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![Shawn O. Pearce](/assets/img/avatar_default.png)
Currently the only caller of peel_ref is show-ref, which is using this function to show the peeled tag information if it is available from an existing packed-refs file. The call happens during the for_each_ref callback function, so we have the proper struct ref_list already on the call stack but it is not easily available to return the peeled information to the caller. We now save the current struct ref_list item before calling back into the callback function so that future calls to peel_ref from within the callback function can quickly access the current ref. Doing so will save us an lstat() per ref processed as we no longer have to check the filesystem to see if the ref exists as a loose file or is packed. This current ref caching also saves a linear scan of the cached packed refs list. As a micro-optimization we test the address of the passed ref name against the current_ref->name before we go into the much more costly strcmp(). Nearly any caller of peel_ref will be passing us the same string do_for_each_ref passed them, which is current_ref->name. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1529 lines
36 KiB
C
1529 lines
36 KiB
C
#include "cache.h"
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#include "refs.h"
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#include "object.h"
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#include "tag.h"
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#include "dir.h"
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/* ISSYMREF=01 and ISPACKED=02 are public interfaces */
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#define REF_KNOWS_PEELED 04
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struct ref_list {
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struct ref_list *next;
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unsigned char flag; /* ISSYMREF? ISPACKED? */
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unsigned char sha1[20];
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unsigned char peeled[20];
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char name[FLEX_ARRAY];
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};
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static const char *parse_ref_line(char *line, unsigned char *sha1)
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{
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/*
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* 42: the answer to everything.
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*
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* In this case, it happens to be the answer to
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* 40 (length of sha1 hex representation)
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* +1 (space in between hex and name)
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* +1 (newline at the end of the line)
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*/
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int len = strlen(line) - 42;
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if (len <= 0)
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return NULL;
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if (get_sha1_hex(line, sha1) < 0)
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return NULL;
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if (!isspace(line[40]))
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return NULL;
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line += 41;
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if (isspace(*line))
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return NULL;
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if (line[len] != '\n')
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return NULL;
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line[len] = 0;
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return line;
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}
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static struct ref_list *add_ref(const char *name, const unsigned char *sha1,
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int flag, struct ref_list *list,
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struct ref_list **new_entry)
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{
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int len;
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struct ref_list *entry;
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/* Allocate it and add it in.. */
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len = strlen(name) + 1;
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entry = xmalloc(sizeof(struct ref_list) + len);
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hashcpy(entry->sha1, sha1);
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hashclr(entry->peeled);
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memcpy(entry->name, name, len);
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entry->flag = flag;
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entry->next = list;
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if (new_entry)
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*new_entry = entry;
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return entry;
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}
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/* merge sort the ref list */
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static struct ref_list *sort_ref_list(struct ref_list *list)
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{
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int psize, qsize, last_merge_count, cmp;
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struct ref_list *p, *q, *l, *e;
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struct ref_list *new_list = list;
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int k = 1;
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int merge_count = 0;
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if (!list)
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return list;
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do {
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last_merge_count = merge_count;
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merge_count = 0;
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psize = 0;
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p = new_list;
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q = new_list;
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new_list = NULL;
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l = NULL;
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while (p) {
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merge_count++;
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while (psize < k && q->next) {
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q = q->next;
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psize++;
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}
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qsize = k;
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while ((psize > 0) || (qsize > 0 && q)) {
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if (qsize == 0 || !q) {
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e = p;
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p = p->next;
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psize--;
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} else if (psize == 0) {
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e = q;
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q = q->next;
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qsize--;
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} else {
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cmp = strcmp(q->name, p->name);
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if (cmp < 0) {
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e = q;
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q = q->next;
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qsize--;
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} else if (cmp > 0) {
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e = p;
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p = p->next;
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psize--;
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} else {
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if (hashcmp(q->sha1, p->sha1))
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die("Duplicated ref, and SHA1s don't match: %s",
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q->name);
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warning("Duplicated ref: %s", q->name);
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e = q;
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q = q->next;
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qsize--;
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free(e);
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e = p;
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p = p->next;
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psize--;
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}
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}
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e->next = NULL;
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if (l)
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l->next = e;
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if (!new_list)
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new_list = e;
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l = e;
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}
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p = q;
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};
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k = k * 2;
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} while ((last_merge_count != merge_count) || (last_merge_count != 1));
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return new_list;
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}
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/*
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* Future: need to be in "struct repository"
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* when doing a full libification.
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*/
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static struct cached_refs {
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char did_loose;
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char did_packed;
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struct ref_list *loose;
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struct ref_list *packed;
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} cached_refs;
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static struct ref_list *current_ref;
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static void free_ref_list(struct ref_list *list)
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{
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struct ref_list *next;
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for ( ; list; list = next) {
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next = list->next;
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free(list);
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}
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}
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static void invalidate_cached_refs(void)
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{
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struct cached_refs *ca = &cached_refs;
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if (ca->did_loose && ca->loose)
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free_ref_list(ca->loose);
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if (ca->did_packed && ca->packed)
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free_ref_list(ca->packed);
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ca->loose = ca->packed = NULL;
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ca->did_loose = ca->did_packed = 0;
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}
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static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
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{
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struct ref_list *list = NULL;
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struct ref_list *last = NULL;
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char refline[PATH_MAX];
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int flag = REF_ISPACKED;
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while (fgets(refline, sizeof(refline), f)) {
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unsigned char sha1[20];
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const char *name;
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static const char header[] = "# pack-refs with:";
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if (!strncmp(refline, header, sizeof(header)-1)) {
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const char *traits = refline + sizeof(header) - 1;
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if (strstr(traits, " peeled "))
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flag |= REF_KNOWS_PEELED;
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/* perhaps other traits later as well */
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continue;
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}
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name = parse_ref_line(refline, sha1);
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if (name) {
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list = add_ref(name, sha1, flag, list, &last);
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continue;
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}
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if (last &&
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refline[0] == '^' &&
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strlen(refline) == 42 &&
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refline[41] == '\n' &&
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!get_sha1_hex(refline + 1, sha1))
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hashcpy(last->peeled, sha1);
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}
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cached_refs->packed = sort_ref_list(list);
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}
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static struct ref_list *get_packed_refs(void)
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{
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if (!cached_refs.did_packed) {
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FILE *f = fopen(git_path("packed-refs"), "r");
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cached_refs.packed = NULL;
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if (f) {
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read_packed_refs(f, &cached_refs);
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fclose(f);
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}
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cached_refs.did_packed = 1;
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}
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return cached_refs.packed;
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}
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static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
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{
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DIR *dir = opendir(git_path("%s", base));
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if (dir) {
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struct dirent *de;
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int baselen = strlen(base);
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char *ref = xmalloc(baselen + 257);
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memcpy(ref, base, baselen);
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if (baselen && base[baselen-1] != '/')
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ref[baselen++] = '/';
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while ((de = readdir(dir)) != NULL) {
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unsigned char sha1[20];
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struct stat st;
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int flag;
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int namelen;
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if (de->d_name[0] == '.')
