mirror of
https://github.com/git/git.git
synced 2024-12-14 04:18:16 +08:00
c9a42c4a12
With options such as "--all --since=2.weeks.ago", annotated tags used to be included, when they should have been excluded. The reason is that we heavily abuse the revision walker to determine what needs to be included or excluded. And the revision walker does not show tags at all (and therefore never marks tags as uninteresting). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
403 lines
10 KiB
C
403 lines
10 KiB
C
#include "cache.h"
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#include "bundle.h"
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#include "object.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "list-objects.h"
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#include "run-command.h"
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#include "refs.h"
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static const char bundle_signature[] = "# v2 git bundle\n";
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static void add_to_ref_list(const unsigned char *sha1, const char *name,
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struct ref_list *list)
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{
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if (list->nr + 1 >= list->alloc) {
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list->alloc = alloc_nr(list->nr + 1);
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list->list = xrealloc(list->list,
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list->alloc * sizeof(list->list[0]));
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}
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memcpy(list->list[list->nr].sha1, sha1, 20);
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list->list[list->nr].name = xstrdup(name);
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list->nr++;
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}
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/* returns an fd */
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int read_bundle_header(const char *path, struct bundle_header *header)
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{
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char buffer[1024];
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int fd;
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long fpos;
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FILE *ffd = fopen(path, "rb");
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if (!ffd)
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return error("could not open '%s'", path);
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if (!fgets(buffer, sizeof(buffer), ffd) ||
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strcmp(buffer, bundle_signature)) {
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fclose(ffd);
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return error("'%s' does not look like a v2 bundle file", path);
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}
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while (fgets(buffer, sizeof(buffer), ffd)
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&& buffer[0] != '\n') {
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int is_prereq = buffer[0] == '-';
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int offset = is_prereq ? 1 : 0;
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int len = strlen(buffer);
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unsigned char sha1[20];
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struct ref_list *list = is_prereq ? &header->prerequisites
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: &header->references;
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char delim;
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if (len && buffer[len - 1] == '\n')
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buffer[len - 1] = '\0';
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if (get_sha1_hex(buffer + offset, sha1)) {
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warning("unrecognized header: %s", buffer);
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continue;
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}
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delim = buffer[40 + offset];
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if (!isspace(delim) && (delim != '\0' || !is_prereq))
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die ("invalid header: %s", buffer);
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add_to_ref_list(sha1, isspace(delim) ?
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buffer + 41 + offset : "", list);
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}
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fpos = ftell(ffd);
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fclose(ffd);
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return error("could not open '%s'", path);
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lseek(fd, fpos, SEEK_SET);
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return fd;
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}
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static int list_refs(struct ref_list *r, int argc, const char **argv)
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{
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int i;
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for (i = 0; i < r->nr; i++) {
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if (argc > 1) {
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int j;
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for (j = 1; j < argc; j++)
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if (!strcmp(r->list[i].name, argv[j]))
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break;
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if (j == argc)
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continue;
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}
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printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
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r->list[i].name);
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}
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return 0;
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}
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#define PREREQ_MARK (1u<<16)
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int verify_bundle(struct bundle_header *header, int verbose)
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{
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/*
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* Do fast check, then if any prereqs are missing then go line by line
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* to be verbose about the errors
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*/
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struct ref_list *p = &header->prerequisites;
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struct rev_info revs;
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const char *argv[] = {NULL, "--all"};
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struct object_array refs;
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struct commit *commit;
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int i, ret = 0, req_nr;
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const char *message = "Repository lacks these prerequisite commits:";
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init_revisions(&revs, NULL);
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for (i = 0; i < p->nr; i++) {
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struct ref_list_entry *e = p->list + i;
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struct object *o = parse_object(e->sha1);
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if (o) {
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o->flags |= PREREQ_MARK;
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add_pending_object(&revs, o, e->name);
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continue;
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}
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if (++ret == 1)
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error("%s", message);
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error("%s %s", sha1_to_hex(e->sha1), e->name);
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}
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if (revs.pending.nr != p->nr)
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return ret;
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req_nr = revs.pending.nr;
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setup_revisions(2, argv, &revs, NULL);
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memset(&refs, 0, sizeof(struct object_array));
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for (i = 0; i < revs.pending.nr; i++) {
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struct object_array_entry *e = revs.pending.objects + i;
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add_object_array(e->item, e->name, &refs);
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}
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if (prepare_revision_walk(&revs))
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die("revision walk setup failed");
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i = req_nr;
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while (i && (commit = get_revision(&revs)))
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if (commit->object.flags & PREREQ_MARK)
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i--;
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for (i = 0; i < req_nr; i++)
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if (!(refs.objects[i].item->flags & SHOWN)) {
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if (++ret == 1)
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error("%s", message);
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error("%s %s", sha1_to_hex(refs.objects[i].item->sha1),
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refs.objects[i].name);
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}
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for (i = 0; i < refs.nr; i++)
