mirror of
https://github.com/git/git.git
synced 2024-11-24 10:26:17 +08:00
57b235a4bc
The current code is very inconsistent about which signals are caught for doing cleanup of temporary files and lock files. Some callsites checked only SIGINT, while others checked a variety of death-dealing signals. This patch factors out those signals to a single function, and then calls it everywhere. For some sites, that means this is a simple clean up. For others, it is an improvement in that they will now properly clean themselves up after a larger variety of signals. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
575 lines
13 KiB
C
575 lines
13 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "refs.h"
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#include "commit.h"
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#include "sigchain.h"
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static char *get_stdin(void)
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{
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struct strbuf buf = STRBUF_INIT;
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if (strbuf_read(&buf, 0, 1024) < 0) {
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die("error reading standard input: %s", strerror(errno));
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}
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return strbuf_detach(&buf, NULL);
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}
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static void show_new(enum object_type type, unsigned char *sha1_new)
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{
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fprintf(stderr, " %s: %s\n", typename(type),
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find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
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}
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static int update_ref_env(const char *action,
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const char *refname,
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unsigned char *sha1,
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unsigned char *oldval)
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{
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char msg[1024];
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const char *rla = getenv("GIT_REFLOG_ACTION");
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if (!rla)
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rla = "(reflog update)";
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if (snprintf(msg, sizeof(msg), "%s: %s", rla, action) >= sizeof(msg))
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warning("reflog message too long: %.*s...", 50, msg);
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return update_ref(msg, refname, sha1, oldval, 0, QUIET_ON_ERR);
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}
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static int update_local_ref(const char *name,
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const char *new_head,
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const char *note,
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int verbose, int force)
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{
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unsigned char sha1_old[20], sha1_new[20];
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char oldh[41], newh[41];
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struct commit *current, *updated;
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enum object_type type;
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if (get_sha1_hex(new_head, sha1_new))
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die("malformed object name %s", new_head);
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type = sha1_object_info(sha1_new, NULL);
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if (type < 0)
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die("object %s not found", new_head);
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if (!*name) {
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/* Not storing */
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if (verbose) {
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fprintf(stderr, "* fetched %s\n", note);
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show_new(type, sha1_new);
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}
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return 0;
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}
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if (get_sha1(name, sha1_old)) {
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const char *msg;
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just_store:
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/* new ref */
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if (!strncmp(name, "refs/tags/", 10))
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msg = "storing tag";
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else
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msg = "storing head";
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fprintf(stderr, "* %s: storing %s\n",
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name, note);
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show_new(type, sha1_new);
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return update_ref_env(msg, name, sha1_new, NULL);
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}
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if (!hashcmp(sha1_old, sha1_new)) {
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if (verbose) {
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fprintf(stderr, "* %s: same as %s\n", name, note);
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show_new(type, sha1_new);
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}
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return 0;
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}
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if (!strncmp(name, "refs/tags/", 10)) {
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fprintf(stderr, "* %s: updating with %s\n", name, note);
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show_new(type, sha1_new);
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return update_ref_env("updating tag", name, sha1_new, NULL);
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}
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current = lookup_commit_reference(sha1_old);
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updated = lookup_commit_reference(sha1_new);
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if (!current || !updated)
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goto just_store;
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strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
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strcpy(newh, find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
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if (in_merge_bases(current, &updated, 1)) {
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fprintf(stderr, "* %s: fast forward to %s\n",
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name, note);
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fprintf(stderr, " old..new: %s..%s\n", oldh, newh);
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return update_ref_env("fast forward", name, sha1_new, sha1_old);
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}
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if (!force) {
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fprintf(stderr,
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"* %s: not updating to non-fast forward %s\n",
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name, note);
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fprintf(stderr,
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" old...new: %s...%s\n", oldh, newh);
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return 1;
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}
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fprintf(stderr,
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"* %s: forcing update to non-fast forward %s\n",
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name, note);
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fprintf(stderr, " old...new: %s...%s\n", oldh, newh);
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return update_ref_env("forced-update", name, sha1_new, sha1_old);
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}
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static int append_fetch_head(FILE *fp,
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const char *head, const char *remote,
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const char *remote_name, const char *remote_nick,
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const char *local_name, int not_for_merge,
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int verbose, int force)
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{
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struct commit *commit;
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int remote_len, i, note_len;
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unsigned char sha1[20];
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char note[1024];
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const char *what, *kind;
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if (get_sha1(head, sha1))
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return error("Not a valid object name: %s", head);
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commit = lookup_commit_reference_gently(sha1, 1);
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if (!commit)
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not_for_merge = 1;
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if (!strcmp(remote_name, "HEAD")) {
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kind = "";
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what = "";
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}
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else if (!strncmp(remote_name, "refs/heads/", 11)) {
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kind = "branch";
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what = remote_name + 11;
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}
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else if (!strncmp(remote_name, "refs/tags/", 10)) {
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kind = "tag";
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what = remote_name + 10;
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}
