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authorJunio C Hamano <gitster@pobox.com>2011-11-10 17:10:51 (GMT)
committerJunio C Hamano <gitster@pobox.com>2011-11-10 17:10:51 (GMT)
commitc444c16589f95ac22d8e3ffe603cd7f0613512ce (patch)
tree31d2e0c2a77344201af6f3ee5427f47218dec9bb /builtin/mktree.c
parent77f143bf3e218857ec8e5244d7e862e8e0c1a041 (diff)
parent81b50f3ce40bfdd66e5d967bf82be001039a9a98 (diff)
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Merge "Move 'builtin-*' into a 'builtin/' subdirectory"
Diffstat (limited to 'builtin/mktree.c')
-rw-r--r--builtin/mktree.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/builtin/mktree.c b/builtin/mktree.c
new file mode 100644
index 0000000..4ae1c41
--- /dev/null
+++ b/builtin/mktree.c
@@ -0,0 +1,191 @@
+/*
+ * GIT - the stupid content tracker
+ *
+ * Copyright (c) Junio C Hamano, 2006, 2009
+ */
+#include "builtin.h"
+#include "quote.h"
+#include "tree.h"
+#include "parse-options.h"
+
+static struct treeent {
+ unsigned mode;
+ unsigned char sha1[20];
+ int len;
+ char name[FLEX_ARRAY];
+} **entries;
+static int alloc, used;
+
+static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
+{
+ struct treeent *ent;
+ int len = strlen(path);
+ if (strchr(path, '/'))
+ die("path %s contains slash", path);
+
+ if (alloc <= used) {
+ alloc = alloc_nr(used);
+ entries = xrealloc(entries, sizeof(*entries) * alloc);
+ }
+ ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
+ ent->mode = mode;
+ ent->len = len;
+ hashcpy(ent->sha1, sha1);
+ memcpy(ent->name, path, len+1);
+}
+
+static int ent_compare(const void *a_, const void *b_)
+{
+ struct treeent *a = *(struct treeent **)a_;
+ struct treeent *b = *(struct treeent **)b_;
+ return base_name_compare(a->name, a->len, a->mode,
+ b->name, b->len, b->mode);
+}
+
+static void write_tree(unsigned char *sha1)
+{
+ struct strbuf buf;
+ size_t size;
+ int i;
+
+ qsort(entries, used, sizeof(*entries), ent_compare);
+ for (size = i = 0; i < used; i++)
+ size += 32 + entries[i]->len;
+
+ strbuf_init(&buf, size);
+ for (i = 0; i < used; i++) {
+ struct treeent *ent = entries[i];
+ strbuf_addf(&buf, "%o %s%c", ent->mode, ent->name, '\0');
+ strbuf_add(&buf, ent->sha1, 20);
+ }
+
+ write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+ strbuf_release(&buf);
+}
+
+static const char *mktree_usage[] = {
+ "git mktree [-z] [--missing] [--batch]",
+ NULL
+};
+
+static void mktree_line(char *buf, size_t len, int line_termination, int allow_missing)
+{
+ char *ptr, *ntr;
+ unsigned mode;
+ enum object_type mode_type; /* object type derived from mode */
+ enum object_type obj_type; /* object type derived from sha */
+ char *path;
+ unsigned char sha1[20];
+
+ ptr = buf;
+ /*
+ * Read non-recursive ls-tree output format:
+ * mode SP type SP sha1 TAB name
+ */
+ mode = strtoul(ptr, &ntr, 8);
+ if (ptr == ntr || !ntr || *ntr != ' ')
+ die("input format error: %s", buf);
+ ptr = ntr + 1; /* type */
+ ntr = strchr(ptr, ' ');
+ if (!ntr || buf + len <= ntr + 40 ||
+ ntr[41] != '\t' ||
+ get_sha1_hex(ntr + 1, sha1))
+ die("input format error: %s", buf);
+
+ /* It is perfectly normal if we do not have a commit from a submodule */
+ if (S_ISGITLINK(mode))
+ allow_missing = 1;
+
+
+ *ntr++ = 0; /* now at the beginning of SHA1 */
+
+ path = ntr + 41; /* at the beginning of name */
+ if (line_termination && path[0] == '"') {
+ struct strbuf p_uq = STRBUF_INIT;
+ if (unquote_c_style(&p_uq, path, NULL))
+ die("invalid quoting");
+ path = strbuf_detach(&p_uq, NULL);
+ }
+
+ /*
+ * Object type is redundantly derivable three ways.
+ * These should all agree.
+ */
+ mode_type = object_type(mode);
+ if (mode_type != type_from_string(ptr)) {
+ die("entry '%s' object type (%s) doesn't match mode type (%s)",
+ path, ptr, typename(mode_type));
+ }
+
+ /* Check the type of object identified by sha1 */
+ obj_type = sha1_object_info(sha1, NULL);
+ if (obj_type < 0) {
+ if (allow_missing) {
+ ; /* no problem - missing objects are presumed to be of the right type */
+ } else {
+ die("entry '%s' object %s is unavailable", path, sha1_to_hex(sha1));
+ }
+ } else {
+ if (obj_type != mode_type) {
+ /*
+ * The object exists but is of the wrong type.
+ * This is a problem regardless of allow_missing
+ * because the new tree entry will never be correct.
+ */
+ die("entry '%s' object %s is a %s but specified type was (%s)",
+ path, sha1_to_hex(sha1), typename(obj_type), typename(mode_type));
+ }
+ }
+
+ append_to_tree(mode, sha1, path);
+}
+
+int cmd_mktree(int ac, const char **av, const char *prefix)
+{
+ struct strbuf sb = STRBUF_INIT;
+ unsigned char sha1[20];
+ int line_termination = '\n';
+ int allow_missing = 0;
+ int is_batch_mode = 0;
+ int got_eof = 0;
+
+ const struct option option[] = {
+ OPT_SET_INT('z', NULL, &line_termination, "input is NUL terminated", '\0'),
+ OPT_SET_INT( 0 , "missing", &allow_missing, "allow missing objects", 1),
+ OPT_SET_INT( 0 , "batch", &is_batch_mode, "allow creation of more than one tree", 1),
+ OPT_END()
+ };
+
+ ac = parse_options(ac, av, prefix, option, mktree_usage, 0);
+
+ while (!got_eof) {
+ while (1) {
+ if (strbuf_getline(&sb, stdin, line_termination) == EOF) {
+ got_eof = 1;
+ break;
+ }
+ if (sb.buf[0] == '\0') {
+ /* empty lines denote tree boundaries in batch mode */
+ if (is_batch_mode)
+ break;
+ die("input format error: (blank line only valid in batch mode)");
+ }
+ mktree_line(sb.buf, sb.len, line_termination, allow_missing);
+ }
+ if (is_batch_mode && got_eof && used < 1) {
+ /*
+ * Execution gets here if the last tree entry is terminated with a
+ * new-line. The final new-line has been made optional to be
+ * consistent with the original non-batch behaviour of mktree.
+ */
+ ; /* skip creating an empty tree */
+ } else {
+ write_tree(sha1);
+ puts(sha1_to_hex(sha1));
+ fflush(stdout);
+ }
+ used=0; /* reset tree entry buffer for re-use in batch mode */
+ }
+ strbuf_release(&sb);
+ exit(0);
+}