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continue;
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namelen = strlen(de->d_name);
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if (namelen > 255)
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continue;
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if (has_extension(de->d_name, ".lock"))
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continue;
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memcpy(ref + baselen, de->d_name, namelen+1);
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if (stat(git_path("%s", ref), &st) < 0)
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continue;
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if (S_ISDIR(st.st_mode)) {
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list = get_ref_dir(ref, list);
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continue;
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}
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if (!resolve_ref(ref, sha1, 1, &flag)) {
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error("%s points nowhere!", ref);
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continue;
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}
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list = add_ref(ref, sha1, flag, list, NULL);
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}
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free(ref);
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closedir(dir);
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}
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return sort_ref_list(list);
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}
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static struct ref_list *get_loose_refs(void)
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{
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if (!cached_refs.did_loose) {
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cached_refs.loose = get_ref_dir("refs", NULL);
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cached_refs.did_loose = 1;
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}
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return cached_refs.loose;
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}
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/* We allow "recursive" symbolic refs. Only within reason, though */
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#define MAXDEPTH 5
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#define MAXREFLEN (1024)
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static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
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{
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FILE *f;
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struct cached_refs refs;
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struct ref_list *ref;
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int retval;
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strcpy(name + pathlen, "packed-refs");
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f = fopen(name, "r");
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if (!f)
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return -1;
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read_packed_refs(f, &refs);
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fclose(f);
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ref = refs.packed;
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retval = -1;
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while (ref) {
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if (!strcmp(ref->name, refname)) {
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retval = 0;
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memcpy(result, ref->sha1, 20);
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break;
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}
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ref = ref->next;
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}
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free_ref_list(refs.packed);
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return retval;
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}
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static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion)
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{
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int fd, len = strlen(refname);
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char buffer[128], *p;
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if (recursion > MAXDEPTH || len > MAXREFLEN)
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return -1;
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memcpy(name + pathlen, refname, len+1);
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fd = open(name, O_RDONLY);
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if (fd < 0)
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return resolve_gitlink_packed_ref(name, pathlen, refname, result);
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len = read(fd, buffer, sizeof(buffer)-1);
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close(fd);
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if (len < 0)
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return -1;
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while (len && isspace(buffer[len-1]))
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len--;
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buffer[len] = 0;
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/* Was it a detached head or an old-fashioned symlink? */
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if (!get_sha1_hex(buffer, result))
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return 0;
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/* Symref? */
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if (strncmp(buffer, "ref:", 4))
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return -1;
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p = buffer + 4;
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while (isspace(*p))
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p++;
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return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1);
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}
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int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
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{
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int len = strlen(path), retval;
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char *gitdir;
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while (len && path[len-1] == '/')
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len--;
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if (!len)
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return -1;
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gitdir = xmalloc(len + MAXREFLEN + 8);
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memcpy(gitdir, path, len);
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memcpy(gitdir + len, "/.git/", 7);
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retval = resolve_gitlink_ref_recursive(gitdir, len+6, refname, result, 0);
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free(gitdir);
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return retval;
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}
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const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
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{
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int depth = MAXDEPTH, len;
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char buffer[256];
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static char ref_buffer[256];
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if (flag)
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*flag = 0;
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for (;;) {
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const char *path = git_path("%s", ref);
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struct stat st;
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char *buf;
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int fd;
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if (--depth < 0)
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return NULL;
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/* Special case: non-existing file.
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* Not having the refs/heads/new-branch is OK
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* if we are writing into it, so is .git/HEAD
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* that points at refs/heads/master still to be
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* born. It is NOT OK if we are resolving for
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* reading.
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*/
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if (lstat(path, &st) < 0) {
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struct ref_list *list = get_packed_refs();
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while (list) {
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if (!strcmp(ref, list->name)) {
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hashcpy(sha1, list->sha1);
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if (flag)
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*flag |= REF_ISPACKED;
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return ref;
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}
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list = list->next;
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}
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if (reading || errno != ENOENT)
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return NULL;
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hashclr(sha1);
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return ref;
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}
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/* Follow "normalized" - ie "refs/.." symlinks by hand */
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if (S_ISLNK(st.st_mode)) {
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len = readlink(path, buffer, sizeof(buffer)-1);
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if (len >= 5 && !memcmp("refs/", buffer, 5)) {
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buffer[len] = 0;
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strcpy(ref_buffer, buffer);
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ref = ref_buffer;
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if (flag)
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*flag |= REF_ISSYMREF;
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continue;
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}
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}
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/* Is it a directory? */
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if (S_ISDIR(st.st_mode)) {
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errno = EISDIR;
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return NULL;
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}
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/*
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* Anything else, just open it and try to use it as
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* a ref
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*/
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return NULL;
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len = read_in_full(fd, buffer, sizeof(buffer)-1);
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close(fd);
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/*
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* Is it a symbolic ref?
