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rerere: rerere_created_at() and has_resolution() abstraction

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There were too many places in the code how an entry in the rerere database
looks like, and the garbage_collect() function that iterates over
subdirectories of the rr-cache directory was the worse offender.

Introduce two helper functions, rerere_created_at() and has_resolution(),
to abstract out the logic a bit better.

Incidentally this fixes a small memory leak in garbage_collect()
function.  The path list to collect the entries to be pruned were defined
to strdup the paths but the caller was feeding a path after doing an extra
copy.  Because the list does not have to be sorted by conflict signature
hash, we use path_list_append() instead of path_list_insert().

While we are at it, make a conflicted hunk comparision in handle_file() a
bit easier to read.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2008-06-21 23:28:58 -07:00
parent 73f03627f4
commit 9022a495a3
1 changed files with 26 additions and 31 deletions
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57
builtin-rerere.c
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@ -23,6 +23,18 @@ static const char *rr_path(const char *name, const char *file)
return git_path("rr-cache/%s/%s", name, file);
}
static time_t rerere_created_at(const char *name)
{
struct stat st;
return stat(rr_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
}
static int has_resolution(const char *name)
{
struct stat st;
return !stat(rr_path(name, "postimage"), &st);
}
static void read_rr(struct path_list *rr)
{
unsigned char sha1[20];
@ -98,13 +110,10 @@ static int handle_file(const char *path,
else if (!prefixcmp(buf, "======="))
hunk = 2;
else if (!prefixcmp(buf, ">>>>>>> ")) {
int cmp = strbuf_cmp(&one, &two);
if (strbuf_cmp(&one, &two) > 0)
strbuf_swap(&one, &two);
hunk_no++;
hunk = 0;
if (cmp > 0) {
strbuf_swap(&one, &two);
}
if (out) {
fputs("<<<<<<<\n", out);
fwrite(one.buf, one.len, 1, out);
@ -201,33 +210,24 @@ static void unlink_rr_item(const char *name)
static void garbage_collect(struct path_list *rr)
{
struct path_list to_remove = { NULL, 0, 0, 1 };
char buf[1024];
DIR *dir;
struct dirent *e;
int len, i, cutoff;
int i, cutoff;
time_t now = time(NULL), then;
strlcpy(buf, git_path("rr-cache"), sizeof(buf));
len = strlen(buf);
dir = opendir(buf);
strcpy(buf + len++, "/");
dir = opendir(git_path("rr-cache"));
while ((e = readdir(dir))) {
const char *name = e->d_name;
struct stat st;
if (name[0] == '.' && (name[1] == '\0' ||
(name[1] == '.' && name[2] == '\0')))
if (name[0] == '.' &&
(name[1] == '\0' || (name[1] == '.' && name[2] == '\0')))
continue;
i = snprintf(buf + len, sizeof(buf) - len, "%s", name);
strlcpy(buf + len + i, "/preimage", sizeof(buf) - len - i);
if (stat(buf, &st))
then = rerere_created_at(name);
if (!then)
continue;
then = st.st_mtime;
strlcpy(buf + len + i, "/postimage", sizeof(buf) - len - i);
cutoff = stat(buf, &st) ? cutoff_noresolve : cutoff_resolve;
if (then < now - cutoff * 86400) {
buf[len + i] = '\0';
path_list_insert(xstrdup(name), &to_remove);
}
cutoff = (has_resolution(name)
? cutoff_resolve : cutoff_noresolve);
if (then < now - cutoff * 86400)
path_list_append(name, &to_remove);
}
for (i = 0; i < to_remove.nr; i++)
unlink_rr_item(to_remove.items[i].path);
@ -306,13 +306,11 @@ static int do_plain_rerere(struct path_list *rr, int fd)
*/
for (i = 0; i < rr->nr; i++) {
struct stat st;
int ret;
const char *path = rr->items[i].path;
const char *name = (const char *)rr->items[i].util;
if (!stat(rr_path(name, "preimage"), &st) &&
!stat(rr_path(name, "postimage"), &st)) {
if (has_resolution(name)) {
if (!merge(name, path)) {
fprintf(stderr, "Resolved '%s' using "
"previous resolution.\n", path);
@ -410,11 +408,8 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
return do_plain_rerere(&merge_rr, fd);
else if (!strcmp(argv[1], "clear")) {
for (i = 0; i < merge_rr.nr; i++) {
struct stat st;
const char *name = (const char *)merge_rr.items[i].util;
if (!stat(git_path("rr-cache/%s", name), &st) &&
S_ISDIR(st.st_mode) &&
stat(rr_path(name, "postimage"), &st))
if (!has_resolution(name))
unlink_rr_item(name);
}
unlink(merge_rr_path);