Merge branch 'ds/config-literal-value'

Various subcommands of "git config" that takes value_regex
learn the "--literal-value" option to take the value_regex option
as a literal string.

* ds/config-literal-value:
  config doc: value-pattern is not necessarily a regexp
  config: implement --fixed-value with --get*
  config: plumb --fixed-value into config API
  config: add --fixed-value option, un-implemented
  t1300: add test for --replace-all with value-pattern
  t1300: test "set all" mode with value-pattern
  config: replace 'value_regex' with 'value_pattern'
  config: convert multi_replace to flags

1 files changed, 40 insertions, 35 deletions

diff --git a/config.c b/config.c
index 8f324ed3a6..1137bd73af 100644
--- a/config.c
+++ b/config.c
@@ -2415,7 +2415,8 @@ struct config_store_data {
 	size_t baselen;
 	char *key;
 	int do_not_match;
-	regex_t *value_regex;
+	const char *fixed_value;
+	regex_t *value_pattern;
 	int multi_replace;
 	struct {
 		size_t begin, end;
@@ -2429,10 +2430,10 @@ struct config_store_data {
 static void config_store_data_clear(struct config_store_data *store)
 {
 	free(store->key);
-	if (store->value_regex != NULL &&
-	    store->value_regex != CONFIG_REGEX_NONE) {
-		regfree(store->value_regex);
-		free(store->value_regex);
+	if (store->value_pattern != NULL &&
+	    store->value_pattern != CONFIG_REGEX_NONE) {
+		regfree(store->value_pattern);
+		free(store->value_pattern);
 	}
 	free(store->parsed);
 	free(store->seen);
@@ -2444,13 +2445,15 @@ static int matches(const char *key, const char *value,
 {
 	if (strcmp(key, store->key))
 		return 0; /* not ours */
-	if (!store->value_regex)
+	if (store->fixed_value)
+		return !strcmp(store->fixed_value, value);
+	if (!store->value_pattern)
 		return 1; /* always matches */
-	if (store->value_regex == CONFIG_REGEX_NONE)
+	if (store->value_pattern == CONFIG_REGEX_NONE)
 		return 0; /* never matches */
 
 	return store->do_not_match ^
-		(value && !regexec(store->value_regex, value, 0, NULL, 0));
+		(value && !regexec(store->value_pattern, value, 0, NULL, 0));
 }
 
 static int store_aux_event(enum config_event_t type,
@@ -2726,12 +2729,12 @@ void git_config_set(const char *key, const char *value)
 
 /*
  * If value==NULL, unset in (remove from) config,
- * if value_regex!=NULL, disregard key/value pairs where value does not match.
- * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
+ * if value_pattern!=NULL, disregard key/value pairs where value does not match.
+ * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
  *     (only add a new one)
- * 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.
+ * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
+ *     key/values are removed before a single new pair is written. If the
+ *     flag is not present, then replace only the first match.
  *
  * Returns 0 on success.
  *
@@ -2751,8 +2754,8 @@ void git_config_set(const char *key, const char *value)
  */
 int git_config_set_multivar_in_file_gently(const char *config_filename,
 					   const char *key, const char *value,
-					   const char *value_regex,
-					   int multi_replace)
+					   const char *value_pattern,
+					   unsigned flags)
 {
 	int fd = -1, in_fd = -1;
 	int ret;
@@ -2769,7 +2772,7 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
 	if (ret)
 		goto out_free;
 
-	store.multi_replace = multi_replace;
+	store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
 
 	if (!config_filename)
 		config_filename = filename_buf = git_pathdup("config");
@@ -2812,22 +2815,24 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
 		int i, new_line = 0;
 		struct config_options opts;
 
-		if (value_regex == NULL)
-			store.value_regex = NULL;
-		else if (value_regex == CONFIG_REGEX_NONE)
-			store.value_regex = CONFIG_REGEX_NONE;
+		if (value_pattern == NULL)
+			store.value_pattern = NULL;
+		else if (value_pattern == CONFIG_REGEX_NONE)
+			store.value_pattern = CONFIG_REGEX_NONE;
+		else if (flags & CONFIG_FLAGS_FIXED_VALUE)
+			store.fixed_value = value_pattern;
 		else {
-			if (value_regex[0] == '!') {
+			if (value_pattern[0] == '!') {
 				store.do_not_match = 1;
-				value_regex++;
+				value_pattern++;
 			} else
 				store.do_not_match = 0;
 
-			store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
-			if (regcomp(store.value_regex, value_regex,
+			store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
+			if (regcomp(store.value_pattern, value_pattern,
 					REG_EXTENDED)) {
-				error(_("invalid pattern: %s"), value_regex);
-				FREE_AND_NULL(store.value_regex);
+				error(_("invalid pattern: %s"), value_pattern);
+				FREE_AND_NULL(store.value_pattern);
 				ret = CONFIG_INVALID_PATTERN;
 				goto out_free;
 			}
@@ -2858,7 +2863,7 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
 
 		/* if nothing to unset, or too many matches, error out */
 		if ((store.seen_nr == 0 && value == NULL) ||
-		    (store.seen_nr > 1 && multi_replace == 0)) {
+		    (store.seen_nr > 1 && !store.multi_replace)) {
 			ret = CONFIG_NOTHING_SET;
 			goto out_free;
 		}
@@ -2997,10 +3002,10 @@ write_err_out:
 
 void git_config_set_multivar_in_file(const char *config_filename,
 				     const char *key, const char *value,
-				     const char *value_regex, int multi_replace)
+				     const char *value_pattern, unsigned flags)
 {
 	if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
-						    value_regex, multi_replace))
+						    value_pattern, flags))
 		return;
 	if (value)
 		die(_("could not set '%s' to '%s'"), key, value);
@@ -3009,17 +3014,17 @@ void git_config_set_multivar_in_file(const char *config_filename,
 }
 
 int git_config_set_multivar_gently(const char *key, const char *value,
-				   const char *value_regex, int multi_replace)
+				   const char *value_pattern, unsigned flags)
 {
-	return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
-						      multi_replace);
+	return git_config_set_multivar_in_file_gently(NULL, key, value, value_pattern,
+						      flags);
 }
 
 void git_config_set_multivar(const char *key, const char *value,
-			     const char *value_regex, int multi_replace)
+			     const char *value_pattern, unsigned flags)
 {
-	git_config_set_multivar_in_file(NULL, key, value, value_regex,
-					multi_replace);
+	git_config_set_multivar_in_file(NULL, key, value, value_pattern,
+					flags);
 }
 
 static int section_name_match (const char *buf, const char *name)