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-rw-r--r--config.c1210
1 files changed, 1210 insertions, 0 deletions
diff --git a/config.c b/config.c
new file mode 100644
index 0000000..b8d289d
--- /dev/null
+++ b/config.c
@@ -0,0 +1,1210 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ * Copyright (C) Johannes Schindelin, 2005
+ *
+ */
+#include "cache.h"
+#include "exec_cmd.h"
+
+#define MAXNAME (256)
+
+static FILE *config_file;
+static const char *config_file_name;
+static int config_linenr;
+static int config_file_eof;
+static int zlib_compression_seen;
+
+const char *config_exclusive_filename = NULL;
+
+static int get_next_char(void)
+{
+ int c;
+ FILE *f;
+
+ c = '\n';
+ if ((f = config_file) != NULL) {
+ c = fgetc(f);
+ if (c == '\r') {
+ /* DOS like systems */
+ c = fgetc(f);
+ if (c != '\n') {
+ ungetc(c, f);
+ c = '\r';
+ }
+ }
+ if (c == '\n')
+ config_linenr++;
+ if (c == EOF) {
+ config_file_eof = 1;
+ c = '\n';
+ }
+ }
+ return c;
+}
+
+static char *parse_value(void)
+{
+ static char value[1024];
+ int quote = 0, comment = 0, len = 0, space = 0;
+
+ for (;;) {
+ int c = get_next_char();
+ if (len >= sizeof(value))
+ return NULL;
+ if (c == '\n') {
+ if (quote)
+ return NULL;
+ value[len] = 0;
+ return value;
+ }
+ if (comment)
+ continue;
+ if (isspace(c) && !quote) {
+ space = 1;
+ continue;
+ }
+ if (!quote) {
+ if (c == ';' || c == '#') {
+ comment = 1;
+ continue;
+ }
+ }
+ if (space) {
+ if (len)
+ value[len++] = ' ';
+ space = 0;
+ }
+ if (c == '\\') {
+ c = get_next_char();
+ switch (c) {
+ case '\n':
+ continue;
+ case 't':
+ c = '\t';
+ break;
+ case 'b':
+ c = '\b';
+ break;
+ case 'n':
+ c = '\n';
+ break;
+ /* Some characters escape as themselves */
+ case '\\': case '"':
+ break;
+ /* Reject unknown escape sequences */
+ default:
+ return NULL;
+ }
+ value[len++] = c;
+ continue;
+ }
+ if (c == '"') {
+ quote = 1-quote;
+ continue;
+ }
+ value[len++] = c;
+ }
+}
+
+static inline int iskeychar(int c)
+{
+ return isalnum(c) || c == '-';
+}
+
+static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
+{
+ int c;
+ char *value;
+
+ /* Get the full name */
+ for (;;) {
+ c = get_next_char();
+ if (config_file_eof)
+ break;
+ if (!iskeychar(c))
+ break;
+ name[len++] = tolower(c);
+ if (len >= MAXNAME)
+ return -1;
+ }
+ name[len] = 0;
+ while (c == ' ' || c == '\t')
+ c = get_next_char();
+
+ value = NULL;
+ if (c != '\n') {
+ if (c != '=')
+ return -1;
+ value = parse_value();
+ if (!value)
+ return -1;
+ }
+ return fn(name, value, data);
+}
+
+static int get_extended_base_var(char *name, int baselen, int c)
+{
+ do {
+ if (c == '\n')
+ return -1;
+ c = get_next_char();
+ } while (isspace(c));
+
+ /* We require the format to be '[base "extension"]' */
+ if (c != '"')
+ return -1;
+ name[baselen++] = '.';
+
+ for (;;) {
+ int c = get_next_char();
+ if (c == '\n')
+ return -1;
+ if (c == '"')
+ break;
+ if (c == '\\') {
+ c = get_next_char();
+ if (c == '\n')
+ return -1;
+ }
+ name[baselen++] = c;
+ if (baselen > MAXNAME / 2)
+ return -1;
+ }
+
+ /* Final ']' */
+ if (get_next_char() != ']')
+ return -1;
+ return baselen;
+}
+
+static int get_base_var(char *name)
+{
+ int baselen = 0;
+
+ for (;;) {
+ int c = get_next_char();
+ if (config_file_eof)
+ return -1;
+ if (c == ']')
+ return baselen;
+ if (isspace(c))
+ return get_extended_base_var(name, baselen, c);
+ if (!iskeychar(c) && c != '.')