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*/
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if (len < 4 || memcmp("ref:", buffer, 4))
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break;
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buf = buffer + 4;
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len -= 4;
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while (len && isspace(*buf))
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buf++, len--;
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while (len && isspace(buf[len-1]))
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len--;
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buf[len] = 0;
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memcpy(ref_buffer, buf, len + 1);
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ref = ref_buffer;
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if (flag)
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*flag |= REF_ISSYMREF;
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}
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if (len < 40 || get_sha1_hex(buffer, sha1))
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return NULL;
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return ref;
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}
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int read_ref(const char *ref, unsigned char *sha1)
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{
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if (resolve_ref(ref, sha1, 1, NULL))
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return 0;
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return -1;
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}
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static int do_one_ref(const char *base, each_ref_fn fn, int trim,
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void *cb_data, struct ref_list *entry)
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{
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if (strncmp(base, entry->name, trim))
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return 0;
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if (is_null_sha1(entry->sha1))
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return 0;
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if (!has_sha1_file(entry->sha1)) {
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error("%s does not point to a valid object!", entry->name);
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return 0;
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}
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current_ref = entry;
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return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
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}
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int peel_ref(const char *ref, unsigned char *sha1)
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{
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int flag;
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unsigned char base[20];
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struct object *o;
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if (current_ref && (current_ref->name == ref
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|| !strcmp(current_ref->name, ref))) {
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if (current_ref->flag & REF_KNOWS_PEELED) {
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hashcpy(sha1, current_ref->peeled);
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return 0;
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}
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hashcpy(base, current_ref->sha1);
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goto fallback;
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}
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if (!resolve_ref(ref, base, 1, &flag))
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return -1;
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if ((flag & REF_ISPACKED)) {
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struct ref_list *list = get_packed_refs();
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while (list) {
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if (!strcmp(list->name, ref)) {
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if (list->flag & REF_KNOWS_PEELED) {
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hashcpy(sha1, list->peeled);
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return 0;
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}
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/* older pack-refs did not leave peeled ones */
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break;
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}
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list = list->next;
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}
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}
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fallback:
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o = parse_object(base);
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if (o && o->type == OBJ_TAG) {
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o = deref_tag(o, ref, 0);
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if (o) {
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hashcpy(sha1, o->sha1);
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return 0;
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}
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}
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return -1;
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}
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static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
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void *cb_data)
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{
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int retval = 0;
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struct ref_list *packed = get_packed_refs();
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struct ref_list *loose = get_loose_refs();
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while (packed && loose) {
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struct ref_list *entry;
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int cmp = strcmp(packed->name, loose->name);
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if (!cmp) {
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packed = packed->next;
|
|
continue;
|
|
}
|
|
if (cmp > 0) {
|
|
entry = loose;
|
|
loose = loose->next;
|
|
} else {
|
|
entry = packed;
|
|
packed = packed->next;
|
|
}
|
|
retval = do_one_ref(base, fn, trim, cb_data, entry);
|
|
if (retval)
|
|
goto end_each;
|
|
}
|
|
|
|
for (packed = packed ? packed : loose; packed; packed = packed->next) {
|
|
retval = do_one_ref(base, fn, trim, cb_data, packed);
|
|
if (retval)
|
|
goto end_each;
|
|
}
|
|
|
|
end_each:
|
|
current_ref = NULL;
|
|
return retval;
|
|
}
|
|
|
|
int head_ref(each_ref_fn fn, void *cb_data)
|
|
{
|
|
unsigned char sha1[20];
|
|
int flag;
|
|
|
|
if (resolve_ref("HEAD", sha1, 1, &flag))
|
|
return fn("HEAD", sha1, flag, cb_data);
|
|
return 0;
|
|
}
|
|
|
|
int for_each_ref(each_ref_fn fn, void *cb_data)
|
|
{
|
|
return do_for_each_ref("refs/", fn, 0, cb_data);
|
|
}
|
|
|
|
int for_each_tag_ref(each_ref_fn fn, void *cb_data)
|
|
{
|
|
return do_for_each_ref("refs/tags/", fn, 10, cb_data);
|
|
}
|
|
|
|
int for_each_branch_ref(each_ref_fn fn, void *cb_data)
|
|
{
|
|
return do_for_each_ref("refs/heads/", fn, 11, cb_data);
|
|
}
|
|
|
|
int for_each_remote_ref(each_ref_fn fn, void *cb_data)
|
|
{
|
|
return do_for_each_ref("refs/remotes/", fn, 13, cb_data);
|
|
}
|
|
|
|
/*
|
|
* Make sure "ref" is something reasonable to have under ".git/refs/";
|
|
* We do not like it if:
|
|
*
|
|
* - any path component of it begins with ".", or
|
|
* - it has double dots "..", or
|
|
* - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
|
|
* - it ends with a "/".
|
|
*/
|
|
|
|
static inline int bad_ref_char(int ch)
|
|
{
|
|
if (((unsigned) ch) <= ' ' ||
|
|
ch == '~' || ch == '^' || ch == ':')
|
|
return 1;
|
|
/* 2.13 Pattern Matching Notation */
|
|
if (ch == '?' || ch == '[') /* Unsupported */
|
|
return 1;
|
|
if (ch == '*') /* Supported at the end */
|
|
return 2;
|
|
return 0;
|
|
}
|
|
|
|
int check_ref_format(const char *ref)
|
|
{
|
|
int ch, level, bad_type;
|
|
const char *cp = ref;
|
|
|
|
level = 0;
|
|
while (1) {
|
|
while ((ch = *cp++) == '/')
|
|
; /* tolerate duplicated slashes */
|
|
if (!ch)
|
|
/* should not end with slashes */
|
|
return CHECK_REF_FORMAT_ERROR;
|
|
|
|
/* we are at the beginning of the path component */
|
|
if (ch == '.')
|
|
return CHECK_REF_FORMAT_ERROR;
|
|
bad_type = bad_ref_char(ch);
|
|
if (bad_type) {
|
|
return (bad_type == 2 && !*cp)
|
|
? CHECK_REF_FORMAT_WILDCARD
|
|
: CHECK_REF_FORMAT_ERROR;
|
|
}
|
|
|
|
/* scan the rest of the path component */
|
|
while ((ch = *cp++) != 0) {
|
|
bad_type = bad_ref_char(ch);
|
|
if (bad_type) {
|
|
return (bad_type == 2 && !*cp)
|
|
? CHECK_REF_FORMAT_WILDCARD
|
|
: CHECK_REF_FORMAT_ERROR;
|
|
}
|
|
if (ch == '/')
|
|
break;
|
|
if (ch == '.' && *cp == '.')
