors",
- 0, option_parse_whitespace },
- { OPTION_CALLBACK, 0, "ignore-space-change", NULL, NULL,
- "ignore changes in whitespace when finding context",
- PARSE_OPT_NOARG, option_parse_space_change },
- { OPTION_CALLBACK, 0, "ignore-whitespace", NULL, NULL,
- "ignore changes in whitespace when finding context",
- PARSE_OPT_NOARG, option_parse_space_change },
- OPT_BOOLEAN('R', "reverse", &apply_in_reverse,
- "apply the patch in reverse"),
- OPT_BOOLEAN(0, "unidiff-zero", &unidiff_zero,
- "don't expect at least one line of context"),
- OPT_BOOLEAN(0, "reject", &apply_with_reject,
- "leave the rejected hunks in corresponding *.rej files"),
- OPT__VERBOSE(&apply_verbosely),
- OPT_BIT(0, "inaccurate-eof", &options,
- "tolerate incorrectly detected missing new-line at the end of file",
- INACCURATE_EOF),
- OPT_BIT(0, "recount", &options,
- "do not trust the line counts in the hunk headers",
- RECOUNT),
- { OPTION_CALLBACK, 0, "directory", NULL, "root",
- "prepend <root> to all filenames",
- 0, option_parse_directory },
- OPT_END()
- };
-
- prefix = setup_git_directory_gently(&is_not_gitdir);
- prefix_length = prefix ? strlen(prefix) : 0;
- git_config(git_apply_config, NULL);
- if (apply_default_whitespace)
- parse_whitespace_option(apply_default_whitespace);
- if (apply_default_ignorewhitespace)
- parse_ignorewhitespace_option(apply_default_ignorewhitespace);
-
- argc = parse_options(argc, argv, prefix, builtin_apply_options,
- apply_usage, 0);
-
- if (apply_with_reject)
- apply = apply_verbosely = 1;
- if (!force_apply && (diffstat || numstat || summary || check || fake_ancestor))
- apply = 0;
- if (check_index && is_not_gitdir)
- die("--index outside a repository");
- if (cached) {
- if (is_not_gitdir)
- die("--cached outside a repository");
- check_index = 1;
- }
- for (i = 0; i < argc; i++) {
- const char *arg = argv[i];
- int fd;
-
- if (!strcmp(arg, "-")) {
- errs |= apply_patch(0, "<stdin>", options);
- read_stdin = 0;
- continue;
- } else if (0 < prefix_length)
- arg = prefix_filename(prefix, prefix_length, arg);
-
- fd = open(arg, O_RDONLY);
- if (fd < 0)
- die_errno("can't open patch '%s'", arg);
- read_stdin = 0;
- set_default_whitespace_mode(whitespace_option);
- errs |= apply_patch(fd, arg, options);
- close(fd);
- }
- set_default_whitespace_mode(whitespace_option);
- if (read_stdin)
- errs |= apply_patch(0, "<stdin>", options);
- if (whitespace_error) {
- if (squelch_whitespace_errors &&
- squelch_whitespace_errors < whitespace_error) {
- int squelched =
- whitespace_error - squelch_whitespace_errors;
- warning("squelched %d "
- "whitespace error%s",
- squelched,
- squelched == 1 ? "" : "s");
- }
- if (ws_error_action == die_on_ws_error)
- die("%d line%s add%s whitespace errors.",
- whitespace_error,
- whitespace_error == 1 ? "" : "s",
- whitespace_error == 1 ? "s" : "");
- if (applied_after_fixing_ws && apply)
- warning("%d line%s applied after"
- " fixing whitespace errors.",
- applied_after_fixing_ws,
- applied_after_fixing_ws == 1 ? "" : "s");
- else if (whitespace_error)
- warning("%d line%s add%s whitespace errors.",
- whitespace_error,
- whitespace_error == 1 ? "" : "s",
- whitespace_error == 1 ? "s" : "");
- }
-
- if (update_index) {
- if (write_cache(newfd, active_cache, active_nr) ||
- commit_locked_index(&lock_file))
- die("Unable to write new index file");
- }
-
- return !!errs;
-}