+ return -1;
+ if (baselen > MAXNAME / 2)
+ return -1;
+ name[baselen++] = tolower(c);
+ }
+}
+
+static int git_parse_file(config_fn_t fn, void *data)
+{
+ int comment = 0;
+ int baselen = 0;
+ static char var[MAXNAME];
+
+ /* U+FEFF Byte Order Mark in UTF8 */
+ static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
+ const unsigned char *bomptr = utf8_bom;
+
+ for (;;) {
+ int c = get_next_char();
+ if (bomptr && *bomptr) {
+ /* We are at the file beginning; skip UTF8-encoded BOM
+ * if present. Sane editors won't put this in on their
+ * own, but e.g. Windows Notepad will do it happily. */
+ if ((unsigned char) c == *bomptr) {
+ bomptr++;
+ continue;
+ } else {
+ /* Do not tolerate partial BOM. */
+ if (bomptr != utf8_bom)
+ break;
+ /* No BOM at file beginning. Cool. */
+ bomptr = NULL;
+ }
+ }
+ if (c == '\n') {
+ if (config_file_eof)
+ return 0;
+ comment = 0;
+ continue;
+ }
+ if (comment || isspace(c))
+ continue;
+ if (c == '#' || c == ';') {
+ comment = 1;
+ continue;
+ }
+ if (c == '[') {
+ baselen = get_base_var(var);
+ if (baselen <= 0)
+ break;
+ var[baselen++] = '.';
+ var[baselen] = 0;
+ continue;
+ }
+ if (!isalpha(c))
+ break;
+ var[baselen] = tolower(c);
+ if (get_value(fn, data, var, baselen+1) < 0)
+ break;
+ }
+ die("bad config file line %d in %s", config_linenr, config_file_name);
+}
+
+static int parse_unit_factor(const char *end, unsigned long *val)
+{
+ if (!*end)
+ return 1;
+ else if (!strcasecmp(end, "k")) {
+ *val *= 1024;
+ return 1;
+ }
+ else if (!strcasecmp(end, "m")) {
+ *val *= 1024 * 1024;
+ return 1;
+ }
+ else if (!strcasecmp(end, "g")) {
+ *val *= 1024 * 1024 * 1024;
+ return 1;
+ }
+ return 0;
+}
+
+static int git_parse_long(const char *value, long *ret)
+{
+ if (value && *value) {
+ char *end;
+ long val = strtol(value, &end, 0);
+ unsigned long factor = 1;
+ if (!parse_unit_factor(end, &factor))
+ return 0;
+ *ret = val * factor;
+ return 1;
+ }
+ return 0;
+}
+
+int git_parse_ulong(const char *value, unsigned long *ret)
+{
+ if (value && *value) {
+ char *end;
+ unsigned long val = strtoul(value, &end, 0);
+ if (!parse_unit_factor(end, &val))
+ return 0;
+ *ret = val;
+ return 1;
+ }
+ return 0;
+}
+
+static void die_bad_config(const char *name)
+{
+ if (config_file_name)
+ die("bad config value for '%s' in %s", name, config_file_name);
+ die("bad config value for '%s'", name);
+}
+
+int git_config_int(const char *name, const char *value)
+{
+ long ret = 0;
+ if (!git_parse_long(value, &ret))
+ die_bad_config(name);
+ return ret;
+}
+
+unsigned long git_config_ulong(const char *name, const char *value)
+{
+ unsigned long ret;
+ if (!git_parse_ulong(value, &ret))
+ die_bad_config(name);
+ return ret;
+}
+
+int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
+{
+ *is_bool = 1;
+ if (!value)
+ return 1;
+ if (!*value)
+ return 0;
+ if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
+ return 1;
+ if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
+ return 0;
+ *is_bool = 0;
+ return git_config_int(name, value);
+}
+
+int git_config_bool(const char *name, const char *value)
+{
+ int discard;
+ return !!git_config_bool_or_int(name, value, &discard);
+}
+
+int git_config_string(const char **dest, const char *var, const char *value)
+{
+ if (!value)
+ return config_error_nonbool(var);
+ *dest = xstrdup(value);
+ return 0;
+}
+
+static int git_default_core_config(const char *var, const char *value)
+{
+ /* This needs a better name */
+ if (!strcmp(var, "core.filemode")) {
+ trust_executable_bit = git_config_bool(var, value);
+ return 0;
+ }
+ if (!strcmp(var, "core.trustctime")) {
