1 files changed, 116 insertions, 38 deletions

diff --git a/builtin/push.c b/builtin/push.c
index db9ba30..7b1b66c 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -15,12 +15,14 @@ static const char * const push_usage[] = {
 	NULL,
 };
 
-static int thin;
+static int thin = 1;
 static int deleterefs;
 static const char *receivepack;
 static int verbosity;
 static int progress = -1;
 
+static struct push_cas_option cas;
+
 static const char **refspec;
 static int refspec_nr;
 static int refspec_alloc;
@@ -92,7 +94,7 @@ static NORETURN int die_push_simple(struct branch *branch, struct remote *remote
 	if (!short_upstream)
 		short_upstream = branch->merge[0]->src;
 	/*
-	 * Don't show advice for people who explicitely set
+	 * Don't show advice for people who explicitly set
 	 * push.default.
 	 */
 	if (push_default == PUSH_DEFAULT_UNSPECIFIED)
@@ -113,17 +115,20 @@ static NORETURN int die_push_simple(struct branch *branch, struct remote *remote
 	    remote->name, branch->name, advice_maybe);
 }
 
-static void setup_push_upstream(struct remote *remote, int simple)
+static const char message_detached_head_die[] =
+	N_("You are not currently on a branch.\n"
+	   "To push the history leading to the current (detached HEAD)\n"
+	   "state now, use\n"
+	   "\n"
+	   "    git push %s HEAD:<name-of-remote-branch>\n");
+
+static void setup_push_upstream(struct remote *remote, struct branch *branch,
+				int triangular)
 {
 	struct strbuf refspec = STRBUF_INIT;
-	struct branch *branch = branch_get(NULL);
+
 	if (!branch)
-		die(_("You are not currently on a branch.\n"
-		    "To push the history leading to the current (detached HEAD)\n"
-		    "state now, use\n"
-		    "\n"
-		    "    git push %s HEAD:<name-of-remote-branch>\n"),
-		    remote->name);
+		die(_(message_detached_head_die), remote->name);
 	if (!branch->merge_nr || !branch->merge || !branch->remote_name)
 		die(_("The current branch %s has no upstream branch.\n"
 		    "To push the current branch and set the remote as upstream, use\n"
@@ -135,18 +140,29 @@ static void setup_push_upstream(struct remote *remote, int simple)
 	if (branch->merge_nr != 1)
 		die(_("The current branch %s has multiple upstream branches, "
 		    "refusing to push."), branch->name);
-	if (strcmp(branch->remote_name, remote->name))
+	if (triangular)
 		die(_("You are pushing to remote '%s', which is not the upstream of\n"
 		      "your current branch '%s', without telling me what to push\n"
 		      "to update which remote branch."),
 		    remote->name, branch->name);
-	if (simple && strcmp(branch->refname, branch->merge[0]->src))
-		die_push_simple(branch, remote);
+
+	if (push_default == PUSH_DEFAULT_SIMPLE) {
+		/* Additional safety */
+		if (strcmp(branch->refname, branch->merge[0]->src))
+			die_push_simple(branch, remote);
+	}
 
 	strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 	add_refspec(refspec.buf);
 }
 
+static void setup_push_current(struct remote *remote, struct branch *branch)
+{
+	if (!branch)
+		die(_(message_detached_head_die), remote->name);
+	add_refspec(branch->name);
+}
+
 static char warn_unspecified_push_default_msg[] =
 N_("push.default is unset; its implicit value is changing in\n"
    "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
@@ -171,8 +187,17 @@ static void warn_unspecified_push_default_configuration(void)
 	warning("%s\n", _(warn_unspecified_push_default_msg));
 }
 
