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Make the pack-refs interfaces usable from outside

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This just basically creates a "pack_refs()" function that could be used by
anybody. You pass it in the flags you want as a bitmask (PACK_REFS_ALL and
PACK_REFS_PRUNE), and it will do all the heavy lifting.

Of course, it's still static, and it's all in the builtin-pack-refs.c
file, so it's not actually visible to the outside, but the next step would
be to just move it all to a library file (probably refs.c) and expose it.

Then we could easily make "git gc" do this too.

While I did it, I also made it check the return value of the fflush and
fsync stage, to make sure that we don't overwrite the old packed-refs file
with something that got truncated due to write errors!

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Linus Torvalds 2007-05-26 09:25:31 -07:00 committed by Junio C Hamano
parent c56ed464b0
commit 99b5a79e13
1 changed files with 41 additions and 31 deletions
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72
builtin-pack-refs.c
View file

@ -12,9 +12,11 @@ struct ref_to_prune {
char name[FLEX_ARRAY];
};
#define PACK_REFS_PRUNE 0x0001
#define PACK_REFS_ALL 0x0002
struct pack_refs_cb_data {
int prune;
int all;
unsigned int flags;
struct ref_to_prune *ref_to_prune;
FILE *refs_file;
};
@ -39,7 +41,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
is_tag_ref = !prefixcmp(path, "refs/tags/");
/* ALWAYS pack refs that were already packed or are tags */
if (!cb->all && !is_tag_ref && !(flags & REF_ISPACKED))
if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref && !(flags & REF_ISPACKED))
return 0;
fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path);
@ -53,7 +55,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
}
}
if (cb->prune && !do_not_prune(flags)) {
if ((cb->flags & PACK_REFS_PRUNE) && !do_not_prune(flags)) {
int namelen = strlen(path) + 1;
struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
hashcpy(n->sha1, sha1);
@ -85,33 +87,13 @@ static void prune_refs(struct ref_to_prune *r)
static struct lock_file packed;
int cmd_pack_refs(int argc, const char **argv, const char *prefix)
static int pack_refs(unsigned int flags)
{
int fd, i;
int fd;
struct pack_refs_cb_data cbdata;
memset(&cbdata, 0, sizeof(cbdata));
cbdata.prune = 1;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--prune")) {
cbdata.prune = 1; /* now the default */
continue;
}
if (!strcmp(arg, "--no-prune")) {
cbdata.prune = 0;
continue;
}
if (!strcmp(arg, "--all")) {
cbdata.all = 1;
continue;
}
/* perhaps other parameters later... */
break;
}
if (i != argc)
usage(builtin_pack_refs_usage);
cbdata.flags = flags;
fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), 1);
cbdata.refs_file = fdopen(fd, "w");
@ -123,12 +105,40 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
fprintf(cbdata.refs_file, "# pack-refs with: peeled \n");
for_each_ref(handle_one_ref, &cbdata);
fflush(cbdata.refs_file);
fsync(fd);
fclose(cbdata.refs_file);
if (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file))
die("failed to write ref-pack file (%s)", strerror(errno));
if (commit_lock_file(&packed) < 0)
die("unable to overwrite old ref-pack file (%s)", strerror(errno));
if (cbdata.prune)
if (cbdata.flags & PACK_REFS_PRUNE)
prune_refs(cbdata.ref_to_prune);
return 0;
}
int cmd_pack_refs(int argc, const char **argv, const char *prefix)
{
int i;
unsigned int flags;
flags = PACK_REFS_PRUNE;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--prune")) {
flags |= PACK_REFS_PRUNE; /* now the default */
continue;
}
if (!strcmp(arg, "--no-prune")) {
flags &= ~PACK_REFS_PRUNE;
continue;
}
if (!strcmp(arg, "--all")) {
flags |= PACK_REFS_ALL;
continue;
}
/* perhaps other parameters later... */
break;
}
if (i != argc)
usage(builtin_pack_refs_usage);
return pack_refs(flags);
}