+ trust_ctime = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.quotepath")) {
+ quote_path_fully = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.symlinks")) {
+ has_symlinks = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.ignorecase")) {
+ ignore_case = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.bare")) {
+ is_bare_repository_cfg = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.ignorestat")) {
+ assume_unchanged = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.prefersymlinkrefs")) {
+ prefer_symlink_refs = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.logallrefupdates")) {
+ log_all_ref_updates = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.warnambiguousrefs")) {
+ warn_ambiguous_refs = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.loosecompression")) {
+ int level = git_config_int(var, value);
+ if (level == -1)
+ level = Z_DEFAULT_COMPRESSION;
+ else if (level < 0 || level > Z_BEST_COMPRESSION)
+ die("bad zlib compression level %d", level);
+ zlib_compression_level = level;
+ zlib_compression_seen = 1;
+ return 0;
+ }
+
+ if (!strcmp(var, "core.compression")) {
+ int level = git_config_int(var, value);
+ if (level == -1)
+ level = Z_DEFAULT_COMPRESSION;
+ else if (level < 0 || level > Z_BEST_COMPRESSION)
+ die("bad zlib compression level %d", level);
+ core_compression_level = level;
+ core_compression_seen = 1;
+ if (!zlib_compression_seen)
+ zlib_compression_level = level;
+ return 0;
+ }
+
+ if (!strcmp(var, "core.packedgitwindowsize")) {
+ int pgsz_x2 = getpagesize() * 2;
+ packed_git_window_size = git_config_int(var, value);
+
+ /* This value must be multiple of (pagesize * 2) */
+ packed_git_window_size /= pgsz_x2;
+ if (packed_git_window_size < 1)
+ packed_git_window_size = 1;
+ packed_git_window_size *= pgsz_x2;
+ return 0;
+ }
+
+ if (!strcmp(var, "core.packedgitlimit")) {
+ packed_git_limit = git_config_int(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.deltabasecachelimit")) {
+ delta_base_cache_limit = git_config_int(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.autocrlf")) {
+ if (value && !strcasecmp(value, "input")) {
+ auto_crlf = -1;
+ return 0;
+ }
+ auto_crlf = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.safecrlf")) {
+ if (value && !strcasecmp(value, "warn")) {
+ safe_crlf = SAFE_CRLF_WARN;
+ return 0;
+ }
+ safe_crlf = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.pager"))
+ return git_config_string(&pager_program, var, value);
+
+ if (!strcmp(var, "core.editor"))
+ return git_config_string(&editor_program, var, value);
+
+ if (!strcmp(var, "core.excludesfile"))
+ return git_config_string(&excludes_file, var, value);
+
+ if (!strcmp(var, "core.whitespace")) {
+ if (!value)
+ return config_error_nonbool(var);
+ whitespace_rule_cfg = parse_whitespace_rule(value);
+ return 0;
+ }
+
+ if (!strcmp(var, "core.fsyncobjectfiles")) {
+ fsync_object_files = git_config_bool(var, value);
+ return 0;
+ }
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+static int git_default_user_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "user.name")) {
+ if (!value)
+ return config_error_nonbool(var);
+ strlcpy(git_default_name, value, sizeof(git_default_name));
+ if (git_default_email[0])
+ user_ident_explicitly_given = 1;
+ return 0;
+ }
+
+ if (!strcmp(var, "user.email")) {
+ if (!value)
+ return config_error_nonbool(var);
+ strlcpy(git_default_email, value, sizeof(git_default_email));
+ if (git_default_name[0])
+ user_ident_explicitly_given = 1;
+ return 0;
+ }