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clear_commit_marks((struct commit *)refs.objects[i].item, -1);
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if (verbose) {
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struct ref_list *r;
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r = &header->references;
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printf("The bundle contains %d ref%s\n",
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r->nr, (1 < r->nr) ? "s" : "");
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list_refs(r, 0, NULL);
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r = &header->prerequisites;
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printf("The bundle requires these %d ref%s\n",
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r->nr, (1 < r->nr) ? "s" : "");
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list_refs(r, 0, NULL);
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}
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return ret;
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}
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int list_bundle_refs(struct bundle_header *header, int argc, const char **argv)
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{
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return list_refs(&header->references, argc, argv);
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}
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static int is_tag_in_date_range(struct object *tag, struct rev_info *revs)
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{
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unsigned long size;
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enum object_type type;
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char *buf, *line, *lineend;
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unsigned long date;
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if (revs->max_age == -1 && revs->min_age == -1)
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return 1;
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buf = read_sha1_file(tag->sha1, &type, &size);
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if (!buf)
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return 1;
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line = memmem(buf, size, "\ntagger ", 8);
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if (!line++)
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return 1;
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lineend = memchr(line, buf + size - line, '\n');
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line = memchr(line, lineend ? lineend - line : buf + size - line, '>');
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if (!line++)
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return 1;
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date = strtoul(line, NULL, 10);
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free(buf);
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return (revs->max_age == -1 || revs->max_age < date) &&
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(revs->min_age == -1 || revs->min_age > date);
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}
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int create_bundle(struct bundle_header *header, const char *path,
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int argc, const char **argv)
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{
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static struct lock_file lock;
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int bundle_fd = -1;
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int bundle_to_stdout;
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const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *));
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const char **argv_pack = xmalloc(5 * sizeof(const char *));
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int i, ref_count = 0;
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char buffer[1024];
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struct rev_info revs;
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int read_from_stdin = 0;
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struct child_process rls;
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FILE *rls_fout;
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bundle_to_stdout = !strcmp(path, "-");
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if (bundle_to_stdout)
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bundle_fd = 1;
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else
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bundle_fd = hold_lock_file_for_update(&lock, path,
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LOCK_DIE_ON_ERROR);
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/* write signature */
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write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
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/* init revs to list objects for pack-objects later */
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save_commit_buffer = 0;
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init_revisions(&revs, NULL);
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/* write prerequisites */
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memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
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argv_boundary[0] = "rev-list";
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argv_boundary[1] = "--boundary";
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argv_boundary[2] = "--pretty=oneline";
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argv_boundary[argc + 2] = NULL;
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memset(&rls, 0, sizeof(rls));
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rls.argv = argv_boundary;
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rls.out = -1;
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rls.git_cmd = 1;
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if (start_command(&rls))
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return -1;
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rls_fout = fdopen(rls.out, "r");
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while (fgets(buffer, sizeof(buffer), rls_fout)) {
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unsigned char sha1[20];
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if (buffer[0] == '-') {
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write_or_die(bundle_fd, buffer, strlen(buffer));
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if (!get_sha1_hex(buffer + 1, sha1)) {
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struct object *object = parse_object(sha1);
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object->flags |= UNINTERESTING;
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add_pending_object(&revs, object, buffer);
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}
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} else if (!get_sha1_hex(buffer, sha1)) {
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struct object *object = parse_object(sha1);
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object->flags |= SHOWN;
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}
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}
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fclose(rls_fout);
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if (finish_command(&rls))
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return error("rev-list died");
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/* write references */
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argc = setup_revisions(argc, argv, &revs, NULL);
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for (i = 1; i < argc; i++) {
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if (!strcmp(argv[i], "--stdin")) {
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if (read_from_stdin++)
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die("--stdin given twice?");
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read_revisions_from_stdin(&revs);
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continue;
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}
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return error("unrecognized argument: %s'", argv[i]);
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}
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for (i = 0; i < revs.pending.nr; i++) {
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struct object_array_entry *e = revs.pending.objects + i;
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unsigned char sha1[20];
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char *ref;
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const char *display_ref;
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int flag;
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if (e->item->flags & UNINTERESTING)
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continue;
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if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
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continue;
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if (!resolve_ref(e->name, sha1, 1, &flag))
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flag = 0;
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display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
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if (e->item->type == OBJ_TAG &&
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!is_tag_in_date_range(e->item, &revs)) {
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e->item->flags |= UNINTERESTING;
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continue;
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}
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/*
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* Make sure the refs we wrote out is correct; --max-count and
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* other limiting options could have prevented all the tips
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* from getting output.
