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git/builtin-push.c
Brian Ewins 11f2441f05 Add a --dry-run option to git-push.
The default behaviour of git-push is potentially confusing
for new users, since it will push changes that are not on
the current branch. Publishing patches that were still
cooking on a development branch is hard to undo.

It would also be nice to be able to verify the expansion
of refspecs if you've edited them, so that you know
what branches matched on the server.

Adding a --dry-run flag allows the user to experiment
safely and learn how to use git-push properly. Originally
suggested by Steffen Prohaska.

Signed-off-by: Brian Ewins <brian.ewins@gmail.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-10-15 22:02:52 -04:00

187 lines
4 KiB
C

/*
* "git push"
*/
#include "cache.h"
#include "refs.h"
#include "run-command.h"
#include "builtin.h"
#include "remote.h"
static const char push_usage[] = "git-push [--all] [--dry-run] [--tags] [--receive-pack=<git-receive-pack>] [--repo=all] [-f | --force] [-v] [<repository> <refspec>...]";
static int all, dry_run, force, thin, verbose;
static const char *receivepack;
static const char **refspec;
static int refspec_nr;
static void add_refspec(const char *ref)
{
int nr = refspec_nr + 1;
refspec = xrealloc(refspec, nr * sizeof(char *));
refspec[nr-1] = ref;
refspec_nr = nr;
}
static void set_refspecs(const char **refs, int nr)
{
int i;
for (i = 0; i < nr; i++) {
const char *ref = refs[i];
if (!strcmp("tag", ref)) {
char *tag;
int len;
if (nr <= ++i)
die("tag shorthand without <tag>");
len = strlen(refs[i]) + 11;
tag = xmalloc(len);
strcpy(tag, "refs/tags/");
strcat(tag, refs[i]);
ref = tag;
}
add_refspec(ref);
}
}
static int do_push(const char *repo)
{
int i, errs;
int common_argc;
const char **argv;
int argc;
struct remote *remote = remote_get(repo);
if (!remote)
die("bad repository '%s'", repo);
if (remote->receivepack) {
char *rp = xmalloc(strlen(remote->receivepack) + 16);
sprintf(rp, "--receive-pack=%s", remote->receivepack);
receivepack = rp;
}
if (!refspec && !all && remote->push_refspec_nr) {
refspec = remote->push_refspec;
refspec_nr = remote->push_refspec_nr;
}
argv = xmalloc((refspec_nr + 10) * sizeof(char *));
argv[0] = "dummy-send-pack";
argc = 1;
if (all)
argv[argc++] = "--all";
if (dry_run)
argv[argc++] = "--dry-run";
if (force)
argv[argc++] = "--force";
if (receivepack)
argv[argc++] = receivepack;
common_argc = argc;
errs = 0;
for (i = 0; i < remote->uri_nr; i++) {
int err;
int dest_argc = common_argc;
int dest_refspec_nr = refspec_nr;
const char **dest_refspec = refspec;
const char *dest = remote->uri[i];
const char *sender = "send-pack";
if (!prefixcmp(dest, "http://") ||
!prefixcmp(dest, "https://"))
sender = "http-push";
else {
char *rem = xmalloc(strlen(remote->name) + 10);
sprintf(rem, "--remote=%s", remote->name);
argv[dest_argc++] = rem;
if (thin)
argv[dest_argc++] = "--thin";
}
argv[0] = sender;
argv[dest_argc++] = dest;
while (dest_refspec_nr--)
argv[dest_argc++] = *dest_refspec++;
argv[dest_argc] = NULL;
if (verbose)
fprintf(stderr, "Pushing to %s\n", dest);
err = run_command_v_opt(argv, RUN_GIT_CMD);
if (!err)
continue;
error("failed to push to '%s'", remote->uri[i]);
switch (err) {
case -ERR_RUN_COMMAND_FORK:
error("unable to fork for %s", sender);
case -ERR_RUN_COMMAND_EXEC:
error("unable to exec %s", sender);
break;
case -ERR_RUN_COMMAND_WAITPID:
case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
error("%s died with strange error", sender);
}
errs++;
}
return !!errs;
}
int cmd_push(int argc, const char **argv, const char *prefix)
{
int i;
const char *repo = NULL; /* default repository */
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (arg[0] != '-') {
repo = arg;
i++;
break;
}
if (!strcmp(arg, "-v")) {
verbose=1;
continue;
}
if (!prefixcmp(arg, "--repo=")) {
repo = arg+7;
continue;
}
if (!strcmp(arg, "--all")) {
all = 1;
continue;
}
if (!strcmp(arg, "--dry-run")) {
dry_run = 1;
continue;
}
if (!strcmp(arg, "--tags")) {
add_refspec("refs/tags/*");
continue;
}
if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
force = 1;
continue;
}
if (!strcmp(arg, "--thin")) {
thin = 1;
continue;
}
if (!strcmp(arg, "--no-thin")) {
thin = 0;
continue;
}
if (!prefixcmp(arg, "--receive-pack=")) {
receivepack = arg;
continue;
}
if (!prefixcmp(arg, "--exec=")) {
receivepack = arg;
continue;
}
usage(push_usage);
}
set_refspecs(argv + i, argc - i);
if (all && refspec)
usage(push_usage);
return do_push(repo);
}