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+static int git_default_i18n_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "i18n.commitencoding"))
+ return git_config_string(&git_commit_encoding, var, value);
+
+ if (!strcmp(var, "i18n.logoutputencoding"))
+ return git_config_string(&git_log_output_encoding, var, value);
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+static int git_default_branch_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "branch.autosetupmerge")) {
+ if (value && !strcasecmp(value, "always")) {
+ git_branch_track = BRANCH_TRACK_ALWAYS;
+ return 0;
+ }
+ git_branch_track = git_config_bool(var, value);
+ return 0;
+ }
+ if (!strcmp(var, "branch.autosetuprebase")) {
+ if (!value)
+ return config_error_nonbool(var);
+ else if (!strcmp(value, "never"))
+ autorebase = AUTOREBASE_NEVER;
+ else if (!strcmp(value, "local"))
+ autorebase = AUTOREBASE_LOCAL;
+ else if (!strcmp(value, "remote"))
+ autorebase = AUTOREBASE_REMOTE;
+ else if (!strcmp(value, "always"))
+ autorebase = AUTOREBASE_ALWAYS;
+ else
+ return error("Malformed value for %s", var);
+ return 0;
+ }
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+int git_default_config(const char *var, const char *value, void *dummy)
+{
+ if (!prefixcmp(var, "core."))
+ return git_default_core_config(var, value);
+
+ if (!prefixcmp(var, "user."))
+ return git_default_user_config(var, value);
+
+ if (!prefixcmp(var, "i18n."))
+ return git_default_i18n_config(var, value);
+
+ if (!prefixcmp(var, "branch."))
+ return git_default_branch_config(var, value);
+
+ if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
+ pager_use_color = git_config_bool(var,value);
+ return 0;
+ }
+
+ /* Add other config variables here and to Documentation/config.txt. */
+ return 0;
+}
+
+int git_config_from_file(config_fn_t fn, const char *filename, void *data)
+{
+ int ret;
+ FILE *f = fopen(filename, "r");
+
+ ret = -1;
+ if (f) {
+ config_file = f;
+ config_file_name = filename;
+ config_linenr = 1;
+ config_file_eof = 0;
+ ret = git_parse_file(fn, data);
+ fclose(f);
+ config_file_name = NULL;
+ }
+ return ret;
+}
+
+const char *git_etc_gitconfig(void)
+{
+ static const char *system_wide;
+ if (!system_wide)
+ system_wide = system_path(ETC_GITCONFIG);
+ return system_wide;
+}
+
+static int git_env_bool(const char *k, int def)
+{
+ const char *v = getenv(k);
+ return v ? git_config_bool(k, v) : def;
+}
+
+int git_config_system(void)
+{
+ return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
+}
+
+int git_config_global(void)
+{
+ return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
+}
+
+int git_config(config_fn_t fn, void *data)
+{
+ int ret = 0;
+ char *repo_config = NULL;
+ const char *home = NULL;
+
+ /* $GIT_CONFIG makes git read _only_ the given config file,
+ * $GIT_CONFIG_LOCAL will make it process it in addition to the
+ * global config file, the same way it would the per-repository
+ * config file otherwise. */
+ if (config_exclusive_filename)
+ return git_config_from_file(fn, config_exclusive_filename, data);
+ if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
+ ret += git_config_from_file(fn, git_etc_gitconfig(),
+ data);
+
+ home = getenv("HOME");
+ if (git_config_global() && home) {
+ char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
+ if (!access(user_config, R_OK))
+ ret += git_config_from_file(fn, user_config, data);
+ free(user_config);
+ }
+
+ repo_config = xstrdup(git_path("config"));
+ ret += git_config_from_file(fn, repo_config, data);
+ free(repo_config);
+ return ret;
+}
+
+/*
+ * Find all the stuff for git_config_set() below.
