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1580 lines
37 KiB
1580 lines
37 KiB
#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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|
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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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|
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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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|
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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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|
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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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|
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return line; |
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} |
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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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|
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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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|
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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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|
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if (!list) |
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return list; |
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|
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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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|
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psize = 0; |
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|
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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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|
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while (p) { |
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merge_count++; |
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|
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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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|
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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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|
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e->next = NULL; |
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|
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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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|
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p = q; |
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}; |
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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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|
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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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|
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static struct ref_list *extra_refs; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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void add_extra_ref(const char *name, const unsigned char *sha1, int flag) |
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{ |
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extra_refs = add_ref(name, sha1, flag, extra_refs, NULL); |
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} |
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|
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void clear_extra_refs(void) |
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{ |
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free_ref_list(extra_refs); |
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extra_refs = NULL; |
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} |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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? */ |
|
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; |
|
while (isspace(*p)) |
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p++; |
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|
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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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const char *tmp; |
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|
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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; |
|
gitdir = xmalloc(len + MAXREFLEN + 8); |
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memcpy(gitdir, path, len); |
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memcpy(gitdir + len, "/.git", 6); |
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len += 5; |
|
|
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tmp = read_gitfile_gently(gitdir); |
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if (tmp) { |
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free(gitdir); |
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len = strlen(tmp); |
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gitdir = xmalloc(len + MAXREFLEN + 3); |
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memcpy(gitdir, tmp, len); |
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} |
|
gitdir[len] = '/'; |
|
gitdir[++len] = '\0'; |
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retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0); |
|
free(gitdir); |
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return retval; |
|
} |
|
|
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const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag) |
|
{ |
|
int depth = MAXDEPTH; |
|
ssize_t len; |
|
char buffer[256]; |
|
static char ref_buffer[256]; |
|
|
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if (flag) |
|
*flag = 0; |
|
|
|
for (;;) { |
|
char path[PATH_MAX]; |
|
struct stat st; |
|
char *buf; |
|
int fd; |
|
|
|
if (--depth < 0) |
|
return NULL; |
|
|
|
git_snpath(path, sizeof(path), "%s", ref); |
|
/* Special case: non-existing file. |
|
* Not having the refs/heads/new-branch is OK |
|
