diff mbox series

[v4,4/6] config: extract function to parse config pairs

Message ID 63fb8ad99742d748dc00306be6d2e05bd0ed583d.1607514692.git.ps@pks.im (mailing list archive)
State Superseded
Headers show
Series config: allow specifying config entries via env | expand

Commit Message

Patrick Steinhardt Dec. 9, 2020, 11:52 a.m. UTC
The function `git_config_parse_parameter` is responsible for parsing a
`foo.bar=baz`-formatted configuration key, sanitizing the key and then
processing it via the given callback function. Given that we're about to
add a second user which is going to process keys in such which already
has keys and values separated, this commit extracts a function
`config_parse_pair` which only does the sanitization and processing
part.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 config.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

Comments

Ævar Arnfjörð Bjarmason Dec. 9, 2020, 1:12 p.m. UTC | #1
On Wed, Dec 09 2020, Patrick Steinhardt wrote:

> +static int config_parse_pair(const char *key, const char *value,
> +			  config_fn_t fn, void *data)
> +{
> +	char *canonical_name;
> +	int ret;
> +
> +	if (!strlen(key))
> +		return error(_("empty config key"));

We just did this check (just before the context of the second hunk in
this patch) before calling this function:

    if (!pair[0]->len) {
        strbuf_list_free(pair);
        return error(_("bogus config parameter: %s"), text);

I think just removing this is best, for such a closely coupled static
function we can just rely on the sanity of the caller, but it should at
least be:

    if (!strlen(key))
        BUG("clear that it's unreachable, and a translator won't bother with it, like _()...");

Aside: It's more C-idiom-y in this case to write:

    if (!*key)


> +	if (git_config_parse_key(key, &canonical_name, NULL))
> +		return -1;
> +
> +	ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
> +	free(canonical_name);
> +	return ret;
> +}
> +
>  int git_config_parse_parameter(const char *text,
>  			       config_fn_t fn, void *data)
>  {
>  	const char *value;
> -	char *canonical_name;
>  	struct strbuf **pair;
>  	int ret;
>  
> @@ -483,12 +498,7 @@ int git_config_parse_parameter(const char *text,
>  		return error(_("bogus config parameter: %s"), text);
>  	}
>  
> -	if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
> -		ret = -1;
> -	} else {
> -		ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
> -		free(canonical_name);
> -	}
> +	ret = config_parse_pair(pair[0]->buf, value, fn, data);
>  	strbuf_list_free(pair);
>  	return ret;
>  }
diff mbox series

Patch

diff --git a/config.c b/config.c
index cde3511110..151980e5c9 100644
--- a/config.c
+++ b/config.c
@@ -458,11 +458,26 @@  int git_config_key_is_valid(const char *key)
 	return !git_config_parse_key_1(key, NULL, NULL, 1);
 }
 
+static int config_parse_pair(const char *key, const char *value,
+			  config_fn_t fn, void *data)
+{
+	char *canonical_name;
+	int ret;
+
+	if (!strlen(key))
+		return error(_("empty config key"));
+	if (git_config_parse_key(key, &canonical_name, NULL))
+		return -1;
+
+	ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
+	free(canonical_name);
+	return ret;
+}
+
 int git_config_parse_parameter(const char *text,
 			       config_fn_t fn, void *data)
 {
 	const char *value;
-	char *canonical_name;
 	struct strbuf **pair;
 	int ret;
 
@@ -483,12 +498,7 @@  int git_config_parse_parameter(const char *text,
 		return error(_("bogus config parameter: %s"), text);
 	}
 
-	if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
-		ret = -1;
-	} else {
-		ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
-		free(canonical_name);
-	}
+	ret = config_parse_pair(pair[0]->buf, value, fn, data);
 	strbuf_list_free(pair);
 	return ret;
 }