+static int is_workflow_triangular(struct remote *remote)
+{
+	struct remote *fetch_remote = remote_get(NULL);
+	return (fetch_remote && fetch_remote != remote);
+}
+
 static void setup_default_push_refspecs(struct remote *remote)
 {
+	struct branch *branch = branch_get(NULL);
+	int triangular = is_workflow_triangular(remote);
+
 	switch (push_default) {
 	default:
 	case PUSH_DEFAULT_UNSPECIFIED:
@@ -184,15 +209,18 @@ static void setup_default_push_refspecs(struct remote *remote)
 		break;
 
 	case PUSH_DEFAULT_SIMPLE:
-		setup_push_upstream(remote, 1);
+		if (triangular)
+			setup_push_current(remote, branch);
+		else
+			setup_push_upstream(remote, branch, triangular);
 		break;
 
 	case PUSH_DEFAULT_UPSTREAM:
-		setup_push_upstream(remote, 0);
+		setup_push_upstream(remote, branch, triangular);
 		break;
 
 	case PUSH_DEFAULT_CURRENT:
-		add_refspec("HEAD");
+		setup_push_current(remote, branch);
 		break;
 
 	case PUSH_DEFAULT_NOTHING:
@@ -204,8 +232,8 @@ static void setup_default_push_refspecs(struct remote *remote)
 
 static const char message_advice_pull_before_push[] =
 	N_("Updates were rejected because the tip of your current branch is behind\n"
-	   "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
-	   "before pushing again.\n"
+	   "its remote counterpart. Integrate the remote changes (e.g.\n"
+	   "'git pull ...') before pushing again.\n"
 	   "See the 'Note about fast-forwards' in 'git push --help' for details.");
 
 static const char message_advice_use_upstream[] =
@@ -216,48 +244,90 @@ static const char message_advice_use_upstream[] =
 
 static const char message_advice_checkout_pull_push[] =
 	N_("Updates were rejected because a pushed branch tip is behind its remote\n"
-	   "counterpart. Check out this branch and merge the remote changes\n"
-	   "(e.g. 'git pull') before pushing again.\n"
+	   "counterpart. Check out this branch and integrate the remote changes\n"
+	   "(e.g. 'git pull ...') before pushing again.\n"
 	   "See the 'Note about fast-forwards' in 'git push --help' for details.");
 
+static const char message_advice_ref_fetch_first[] =
+	N_("Updates were rejected because the remote contains work that you do\n"
+	   "not have locally. This is usually caused by another repository pushing\n"
+	   "to the same ref. You may want to first integrate the remote changes\n"
+	   "(e.g., 'git pull ...') before pushing again.\n"
+	   "See the 'Note about fast-forwards' in 'git push --help' for details.");
+
+static const char message_advice_ref_already_exists[] =
+	N_("Updates were rejected because the tag already exists in the remote.");
+
+static const char message_advice_ref_needs_force[] =
+	N_("You cannot update a remote ref that points at a non-commit object,\n"
+	   "or update a remote ref to make it point at a non-commit object,\n"
+	   "without using the '--force' option.\n");
+
 static void advise_pull_before_push(void)
 {
-	if (!advice_push_non_ff_current || !advice_push_nonfastforward)
+	if (!advice_push_non_ff_current || !advice_push_update_rejected)
 		return;
 	advise(_(message_advice_pull_before_push));
 }
 
 static void advise_use_upstream(void)
 {
-	if (!advice_push_non_ff_default || !advice_push_nonfastforward)
+	if (!advice_push_non_ff_default || !advice_push_update_rejected)
 		return;
 	advise(_(message_advice_use_upstream));
 }
 
 static void advise_checkout_pull_push(void)
 {
-	if (!advice_push_non_ff_matching || !advice_push_nonfastforward)
+	if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 		return;
 	advise(_(message_advice_checkout_pull_push));
 }
 