+ */
+
+#define MAX_MATCHES 512
+
+static struct {
+ int baselen;
+ char* key;
+ int do_not_match;
+ regex_t* value_regex;
+ int multi_replace;
+ size_t offset[MAX_MATCHES];
+ enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
+ int seen;
+} store;
+
+static int matches(const char* key, const char* value)
+{
+ return !strcmp(key, store.key) &&
+ (store.value_regex == NULL ||
+ (store.do_not_match ^
+ !regexec(store.value_regex, value, 0, NULL, 0)));
+}
+
+static int store_aux(const char* key, const char* value, void *cb)
+{
+ const char *ep;
+ size_t section_len;
+
+ switch (store.state) {
+ case KEY_SEEN:
+ if (matches(key, value)) {
+ if (store.seen == 1 && store.multi_replace == 0) {
+ warning("%s has multiple values", key);
+ } else if (store.seen >= MAX_MATCHES) {
+ error("too many matches for %s", key);
+ return 1;
+ }
+
+ store.offset[store.seen] = ftell(config_file);
+ store.seen++;
+ }
+ break;
+ case SECTION_SEEN:
+ /*
+ * What we are looking for is in store.key (both
+ * section and var), and its section part is baselen
+ * long. We found key (again, both section and var).
+ * We would want to know if this key is in the same
+ * section as what we are looking for. We already
+ * know we are in the same section as what should
+ * hold store.key.
+ */
+ ep = strrchr(key, '.');
+ section_len = ep - key;
+
+ if ((section_len != store.baselen) ||
+ memcmp(key, store.key, section_len+1)) {
+ store.state = SECTION_END_SEEN;
+ break;
+ }
+
+ /*
+ * Do not increment matches: this is no match, but we
+ * just made sure we are in the desired section.
+ */
+ store.offset[store.seen] = ftell(config_file);
+ /* fallthru */
+ case SECTION_END_SEEN:
+ case START:
+ if (matches(key, value)) {
+ store.offset[store.seen] = ftell(config_file);
+ store.state = KEY_SEEN;
+ store.seen++;
+ } else {
+ if (strrchr(key, '.') - key == store.baselen &&
+ !strncmp(key, store.key, store.baselen)) {
+ store.state = SECTION_SEEN;
+ store.offset[store.seen] = ftell(config_file);
+ }
+ }
+ }
+ return 0;
+}
+
+static int write_error(const char *filename)
+{
+ error("failed to write new configuration file %s", filename);
+
+ /* Same error code as "failed to rename". */
+ return 4;
+}
+
+static int store_write_section(int fd, const char* key)
+{
+ const char *dot;
+ int i, success;
+ struct strbuf sb = STRBUF_INIT;
+
+ dot = memchr(key, '.', store.baselen);
+ if (dot) {
+ strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
+ for (i = dot - key + 1; i < store.baselen; i++) {
+ if (key[i] == '"' || key[i] == '\\')
+ strbuf_addch(&sb, '\\');
+ strbuf_addch(&sb, key[i]);
+ }
+ strbuf_addstr(&sb, "\"]\n");
+ } else {
+ strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
+ }
+
+ success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+ strbuf_release(&sb);
+
+ return success;
+}
+
+static int store_write_pair(int fd, const char* key, const char* value)
+{
+ int i, success;
+ int length = strlen(key + store.baselen + 1);
+ const char *quote = "";
+ struct strbuf sb = STRBUF_INIT;
+
+ /*
+ * Check to see if the value needs to be surrounded with a dq pair.
+ * Note that problematic characters are always backslash-quoted; this
+ * check is about not losing leading or trailing SP and strings that
+ * follow beginning-of-comment characters (i.e. ';' and '#') by the
+ * configuration parser.
