Merge branch 'bw/remote-rename-update-config'

"git remote rename X Y" needs to adjust configuration variables
(e.g. branch.<name>.remote) whose value used to be X to Y.
branch.<name>.pushRemote is now also updated.

* bw/remote-rename-update-config:
  remote rename/remove: gently handle remote.pushDefault config
  config: provide access to the current line number
  remote rename/remove: handle branch.<name>.pushRemote config values
  remote: clean-up config callback
  remote: clean-up by returning early to avoid one indentation
  pull --rebase/remote rename: document and honor single-letter abbreviations rebase types

12 files changed, 305 insertions, 90 deletions

diff --git a/Documentation/config/branch.txt b/Documentation/config/branch.txt
index a592d522a7..cc5f3249fc 100644
--- a/Documentation/config/branch.txt
+++ b/Documentation/config/branch.txt
@@ -81,15 +81,16 @@ branch.<name>.rebase::
 	"git pull" is run. See "pull.rebase" for doing this in a non
 	branch-specific manner.
 +
-When `merges`, pass the `--rebase-merges` option to 'git rebase'
+When `merges` (or just 'm'), pass the `--rebase-merges` option to 'git rebase'
 so that the local merge commits are included in the rebase (see
 linkgit:git-rebase[1] for details).
 +
-When `preserve` (deprecated in favor of `merges`), also pass
+When `preserve` (or just 'p', deprecated in favor of `merges`), also pass
 `--preserve-merges` along to 'git rebase' so that locally committed merge
 commits will not be flattened by running 'git pull'.
 +
-When the value is `interactive`, the rebase is run in interactive mode.
+When the value is `interactive` (or just 'i'), the rebase is run in interactive
+mode.
 +
 *NOTE*: this is a possibly dangerous operation; do *not* use
 it unless you understand the implications (see linkgit:git-rebase[1]
diff --git a/Documentation/config/pull.txt b/Documentation/config/pull.txt
index b87cab31b3..5404830609 100644
--- a/Documentation/config/pull.txt
+++ b/Documentation/config/pull.txt
@@ -14,15 +14,16 @@ pull.rebase::
 	pull" is run. See "branch.<name>.rebase" for setting this on a
 	per-branch basis.
 +
-When `merges`, pass the `--rebase-merges` option to 'git rebase'
+When `merges` (or just 'm'), pass the `--rebase-merges` option to 'git rebase'
 so that the local merge commits are included in the rebase (see
 linkgit:git-rebase[1] for details).
 +
-When `preserve` (deprecated in favor of `merges`), also pass
+When `preserve` (or just 'p', deprecated in favor of `merges`), also pass
 `--preserve-merges` along to 'git rebase' so that locally committed merge
 commits will not be flattened by running 'git pull'.
 +
-When the value is `interactive`, the rebase is run in interactive mode.
+When the value is `interactive` (or just 'i'), the rebase is run in interactive
+mode.
 +
 *NOTE*: this is a possibly dangerous operation; do *not* use
 it unless you understand the implications (see linkgit:git-rebase[1]
diff --git a/Makefile b/Makefile
index 6134104ae6..9804a0758b 100644
--- a/Makefile
+++ b/Makefile
@@ -955,6 +955,7 @@ LIB_OBJS += quote.o
 LIB_OBJS += range-diff.o
 LIB_OBJS += reachable.o
 LIB_OBJS += read-cache.o
+LIB_OBJS += rebase.o
 LIB_OBJS += rebase-interactive.o
 LIB_OBJS += reflog-walk.o
 LIB_OBJS += refs.o
diff --git a/builtin/pull.c b/builtin/pull.c
index d4e3e77c8e..3e624d1e00 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -15,6 +15,7 @@
 #include "sha1-array.h"
 #include "remote.h"
 #include "dir.h"
+#include "rebase.h"
 #include "refs.h"
 #include "refspec.h"
 #include "revision.h"
@@ -26,15 +27,6 @@
 #include "commit-reach.h"
 #include "sequencer.h"
 
-enum rebase_type {
-	REBASE_INVALID = -1,
-	REBASE_FALSE = 0,
-	REBASE_TRUE,
-	REBASE_PRESERVE,
-	REBASE_MERGES,
-	REBASE_INTERACTIVE
-};
-
 /**
  * Parses the value of --rebase. If value is a false value, returns
  * REBASE_FALSE. If value is a true value, returns REBASE_TRUE. If value is
@@ -45,22 +37,9 @@ enum rebase_type {
 static enum rebase_type parse_config_rebase(const char *key, const char *value,
 		int fatal)
 {
-	int v = git_parse_maybe_bool(value);
-
-	if (!v)
-		return REBASE_FALSE;
-	else if (v > 0)
-		return REBASE_TRUE;
-	else if (!strcmp(value, "preserve") || !strcmp(value, "p"))
-		return REBASE_PRESERVE;
-	else if (!strcmp(value, "merges") || !strcmp(value, "m"))
-		return REBASE_MERGES;
-	else if (!strcmp(value, "interactive") || !strcmp(value, "i"))
-		return REBASE_INTERACTIVE;
-	/*
-	 * Please update _git_config() in git-completion.bash when you
-	 * add new rebase modes.
-	 */
+	enum rebase_type v = rebase_parse_value(value);
+	if (v != REBASE_INVALID)
+		return v;
 