|
|
return CHECK_REF_FORMAT_ERROR;
|
|
}
|
|
level++;
|
|
if (!ch) {
|
|
if (level < 2)
|
|
return CHECK_REF_FORMAT_ONELEVEL;
|
|
return CHECK_REF_FORMAT_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
const char *ref_rev_parse_rules[] = {
|
|
"%.*s",
|
|
"refs/%.*s",
|
|
"refs/tags/%.*s",
|
|
"refs/heads/%.*s",
|
|
"refs/remotes/%.*s",
|
|
"refs/remotes/%.*s/HEAD",
|
|
NULL
|
|
};
|
|
|
|
const char *ref_fetch_rules[] = {
|
|
"%.*s",
|
|
"refs/%.*s",
|
|
"refs/heads/%.*s",
|
|
NULL
|
|
};
|
|
|
|
int refname_match(const char *abbrev_name, const char *full_name, const char **rules)
|
|
{
|
|
const char **p;
|
|
const int abbrev_name_len = strlen(abbrev_name);
|
|
|
|
for (p = rules; *p; p++) {
|
|
if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ref_lock *verify_lock(struct ref_lock *lock,
|
|
const unsigned char *old_sha1, int mustexist)
|
|
{
|
|
if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
|
|
error("Can't verify ref %s", lock->ref_name);
|
|
unlock_ref(lock);
|
|
return NULL;
|
|
}
|
|
if (hashcmp(lock->old_sha1, old_sha1)) {
|
|
error("Ref %s is at %s but expected %s", lock->ref_name,
|
|
sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1));
|
|
unlock_ref(lock);
|
|
return NULL;
|
|
}
|
|
return lock;
|
|
}
|
|
|
|
static int remove_empty_directories(const char *file)
|
|
{
|
|
/* we want to create a file but there is a directory there;
|
|
* if that is an empty directory (or a directory that contains
|
|
* only empty directories), remove them.
|
|
*/
|
|
struct strbuf path;
|
|
int result;
|
|
|
|
strbuf_init(&path, 20);
|
|
strbuf_addstr(&path, file);
|
|
|
|
result = remove_dir_recursively(&path, 1);
|
|
|
|
strbuf_release(&path);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int is_refname_available(const char *ref, const char *oldref,
|
|
struct ref_list *list, int quiet)
|
|
{
|
|
int namlen = strlen(ref); /* e.g. 'foo/bar' */
|
|
while (list) {
|
|
/* list->name could be 'foo' or 'foo/bar/baz' */
|
|
if (!oldref || strcmp(oldref, list->name)) {
|
|
int len = strlen(list->name);
|
|
int cmplen = (namlen < len) ? namlen : len;
|
|
const char *lead = (namlen < len) ? list->name : ref;
|
|
if (!strncmp(ref, list->name, cmplen) &&
|
|
lead[cmplen] == '/') {
|
|
if (!quiet)
|
|
error("'%s' exists; cannot create '%s'",
|
|
list->name, ref);
|
|
return 0;
|
|
}
|
|
}
|
|
list = list->next;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
|
|
{
|
|
char *ref_file;
|
|
const char *orig_ref = ref;
|
|
struct ref_lock *lock;
|
|
struct stat st;
|
|
int last_errno = 0;
|
|
int type;
|
|
int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
|
|
|
|
lock = xcalloc(1, sizeof(struct ref_lock));
|
|
lock->lock_fd = -1;
|
|
|
|
ref = resolve_ref(ref, lock->old_sha1, mustexist, &type);
|
|
if (!ref && errno == EISDIR) {
|
|
/* we are trying to lock foo but we used to
|
|
* have foo/bar which now does not exist;
|
|
* it is normal for the empty directory 'foo'
|
|
* to remain.
|
|
*/
|
|
ref_file = git_path("%s", orig_ref);
|
|
if (remove_empty_directories(ref_file)) {
|
|
last_errno = errno;
|
|
error("there are still refs under '%s'", orig_ref);
|
|
goto error_return;
|
|
}
|
|
ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type);
|
|
}
|
|
if (type_p)
|
|
*type_p = type;
|
|
if (!ref) {
|
|
last_errno = errno;
|
|
error("unable to resolve reference %s: %s",
|
|
orig_ref, strerror(errno));
|
|
goto error_return;
|
|
}
|
|
/* When the ref did not exist and we are creating it,
|
|
* make sure there is no existing ref that is packed
|
|
* whose name begins with our refname, nor a ref whose
|
|
* name is a proper prefix of our refname.
|
|
*/
|
|
if (is_null_sha1(lock->old_sha1) &&
|
|
!is_refname_available(ref, NULL, get_packed_refs(), 0))
|
|
goto error_return;
|
|
|
|
lock->lk = xcalloc(1, sizeof(struct lock_file));
|
|
|
|
if (flags & REF_NODEREF)
|
|
ref = orig_ref;
|
|
lock->ref_name = xstrdup(ref);
|
|
lock->orig_ref_name = xstrdup(orig_ref);
|
|
ref_file = git_path("%s", ref);
|
|
if (lstat(ref_file, &st) && errno == ENOENT)
|
|
lock->force_write = 1;
|
|
if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
|
|
lock->force_write = 1;
|
|
|
|
if (safe_create_leading_directories(ref_file)) {
|
|
last_errno = errno;
|
|
error("unable to create directory for %s", ref_file);
|
|
goto error_return;
|
|
}
|
|
lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, 1);
|
|
|
|
return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
|
|
|
|
error_return:
|
|
unlock_ref(lock);
|
|
errno = last_errno;
|
|
return NULL;
|
|
}
|
|
|
|
struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
|
|
{
|
|
char refpath[PATH_MAX];
|
|
if (check_ref_format(ref))
|
|
return NULL;
|
|
strcpy(refpath, mkpath("refs/%s", ref));
|
|
return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
|
|
}
|
|
|
|
struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
|
|
{
|
|
switch (check_ref_format(ref)) {
|
|
default:
|
|
return NULL;
|
|
case 0:
|
|
case CHECK_REF_FORMAT_ONELEVEL:
|
|
return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
|
|
}
|
|
}
|
|
|
|
static struct lock_file packlock;
|
|
|
|
static int repack_without_ref(const char *refname)
|
|
{
|
|
struct ref_list *list, *packed_ref_list;
|
|
int fd;
|
|
int found = 0;
|
|
|
|
packed_ref_list = get_packed_refs();
|
|
for (list = packed_ref_list; list; list = list->next) {
|
|
if (!strcmp(refname, list->name)) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
return 0;
|
|
fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
|
|
if (fd < 0)
|
|
return error("cannot delete '%s' from packed refs", refname);
|
|
|
|
for (list = packed_ref_list; list; list = list->next) {
|
|
char line[PATH_MAX + 100];
|
|
int len;
|
|
|
|
if (!strcmp(refname, list->name))
|
|
continue;
|
|
len = snprintf(line, sizeof(line), "%s %s\n",
|
|
sha1_to_hex(list->sha1), list->name);
|
|
/* this should not happen but just being defensive */
|
|
if (len > sizeof(line))
|
|
die("too long a refname '%s'", list->name);
|
|
write_or_die(fd, line, len);
|
|
}
|
|
return commit_lock_file(&packlock);
|
|
}
|
|
|
|
int delete_ref(const char *refname, const unsigned char *sha1)
|
|
{
|
|
struct ref_lock *lock;
|
|
int err, i, ret = 0, flag = 0;
|
|
|
|
lock = lock_ref_sha1_basic(refname, sha1, 0, &flag);
|
|
if (!lock)
|
|
return 1;
|
|
if (!(flag & REF_ISPACKED)) {
|
|
/* loose */
|
|
i = strlen(lock->lk->filename) - 5; /* .lock */
|
|
lock->lk->filename[i] = 0;
|
|
err = unlink(lock->lk->filename);
|
|
if (err) {
|
|
ret = 1;
|
|
error("unlink(%s) failed: %s",
|
|
lock->lk->filename, strerror(errno));
|
|
}
|
|
lock->lk->filename[i] = '.';
|
|
}
|
|
/* removing the loose one could have resurrected an earlier
|
|
* packed one. Also, if it was not loose we need to repack
|
|
* without it.
