X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=config.c;h=2ae6153e5ee29ca88f52241d1ece79069d8c5875;hb=7612a1efdb0c0806b43db10ce784707aae874340;hp=bbcafff29f115d3cb1e42d6eb945a857e6aea447;hpb=10bea152a34b2bf1194ede5e0c9e5595ab2100f3;p=git.git

diff --git a/config.c b/config.c
index bbcafff2..2ae6153e 100644
--- a/config.c
+++ b/config.c
@@ -11,6 +11,7 @@
 #define MAXNAME (256)
 
 static FILE *config_file;
+static const char *config_file_name;
 static int config_linenr;
 static int get_next_char(void)
 {
@@ -59,6 +60,12 @@ static char *parse_value(void)
 			space = 1;
 			continue;
 		}
+		if (!quote) {
+			if (c == ';' || c == '#') {
+				comment = 1;
+				continue;
+			}
+		}
 		if (space) {
 			if (len)
 				value[len++] = ' ';
@@ -92,12 +99,6 @@ static char *parse_value(void)
 			quote = 1-quote;
 			continue;
 		}
-		if (!quote) {
-			if (c == ';' || c == '#') {
-				comment = 1;
-				continue;
-			}
-		}
 		value[len++] = c;
 	}
 }
@@ -133,6 +134,41 @@ static int get_value(config_fn_t fn, char *name, unsigned int len)
 	return fn(name, value);
 }
 
+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;
@@ -143,7 +179,9 @@ static int get_base_var(char *name)
 			return -1;
 		if (c == ']')
 			return baselen;
-		if (!isalnum(c))
+		if (isspace(c))
+			return get_extended_base_var(name, baselen, c);
+		if (!isalnum(c) && c != '.')
 			return -1;
 		if (baselen > MAXNAME / 2)
 			return -1;
@@ -186,7 +224,7 @@ static int git_parse_file(config_fn_t fn)
 		if (get_value(fn, var, baselen+1) < 0)
 			break;
 	}
-	die("bad config file line %d", config_linenr);
+	die("bad config file line %d in %s", config_linenr, config_file_name);
 }
 
 int git_config_int(const char *name, const char *value)
@@ -197,7 +235,7 @@ int git_config_int(const char *name, const char *value)
 		if (!*end)
 			return val;
 	}
-	die("bad config value for '%s'", name);
+	die("bad config value for '%s' in %s", name, config_file_name);
 }
 
 int git_config_bool(const char *name, const char *value)
@@ -221,8 +259,23 @@ int git_default_config(const char *var, const char *value)
 		return 0;
 	}
 
-	if (!strcmp(var, "core.symrefsonly")) {
-		only_use_symrefs = git_config_bool(var, value);
+	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;
 	}
 
@@ -236,55 +289,77 @@ int git_default_config(const char *var, const char *value)
 		return 0;
 	}
 
-	if (!strcmp(var, "diff.renamelimit")) {
-		diff_rename_limit_default = git_config_int(var, value);
+	if (!strcmp(var, "i18n.commitencoding")) {
+		strncpy(git_commit_encoding, value, sizeof(git_commit_encoding));
 		return 0;
 	}
 
-	/* Add other config variables here.. */
+	/* Add other config variables here and to Documentation/config.txt. */
 	return 0;
 }
 
-int git_config(config_fn_t fn)
+int git_config_from_file(config_fn_t fn, const char *filename)
 {
 	int ret;
-	FILE *f = fopen(git_path("config"), "r");
+	FILE *f = fopen(filename, "r");
 
 	ret = -1;
 	if (f) {
 		config_file = f;
+		config_file_name = filename;
 		config_linenr = 1;
 		ret = git_parse_file(fn);
 		fclose(f);
+		config_file_name = NULL;
 	}
 	return ret;
 }
 