+ */
+ if (value[0] == ' ')
+ quote = "\"";
+ for (i = 0; value[i]; i++)
+ if (value[i] == ';' || value[i] == '#')
+ quote = "\"";
+ if (i && value[i - 1] == ' ')
+ quote = "\"";
+
+ strbuf_addf(&sb, "\t%.*s = %s",
+ length, key + store.baselen + 1, quote);
+
+ for (i = 0; value[i]; i++)
+ switch (value[i]) {
+ case '\n':
+ strbuf_addstr(&sb, "\\n");
+ break;
+ case '\t':
+ strbuf_addstr(&sb, "\\t");
+ break;
+ case '"':
+ case '\\':
+ strbuf_addch(&sb, '\\');
+ default:
+ strbuf_addch(&sb, value[i]);
+ break;
+ }
+ strbuf_addf(&sb, "%s\n", quote);
+
+ success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+ strbuf_release(&sb);
+
+ return success;
+}
+
+static ssize_t find_beginning_of_line(const char* contents, size_t size,
+ size_t offset_, int* found_bracket)
+{
+ size_t equal_offset = size, bracket_offset = size;
+ ssize_t offset;
+
+contline:
+ for (offset = offset_-2; offset > 0
+ && contents[offset] != '\n'; offset--)
+ switch (contents[offset]) {
+ case '=': equal_offset = offset; break;
+ case ']': bracket_offset = offset; break;
+ }
+ if (offset > 0 && contents[offset-1] == '\\') {
+ offset_ = offset;
+ goto contline;
+ }
+ if (bracket_offset < equal_offset) {
+ *found_bracket = 1;
+ offset = bracket_offset+1;
+ } else
+ offset++;
+
+ return offset;
+}
+
+int git_config_set(const char* key, const char* value)
+{
+ return git_config_set_multivar(key, value, NULL, 0);
+}
+
+/*
+ * If value==NULL, unset in (remove from) config,
+ * if value_regex!=NULL, disregard key/value pairs where value does not match.
+ * if multi_replace==0, nothing, or only one matching key/value is replaced,
+ * else all matching key/values (regardless how many) are removed,
+ * before the new pair is written.
+ *
+ * Returns 0 on success.
+ *
+ * This function does this:
+ *
+ * - it locks the config file by creating ".git/config.lock"
+ *
+ * - it then parses the config using store_aux() as validator to find
+ * the position on the key/value pair to replace. If it is to be unset,
+ * it must be found exactly once.
+ *
+ * - the config file is mmap()ed and the part before the match (if any) is
+ * written to the lock file, then the changed part and the rest.
+ *
+ * - the config file is removed and the lock file rename()d to it.
+ *
+ */
+int git_config_set_multivar(const char* key, const char* value,
+ const char* value_regex, int multi_replace)
+{
+ int i, dot;
+ int fd = -1, in_fd;
+ int ret;
+ char* config_filename;
+ struct lock_file *lock = NULL;
+ const char* last_dot = strrchr(key, '.');
+
+ if (config_exclusive_filename)
+ config_filename = xstrdup(config_exclusive_filename);
+ else
+ config_filename = xstrdup(git_path("config"));
+
+ /*
+ * Since "key" actually contains the section name and the real
+ * key name separated by a dot, we have to know where the dot is.
+ */
+
+ if (last_dot == NULL) {
+ error("key does not contain a section: %s", key);
+ ret = 2;
+ goto out_free;
+ }
+ store.baselen = last_dot - key;
+
+ store.multi_replace = multi_replace;
+
+ /*
+ * Validate the key and while at it, lower case it for matching.
+ */
+ store.key = xmalloc(strlen(key) + 1);
+ dot = 0;
+ for (i = 0; key[i]; i++) {
+ unsigned char c = key[i];
+ if (c == '.')
+ dot = 1;
+ /* Leave the extended basename untouched.. */
+ if (!dot || i > store.baselen) {
+ if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
+ error("invalid key: %s", key);
+ free(store.key);
+ ret = 1;
+ goto out_free;
+ }
+ c = tolower(c);
+ } else if (c == '\n') {
+ error("invalid key (newline): %s", key);
+ free(store.key);
+ ret = 1;
+ goto out_free;
+ }
+ store.key[i] = c;
+ }
+ store.key[i] = 0;
+
+ /*
+ * The lock serves a purpose in addition to locking: the new
+ * contents of .git/config will be written into it.