 	if (fatal)
 		die(_("Invalid value for %s: %s"), key, value);
diff --git a/builtin/remote.c b/builtin/remote.c
index 96bbe828fe..555d4c896c 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -6,6 +6,7 @@
 #include "string-list.h"
 #include "strbuf.h"
 #include "run-command.h"
+#include "rebase.h"
 #include "refs.h"
 #include "refspec.h"
 #include "object-store.h"
@@ -248,9 +249,8 @@ static int add(int argc, const char **argv)
 struct branch_info {
 	char *remote_name;
 	struct string_list merge;
-	enum {
-		NO_REBASE, NORMAL_REBASE, INTERACTIVE_REBASE, REBASE_MERGES
-	} rebase;
+	enum rebase_type rebase;
+	char *push_remote_name;
 };
 
 static struct string_list branch_list = STRING_LIST_INIT_NODUP;
@@ -264,59 +264,69 @@ static const char *abbrev_ref(const char *name, const char *prefix)
 
 static int config_read_branches(const char *key, const char *value, void *cb)
 {
-	if (starts_with(key, "branch.")) {
-		const char *orig_key = key;
-		char *name;
-		struct string_list_item *item;
-		struct branch_info *info;
-		enum { REMOTE, MERGE, REBASE } type;
-		size_t key_len;
-
-		key += 7;
-		if (strip_suffix(key, ".remote", &key_len)) {
-			name = xmemdupz(key, key_len);
-			type = REMOTE;
-		} else if (strip_suffix(key, ".merge", &key_len)) {
-			name = xmemdupz(key, key_len);
-			type = MERGE;
-		} else if (strip_suffix(key, ".rebase", &key_len)) {
-			name = xmemdupz(key, key_len);
-			type = REBASE;
-		} else
-			return 0;
+	const char *orig_key = key;
+	char *name;
+	struct string_list_item *item;
+	struct branch_info *info;
+	enum { REMOTE, MERGE, REBASE, PUSH_REMOTE } type;
+	size_t key_len;
 
-		item = string_list_insert(&branch_list, name);
+	if (!starts_with(key, "branch."))
+		return 0;
 
-		if (!item->util)
-			item->util = xcalloc(1, sizeof(struct branch_info));
-		info = item->util;
-		if (type == REMOTE) {
-			if (info->remote_name)
-				warning(_("more than one %s"), orig_key);
-			info->remote_name = xstrdup(value);
-		} else if (type == MERGE) {
-			char *space = strchr(value, ' ');
-			value = abbrev_branch(value);
-			while (space) {
-				char *merge;
-				merge = xstrndup(value, space - value);
-				string_list_append(&info->merge, merge);
-				value = abbrev_branch(space + 1);
-				space = strchr(value, ' ');
-			}
-			string_list_append(&info->merge, xstrdup(value));
-		} else {
-			int v = git_parse_maybe_bool(value);
-			if (v >= 0)
-				info->rebase = v;
-			else if (!strcmp(value, "preserve"))
-				info->rebase = NORMAL_REBASE;
-			else if (!strcmp(value, "merges"))
-				info->rebase = REBASE_MERGES;
-			else if (!strcmp(value, "interactive"))
-				info->rebase = INTERACTIVE_REBASE;
+	key += strlen("branch.");
+	if (strip_suffix(key, ".remote", &key_len))
+		type = REMOTE;
+	else if (strip_suffix(key, ".merge", &key_len))
+		type = MERGE;
+	else if (strip_suffix(key, ".rebase", &key_len))
+		type = REBASE;
+	else if (strip_suffix(key, ".pushremote", &key_len))
+		type = PUSH_REMOTE;
+	else
+		return 0;
+	name = xmemdupz(key, key_len);
+
+	item = string_list_insert(&branch_list, name);
+
+	if (!item->util)
+		item->util = xcalloc(1, sizeof(struct branch_info));
+	info = item->util;
+	switch (type) {
+	case REMOTE:
+		if (info->remote_name)
+			warning(_("more than one %s"), orig_key);
+		info->remote_name = xstrdup(value);
+		break;
+	case MERGE: {
+		char *space = strchr(value, ' ');
+		value = abbrev_branch(value);
+		while (space) {
+			char *merge;
+			merge = xstrndup(value, space - value);
+			string_list_append(&info->merge, merge);
+			value = abbrev_branch(space + 1);
+			space = strchr(value, ' ');
 		}
+		string_list_append(&info->merge, xstrdup(value));
+		break;
+	}
+	case REBASE:
+		/*
+		 * Consider invalid values as false and check the
+		 * truth value with >= REBASE_TRUE.
+		 */
+		info->rebase = rebase_parse_value(value);
+		break;
+	case PUSH_REMOTE:
+		if (info->push_remote_name)
+			warning(_("more than one %s"), orig_key);
+		info->push_remote_name = xstrdup(value);
+		break;
+	default:
+		BUG("unexpected type=%d", type);
 	}
+
 	return 0;
 }
 