+int git_config(config_fn_t fn)
+{
+	return git_config_from_file(fn, git_path("config"));
+}
+
 /*
  * 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;
-	off_t offset;
+	int multi_replace;
+	off_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)
 {
 	switch (store.state) {
 	case KEY_SEEN:
-		if (!strcmp(key, store.key) &&
-				(store.value_regex == NULL ||
-				!regexec(store.value_regex, value, 0, NULL, 0))) {
-			if (store.seen == 1) {
+		if (matches(key, value)) {
+			if (store.seen == 1 && store.multi_replace == 0) {
 				fprintf(stderr,
 					"Warning: %s has multiple values\n",
 					key);
+			} else if (store.seen >= MAX_MATCHES) {
+				fprintf(stderr, "Too many matches\n");
+				return 1;
 			}
-			store.offset = ftell(config_file);
+
+			store.offset[store.seen] = ftell(config_file);
 			store.seen++;
 		}
 		break;
@@ -293,26 +368,52 @@ static int store_aux(const char* key, const char* value)
 			store.state = SECTION_END_SEEN;
 			break;
 		} else
-			store.offset = ftell(config_file);
+			/* do not increment matches: this is no match */
+			store.offset[store.seen] = ftell(config_file);
 		/* fallthru */
 	case SECTION_END_SEEN:
 	case START:
-		if (!strcmp(key, store.key) &&
-				(store.value_regex == NULL ||
-				!regexec(store.value_regex, value, 0, NULL, 0))) {
-			store.offset = ftell(config_file);
+		if (matches(key, value)) {
+			store.offset[store.seen] = ftell(config_file);
 			store.state = KEY_SEEN;
 			store.seen++;
-		} else if(!strncmp(key, store.key, store.baselen))
-			store.state = SECTION_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 void store_write_section(int fd, const char* key)
 {
+	const char *dot = strchr(key, '.');
+	int len1 = store.baselen, len2 = -1;
+
+	dot = strchr(key, '.');
+	if (dot) {
+		int dotlen = dot - key;
+		if (dotlen < len1) {
+			len2 = len1 - dotlen - 1;
+			len1 = dotlen;
+		}
+	}
+
 	write(fd, "[", 1);
-	write(fd, key, store.baselen);
+	write(fd, key, len1);
+	if (len2 >= 0) {
+		write(fd, " \"", 2);
+		while (--len2 >= 0) {
+			unsigned char c = *++dot;
+			if (c == '"')
+				write(fd, "\\", 1);
+			write(fd, &c, 1);
+		}
+		write(fd, "\"", 1);
+	}
 	write(fd, "]\n", 2);
 }
 
@@ -334,14 +435,38 @@ static void store_write_pair(int fd, const char* key, const char* value)
 	write(fd, "\n", 1);
 }
 
+static int find_beginning_of_line(const char* contents, int size,
+	int offset_, int* found_bracket)
+{
+	int equal_offset = size, bracket_offset = size;
+	int offset;
+
+	for (offset = offset_-2; offset > 0 
+			&& contents[offset] != '\n'; offset--)
+		switch (contents[offset]) {
+			case '=': equal_offset = offset; break;
+			case ']': bracket_offset = offset; break;
+		}
+	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);
+	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.
  *
@@ -360,38 +485,51 @@ int git_config_set(const char* key, const char* value)
  *
  */
 int git_config_set_multivar(const char* key, const char* value,
-	const char* value_regex)
+	const char* value_regex, int multi_replace)
 {
-	int i;
-	struct stat st;
-	int fd;
-	char* config_file = strdup(git_path("config"));
+	int i, dot;
+	int fd = -1, in_fd;
+	int ret;
+	char* config_filename = strdup(git_path("config"));
 	char* lock_file = strdup(git_path("config.lock"));
+	const char* last_dot = strrchr(key, '.');
 
 	/*
 	 * Since "key" actually contains the section name and the real
 	 * key name separated by a dot, we have to know where the dot is.
 	 */
-	for (store.baselen = 0;
-			key[store.baselen] != '.' && key[store.baselen];
-			store.baselen++);
-	if (!key[store.baselen] || !key[store.baselen+1]) {
+
+	if (last_dot == NULL) {
 		fprintf(stderr, "key does not contain a section: %s\n", key);
-		return 2;
+		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 = (char*)malloc(strlen(key)+1);
-	for (i = 0; key[i]; i++)
-		if (i != store.baselen && (!isalnum(key[i]) ||
-				(i == store.baselen+1 && !isalpha(key[i])))) {
-			fprintf(stderr, "invalid key: %s\n", key);
-			free(store.key);
-			return 1;
-		} else
-			store.key[i] = tolower(key[i]);
+	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 (!isalnum(c) || (i == store.baselen+1 && !isalpha(c))) {
+				fprintf(stderr, "invalid key: %s\n", key);
+				free(store.key);
+				ret = 1;
+				goto out_free;
+			}
+			c = tolower(c);
+		}
+		store.key[i] = c;
+	}
+	store.key[i] = 0;
 
 	/*
 	 * The lock_file serves a purpose in addition to locking: the new
@@ -401,52 +539,58 @@ int git_config_set_multivar(const char* key, const char* value,
 	if (fd < 0) {
 		fprintf(stderr, "could not lock config file\n");
 		free(store.key);
-		return -1;
+		ret = -1;
+		goto out_free;
 	}
 