|
|
*/
|
|
ret |= repack_without_ref(refname);
|
|
|
|
err = unlink(git_path("logs/%s", lock->ref_name));
|
|
if (err && errno != ENOENT)
|
|
fprintf(stderr, "warning: unlink(%s) failed: %s",
|
|
git_path("logs/%s", lock->ref_name), strerror(errno));
|
|
invalidate_cached_refs();
|
|
unlock_ref(lock);
|
|
return ret;
|
|
}
|
|
|
|
int rename_ref(const char *oldref, const char *newref, const char *logmsg)
|
|
{
|
|
static const char renamed_ref[] = "RENAMED-REF";
|
|
unsigned char sha1[20], orig_sha1[20];
|
|
int flag = 0, logmoved = 0;
|
|
struct ref_lock *lock;
|
|
struct stat loginfo;
|
|
int log = !lstat(git_path("logs/%s", oldref), &loginfo);
|
|
|
|
if (S_ISLNK(loginfo.st_mode))
|
|
return error("reflog for %s is a symlink", oldref);
|
|
|
|
if (!resolve_ref(oldref, orig_sha1, 1, &flag))
|
|
return error("refname %s not found", oldref);
|
|
|
|
if (!is_refname_available(newref, oldref, get_packed_refs(), 0))
|
|
return 1;
|
|
|
|
if (!is_refname_available(newref, oldref, get_loose_refs(), 0))
|
|
return 1;
|
|
|
|
lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
|
|
if (!lock)
|
|
return error("unable to lock %s", renamed_ref);
|
|
lock->force_write = 1;
|
|
if (write_ref_sha1(lock, orig_sha1, logmsg))
|
|
return error("unable to save current sha1 in %s", renamed_ref);
|
|
|
|
if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log")))
|
|
return error("unable to move logfile logs/%s to tmp-renamed-log: %s",
|
|
oldref, strerror(errno));
|
|
|
|
if (delete_ref(oldref, orig_sha1)) {
|
|
error("unable to delete old %s", oldref);
|
|
goto rollback;
|
|
}
|
|
|
|
if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1)) {
|
|
if (errno==EISDIR) {
|
|
if (remove_empty_directories(git_path("%s", newref))) {
|
|
error("Directory not empty: %s", newref);
|
|
goto rollback;
|
|
}
|
|
} else {
|
|
error("unable to delete existing %s", newref);
|
|
goto rollback;
|
|
}
|
|
}
|
|
|
|
if (log && safe_create_leading_directories(git_path("logs/%s", newref))) {
|
|
error("unable to create directory for %s", newref);
|
|
goto rollback;
|
|
}
|
|
|
|
retry:
|
|
if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) {
|
|
if (errno==EISDIR || errno==ENOTDIR) {
|
|
/*
|
|
* rename(a, b) when b is an existing
|
|
* directory ought to result in ISDIR, but
|
|
* Solaris 5.8 gives ENOTDIR. Sheesh.
|
|
*/
|
|
if (remove_empty_directories(git_path("logs/%s", newref))) {
|
|
error("Directory not empty: logs/%s", newref);
|
|
goto rollback;
|
|
}
|
|
goto retry;
|
|
} else {
|
|
error("unable to move logfile tmp-renamed-log to logs/%s: %s",
|
|
newref, strerror(errno));
|
|
goto rollback;
|
|
}
|
|
}
|
|
logmoved = log;
|
|
|
|
lock = lock_ref_sha1_basic(newref, NULL, 0, NULL);
|
|
if (!lock) {
|
|
error("unable to lock %s for update", newref);
|
|
goto rollback;
|
|
}
|
|
|
|
lock->force_write = 1;
|
|
hashcpy(lock->old_sha1, orig_sha1);
|
|
if (write_ref_sha1(lock, orig_sha1, logmsg)) {
|
|
error("unable to write current sha1 into %s", newref);
|
|
goto rollback;
|
|
}
|
|
|
|
return 0;
|
|
|
|
rollback:
|
|
lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL);
|
|
if (!lock) {
|
|
error("unable to lock %s for rollback", oldref);
|
|
goto rollbacklog;
|
|
}
|
|
|
|
lock->force_write = 1;
|
|
flag = log_all_ref_updates;
|
|
log_all_ref_updates = 0;
|
|
if (write_ref_sha1(lock, orig_sha1, NULL))
|
|
error("unable to write current sha1 into %s", oldref);
|
|
log_all_ref_updates = flag;
|
|
|
|
rollbacklog:
|
|
if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref)))
|
|
error("unable to restore logfile %s from %s: %s",
|
|
oldref, newref, strerror(errno));
|
|
if (!logmoved && log &&
|
|
rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref)))
|
|
error("unable to restore logfile %s from tmp-renamed-log: %s",
|
|
oldref, strerror(errno));
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int close_ref(struct ref_lock *lock)
|
|
{
|
|
if (close_lock_file(lock->lk))
|
|
return -1;
|
|
lock->lock_fd = -1;
|
|
return 0;
|
|
}
|
|
|
|
static int commit_ref(struct ref_lock *lock)
|
|
{
|
|
if (commit_lock_file(lock->lk))
|
|
return -1;
|
|
lock->lock_fd = -1;
|
|
return 0;
|
|
}
|
|
|
|
void unlock_ref(struct ref_lock *lock)
|
|
{
|
|
/* Do not free lock->lk -- atexit() still looks at them */
|
|
if (lock->lk)
|
|
rollback_lock_file(lock->lk);
|
|
free(lock->ref_name);
|
|
free(lock->orig_ref_name);
|
|
free(lock);
|
|
}
|
|
|
|
/*
|
|
* copy the reflog message msg to buf, which has been allocated sufficiently
|
|
* large, while cleaning up the whitespaces. Especially, convert LF to space,
|
|
* because reflog file is one line per entry.
