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![Junio C Hamano](/assets/img/avatar_default.png)
Allow a safer "rewind of the remote tip" push than blind "--force", by requiring that the overwritten remote ref to be unchanged since the new history to replace it was prepared. The machinery is more or less ready. The "--force" option is again the big red button to override any safety, thanks to J6t's sanity (the original round allowed --lockref to defeat --force). The logic to choose the default implemented here is fragile (e.g. "git fetch" after seeing a failure will update the remote-tracking branch and will make the next "push" pass, defeating the safety pretty easily). It is suitable only for the simplest workflows, and it may hurt users more than it helps them. * jc/push-cas: push: teach --force-with-lease to smart-http transport send-pack: fix parsing of --force-with-lease option t5540/5541: smart-http does not support "--force-with-lease" t5533: test "push --force-with-lease" push --force-with-lease: tie it all together push --force-with-lease: implement logic to populate old_sha1_expect[] remote.c: add command line option parser for "--force-with-lease" builtin/push.c: use OPT_BOOL, not OPT_BOOLEAN cache.h: move remote/connect API out of it
194 lines
4.5 KiB
C
194 lines
4.5 KiB
C
#include "builtin.h"
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#include "pkt-line.h"
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#include "fetch-pack.h"
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#include "remote.h"
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#include "connect.h"
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static const char fetch_pack_usage[] =
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"git fetch-pack [--all] [--stdin] [--quiet|-q] [--keep|-k] [--thin] "
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"[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
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"[--no-progress] [-v] [<host>:]<directory> [<refs>...]";
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static void add_sought_entry_mem(struct ref ***sought, int *nr, int *alloc,
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const char *name, int namelen)
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{
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struct ref *ref = xcalloc(1, sizeof(*ref) + namelen + 1);
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memcpy(ref->name, name, namelen);
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ref->name[namelen] = '\0';
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(*nr)++;
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ALLOC_GROW(*sought, *nr, *alloc);
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(*sought)[*nr - 1] = ref;
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}
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static void add_sought_entry(struct ref ***sought, int *nr, int *alloc,
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const char *string)
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{
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add_sought_entry_mem(sought, nr, alloc, string, strlen(string));
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}
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int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
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{
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int i, ret;
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struct ref *ref = NULL;
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const char *dest = NULL;
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struct ref **sought = NULL;
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int nr_sought = 0, alloc_sought = 0;
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int fd[2];
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char *pack_lockfile = NULL;
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char **pack_lockfile_ptr = NULL;
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struct child_process *conn;
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struct fetch_pack_args args;
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packet_trace_identity("fetch-pack");
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memset(&args, 0, sizeof(args));
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args.uploadpack = "git-upload-pack";
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for (i = 1; i < argc && *argv[i] == '-'; i++) {
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const char *arg = argv[i];
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if (!prefixcmp(arg, "--upload-pack=")) {
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args.uploadpack = arg + 14;
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continue;
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}
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if (!prefixcmp(arg, "--exec=")) {
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args.uploadpack = arg + 7;
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continue;
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}
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if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
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args.quiet = 1;
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continue;
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}
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if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
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args.lock_pack = args.keep_pack;
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args.keep_pack = 1;
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continue;
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}
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if (!strcmp("--thin", arg)) {
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args.use_thin_pack = 1;
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continue;
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}
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if (!strcmp("--include-tag", arg)) {
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args.include_tag = 1;
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continue;
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}
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if (!strcmp("--all", arg)) {
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args.fetch_all = 1;
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continue;
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}
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if (!strcmp("--stdin", arg)) {
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args.stdin_refs = 1;
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continue;
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}
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if (!strcmp("-v", arg)) {
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args.verbose = 1;
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continue;
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}
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if (!prefixcmp(arg, "--depth=")) {
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args.depth = strtol(arg + 8, NULL, 0);
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continue;
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}
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if (!strcmp("--no-progress", arg)) {
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args.no_progress = 1;
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continue;
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}
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if (!strcmp("--stateless-rpc", arg)) {
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args.stateless_rpc = 1;
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continue;
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}
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if (!strcmp("--lock-pack", arg)) {
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args.lock_pack = 1;
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pack_lockfile_ptr = &pack_lockfile;
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continue;
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}
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if (!strcmp("--check-self-contained-and-connected", arg)) {
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args.check_self_contained_and_connected = 1;
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continue;
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}
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usage(fetch_pack_usage);
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}
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if (i < argc)
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dest = argv[i++];
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else
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usage(fetch_pack_usage);
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/*
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* Copy refs from cmdline to growable list, then append any
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* refs from the standard input:
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*/
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for (; i < argc; i++)
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add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
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if (args.stdin_refs) {
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if (args.stateless_rpc) {
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/* in stateless RPC mode we use pkt-line to read
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* from stdin, until we get a flush packet
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*/
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for (;;) {
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char *line = packet_read_line(0, NULL);
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if (!line)
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break;
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add_sought_entry(&sought, &nr_sought, &alloc_sought, line);
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}
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}
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else {
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/* read from stdin one ref per line, until EOF */
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struct strbuf line = STRBUF_INIT;
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while (strbuf_getline(&line, stdin, '\n') != EOF)
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add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
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strbuf_release(&line);
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}
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}
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if (args.stateless_rpc) {
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conn = NULL;
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fd[0] = 0;
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fd[1] = 1;
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} else {
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conn = git_connect(fd, dest, args.uploadpack,
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args.verbose ? CONNECT_VERBOSE : 0);
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}
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get_remote_heads(fd[0], NULL, 0, &ref, 0, NULL);
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ref = fetch_pack(&args, fd, conn, ref, dest,
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sought, nr_sought, pack_lockfile_ptr);
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if (pack_lockfile) {
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printf("lock %s\n", pack_lockfile);
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fflush(stdout);
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}
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if (args.check_self_contained_and_connected &&
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args.self_contained_and_connected) {
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printf("connectivity-ok\n");
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fflush(stdout);
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}
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close(fd[0]);
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close(fd[1]);
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if (finish_connect(conn))
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return 1;
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ret = !ref;
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/*
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* If the heads to pull were given, we should have consumed
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* all of them by matching the remote. Otherwise, 'git fetch
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* remote no-such-ref' would silently succeed without issuing
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* an error.
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*/
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for (i = 0; i < nr_sought; i++) {
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if (!sought[i] || sought[i]->matched)
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continue;
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error("no such remote ref %s", sought[i]->name);
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ret = 1;
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}
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while (ref) {
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printf("%s %s\n",
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sha1_to_hex(ref->old_sha1), ref->name);
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ref = ref->next;
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}
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return ret;
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}
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