 	/*
 	 * If .git/config does not exist yet, write a minimal version.
 	 */
-	if (stat(config_file, &st)) {
-		static const char contents[] =
-			"#\n"
-			"# This is the config file\n"
-			"#\n"
-			"\n";
-
+	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) {
-			close(fd);
-			unlink(lock_file);
-			return 5;
+			ret = 5;
+			goto out_free;
 		}
 
 		store.key = (char*)key;
-
-		write(fd, contents, sizeof(contents)-1);
 		store_write_section(fd, key);
 		store_write_pair(fd, key, value);
 	} else{
-		int in_fd;
+		struct stat st;
 		char* contents;
-		int offset, new_line = 0;
+		int i, copy_begin, copy_end, 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*)malloc(sizeof(regex_t));
 			if (regcomp(store.value_regex, value_regex,
 					REG_EXTENDED)) {
-				fprintf(stderr, "Invalid pattern: %s",
+				fprintf(stderr, "Invalid pattern: %s\n",
 					value_regex);
 				free(store.value_regex);
-				return 6;
+				ret = 6;
+				goto out_free;
 			}
 		}
 
-		store.offset = 0;
+		store.offset[0] = 0;
 		store.state = START;
 		store.seen = 0;
 
@@ -463,7 +607,8 @@ int git_config_set_multivar(const char* key, const char* value,
 				regfree(store.value_regex);
 				free(store.value_regex);
 			}
-			return 3;
+			ret = 3;
+			goto out_free;
 		}
 
 		free(store.key);
@@ -472,52 +617,41 @@ int git_config_set_multivar(const char* key, const char* value,
 			free(store.value_regex);
 		}
 
-		/* if nothing to unset, error out */
-		if (store.seen == 0 && value == NULL) {
-			close(fd);
-			unlink(lock_file);
-			return 5;
+		/* 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;
 		}
 
-		store.key = (char*)key;
-
-		in_fd = open(config_file, O_RDONLY, 0666);
+		fstat(in_fd, &st);
 		contents = mmap(NULL, st.st_size, PROT_READ,
 			MAP_PRIVATE, in_fd, 0);
 		close(in_fd);
 
-		if (store.offset == 0) {
-			store.offset = offset = st.st_size;
-		} else if (store.state != KEY_SEEN) {
-			offset = store.offset;
-		} else {
-			int equal_offset = st.st_size,
-				bracket_offset = st.st_size;
-
-			if (value == NULL && store.seen > 1) {
-				fprintf(stderr, "Cannot remove multivar (%s has %d values\n", key, store.seen);
-				close(fd);
-				unlink(lock_file);
-				return 7;
-			}
-			for (offset = store.offset-2; offset > 0 
-					&& contents[offset] != '\n'; offset--)
-				switch (contents[offset]) {
-				case '=': equal_offset = offset; break;
-				case ']': bracket_offset = offset; break;
-				}
-			if (bracket_offset < equal_offset) {
-				new_line = 1;
-				offset = bracket_offset+1;
+		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 = st.st_size;
+			} else if (store.state != KEY_SEEN) {
+				copy_end = store.offset[i];
 			} else
-				offset++;
+				copy_end = find_beginning_of_line(
+					contents, st.st_size,
+					store.offset[i]-2, &new_line);
+
+			/* write the first part of the config */
+			if (copy_end > copy_begin) {
+				write(fd, contents + copy_begin,
+				copy_end - copy_begin);
+				if (new_line)
+					write(fd, "\n", 1);
+			}
+			copy_begin = store.offset[i];
 		}
 
-		/* write the first part of the config */
-		write(fd, contents, offset);
-		if (new_line)
-			write(fd, "\n", 1);
-
 		/* write the pair (value == NULL means unset) */
 		if (value != NULL) {
 			if (store.state == START)
@@ -526,21 +660,32 @@ int git_config_set_multivar(const char* key, const char* value,
 		}
 
 		/* write the rest of the config */
-		if (store.offset < st.st_size)
-			write(fd, contents + store.offset,
-				st.st_size - store.offset);
+		if (copy_begin < st.st_size)
+			write(fd, contents + copy_begin,
+				st.st_size - copy_begin);
 
 		munmap(contents, st.st_size);
-		unlink(config_file);
+		unlink(config_filename);
 	}
 
-	close(fd);
-
-	if (rename(lock_file, config_file) < 0) {
+	if (rename(lock_file, config_filename) < 0) {
 		fprintf(stderr, "Could not rename the lock file?\n");
-		return 4;
+		ret = 4;
+		goto out_free;
 	}
 
-	return 0;
+	ret = 0;
+
+out_free:
+	if (0 <= fd)
+		close(fd);
+	if (config_filename)
+		free(config_filename);
+	if (lock_file) {
+		unlink(lock_file);
+		free(lock_file);
+	}
+	return ret;
 }
 
+