+ */
+ lock = xcalloc(sizeof(struct lock_file), 1);
+ fd = hold_lock_file_for_update(lock, config_filename, 0);
+ if (fd < 0) {
+ error("could not lock config file %s", config_filename);
+ free(store.key);
+ ret = -1;
+ goto out_free;
+ }
+
+ /*
+ * If .git/config does not exist yet, write a minimal version.
+ */
+ in_fd = open(config_filename, O_RDONLY);
+ if ( in_fd < 0 ) {
+ free(store.key);
+
+ if ( ENOENT != errno ) {
+ error("opening %s: %s", config_filename,
+ strerror(errno));
+ ret = 3; /* same as "invalid config file" */
+ goto out_free;
+ }
+ /* if nothing to unset, error out */
+ if (value == NULL) {
+ ret = 5;
+ goto out_free;
+ }
+
+ store.key = (char*)key;
+ if (!store_write_section(fd, key) ||
+ !store_write_pair(fd, key, value))
+ goto write_err_out;
+ } else {
+ struct stat st;
+ char* contents;
+ size_t contents_sz, copy_begin, copy_end;
+ int i, new_line = 0;
+
+ if (value_regex == NULL)
+ store.value_regex = NULL;
+ else {
+ if (value_regex[0] == '!') {
+ store.do_not_match = 1;
+ value_regex++;
+ } else
+ store.do_not_match = 0;
+
+ store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
+ if (regcomp(store.value_regex, value_regex,
+ REG_EXTENDED)) {
+ error("invalid pattern: %s", value_regex);
+ free(store.value_regex);
+ ret = 6;
+ goto out_free;
+ }
+ }
+
+ store.offset[0] = 0;
+ store.state = START;
+ store.seen = 0;
+
+ /*
+ * After this, store.offset will contain the *end* offset
+ * of the last match, or remain at 0 if no match was found.
+ * As a side effect, we make sure to transform only a valid
+ * existing config file.
+ */
+ if (git_config_from_file(store_aux, config_filename, NULL)) {
+ error("invalid config file %s", config_filename);
+ free(store.key);
+ if (store.value_regex != NULL) {
+ regfree(store.value_regex);
+ free(store.value_regex);
+ }
+ ret = 3;
+ goto out_free;
+ }
+
+ free(store.key);
+ if (store.value_regex != NULL) {
+ regfree(store.value_regex);
+ free(store.value_regex);
+ }
+
+ /* if nothing to unset, or too many matches, error out */
+ if ((store.seen == 0 && value == NULL) ||
+ (store.seen > 1 && multi_replace == 0)) {
+ ret = 5;
+ goto out_free;
+ }
+
+ fstat(in_fd, &st);
+ contents_sz = xsize_t(st.st_size);
+ contents = xmmap(NULL, contents_sz, PROT_READ,
+ MAP_PRIVATE, in_fd, 0);
+ close(in_fd);
+
+ if (store.seen == 0)
+ store.seen = 1;
+
+ for (i = 0, copy_begin = 0; i < store.seen; i++) {
+ if (store.offset[i] == 0) {
+ store.offset[i] = copy_end = contents_sz;
+ } else if (store.state != KEY_SEEN) {
+ copy_end = store.offset[i];
+ } else
+ copy_end = find_beginning_of_line(
+ contents, contents_sz,
+ store.offset[i]-2, &new_line);
+
+ if (copy_end > 0 && contents[copy_end-1] != '\n')
+ new_line = 1;
+
+ /* write the first part of the config */
+ if (copy_end > copy_begin) {
+ if (write_in_full(fd, contents + copy_begin,
+ copy_end - copy_begin) <
+ copy_end - copy_begin)
+ goto write_err_out;
+ if (new_line &&
+ write_in_full(fd, "\n", 1) != 1)
+ goto write_err_out;
+ }
+ copy_begin = store.offset[i];
+ }
+
+ /* write the pair (value == NULL means unset) */
+ if (value != NULL) {
+ if (store.state == START) {
+ if (!store_write_section(fd, key))
+ goto write_err_out;
+ }
+ if (!store_write_pair(fd, key, value))
+ goto write_err_out;
+ }
+
+ /* write the rest of the config */
+ if (copy_begin < contents_sz)
+ if (write_in_full(fd, contents + copy_begin,
+ contents_sz - copy_begin) <
+ contents_sz - copy_begin)
+ goto write_err_out;
+
+ munmap(contents, contents_sz);
+ }
+
+ if (commit_lock_file(lock) < 0) {
+ error("could not commit config file %s", config_filename);
+ ret = 4;
+ goto out_free;
+ }
+
+ /*
+ * lock is committed, so don't try to roll it back below.
