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builtin-prune.c
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#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "builtin.h"
#include "reachable.h"
#include "parse-options.h"
static const char * const prune_usage[] = {
"git prune [-n] [-v] [--expire <time>] [--] [<head>...]",
NULL
};
static int show_only;
static int verbose;
static unsigned long expire;
static int prune_tmp_object(const char *path, const char *filename)
{
const char *fullpath = mkpath("%s/%s", path, filename);
if (expire) {
struct stat st;
if (lstat(fullpath, &st))
return error("Could not stat '%s'", fullpath);
if (st.st_mtime > expire)
return 0;
}
printf("Removing stale temporary file %s\n", fullpath);
if (!show_only)
unlink(fullpath);
return 0;
}
static int prune_object(char *path, const char *filename, const unsigned char *sha1)
{
const char *fullpath = mkpath("%s/%s", path, filename);
if (expire) {
struct stat st;
if (lstat(fullpath, &st))
return error("Could not stat '%s'", fullpath);
if (st.st_mtime > expire)
return 0;
}
if (show_only || verbose) {
enum object_type type = sha1_object_info(sha1, NULL);
printf("%s %s\n", sha1_to_hex(sha1),
(type > 0) ? typename(type) : "unknown");
}
if (!show_only)
unlink(fullpath);
return 0;
}
static int prune_dir(int i, char *path)
{
DIR *dir = opendir(path);
struct dirent *de;
if (!dir)
return 0;
while ((de = readdir(dir)) != NULL) {
char name[100];
unsigned char sha1[20];
int len = strlen(de->d_name);
switch (len) {
case 2:
if (de->d_name[1] != '.')
break;
case 1:
if (de->d_name[0] != '.')
break;
continue;
case 38:
sprintf(name, "%02x", i);
memcpy(name+2, de->d_name, len+1);
if (get_sha1_hex(name, sha1) < 0)
break;
/*
* Do we know about this object?
* It must have been reachable
*/
if (lookup_object(sha1))
continue;
prune_object(path, de->d_name, sha1);
continue;
}
if (!prefixcmp(de->d_name, "tmp_obj_")) {
prune_tmp_object(path, de->d_name);
continue;
}
fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
}
if (!show_only)
rmdir(path);
closedir(dir);
return 0;
}
static void prune_object_dir(const char *path)
{
int i;
for (i = 0; i < 256; i++) {
static char dir[4096];
sprintf(dir, "%s/%02x", path, i);
prune_dir(i, dir);
}
}
/*
* Write errors (particularly out of space) can result in
* failed temporary packs (and more rarely indexes and other
* files begining with "tmp_") accumulating in the object
* and the pack directories.
*/
static void remove_temporary_files(const char *path)
{
DIR *dir;
struct dirent *de;
dir = opendir(path);
if (!dir) {
fprintf(stderr, "Unable to open directory %s\n", path);
return;
}
while ((de = readdir(dir)) != NULL)
if (!prefixcmp(de->d_name, "tmp_"))
prune_tmp_object(path, de->d_name);
closedir(dir);
}
int cmd_prune(int argc, const char **argv, const char *prefix)
{
struct rev_info revs;
const struct option options[] = {
OPT_BOOLEAN('n', NULL, &show_only,
"do not remove, show only"),
OPT_BOOLEAN('v', NULL, &verbose,
"report pruned objects"),
OPT_DATE(0, "expire", &expire,
"expire objects older than <time>"),
OPT_END()
};
char *s;
save_commit_buffer = 0;
init_revisions(&revs, prefix);
argc = parse_options(argc, argv, options, prune_usage, 0);
while (argc--) {
unsigned char sha1[20];
const char *name = *argv++;
if (!get_sha1(name, sha1)) {
struct object *object = parse_object(sha1);
if (!object)
die("bad object: %s", name);
add_pending_object(&revs, object, "");
}
else
die("unrecognized argument: %s", name);
}
mark_reachable_objects(&revs, 1);
prune_object_dir(get_object_directory());
prune_packed_objects(show_only);
remove_temporary_files(get_object_directory());
s = xstrdup(mkpath("%s/pack", get_object_directory()));
remove_temporary_files(s);
free(s);
return 0;
}