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else if (!strncmp(remote_name, "refs/remotes/", 13)) {
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kind = "remote branch";
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what = remote_name + 13;
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}
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else {
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kind = "";
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what = remote_name;
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}
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remote_len = strlen(remote);
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for (i = remote_len - 1; remote[i] == '/' && 0 <= i; i--)
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;
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remote_len = i + 1;
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if (4 < i && !strncmp(".git", remote + i - 3, 4))
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remote_len = i - 3;
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note_len = 0;
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if (*what) {
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if (*kind)
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note_len += sprintf(note + note_len, "%s ", kind);
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note_len += sprintf(note + note_len, "'%s' of ", what);
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}
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note_len += sprintf(note + note_len, "%.*s", remote_len, remote);
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fprintf(fp, "%s\t%s\t%s\n",
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sha1_to_hex(commit ? commit->object.sha1 : sha1),
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not_for_merge ? "not-for-merge" : "",
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note);
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return update_local_ref(local_name, head, note, verbose, force);
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}
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static char *keep;
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static void remove_keep(void)
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{
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if (keep && *keep)
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unlink(keep);
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}
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static void remove_keep_on_signal(int signo)
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{
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remove_keep();
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sigchain_pop(signo);
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raise(signo);
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}
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static char *find_local_name(const char *remote_name, const char *refs,
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int *force_p, int *not_for_merge_p)
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{
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const char *ref = refs;
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int len = strlen(remote_name);
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while (ref) {
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const char *next;
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int single_force, not_for_merge;
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while (*ref == '\n')
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ref++;
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if (!*ref)
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break;
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next = strchr(ref, '\n');
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single_force = not_for_merge = 0;
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if (*ref == '+') {
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single_force = 1;
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ref++;
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}
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if (*ref == '.') {
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not_for_merge = 1;
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ref++;
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if (*ref == '+') {
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single_force = 1;
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ref++;
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}
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}
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if (!strncmp(remote_name, ref, len) && ref[len] == ':') {
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const char *local_part = ref + len + 1;
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int retlen;
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if (!next)
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retlen = strlen(local_part);
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else
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retlen = next - local_part;
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*force_p = single_force;
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*not_for_merge_p = not_for_merge;
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return xmemdupz(local_part, retlen);
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}
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ref = next;
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}
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return NULL;
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}
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static int fetch_native_store(FILE *fp,
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const char *remote,
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const char *remote_nick,
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const char *refs,
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int verbose, int force)
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{
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char buffer[1024];
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int err = 0;
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sigchain_push_common(remove_keep_on_signal);
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atexit(remove_keep);
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while (fgets(buffer, sizeof(buffer), stdin)) {
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int len;
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char *cp;
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char *local_name;
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int single_force, not_for_merge;
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for (cp = buffer; *cp && !isspace(*cp); cp++)
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;
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if (*cp)
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*cp++ = 0;
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len = strlen(cp);
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if (len && cp[len-1] == '\n')
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cp[--len] = 0;
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if (!strcmp(buffer, "failed"))
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die("Fetch failure: %s", remote);
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if (!strcmp(buffer, "pack"))
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continue;
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if (!strcmp(buffer, "keep")) {
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char *od = get_object_directory();
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int len = strlen(od) + strlen(cp) + 50;
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keep = xmalloc(len);
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sprintf(keep, "%s/pack/pack-%s.keep", od, cp);
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continue;
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}
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local_name = find_local_name(cp, refs,
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&single_force, ¬_for_merge);
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if (!local_name)
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continue;
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err |= append_fetch_head(fp,
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buffer, remote, cp, remote_nick,
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local_name, not_for_merge,
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verbose, force || single_force);
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}
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return err;
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}
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static int parse_reflist(const char *reflist)
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{
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const char *ref;
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printf("refs='");
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for (ref = reflist; ref; ) {
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const char *next;
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while (*ref && isspace(*ref))
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ref++;
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if (!*ref)
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break;
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for (next = ref; *next && !isspace(*next); next++)
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;
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printf("\n%.*s", (int)(next - ref), ref);
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ref = next;
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}
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printf("'\n");
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printf("rref='");
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for (ref = reflist; ref; ) {
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const char *next, *colon;
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while (*ref && isspace(*ref))
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ref++;
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if (!*ref)
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break;
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for (next = ref; *next && !isspace(*next); next++)
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;
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if (*ref == '.')