|
|
*/
|
|
static int copy_msg(char *buf, const char *msg)
|
|
{
|
|
char *cp = buf;
|
|
char c;
|
|
int wasspace = 1;
|
|
|
|
*cp++ = '\t';
|
|
while ((c = *msg++)) {
|
|
if (wasspace && isspace(c))
|
|
continue;
|
|
wasspace = isspace(c);
|
|
if (wasspace)
|
|
c = ' ';
|
|
*cp++ = c;
|
|
}
|
|
while (buf < cp && isspace(cp[-1]))
|
|
cp--;
|
|
*cp++ = '\n';
|
|
return cp - buf;
|
|
}
|
|
|
|
static int log_ref_write(const char *ref_name, const unsigned char *old_sha1,
|
|
const unsigned char *new_sha1, const char *msg)
|
|
{
|
|
int logfd, written, oflags = O_APPEND | O_WRONLY;
|
|
unsigned maxlen, len;
|
|
int msglen;
|
|
char *log_file, *logrec;
|
|
const char *committer;
|
|
|
|
if (log_all_ref_updates < 0)
|
|
log_all_ref_updates = !is_bare_repository();
|
|
|
|
log_file = git_path("logs/%s", ref_name);
|
|
|
|
if (log_all_ref_updates &&
|
|
(!prefixcmp(ref_name, "refs/heads/") ||
|
|
!prefixcmp(ref_name, "refs/remotes/") ||
|
|
!strcmp(ref_name, "HEAD"))) {
|
|
if (safe_create_leading_directories(log_file) < 0)
|
|
return error("unable to create directory for %s",
|
|
log_file);
|
|
oflags |= O_CREAT;
|
|
}
|
|
|
|
logfd = open(log_file, oflags, 0666);
|
|
if (logfd < 0) {
|
|
if (!(oflags & O_CREAT) && errno == ENOENT)
|
|
return 0;
|
|
|
|
if ((oflags & O_CREAT) && errno == EISDIR) {
|
|
if (remove_empty_directories(log_file)) {
|
|
return error("There are still logs under '%s'",
|
|
log_file);
|
|
}
|
|
logfd = open(log_file, oflags, 0666);
|
|
}
|
|
|
|
if (logfd < 0)
|
|
return error("Unable to append to %s: %s",
|
|
log_file, strerror(errno));
|
|
}
|
|
|
|
adjust_shared_perm(log_file);
|
|
|
|
msglen = msg ? strlen(msg) : 0;
|
|
committer = git_committer_info(0);
|
|
maxlen = strlen(committer) + msglen + 100;
|
|
logrec = xmalloc(maxlen);
|
|
len = sprintf(logrec, "%s %s %s\n",
|
|
sha1_to_hex(old_sha1),
|
|
sha1_to_hex(new_sha1),
|
|
committer);
|
|
if (msglen)
|
|
len += copy_msg(logrec + len - 1, msg) - 1;
|
|
written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
|
|
free(logrec);
|
|
if (close(logfd) != 0 || written != len)
|
|
return error("Unable to append to %s", log_file);
|
|
return 0;
|
|
}
|
|
|
|
static int is_branch(const char *refname)
|
|
{
|
|
return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/");
|
|
}
|
|
|
|
int write_ref_sha1(struct ref_lock *lock,
|
|
const unsigned char *sha1, const char *logmsg)
|
|
{
|
|
static char term = '\n';
|
|
struct object *o;
|
|
|
|
if (!lock)
|
|
return -1;
|
|
if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) {
|
|
unlock_ref(lock);
|
|
return 0;
|
|
}
|
|
o = parse_object(sha1);
|
|
if (!o) {
|
|
error("Trying to write ref %s with nonexistant object %s",
|
|
lock->ref_name, sha1_to_hex(sha1));
|
|
unlock_ref(lock);
|
|
return -1;
|
|
}
|
|
if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) {
|
|
error("Trying to write non-commit object %s to branch %s",
|
|
sha1_to_hex(sha1), lock->ref_name);
|
|
unlock_ref(lock);
|
|
return -1;
|
|
}
|
|
if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
|
|
write_in_full(lock->lock_fd, &term, 1) != 1
|
|
|| close_ref(lock) < 0) {
|
|
error("Couldn't write %s", lock->lk->filename);
|
|
unlock_ref(lock);
|
|
return -1;
|
|
}
|
|
invalidate_cached_refs();
|
|
if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
|
|
(strcmp(lock->ref_name, lock->orig_ref_name) &&
|
|
log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) {
|
|
unlock_ref(lock);
|
|
return -1;
|
|
}
|
|
if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
|
|
/*
|
|
* Special hack: If a branch is updated directly and HEAD
|
|
* points to it (may happen on the remote side of a push
|
|
* for example) then logically the HEAD reflog should be
|
|
* updated too.