* if we are writing into it, so is .git/HEAD |
|
* that points at refs/heads/master still to be |
|
* born. It is NOT OK if we are resolving for |
|
* reading. |
|
*/ |
|
if (lstat(path, &st) < 0) { |
|
struct ref_list *list = get_packed_refs(); |
|
while (list) { |
|
if (!strcmp(ref, list->name)) { |
|
hashcpy(sha1, list->sha1); |
|
if (flag) |
|
*flag |= REF_ISPACKED; |
|
return ref; |
|
} |
|
list = list->next; |
|
} |
|
if (reading || errno != ENOENT) |
|
return NULL; |
|
hashclr(sha1); |
|
return ref; |
|
} |
|
|
|
/* Follow "normalized" - ie "refs/.." symlinks by hand */ |
|
if (S_ISLNK(st.st_mode)) { |
|
len = readlink(path, buffer, sizeof(buffer)-1); |
|
if (len >= 5 && !memcmp("refs/", buffer, 5)) { |
|
buffer[len] = 0; |
|
strcpy(ref_buffer, buffer); |
|
ref = ref_buffer; |
|
if (flag) |
|
*flag |= REF_ISSYMREF; |
|
continue; |
|
} |
|
} |
|
|
|
/* Is it a directory? */ |
|
if (S_ISDIR(st.st_mode)) { |
|
errno = EISDIR; |
|
return NULL; |
|
} |
|
|
|
/* |
|
* Anything else, just open it and try to use it as |
|
* a ref |
|
*/ |
|
fd = open(path, O_RDONLY); |
|
if (fd < 0) |
|
return NULL; |
|
len = read_in_full(fd, buffer, sizeof(buffer)-1); |
|
close(fd); |
|
|
|
/* |
|
* Is it a symbolic ref? |
|
*/ |
|
if (len < 4 || memcmp("ref:", buffer, 4)) |
|
break; |
|
buf = buffer + 4; |
|
len -= 4; |
|
while (len && isspace(*buf)) |
|
buf++, len--; |
|
while (len && isspace(buf[len-1])) |
|
len--; |
|
buf[len] = 0; |
|
memcpy(ref_buffer, buf, len + 1); |
|
ref = ref_buffer; |
|
if (flag) |
|
*flag |= REF_ISSYMREF; |
|
} |
|
if (len < 40 || get_sha1_hex(buffer, sha1)) |
|
return NULL; |
|
return ref; |
|
} |
|
|
|
int read_ref(const char *ref, unsigned char *sha1) |
|
{ |
|
if (resolve_ref(ref, sha1, 1, NULL)) |
|
return 0; |
|
return -1; |
|
} |
|
|
|
static int do_one_ref(const char *base, each_ref_fn fn, int trim, |
|
void *cb_data, struct ref_list *entry) |
|
{ |
|
if (strncmp(base, entry->name, trim)) |
|
return 0; |
|
if (is_null_sha1(entry->sha1)) |
|
return 0; |
|
if (!has_sha1_file(entry->sha1)) { |
|
error("%s does not point to a valid object!", entry->name); |
|
return 0; |
|
} |
|
current_ref = entry; |
|
return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); |
|
} |
|
|
|
int peel_ref(const char *ref, unsigned char *sha1) |
|
{ |
|
int flag; |
|
unsigned char base[20]; |
|
struct object *o; |
|
|
|
if (current_ref && (current_ref->name == ref |
|
|| !strcmp(current_ref->name, ref))) { |
|
if (current_ref->flag & REF_KNOWS_PEELED) { |
|
hashcpy(sha1, current_ref->peeled); |
|
return 0; |
|
} |
|
hashcpy(base, current_ref->sha1); |
|
goto fallback; |
|
} |
|
|
|
if (!resolve_ref(ref, base, 1, &flag)) |
|
return -1; |
|
|
|
if ((flag & REF_ISPACKED)) { |
|
struct ref_list *list = get_packed_refs(); |
|
|
|
while (list) { |
|
if (!strcmp(list->name, ref)) { |
|
if (list->flag & REF_KNOWS_PEELED) { |
|
hashcpy(sha1, list->peeled); |
|
return 0; |
|
} |
|
/* older pack-refs did not leave peeled ones */ |
|
break; |
|
} |
|
list = list->next; |
|
} |
|
} |
|
|
|
fallback: |
|
o = parse_object(base); |
|
if (o && o->type == OBJ_TAG) { |
|
o = deref_tag(o, ref, 0); |
|
if (o) { |
|
hashcpy(sha1, o->sha1); |
|
return 0; |
|
} |
|
} |
|
return -1; |
|
} |
|
|
|
static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, |
|
void *cb_data) |
|
{ |
|
int retval = 0; |
|
struct ref_list *packed = get_packed_refs(); |
|
struct ref_list *loose = get_loose_refs(); |
|
|
|
struct ref_list *extra; |
|
|
|
for (extra = extra_refs; extra; extra = extra->next) |
|
retval = do_one_ref(base, fn, trim, cb_data, extra); |
|
|
|
while (packed && loose) { |
|
struct ref_list *entry; |
|
int cmp = strcmp(packed->name, loose->name); |
|
if (!cmp) { |
|
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; |
|
int last_errno = 0; |
|
int type, lflags; |
|
int mustexist = (old_sha1 && !is_null_sha1(old_sha1)); |
|
int missing = 0; |
|
|
|
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; |
|
} |
|
missing = is_null_sha1(lock->old_sha1); |
|
/* 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 (missing && |
|
!is_refname_available(ref, NULL, get_packed_refs(), 0)) |
|
goto error_return; |
|
|
|
lock->lk = xcalloc(1, sizeof(struct lock_file)); |
|
|
|
lflags = LOCK_DIE_ON_ERROR; |
|
if (flags & REF_NODEREF) { |
|
ref = orig_ref; |
|
lflags |= LOCK_NODEREF; |
|
} |
|
lock->ref_name = xstrdup(ref); |
|
lock->orig_ref_name = xstrdup(orig_ref); |
|
ref_file = git_path("%s", ref); |
|
if (missing) |
|
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, lflags); |
|
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, int delopt) |
|
{ |
|
struct ref_lock *lock; |
|
int err, i = 0, ret = 0, flag = 0; |
|
|
|
lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); |
|
if (!lock) |
|
return 1; |
|
if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { |
|
/* loose */ |
|
const char *path; |
|
|
|
if (!(delopt & REF_NODEREF)) { |
|
i = strlen(lock->lk->filename) - 5; /* .lock */ |
|
lock->lk->filename[i] = 0; |
|
path = lock->lk->filename; |
|
} else { |
|
path = git_path("%s", refname); |
|
} |
|
err = unlink(path); |
|
if (err && errno != ENOENT) { |
|
ret = 1; |
|
error("unlink(%s) failed: %s", |
|
path, strerror(errno)); |
|
} |
|
if (!(delopt & REF_NODEREF)) |
|
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); |
|
const char *symref = NULL; |
|
|
|
if (log && S_ISLNK(loginfo.st_mode)) |
|
return error("reflog for %s is a symlink", oldref); |
|
|
|
symref = resolve_ref(oldref, orig_sha1, 1, &flag); |
|
if (flag & REF_ISSYMREF) |
|
return error("refname %s is a symbolic ref, renaming it is not supported", |
|
oldref); |
|
if (!symref) |
|
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, REF_NODEREF)) { |
|
error("unable to delete old %s", oldref); |
|
goto rollback; |
|
} |
|
|
|
if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) { |
|
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; |
|
} |
|
|
|
int close_ref(struct ref_lock *lock) |
|
{ |
|
if (close_lock_file(lock->lk)) |
|
return -1; |
|
lock->lock_fd = -1; |
|
return 0; |
|
} |
|
|
|
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[PATH_MAX]; |
|
char *logrec; |
|
const char *committer; |
|
|
|
if (log_all_ref_updates < 0) |
|
log_all_ref_updates = !is_bare_repository(); |
|
|
|
git_snpath(log_file, sizeof(log_file), "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 = git_pathdup("%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 (is_null_sha1(sha1)) { |
|
if (get_sha1_hex(logdata + 41, 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; |
|
}
|
|
|