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*
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* Non commit objects such as tags and blobs do not have
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* this issue as they are not affected by those extra
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* constraints.
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*/
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if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
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warning("ref '%s' is excluded by the rev-list options",
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e->name);
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free(ref);
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continue;
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}
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/*
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* If you run "git bundle create bndl v1.0..v2.0", the
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* name of the positive ref is "v2.0" but that is the
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* commit that is referenced by the tag, and not the tag
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* itself.
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*/
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if (hashcmp(sha1, e->item->sha1)) {
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/*
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* Is this the positive end of a range expressed
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* in terms of a tag (e.g. v2.0 from the range
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* "v1.0..v2.0")?
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*/
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struct commit *one = lookup_commit_reference(sha1);
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struct object *obj;
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if (e->item == &(one->object)) {
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/*
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* Need to include e->name as an
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* independent ref to the pack-objects
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* input, so that the tag is included
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* in the output; otherwise we would
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* end up triggering "empty bundle"
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* error.
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*/
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obj = parse_object(sha1);
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obj->flags |= SHOWN;
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add_pending_object(&revs, obj, e->name);
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}
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free(ref);
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continue;
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}
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ref_count++;
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write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
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write_or_die(bundle_fd, " ", 1);
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write_or_die(bundle_fd, display_ref, strlen(display_ref));
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write_or_die(bundle_fd, "\n", 1);
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free(ref);
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}
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if (!ref_count)
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die ("Refusing to create empty bundle.");
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/* end header */
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write_or_die(bundle_fd, "\n", 1);
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/* write pack */
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argv_pack[0] = "pack-objects";
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argv_pack[1] = "--all-progress";
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argv_pack[2] = "--stdout";
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argv_pack[3] = "--thin";
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argv_pack[4] = NULL;
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memset(&rls, 0, sizeof(rls));
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rls.argv = argv_pack;
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rls.in = -1;
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rls.out = bundle_fd;
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rls.git_cmd = 1;
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if (start_command(&rls))
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return error("Could not spawn pack-objects");
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/*
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* start_command closed bundle_fd if it was > 1
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* so set the lock fd to -1 so commit_lock_file()
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* won't fail trying to close it.
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*/
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lock.fd = -1;
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for (i = 0; i < revs.pending.nr; i++) {
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struct object *object = revs.pending.objects[i].item;
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if (object->flags & UNINTERESTING)
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write_or_die(rls.in, "^", 1);
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write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
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write_or_die(rls.in, "\n", 1);
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}
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close(rls.in);
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if (finish_command(&rls))
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return error ("pack-objects died");
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if (!bundle_to_stdout)
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commit_lock_file(&lock);
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return 0;
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}
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int unbundle(struct bundle_header *header, int bundle_fd)
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{
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const char *argv_index_pack[] = {"index-pack",
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"--fix-thin", "--stdin", NULL};
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struct child_process ip;
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if (verify_bundle(header, 0))
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return -1;
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memset(&ip, 0, sizeof(ip));
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ip.argv = argv_index_pack;
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ip.in = bundle_fd;
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ip.no_stdout = 1;
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ip.git_cmd = 1;
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if (run_command(&ip))
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return error("index-pack died");
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return 0;
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}
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