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ref++;
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if (*ref == '+')
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ref++;
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colon = strchr(ref, ':');
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putchar('\n');
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printf("%.*s", (int)((colon ? colon : next) - ref), ref);
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ref = next;
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}
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printf("'\n");
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return 0;
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}
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static int expand_refs_wildcard(const char *ls_remote_result, int numrefs,
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const char **refs)
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{
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int i, matchlen, replacelen;
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int found_one = 0;
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const char *remote = *refs++;
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numrefs--;
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if (numrefs == 0) {
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fprintf(stderr, "Nothing specified for fetching with remote.%s.fetch\n",
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remote);
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printf("empty\n");
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}
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for (i = 0; i < numrefs; i++) {
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const char *ref = refs[i];
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const char *lref = ref;
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const char *colon;
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const char *tail;
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const char *ls;
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const char *next;
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if (*lref == '+')
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lref++;
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colon = strchr(lref, ':');
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tail = lref + strlen(lref);
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if (!(colon &&
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2 < colon - lref &&
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colon[-1] == '*' &&
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colon[-2] == '/' &&
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2 < tail - (colon + 1) &&
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tail[-1] == '*' &&
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tail[-2] == '/')) {
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/* not a glob */
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if (!found_one++)
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printf("explicit\n");
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printf("%s\n", ref);
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continue;
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}
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/* glob */
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if (!found_one++)
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printf("glob\n");
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/* lref to colon-2 is remote hierarchy name;
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* colon+1 to tail-2 is local.
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*/
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matchlen = (colon-1) - lref;
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replacelen = (tail-1) - (colon+1);
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for (ls = ls_remote_result; ls; ls = next) {
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const char *eol;
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unsigned char sha1[20];
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int namelen;
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while (*ls && isspace(*ls))
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ls++;
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next = strchr(ls, '\n');
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eol = !next ? (ls + strlen(ls)) : next;
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if (!memcmp("^{}", eol-3, 3))
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continue;
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if (eol - ls < 40)
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continue;
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if (get_sha1_hex(ls, sha1))
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continue;
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ls += 40;
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while (ls < eol && isspace(*ls))
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ls++;
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/* ls to next (or eol) is the name.
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* is it identical to lref to colon-2?