+static void advise_ref_already_exists(void)
+{
+	if (!advice_push_already_exists || !advice_push_update_rejected)
+		return;
+	advise(_(message_advice_ref_already_exists));
+}
+
+static void advise_ref_fetch_first(void)
+{
+	if (!advice_push_fetch_first || !advice_push_update_rejected)
+		return;
+	advise(_(message_advice_ref_fetch_first));
+}
+
+static void advise_ref_needs_force(void)
+{
+	if (!advice_push_needs_force || !advice_push_update_rejected)
+		return;
+	advise(_(message_advice_ref_needs_force));
+}
+
 static int push_with_options(struct transport *transport, int flags)
 {
 	int err;
-	int nonfastforward;
+	unsigned int reject_reasons;
 
 	transport_set_verbosity(transport, verbosity, progress);
 
 	if (receivepack)
 		transport_set_option(transport,
 				     TRANS_OPT_RECEIVEPACK, receivepack);
-	if (thin)
-		transport_set_option(transport, TRANS_OPT_THIN, "yes");
+	transport_set_option(transport, TRANS_OPT_THIN, thin ? "yes" : NULL);
+
+	if (!is_empty_cas(&cas)) {
+		if (!transport->smart_options)
+			die("underlying transport does not support --%s option",
+			    CAS_OPT_NAME);
+		transport->smart_options->cas = &cas;
+	}
 
 	if (verbosity > 0)
 		fprintf(stderr, _("Pushing to %s\n"), transport->url);
 	err = transport_push(transport, refspec_nr, refspec, flags,
-			     &nonfastforward);
+			     &reject_reasons);
 	if (err != 0)
 		error(_("failed to push some refs to '%s'"), transport->url);
 
@@ -265,18 +335,19 @@ static int push_with_options(struct transport *transport, int flags)
 	if (!err)
 		return 0;
 
-	switch (nonfastforward) {
-	default:
-		break;
-	case NON_FF_HEAD:
+	if (reject_reasons & REJECT_NON_FF_HEAD) {
 		advise_pull_before_push();
-		break;
-	case NON_FF_OTHER:
+	} else if (reject_reasons & REJECT_NON_FF_OTHER) {
 		if (default_matching_used)
 			advise_use_upstream();
 		else
 			advise_checkout_pull_push();
-		break;
+	} else if (reject_reasons & REJECT_ALREADY_EXISTS) {
+		advise_ref_already_exists();
+	} else if (reject_reasons & REJECT_FETCH_FIRST) {
+		advise_ref_fetch_first();
+	} else if (reject_reasons & REJECT_NEEDS_FORCE) {
+		advise_ref_needs_force();
 	}
 
 	return 1;
@@ -285,7 +356,7 @@ static int push_with_options(struct transport *transport, int flags)
 static int do_push(const char *repo, int flags)
 {
 	int i, errs;
-	struct remote *remote = remote_get(repo);
+	struct remote *remote = pushremote_get(repo);
 	const char **url;
 	int url_nr;
 
@@ -383,15 +454,19 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 		OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 			    (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
-		OPT_BOOLEAN( 0, "delete", &deleterefs, N_("delete refs")),
-		OPT_BOOLEAN( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
+		OPT_BOOL( 0, "delete", &deleterefs, N_("delete refs")),
+		OPT_BOOL( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 		OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 		OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 		OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
+		{ OPTION_CALLBACK,
+		  0, CAS_OPT_NAME, &cas, N_("refname>:<expect"),
+		  N_("require old value of ref to be at this value"),
+		  PARSE_OPT_OPTARG, parseopt_push_cas_option },
 		{ OPTION_CALLBACK, 0, "recurse-submodules", &flags, N_("check"),
 			N_("control recursive pushing of submodules"),
 			PARSE_OPT_OPTARG, option_parse_recurse_submodules },
-		OPT_BOOLEAN( 0 , "thin", &thin, N_("use thin pack")),
+		OPT_BOOL( 0 , "thin", &thin, N_("use thin pack")),
 		OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 		OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 		OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
@@ -399,6 +474,9 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 		OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 			TRANSPORT_PUSH_PRUNE),
+		OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
+		OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
+			TRANSPORT_PUSH_FOLLOW_TAGS),
 		OPT_END()
 	};