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>

Author: gitster

Documentation/config.txt

@@ -142,17 +142,11 @@ advice.*::
 --
 	pushNonFastForward::
 		Set this variable to 'false' if you want to disable
-		'pushNonFFCurrent', 'pushNonFFDefault', and
+		'pushNonFFCurrent', and
 		'pushNonFFMatching' 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
@@ -1750,15 +1744,15 @@ push.default::
   since locally stalled branches will attempt a non-fast forward push
   if other users updated the branch.
   +
-  This is currently the default, but Git 2.0 will change the default
-  to `simple`.
+  This used to be the default, and stale web sites may still say so,
+  but Git 2.0 has changed the default to `simple`.
 * `upstream` - push the current branch to its upstream branch.
   With this, `git push` will update the same remote ref as the one which
   is merged by `git pull`, making `push` and `pull` symmetrical.
   See "branch.<name>.merge" for how to configure the upstream branch.
 * `simple` - like `upstream`, but refuses to push if the upstream
   branch's name is different from the local one. This is the safest
-  option and is well-suited for beginners. It will become the default
+  option and is well-suited for beginners. It has become the default
   in Git 2.0.
 * `current` - push the current branch to a branch of the same name.
 --

Documentation/git-push.txt

@@ -36,10 +36,14 @@ OPTIONS[[OPTIONS]]
 	The format of a <refspec> parameter is an optional plus
 	`+`, followed by the source ref <src>, followed
 	by a colon `:`, followed by the destination ref <dst>.
-	It is used to specify with what <src> object the <dst> ref
-	in the remote repository is to be updated.  If not specified,
+	It is used to specify what <src> object the <dst> ref
+	in the remote repository is to be updated to.  If no
+	<refspec> is specified on the command line, and if no
+	<refspec> is configured for the <repository>,
 	the behavior of the command is controlled by the `push.default`
-	configuration variable.
+	configuration variable, and if it is unset, the `simple`
+	behaviour is used (see lingit:git-config[1] and look
+	for `push.default`).
 +
 The <src> is often the name of the branch you would want to push, but
 it can be any arbitrary "SHA-1 expression", such as `master~4` or
@@ -65,14 +69,11 @@ the remote repository.
 The special refspec `:` (or `+:` to allow non-fast-forward updates)
 directs git to push "matching" branches: for every branch that exists on
 the local side, the remote side is updated if a branch of the same name
-already exists on the remote side.  This is the default operation mode
-if no explicit refspec is found (that is neither on the command line
-nor in any Push line of the corresponding remotes file---see below) and
-no `push.default` configuration variable is set.
+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
@@ -357,8 +358,10 @@ 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_nonfastforward = 1;
 int advice_push_non_ff_current = 1;
-int advice_push_non_ff_default = 1;
 int advice_push_non_ff_matching = 1;
 int advice_status_hints = 1;
 int advice_commit_before_merge = 1;
@@ -16,7 +15,6 @@ static struct {
 } advice_config[] = {
 	{ "pushnonfastforward", &advice_push_nonfastforward },
 	{ "pushnonffcurrent", &advice_push_non_ff_current },
-	{ "pushnonffdefault", &advice_push_non_ff_default },
 	{ "pushnonffmatching", &advice_push_non_ff_matching },
 	{ "statushints", &advice_status_hints },
 	{ "commitbeforemerge", &advice_commit_before_merge },

advice.h

@@ -5,7 +5,6 @@
 
 extern int advice_push_nonfastforward;
 extern int advice_push_non_ff_current;
-extern int advice_push_non_ff_default;
 extern int advice_push_non_ff_matching;
 extern int advice_status_hints;
 extern int advice_commit_before_merge;

builtin/push.c

@@ -24,7 +24,6 @@ static int progress = -1;
 static const char **refspec;
 static int refspec_nr;
 static int refspec_alloc;
-static int default_matching_used;
 
 static void add_refspec(const char *ref)
 {
@@ -148,9 +147,9 @@ static void setup_push_upstream(struct remote *remote, int simple)
 }
 
 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"
@@ -175,14 +174,14 @@ 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:
 		setup_push_upstream(remote, 1);
 		break;
@@ -208,12 +207,6 @@ static const char message_advice_pull_before_push[] =
 	   "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 merge the remote changes\n"
@@ -227,13 +220,6 @@ 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_nonfastforward)
-		return;
-	advise(_(message_advice_use_upstream));
-}
-
 static void advise_checkout_pull_push(void)
 {
 	if (!advice_push_non_ff_matching || !advice_push_nonfastforward)
@@ -272,10 +258,7 @@ static int push_with_options(struct transport *transport, int flags)
 		advise_pull_before_push();
 		break;
 	case NON_FF_OTHER:
-		if (default_matching_used)
-			advise_use_upstream();
-		else
-			advise_checkout_pull_push();
+		advise_checkout_pull_push();
 		break;
 	}