push: switch default from "matching" to "simple"

We promised to change the behaviour of lazy "git push [there]" that
does not say what to push on the command line from "matching" to
"simple" in Git 2.0.

This finally flips that bit.

Helped-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -142,19 +142,13 @@ advice.*::
 --
 	pushUpdateRejected::
 		Set this variable to 'false' if you want to disable
-		'pushNonFFCurrent', 'pushNonFFDefault',
+		'pushNonFFCurrent',
 		'pushNonFFMatching', 'pushAlreadyExists',
 		'pushFetchFirst', and 'pushNeedsForce'
 		simultaneously.
 	pushNonFFCurrent::
 		Advice shown when linkgit:git-push[1] fails due to a
 		non-fast-forward update to the current branch.
-	pushNonFFDefault::
-		Advice to set 'push.default' to 'upstream' or 'current'
-		when you ran linkgit:git-push[1] and pushed 'matching
-		refs' by default (i.e. you did not provide an explicit
-		refspec, and no 'push.default' configuration was set)
-		and it resulted in a non-fast-forward error.
 	pushNonFFMatching::
 		Advice shown when you ran linkgit:git-push[1] and pushed
 		'matching refs' explicitly (i.e. you used ':', or
@@ -1929,7 +1923,7 @@ When pushing to a remote that is different from the remote you normally
 pull from, work as `current`.  This is the safest option and is suited
 for beginners.
 +
-This mode will become the default in Git 2.0.
+This mode has become the default in Git 2.0.
 
 * `matching` - push all branches having the same name on both ends.
   This makes the repository you are pushing to remember the set of
@@ -1948,8 +1942,8 @@ suitable for pushing into a shared central repository, as other
 people may add new branches there, or update the tip of existing
 branches outside your control.
 +
-This is currently the default, but Git 2.0 will change the default
-to `simple`.
+This used to be the default, but not since Git 2.0 (`simple` is the
+new default).
 
 --
 

Documentation/git-push.txt

@@ -78,8 +78,8 @@ the local side, the remote side is updated if a branch of the same name
 already exists on the remote side.
 
 --all::
-	Instead of naming each ref to push, specifies that all
-	refs under `refs/heads/` be pushed.
+	Push all branches (i.e. refs under `refs/heads/`); cannot be
+	used with other <refspec>.
 
 --prune::
 	Remove remote branches that don't have a local counterpart. For example
@@ -437,8 +437,10 @@ Examples
 	configured for the current branch).
 
 `git push origin`::
-	Without additional configuration, works like
-	`git push origin :`.
+	Without additional configuration, pushes the current branch to
+	the configured upstream (`remote.origin.merge` configuration
+	variable) if it has the same name as the current branch, and
+	errors out without pushing otherwise.
 +
 The default behavior of this command when no <refspec> is given can be
 configured by setting the `push` option of the remote, or the `push.default`

advice.c

@@ -2,7 +2,6 @@
 
 int advice_push_update_rejected = 1;
 int advice_push_non_ff_current = 1;
-int advice_push_non_ff_default = 1;
 int advice_push_non_ff_matching = 1;
 int advice_push_already_exists = 1;
 int advice_push_fetch_first = 1;
@@ -23,7 +22,6 @@ static struct {
 } advice_config[] = {
 	{ "pushupdaterejected", &advice_push_update_rejected },
 	{ "pushnonffcurrent", &advice_push_non_ff_current },
-	{ "pushnonffdefault", &advice_push_non_ff_default },
 	{ "pushnonffmatching", &advice_push_non_ff_matching },
 	{ "pushalreadyexists", &advice_push_already_exists },
 	{ "pushfetchfirst", &advice_push_fetch_first },

advice.h

@@ -5,7 +5,6 @@
 
 extern int advice_push_update_rejected;
 extern int advice_push_non_ff_current;
-extern int advice_push_non_ff_default;
 extern int advice_push_non_ff_matching;
 extern int advice_push_already_exists;
 extern int advice_push_fetch_first;

builtin/push.c

@@ -26,7 +26,6 @@ static struct push_cas_option cas;
 static const char **refspec;
 static int refspec_nr;
 static int refspec_alloc;
-static int default_matching_used;
 
 static void add_refspec(const char *ref)
 {
@@ -164,9 +163,9 @@ static void setup_push_current(struct remote *remote, struct branch *branch)
 }
 
 static char warn_unspecified_push_default_msg[] =
-N_("push.default is unset; its implicit value is changing in\n"
+N_("push.default is unset; its implicit value has changed in\n"
    "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
-   "and maintain the current behavior after the default changes, use:\n"
+   "and maintain the traditional behavior, use:\n"
    "\n"
    "  git config --global push.default matching\n"
    "\n"
@@ -177,7 +176,7 @@ N_("push.default is unset; its implicit value is changing in\n"
    "When push.default is set to 'matching', git will push local branches\n"
    "to the remote branches that already exist with the same name.\n"
    "\n"
-   "In Git 2.0, Git will default to the more conservative 'simple'\n"
+   "Since Git 2.0, Git defaults to the more conservative 'simple'\n"
    "behavior, which only pushes the current branch to the corresponding\n"
    "remote branch that 'git pull' uses to update the current branch.\n"
    "\n"
@@ -207,14 +206,14 @@ static void setup_default_push_refspecs(struct remote *remote)
 
 	switch (push_default) {
 	default:
-	case PUSH_DEFAULT_UNSPECIFIED:
-		default_matching_used = 1;
-		warn_unspecified_push_default_configuration();
-		/* fallthru */
 	case PUSH_DEFAULT_MATCHING:
 		add_refspec(":");
 		break;
 
+	case PUSH_DEFAULT_UNSPECIFIED:
+		warn_unspecified_push_default_configuration();
+		/* fallthru */
+
 	case PUSH_DEFAULT_SIMPLE:
 		if (triangular)
 			setup_push_current(remote, branch);
@@ -243,12 +242,6 @@ static const char message_advice_pull_before_push[] =
 	   "'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[] =
-	N_("Updates were rejected because a pushed branch tip is behind its remote\n"
-	   "counterpart. If you did not intend to push that branch, you may want to\n"
-	   "specify branches to push or set the 'push.default' configuration variable\n"
-	   "to 'simple', 'current' or 'upstream' to push only the current branch.");
-
 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 integrate the remote changes\n"
@@ -277,13 +270,6 @@ static void advise_pull_before_push(void)
 	advise(_(message_advice_pull_before_push));
 }
 
-static void advise_use_upstream(void)
-{
-	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_update_rejected)
@@ -345,10 +331,7 @@ static int push_with_options(struct transport *transport, int flags)
 	if (reject_reasons & REJECT_NON_FF_HEAD) {
 		advise_pull_before_push();
 	} else if (reject_reasons & REJECT_NON_FF_OTHER) {
-		if (default_matching_used)
-			advise_use_upstream();
-		else
-			advise_checkout_pull_push();
+		advise_checkout_pull_push();
 	} else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 		advise_ref_already_exists();
 	} else if (reject_reasons & REJECT_FETCH_FIRST) {