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*/
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if ((eol - ls) <= matchlen ||
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strncmp(ls, lref, matchlen))
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continue;
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/* Yes, it is a match */
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namelen = eol - ls;
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if (lref != ref)
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putchar('+');
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printf("%.*s:%.*s%.*s\n",
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namelen, ls,
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replacelen, colon + 1,
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namelen - matchlen, ls + matchlen);
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}
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}
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return 0;
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}
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static int pick_rref(int sha1_only, const char *rref, const char *ls_remote_result)
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{
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int err = 0;
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int lrr_count = lrr_count, i, pass;
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const char *cp;
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struct lrr {
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const char *line;
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const char *name;
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int namelen;
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int shown;
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} *lrr_list = lrr_list;
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for (pass = 0; pass < 2; pass++) {
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/* pass 0 counts and allocates, pass 1 fills... */
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cp = ls_remote_result;
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i = 0;
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while (1) {
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const char *np;
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while (*cp && isspace(*cp))
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cp++;
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if (!*cp)
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break;
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np = strchrnul(cp, '\n');
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if (pass) {
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lrr_list[i].line = cp;
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lrr_list[i].name = cp + 41;
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lrr_list[i].namelen = np - (cp + 41);
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}
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i++;
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cp = np;
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}
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if (!pass) {
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lrr_count = i;
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lrr_list = xcalloc(lrr_count, sizeof(*lrr_list));
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}
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}
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while (1) {
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const char *next;
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int rreflen;
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int i;
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while (*rref && isspace(*rref))
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rref++;
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if (!*rref)
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break;
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next = strchrnul(rref, '\n');
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rreflen = next - rref;
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for (i = 0; i < lrr_count; i++) {
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struct lrr *lrr = &(lrr_list[i]);
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if (rreflen == lrr->namelen &&
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!memcmp(lrr->name, rref, rreflen)) {
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if (!lrr->shown)
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printf("%.*s\n",
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sha1_only ? 40 : lrr->namelen + 41,
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lrr->line);
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lrr->shown = 1;
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break;
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}
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}
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if (lrr_count <= i) {
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error("pick-rref: %.*s not found", rreflen, rref);
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err = 1;
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}
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rref = next;
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}
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free(lrr_list);
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return err;
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}
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int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
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{
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int verbose = 0;
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int force = 0;
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int sopt = 0;
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while (1 < argc) {
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const char *arg = argv[1];
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if (!strcmp("-v", arg))
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verbose = 1;
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else if (!strcmp("-f", arg))
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force = 1;
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else if (!strcmp("-s", arg))
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sopt = 1;
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else
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break;
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argc--;
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argv++;
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}
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if (argc <= 1)
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return error("Missing subcommand");
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if (!strcmp("append-fetch-head", argv[1])) {
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int result;
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FILE *fp;
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char *filename;
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if (argc != 8)
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return error("append-fetch-head takes 6 args");
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filename = git_path("FETCH_HEAD");
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fp = fopen(filename, "a");
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if (!fp)
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return error("cannot open %s: %s\n", filename, strerror(errno));
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result = append_fetch_head(fp, argv[2], argv[3],
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argv[4], argv[5],
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argv[6], !!argv[7][0],
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verbose, force);
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fclose(fp);
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return result;
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}
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if (!strcmp("native-store", argv[1])) {
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int result;
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FILE *fp;
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char *filename;
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if (argc != 5)
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return error("fetch-native-store takes 3 args");
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filename = git_path("FETCH_HEAD");
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fp = fopen(filename, "a");
|
|
if (!fp)
|
|
return error("cannot open %s: %s\n", filename, strerror(errno));
|
|
result = fetch_native_store(fp, argv[2], argv[3], argv[4],
|
|
verbose, force);
|
|
fclose(fp);
|
|
return result;
|
|
}
|
|
if (!strcmp("parse-reflist", argv[1])) {
|
|
const char *reflist;
|
|
if (argc != 3)
|
|
return error("parse-reflist takes 1 arg");
|
|
reflist = argv[2];
|
|
if (!strcmp(reflist, "-"))
|
|
reflist = get_stdin();
|
|
return parse_reflist(reflist);
|
|
}
|
|
if (!strcmp("pick-rref", argv[1])) {
|
|
const char *ls_remote_result;
|
|
if (argc != 4)
|
|
return error("pick-rref takes 2 args");
|
|
ls_remote_result = argv[3];
|
|
if (!strcmp(ls_remote_result, "-"))
|
|
ls_remote_result = get_stdin();
|
|
return pick_rref(sopt, argv[2], ls_remote_result);
|
|
}
|
|
if (!strcmp("expand-refs-wildcard", argv[1])) {
|
|
const char *reflist;
|
|
if (argc < 4)
|
|
return error("expand-refs-wildcard takes at least 2 args");
|
|
reflist = argv[2];
|
|
if (!strcmp(reflist, "-"))
|
|
reflist = get_stdin();
|
|
return expand_refs_wildcard(reflist, argc - 3, argv + 3);
|
|
}
|
|
|
|
return error("Unknown subcommand: %s", argv[1]);
|
|
}
|