+ * NOTE: Since lockfile.c keeps a linked list of all created
+ * lock_file structures, it isn't safe to free(lock). It's
+ * better to just leave it hanging around.
+ */
+ lock = NULL;
+ ret = 0;
+
+out_free:
+ if (lock)
+ rollback_lock_file(lock);
+ free(config_filename);
+ return ret;
+
+write_err_out:
+ ret = write_error(lock->filename);
+ goto out_free;
+
+}
+
+static int section_name_match (const char *buf, const char *name)
+{
+ int i = 0, j = 0, dot = 0;
+ for (; buf[i] && buf[i] != ']'; i++) {
+ if (!dot && isspace(buf[i])) {
+ dot = 1;
+ if (name[j++] != '.')
+ break;
+ for (i++; isspace(buf[i]); i++)
+ ; /* do nothing */
+ if (buf[i] != '"')
+ break;
+ continue;
+ }
+ if (buf[i] == '\\' && dot)
+ i++;
+ else if (buf[i] == '"' && dot) {
+ for (i++; isspace(buf[i]); i++)
+ ; /* do_nothing */
+ break;
+ }
+ if (buf[i] != name[j++])
+ break;
+ }
+ return (buf[i] == ']' && name[j] == 0);
+}
+
+/* if new_name == NULL, the section is removed instead */
+int git_config_rename_section(const char *old_name, const char *new_name)
+{
+ int ret = 0, remove = 0;
+ char *config_filename;
+ struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
+ int out_fd;
+ char buf[1024];
+
+ if (config_exclusive_filename)
+ config_filename = xstrdup(config_exclusive_filename);
+ else
+ config_filename = xstrdup(git_path("config"));
+ out_fd = hold_lock_file_for_update(lock, config_filename, 0);
+ if (out_fd < 0) {
+ ret = error("could not lock config file %s", config_filename);
+ goto out;
+ }
+
+ if (!(config_file = fopen(config_filename, "rb"))) {
+ /* no config file means nothing to rename, no error */
+ goto unlock_and_out;
+ }
+
+ while (fgets(buf, sizeof(buf), config_file)) {
+ int i;
+ int length;
+ for (i = 0; buf[i] && isspace(buf[i]); i++)
+ ; /* do nothing */
+ if (buf[i] == '[') {
+ /* it's a section */
+ if (section_name_match (&buf[i+1], old_name)) {
+ ret++;
+ if (new_name == NULL) {
+ remove = 1;
+ continue;
+ }
+ store.baselen = strlen(new_name);
+ if (!store_write_section(out_fd, new_name)) {
+ ret = write_error(lock->filename);
+ goto out;
+ }
+ continue;
+ }
+ remove = 0;
+ }
+ if (remove)
+ continue;
+ length = strlen(buf);
+ if (write_in_full(out_fd, buf, length) != length) {
+ ret = write_error(lock->filename);
+ goto out;
+ }
+ }
+ fclose(config_file);
+ unlock_and_out:
+ if (commit_lock_file(lock) < 0)
+ ret = error("could not commit config file %s", config_filename);
+ out:
+ free(config_filename);
+ return ret;
+}
+
+/*
+ * Call this to report error for your variable that should not
+ * get a boolean value (i.e. "[my] var" means "true").
+ */
+int config_error_nonbool(const char *var)
+{
+ return error("Missing value for '%s'", var);
+}
generated by cgit v0.10.2-6-g49f6 at 2024-04-24 18:25:09 (GMT)