Jeff King <peff@xxxxxxxx> writes:
> Here is the patch I wrote, for reference (I also think breaking the
> "matches" function into a series of conditionals, as you showed, is way
> more readable):
OK, while reviewing the today's issue of "What's cooking" and making
topics graduate to 'master', I got annoyed that the bottom of jch
branch still needed to be kept. Let's do this.
-- >8 --
From: Jeff King <peff@xxxxxxxx>
Date: Tue, 19 Aug 2014 02:20:00 -0400
Subject: [PATCH] config: avoid a funny sentinel value "a^"
Introduce CONFIG_REGEX_NONE as a more explicit sentinel value to say
"we do not want to replace any existing entry" and use it in the
implementation of "git config --add".
Signed-off-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin/config.c | 3 ++-
cache.h | 2 ++
config.c | 23 +++++++++++++++++------
3 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/builtin/config.c b/builtin/config.c
index 8224699..bf1aa6b 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -599,7 +599,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
check_argc(argc, 2, 2);
value = normalize_value(argv[0], argv[1]);
return git_config_set_multivar_in_file(given_config_source.file,
- argv[0], value, "a^", 0);
+ argv[0], value,
+ CONFIG_REGEX_NONE, 0);
}
else if (actions == ACTION_REPLACE_ALL) {
check_write();
diff --git a/cache.h b/cache.h
index c708062..8356168 100644
--- a/cache.h
+++ b/cache.h
@@ -1233,6 +1233,8 @@ extern int update_server_info(int);
#define CONFIG_INVALID_PATTERN 6
#define CONFIG_GENERIC_ERROR 7
+#define CONFIG_REGEX_NONE ((void *)1)
+
struct git_config_source {
unsigned int use_stdin:1;
const char *file;
diff --git a/config.c b/config.c
index ffe0104..2e709bf 100644
--- a/config.c
+++ b/config.c
@@ -1230,10 +1230,15 @@ static struct {
static int matches(const char *key, const char *value)
{
- return !strcmp(key, store.key) &&
- (store.value_regex == NULL ||
- (store.do_not_match ^
- (value && !regexec(store.value_regex, value, 0, NULL, 0))));
+ if (strcmp(key, store.key))
+ return 0; /* not ours */
+ if (!store.value_regex)
+ return 1; /* always matches */
+ if (store.value_regex == CONFIG_REGEX_NONE)
+ return 0; /* never matches */
+
+ return store.do_not_match ^
+ (value && !regexec(store.value_regex, value, 0, NULL, 0));
}
static int store_aux(const char *key, const char *value, void *cb)
@@ -1495,6 +1500,8 @@ out_free_ret_1:
/*
* 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
+ * (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.
@@ -1578,6 +1585,8 @@ int git_config_set_multivar_in_file(const char *config_filename,
if (value_regex == NULL)
store.value_regex = NULL;
+ else if (value_regex == CONFIG_REGEX_NONE)
+ store.value_regex = CONFIG_REGEX_NONE;
else {
if (value_regex[0] == '!') {
store.do_not_match = 1;
@@ -1609,7 +1618,8 @@ int git_config_set_multivar_in_file(const char *config_filename,
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) {
+ if (store.value_regex != NULL &&
+ store.value_regex != CONFIG_REGEX_NONE) {
regfree(store.value_regex);
free(store.value_regex);
}
@@ -1618,7 +1628,8 @@ int git_config_set_multivar_in_file(const char *config_filename,
}
free(store.key);
- if (store.value_regex != NULL) {
+ if (store.value_regex != NULL &&
+ store.value_regex != CONFIG_REGEX_NONE) {
regfree(store.value_regex);
free(store.value_regex);
}
--
2.1.0-466-g6597b3e
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