|
|
* A generic solution implies reverse symref information,
|
|
* but finding all symrefs pointing to the given branch
|
|
* would be rather costly for this rare event (the direct
|
|
* update of a branch) to be worth it. So let's cheat and
|
|
* check with HEAD only which should cover 99% of all usage
|
|
* scenarios (even 100% of the default ones).
|
|
*/
|
|
unsigned char head_sha1[20];
|
|
int head_flag;
|
|
const char *head_ref;
|
|
head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag);
|
|
if (head_ref && (head_flag & REF_ISSYMREF) &&
|
|
!strcmp(head_ref, lock->ref_name))
|
|
log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
|
|
}
|
|
if (commit_ref(lock)) {
|
|
error("Couldn't set %s", lock->ref_name);
|
|
unlock_ref(lock);
|
|
return -1;
|
|
}
|
|
unlock_ref(lock);
|
|
return 0;
|
|
}
|
|
|
|
int create_symref(const char *ref_target, const char *refs_heads_master,
|
|
const char *logmsg)
|
|
{
|
|
const char *lockpath;
|
|
char ref[1000];
|
|
int fd, len, written;
|
|
char *git_HEAD = xstrdup(git_path("%s", ref_target));
|
|
unsigned char old_sha1[20], new_sha1[20];
|
|
|
|
if (logmsg && read_ref(ref_target, old_sha1))
|
|
hashclr(old_sha1);
|
|
|
|
if (safe_create_leading_directories(git_HEAD) < 0)
|
|
return error("unable to create directory for %s", git_HEAD);
|
|
|
|
#ifndef NO_SYMLINK_HEAD
|
|
if (prefer_symlink_refs) {
|
|
unlink(git_HEAD);
|
|
if (!symlink(refs_heads_master, git_HEAD))
|
|
goto done;
|
|
fprintf(stderr, "no symlink - falling back to symbolic ref\n");
|
|
}
|
|
#endif
|
|
|
|
len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
|
|
if (sizeof(ref) <= len) {
|
|
error("refname too long: %s", refs_heads_master);
|
|
goto error_free_return;
|
|
}
|
|
lockpath = mkpath("%s.lock", git_HEAD);
|
|
fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
|
|
if (fd < 0) {
|
|
error("Unable to open %s for writing", lockpath);
|
|
goto error_free_return;
|
|
}
|
|
written = write_in_full(fd, ref, len);
|
|
if (close(fd) != 0 || written != len) {
|
|
error("Unable to write to %s", lockpath);
|
|
goto error_unlink_return;
|
|
}
|
|
if (rename(lockpath, git_HEAD) < 0) {
|
|
error("Unable to create %s", git_HEAD);
|
|
goto error_unlink_return;
|
|
}
|
|
if (adjust_shared_perm(git_HEAD)) {
|
|
error("Unable to fix permissions on %s", lockpath);
|
|
error_unlink_return:
|
|
unlink(lockpath);
|
|
error_free_return:
|
|
free(git_HEAD);
|
|
return -1;
|
|
}
|
|
|
|
#ifndef NO_SYMLINK_HEAD
|
|
done:
|
|
#endif
|
|
if (logmsg && !read_ref(refs_heads_master, new_sha1))
|
|
log_ref_write(ref_target, old_sha1, new_sha1, logmsg);
|
|
|
|
free(git_HEAD);
|
|
return 0;
|
|
}
|
|
|
|
static char *ref_msg(const char *line, const char *endp)
|
|
{
|
|
const char *ep;
|
|
line += 82;
|
|
ep = memchr(line, '\n', endp - line);
|
|
if (!ep)
|
|
ep = endp;
|
|
return xmemdupz(line, ep - line);
|
|
}
|
|
|
|
int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
|
|
{
|
|
const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec;
|
|
char *tz_c;
|
|
int logfd, tz, reccnt = 0;
|
|
struct stat st;
|
|
unsigned long date;
|
|
unsigned char logged_sha1[20];
|
|
void *log_mapped;
|
|
size_t mapsz;
|
|
|
|
logfile = git_path("logs/%s", ref);
|
|
logfd = open(logfile, O_RDONLY, 0);
|
|
if (logfd < 0)
|
|
die("Unable to read log %s: %s", logfile, strerror(errno));
|
|
fstat(logfd, &st);
|
|
if (!st.st_size)
|
|
die("Log %s is empty.", logfile);
|
|
mapsz = xsize_t(st.st_size);
|
|
log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0);
|
|
logdata = log_mapped;
|
|
close(logfd);
|
|
|
|
lastrec = NULL;
|
|
rec = logend = logdata + st.st_size;
|
|
while (logdata < rec) {
|
|
reccnt++;
|
|
if (logdata < rec && *(rec-1) == '\n')
|
|
rec--;
|
|
lastgt = NULL;
|
|
while (logdata < rec && *(rec-1) != '\n') {
|
|
rec--;
|
|
if (*rec == '>')
|
|
lastgt = rec;
|
|
}
|
|
if (!lastgt)
|
|
die("Log %s is corrupt.", logfile);
|
|
date = strtoul(lastgt + 1, &tz_c, 10);
|
|
if (date <= at_time || cnt == 0) {
|
|
tz = strtoul(tz_c, NULL, 10);
|
|
if (msg)
|
|
*msg = ref_msg(rec, logend);
|
|
if (cutoff_time)
|
|
*cutoff_time = date;
|
|
if (cutoff_tz)
|
|
*cutoff_tz = tz;
|
|
if (cutoff_cnt)
|
|
*cutoff_cnt = reccnt - 1;
|
|
if (lastrec) {
|
|
if (get_sha1_hex(lastrec, logged_sha1))
|
|
die("Log %s is corrupt.", logfile);
|
|
if (get_sha1_hex(rec + 41, sha1))
|
|
die("Log %s is corrupt.", logfile);
|
|
if (hashcmp(logged_sha1, sha1)) {
|
|
fprintf(stderr,
|
|
"warning: Log %s has gap after %s.\n",
|
|
logfile, show_date(date, tz, DATE_RFC2822));
|
|
}
|
|
}
|
|
