Subject: Re: [PATCH] refname_match(): always use the rules in ref_rev_parse_rules

From: Junio C Hamano <[email-masked]>
Date: Tue, 14 Jan 2014 14:16:02 -0800

Michael Haggerty <[email-masked]> writes:

> We used to use two separate rules for the normal ref resolution
> dwimming and dwimming done to decide which remote ref to grab.  The
> third parameter to refname_match() selected which rules to use.
>
> When these two rules were harmonized in
>
>     2011-11-04 dd621df9cd refs DWIMmery: use the same rule for both "git fetch" and others
>
> , ref_fetch_rules was #defined to avoid potential breakages for
> in-flight topics.
>
> It is now safe to remove the backwards-compatibility code, so remove
> refname_match()'s third parameter, make ref_rev_parse_rules private to
> refs.c, and remove ref_fetch_rules entirely.
>
> Suggested-by: Junio C Hamano <[email-masked]>
> Signed-off-by: Michael Haggerty <[email-masked]>
> ---
> See
>
>     http://article.gmane.org/gmane.comp.version-control.git/240305
>
> in which Junio made the suggestion and wrote most of the commit
> message :-)

;-) ...and on top of it this may be an obvious endgame follow-up.

was done mindlessly and mechanically, so there may be some slip-ups,
though.

 refs.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/refs.c b/refs.c
index 5a10c25..b1c9cf5 100644
--- a/refs.c
+++ b/refs.c
@@ -1886,16 +1886,16 @@ static const char *ref_rev_parse_rules[] = {
 	"refs/tags/%.*s",
 	"refs/heads/%.*s",
 	"refs/remotes/%.*s",
-	"refs/remotes/%.*s/HEAD",
-	NULL
+	"refs/remotes/%.*s/HEAD"
 };
 
 int refname_match(const char *abbrev_name, const char *full_name)
 {
-	const char **p;
+	int i;
 	const int abbrev_name_len = strlen(abbrev_name);
 
-	for (p = ref_rev_parse_rules; *p; p++) {
+	for (i = 0; i < ARRAY_SIZE(ref_rev_parse_rules); i++) {
+		const char **p = &ref_rev_parse_rules[i];
 		if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
 			return 1;
 		}
@@ -1963,11 +1963,13 @@ static char *substitute_branch_name(const char **string, int *len)
 int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
 {
 	char *last_branch = substitute_branch_name(&str, &len);
-	const char **p, *r;
+	int i;
+	const char *r;
 	int refs_found = 0;
 
 	*ref = NULL;
-	for (p = ref_rev_parse_rules; *p; p++) {
+	for (i = 0; i < ARRAY_SIZE(ref_rev_parse_rules); i++) {
+		const char **p = &ref_rev_parse_rules[i];
 		char fullref[PATH_MAX];
 		unsigned char sha1_from_ref[20];
 		unsigned char *this_result;
@@ -1994,11 +1996,11 @@ int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
 int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
 {
 	char *last_branch = substitute_branch_name(&str, &len);
-	const char **p;
-	int logs_found = 0;
+	int logs_found = 0, i;
 
 	*log = NULL;
-	for (p = ref_rev_parse_rules; *p; p++) {
+	for (i = 0; i < ARRAY_SIZE(ref_rev_parse_rules); i++) {
+		const char **p = &ref_rev_parse_rules[i];
 		struct stat st;
 		unsigned char hash[20];
 		char path[PATH_MAX];
@@ -3368,8 +3370,8 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
 	if (!nr_rules) {
 		size_t total_len = 0;
 
-		/* the rule list is NULL terminated, count them first */
-		for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++)
+		/* Count the bytesize needed to hold rule strings */
+		for (nr_rules = 0; ARRAY_SIZE(ref_rev_parse_rules); nr_rules++)
 			/* no +1 because strlen("%s") < strlen("%.*s") */
 			total_len += strlen(ref_rev_parse_rules[nr_rules]);