diff options
Diffstat (limited to 'builtin-fetch--tool.c')
| -rw-r--r-- | builtin-fetch--tool.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/builtin-fetch--tool.c b/builtin-fetch--tool.c new file mode 100644 index 000000000..3075ba04a --- /dev/null +++ b/builtin-fetch--tool.c @@ -0,0 +1,214 @@ +#include "cache.h" +#include "refs.h" +#include "commit.h" + +static void show_new(char *type, unsigned char *sha1_new) +{ + fprintf(stderr, " %s: %s\n", type, + find_unique_abbrev(sha1_new, DEFAULT_ABBREV)); +} + +static int update_ref(const char *action, + const char *refname, + unsigned char *sha1, + unsigned char *oldval) +{ + int len; + char msg[1024]; + char *rla = getenv("GIT_REFLOG_ACTION"); + static struct ref_lock *lock; + + if (!rla) + rla = "(reflog update)"; + len = snprintf(msg, sizeof(msg), "%s: %s", rla, action); + if (sizeof(msg) <= len) + die("insanely long action"); + lock = lock_any_ref_for_update(refname, oldval); + if (!lock) + return 1; + if (write_ref_sha1(lock, sha1, msg) < 0) + return 1; + return 0; +} + +static int update_local_ref(const char *name, + const char *new_head, + const char *note, + int verbose, int force) +{ + char type[20]; + unsigned char sha1_old[20], sha1_new[20]; + char oldh[41], newh[41]; + struct commit *current, *updated; + + if (get_sha1_hex(new_head, sha1_new)) + die("malformed object name %s", new_head); + if (sha1_object_info(sha1_new, type, NULL)) + die("object %s not found", new_head); + + if (!*name) { + /* Not storing */ + if (verbose) { + fprintf(stderr, "* fetched %s\n", note); + show_new(type, sha1_new); + } + return 0; + } + + if (get_sha1(name, sha1_old)) { + char *msg; + just_store: + /* new ref */ + if (!strncmp(name, "refs/tags/", 10)) + msg = "storing tag"; + else + msg = "storing head"; + fprintf(stderr, "* %s: storing %s\n", + name, note); + show_new(type, sha1_new); + return update_ref(msg, name, sha1_new, NULL); + } + + if (!hashcmp(sha1_old, sha1_new)) { + if (verbose) { + fprintf(stderr, "* %s: same as %s\n", name, note); + show_new(type, sha1_new); + } + return 0; + } + + if (!strncmp(name, "refs/tags/", 10)) { + fprintf(stderr, "* %s: updating with %s\n", name, note); + show_new(type, sha1_new); + return update_ref("updating tag", name, sha1_new, NULL); + } + + current = lookup_commit_reference(sha1_old); + updated = lookup_commit_reference(sha1_new); + if (!current || !updated) + goto just_store; + + strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV)); + strcpy(newh, find_unique_abbrev(sha1_new, DEFAULT_ABBREV)); + + if (in_merge_bases(current, &updated, 1)) { + fprintf(stderr, "* %s: fast forward to %s\n", + name, note); + fprintf(stderr, " old..new: %s..%s\n", oldh, newh); + return update_ref("fast forward", name, sha1_new, sha1_old); + } + if (!force) { + fprintf(stderr, + "* %s: not updating to non-fast forward %s\n", + name, note); + fprintf(stderr, + " old...new: %s...%s\n", oldh, newh); + return 1; + } + fprintf(stderr, + "* %s: forcing update to non-fast forward %s\n", + name, note); + fprintf(stderr, " old...new: %s...%s\n", oldh, newh); + return update_ref("forced-update", name, sha1_new, sha1_old); +} + +static int append_fetch_head(FILE *fp, + const char *head, const char *remote, + const char *remote_name, const char *remote_nick, + const char *local_name, int not_for_merge, + int verbose, int force) +{ + struct commit *commit; + int remote_len, i, note_len; + unsigned char sha1[20]; + char note[1024]; + const char *what, *kind; + + if (get_sha1(head, sha1)) + return error("Not a valid object name: %s", head); + commit = lookup_commit_reference(sha1); + if (!commit) + not_for_merge = 1; + + if (!strcmp(remote_name, "HEAD")) { + kind = ""; + what = ""; + } + else if (!strncmp(remote_name, "refs/heads/", 11)) { + kind = "branch"; + what = remote_name + 11; + } + else if (!strncmp(remote_name, "refs/tags/", 10)) { + kind = "tag"; + what = remote_name + 10; + } + else if (!strncmp(remote_name, "refs/remotes/", 13)) { + kind = "remote branch"; + what = remote_name + 13; + } + else { + kind = ""; + what = remote_name; + } + + remote_len = strlen(remote); + for (i = remote_len - 1; remote[i] == '/' && 0 <= i; i--) + ; + remote_len = i + 1; + if (4 < i && !strncmp(".git", remote + i - 3, 4)) + remote_len = i - 3; + note_len = sprintf(note, "%s\t%s\t", + sha1_to_hex(commit ? commit->object.sha1 : sha1), + not_for_merge ? "not-for-merge" : ""); + if (*what) { + if (*kind) + note_len += sprintf(note + note_len, "%s ", kind); + note_len += sprintf(note + note_len, "'%s' of ", what); + } + note_len += sprintf(note + note_len, "%.*s", remote_len, remote); + fprintf(fp, "%s\n", note); + return update_local_ref(local_name, head, note, verbose, force); +} + +int cmd_fetch__tool(int argc, const char **argv, const char *prefix) +{ + int verbose = 0; + int force = 0; + + while (1 < argc) { + const char *arg = argv[1]; + if (!strcmp("-v", arg)) + verbose = 1; + else if (!strcmp("-f", arg)) + force = 1; + else + break; + argc--; + argv++; + } + + if (argc <= 1) + return error("Missing subcommand"); + + if (!strcmp("append-fetch-head", argv[1])) { + int result; + FILE *fp; + + if (argc != 8) + return error("append-fetch-head takes 6 args"); + fp = fopen(git_path("FETCH_HEAD"), "a"); + result = append_fetch_head(fp, argv[2], argv[3], + argv[4], argv[5], + argv[6], !!argv[7][0], + verbose, force); + fclose(fp); + return result; + } + if (!strcmp("update-local-ref", argv[1])) { + if (argc != 5) + return error("update-local-ref takes 3 args"); + return update_local_ref(argv[2], argv[3], argv[4], + verbose, force); + } + return error("Unknown subcommand: %s", argv[1]); +} |