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rerere: libify rerere_clear() and rerere_gc()

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This moves the two features from builtin/rerere.c to a more library-ish
portion of the codebase.  No behaviour change.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-05-08 12:55:34 -07:00
parent 9db1941458
commit 0f891e7d7e
3 changed files with 88 additions and 75 deletions
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77
builtin/rerere.c
View File

@ -12,74 +12,6 @@ static const char * const rerere_usage[] = {
NULL,
};
/* these values are days */
static int cutoff_noresolve = 15;
static int cutoff_resolve = 60;
static time_t rerere_created_at(const char *name)
{
struct stat st;
return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
}
static time_t rerere_last_used_at(const char *name)
{
struct stat st;
return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime;
}
static void unlink_rr_item(const char *name)
{
unlink(rerere_path(name, "thisimage"));
unlink(rerere_path(name, "preimage"));
unlink(rerere_path(name, "postimage"));
rmdir(git_path("rr-cache/%s", name));
}
static int git_rerere_gc_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "gc.rerereresolved"))
cutoff_resolve = git_config_int(var, value);
else if (!strcmp(var, "gc.rerereunresolved"))
cutoff_noresolve = git_config_int(var, value);
else
return git_default_config(var, value, cb);
return 0;
}
static void garbage_collect(struct string_list *rr)
{
struct string_list to_remove = STRING_LIST_INIT_DUP;
DIR *dir;
struct dirent *e;
int i, cutoff;
time_t now = time(NULL), then;
git_config(git_rerere_gc_config, NULL);
dir = opendir(git_path("rr-cache"));
if (!dir)
die_errno("unable to open rr-cache directory");
while ((e = readdir(dir))) {
if (is_dot_or_dotdot(e->d_name))
continue;
then = rerere_last_used_at(e->d_name);
if (then) {
cutoff = cutoff_resolve;
} else {
then = rerere_created_at(e->d_name);
if (!then)
continue;
cutoff = cutoff_noresolve;
}
if (then < now - cutoff * 86400)
string_list_append(&to_remove, e->d_name);
}
for (i = 0; i < to_remove.nr; i++)
unlink_rr_item(to_remove.items[i].string);
string_list_clear(&to_remove, 0);
}
static int outf(void *dummy, mmbuffer_t *ptr, int nbuf)
{
int i;
@ -148,14 +80,9 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
return 0;
if (!strcmp(argv[0], "clear")) {
for (i = 0; i < merge_rr.nr; i++) {
const char *name = (const char *)merge_rr.items[i].util;
if (!has_rerere_resolution(name))
unlink_rr_item(name);
}
unlink_or_warn(git_path("MERGE_RR"));
rerere_clear(&merge_rr);
} else if (!strcmp(argv[0], "gc"))
garbage_collect(&merge_rr);
rerere_gc(&merge_rr);
else if (!strcmp(argv[0], "status"))
for (i = 0; i < merge_rr.nr; i++)
printf("%s\n", merge_rr.items[i].string);

84
rerere.c
View File

@ -671,3 +671,87 @@ int rerere_forget(const char **pathspec)
}
return write_rr(&merge_rr, fd);
}
static time_t rerere_created_at(const char *name)
{
struct stat st;
return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
}
static time_t rerere_last_used_at(const char *name)
{
struct stat st;
return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime;
}
static void unlink_rr_item(const char *name)
{
unlink(rerere_path(name, "thisimage"));
unlink(rerere_path(name, "preimage"));
unlink(rerere_path(name, "postimage"));
rmdir(git_path("rr-cache/%s", name));
}
struct rerere_gc_config_cb {
int cutoff_noresolve;
int cutoff_resolve;
};
static int git_rerere_gc_config(const char *var, const char *value, void *cb)
{
struct rerere_gc_config_cb *cf = cb;
if (!strcmp(var, "gc.rerereresolved"))
cf->cutoff_resolve = git_config_int(var, value);
else if (!strcmp(var, "gc.rerereunresolved"))
cf->cutoff_noresolve = git_config_int(var, value);
else
return git_default_config(var, value, cb);
return 0;
}
void rerere_gc(struct string_list *rr)
{
struct string_list to_remove = STRING_LIST_INIT_DUP;
DIR *dir;
struct dirent *e;
int i, cutoff;
time_t now = time(NULL), then;
struct rerere_gc_config_cb cf = { 15, 60 };
git_config(git_rerere_gc_config, &cf);
dir = opendir(git_path("rr-cache"));
if (!dir)
die_errno("unable to open rr-cache directory");
while ((e = readdir(dir))) {
if (is_dot_or_dotdot(e->d_name))
continue;
then = rerere_last_used_at(e->d_name);
if (then) {
cutoff = cf.cutoff_resolve;
} else {
then = rerere_created_at(e->d_name);
if (!then)
continue;
cutoff = cf.cutoff_noresolve;
}
if (then < now - cutoff * 86400)
string_list_append(&to_remove, e->d_name);
}
for (i = 0; i < to_remove.nr; i++)
unlink_rr_item(to_remove.items[i].string);
string_list_clear(&to_remove, 0);
}
void rerere_clear(struct string_list *merge_rr)
{
int i;
for (i = 0; i < merge_rr->nr; i++) {
const char *name = (const char *)merge_rr->items[i].util;
if (!has_rerere_resolution(name))
unlink_rr_item(name);
}
unlink_or_warn(git_path("MERGE_RR"));
}

2
rerere.h
View File

@ -19,6 +19,8 @@ extern const char *rerere_path(const char *hex, const char *file);
extern int has_rerere_resolution(const char *hex);
extern int rerere_forget(const char **);
extern int rerere_remaining(struct string_list *);
extern void rerere_clear(struct string_list *);
extern void rerere_gc(struct string_list *);
#define OPT_RERERE_AUTOUPDATE(v) OPT_UYN(0, "rerere-autoupdate", (v), \
"update the index with reused conflict resolution if possible")