else if (date == at_time) {
|
|
if (get_sha1_hex(rec + 41, sha1))
|
|
die("Log %s is corrupt.", logfile);
|
|
}
|
|
else {
|
|
if (get_sha1_hex(rec + 41, logged_sha1))
|
|
die("Log %s is corrupt.", logfile);
|
|
if (hashcmp(logged_sha1, sha1)) {
|
|
fprintf(stderr,
|
|
"warning: Log %s unexpectedly ended on %s.\n",
|
|
logfile, show_date(date, tz, DATE_RFC2822));
|
|
}
|
|
}
|
|
munmap(log_mapped, mapsz);
|
|
return 0;
|
|
}
|
|
lastrec = rec;
|
|
if (cnt > 0)
|
|
cnt--;
|
|
}
|
|
|
|
rec = logdata;
|
|
while (rec < logend && *rec != '>' && *rec != '\n')
|
|
rec++;
|
|
if (rec == logend || *rec == '\n')
|
|
die("Log %s is corrupt.", logfile);
|
|
date = strtoul(rec + 1, &tz_c, 10);
|
|
tz = strtoul(tz_c, NULL, 10);
|
|
if (get_sha1_hex(logdata, sha1))
|
|
die("Log %s is corrupt.", logfile);
|
|
if (msg)
|
|
*msg = ref_msg(logdata, logend);
|
|
munmap(log_mapped, mapsz);
|
|
|
|
if (cutoff_time)
|
|
*cutoff_time = date;
|
|
if (cutoff_tz)
|
|
*cutoff_tz = tz;
|
|
if (cutoff_cnt)
|
|
*cutoff_cnt = reccnt;
|
|
return 1;
|
|
}
|
|
|
|
int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
|
|
{
|
|
const char *logfile;
|
|
FILE *logfp;
|
|
char buf[1024];
|
|
int ret = 0;
|
|
|
|
logfile = git_path("logs/%s", ref);
|
|
logfp = fopen(logfile, "r");
|
|
if (!logfp)
|
|
return -1;
|
|
while (fgets(buf, sizeof(buf), logfp)) {
|
|
unsigned char osha1[20], nsha1[20];
|
|
char *email_end, *message;
|
|
unsigned long timestamp;
|
|
int len, tz;
|
|
|
|
/* old SP new SP name <email> SP time TAB msg LF */
|
|
len = strlen(buf);
|
|
if (len < 83 || buf[len-1] != '\n' ||
|
|
get_sha1_hex(buf, osha1) || buf[40] != ' ' ||
|
|
get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' ||
|
|
!(email_end = strchr(buf + 82, '>')) ||
|
|
email_end[1] != ' ' ||
|
|
!(timestamp = strtoul(email_end + 2, &message, 10)) ||
|
|
!message || message[0] != ' ' ||
|
|
(message[1] != '+' && message[1] != '-') ||
|
|
!isdigit(message[2]) || !isdigit(message[3]) ||
|
|
!isdigit(message[4]) || !isdigit(message[5]))
|
|
continue; /* corrupt? */
|
|
email_end[1] = '\0';
|
|
tz = strtol(message + 1, NULL, 10);
|
|
if (message[6] != '\t')
|
|
message += 6;
|
|
else
|
|
message += 7;
|
|
ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data);
|
|
if (ret)
|
|
break;
|
|
}
|
|
fclose(logfp);
|
|
return ret;
|
|
}
|
|
|
|
static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
|
|
{
|
|
DIR *dir = opendir(git_path("logs/%s", base));
|
|
int retval = 0;
|
|
|
|
if (dir) {
|
|
struct dirent *de;
|
|
int baselen = strlen(base);
|
|
char *log = xmalloc(baselen + 257);
|
|
|
|
memcpy(log, base, baselen);
|
|
if (baselen && base[baselen-1] != '/')
|
|
log[baselen++] = '/';
|
|
|
|
while ((de = readdir(dir)) != NULL) {
|
|
struct stat st;
|
|
int namelen;
|
|
|
|
if (de->d_name[0] == '.')
|
|
continue;
|
|
namelen = strlen(de->d_name);
|
|
if (namelen > 255)
|
|
continue;
|
|
if (has_extension(de->d_name, ".lock"))
|
|
continue;
|
|
memcpy(log + baselen, de->d_name, namelen+1);
|
|
if (stat(git_path("logs/%s", log), &st) < 0)
|
|
continue;
|
|
if (S_ISDIR(st.st_mode)) {
|
|
retval = do_for_each_reflog(log, fn, cb_data);
|
|
} else {
|
|
unsigned char sha1[20];
|
|
if (!resolve_ref(log, sha1, 0, NULL))
|
|
retval = error("bad ref for %s", log);
|
|
else
|
|
retval = fn(log, sha1, 0, cb_data);
|
|
}
|
|
if (retval)
|
|
break;
|
|
}
|
|
free(log);
|
|
closedir(dir);
|
|
}
|
|
else if (*base)
|
|
return errno;
|
|
return retval;
|
|
}
|
|
|
|
int for_each_reflog(each_ref_fn fn, void *cb_data)
|
|
{
|
|
return do_for_each_reflog("", fn, cb_data);
|
|
}
|
|
|
|
int update_ref(const char *action, const char *refname,
|
|
const unsigned char *sha1, const unsigned char *oldval,
|
|
int flags, enum action_on_err onerr)
|
|
{
|
|
static struct ref_lock *lock;
|
|
lock = lock_any_ref_for_update(refname, oldval, flags);
|
|
if (!lock) {
|
|
const char *str = "Cannot lock the ref '%s'.";
|
|
switch (onerr) {
|
|
case MSG_ON_ERR: error(str, refname); break;
|
|
case DIE_ON_ERR: die(str, refname); break;
|
|
case QUIET_ON_ERR: break;
|
|
}
|
|
return 1;
|
|
}
|
|
if (write_ref_sha1(lock, sha1, action) < 0) {
|
|
const char *str = "Cannot update the ref '%s'.";
|
|
switch (onerr) {
|
|
case MSG_ON_ERR: error(str, refname); break;
|
|
case DIE_ON_ERR: die(str, refname); break;
|
|
case QUIET_ON_ERR: break;
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct ref *find_ref_by_name(struct ref *list, const char *name)
|
|
{
|
|
for ( ; list; list = list->next)
|
|
if (!strcmp(list->name, name))
|
|
return list;
|
|
return NULL;
|
|
}
|