@@ -605,6 +615,56 @@ static int migrate_file(struct remote *remote)
 	return 0;
 }
 
+struct push_default_info
+{
+	const char *old_name;
+	enum config_scope scope;
+	struct strbuf origin;
+	int linenr;
+};
+
+static int config_read_push_default(const char *key, const char *value,
+	void *cb)
+{
+	struct push_default_info* info = cb;
+	if (strcmp(key, "remote.pushdefault") ||
+	    !value || strcmp(value, info->old_name))
+		return 0;
+
+	info->scope = current_config_scope();
+	strbuf_reset(&info->origin);
+	strbuf_addstr(&info->origin, current_config_name());
+	info->linenr = current_config_line();
+
+	return 0;
+}
+
+static void handle_push_default(const char* old_name, const char* new_name)
+{
+	struct push_default_info push_default = {
+		old_name, CONFIG_SCOPE_UNKNOWN, STRBUF_INIT, -1 };
+	git_config(config_read_push_default, &push_default);
+	if (push_default.scope >= CONFIG_SCOPE_COMMAND)
+		; /* pass */
+	else if (push_default.scope >= CONFIG_SCOPE_LOCAL) {
+		int result = git_config_set_gently("remote.pushDefault",
+						   new_name);
+		if (new_name && result && result != CONFIG_NOTHING_SET)
+			die(_("could not set '%s'"), "remote.pushDefault");
+		else if (!new_name && result && result != CONFIG_NOTHING_SET)
+			die(_("could not unset '%s'"), "remote.pushDefault");
+	} else if (push_default.scope >= CONFIG_SCOPE_SYSTEM) {
+		/* warn */
+		warning(_("The %s configuration remote.pushDefault in:\n"
+			  "\t%s:%d\n"
+			  "now names the non-existent remote '%s'"),
+			config_scope_name(push_default.scope),
+			push_default.origin.buf, push_default.linenr,
+			old_name);
+	}
+}
+
+
 static int mv(int argc, const char **argv)
 {
 	struct option options[] = {
@@ -680,6 +740,11 @@ static int mv(int argc, const char **argv)
 			strbuf_addf(&buf, "branch.%s.remote", item->string);
 			git_config_set(buf.buf, rename.new_name);
 		}
+		if (info->push_remote_name && !strcmp(info->push_remote_name, rename.old_name)) {
+			strbuf_reset(&buf);
+			strbuf_addf(&buf, "branch.%s.pushremote", item->string);
+			git_config_set(buf.buf, rename.new_name);
+		}
 	}
 
 	if (!refspec_updated)
@@ -735,6 +800,9 @@ static int mv(int argc, const char **argv)
 			die(_("creating '%s' failed"), buf.buf);
 	}
 	string_list_clear(&remote_branches, 1);
+
+	handle_push_default(rename.old_name, rename.new_name);
+
 	return 0;
 }
 
@@ -781,6 +849,13 @@ static int rm(int argc, const char **argv)
 					die(_("could not unset '%s'"), buf.buf);
 			}
 		}
+		if (info->push_remote_name && !strcmp(info->push_remote_name, remote->name)) {
+			strbuf_reset(&buf);
+			strbuf_addf(&buf, "branch.%s.pushremote", item->string);
+			result = git_config_set_gently(buf.buf, NULL);
+			if (result && result != CONFIG_NOTHING_SET)
+				die(_("could not unset '%s'"), buf.buf);
+		}
 	}
 
 	/*
@@ -813,6 +888,8 @@ static int rm(int argc, const char **argv)
 		strbuf_addf(&buf, "remote.%s", remote->name);
 		if (git_config_rename_section(buf.buf, NULL) < 1)
 			return error(_("Could not remove config section '%s'"), buf.buf);
+
+		handle_push_default(remote->name, NULL);
 	}
 
 	return result;
@@ -943,7 +1020,7 @@ static int add_local_to_show_info(struct string_list_item *branch_item, void *cb
 		return 0;
 	if ((n = strlen(branch_item->string)) > show_info->width)
 		show_info->width = n;
-	if (branch_info->rebase)
+	if (branch_info->rebase >= REBASE_TRUE)
 		show_info->any_rebase = 1;
 
 	item = string_list_insert(show_info->list, branch_item->string);
@@ -960,16 +1037,16 @@ static int show_local_info_item(struct string_list_item *item, void *cb_data)
 	int width = show_info->width + 4;
 	int i;
 
-	if (branch_info->rebase && branch_info->merge.nr > 1) {
+	if (branch_info->rebase >= REBASE_TRUE && branch_info->merge.nr > 1) {
 		error(_("invalid branch.%s.merge; cannot rebase onto > 1 branch"),
 			item->string);
 		return 0;
 	}
 
 	printf("    %-*s ", show_info->width, item->string);
-	if (branch_info->rebase) {
+	if (branch_info->rebase >= REBASE_TRUE) {
 		const char *msg;
-		if (branch_info->rebase == INTERACTIVE_REBASE)
+		if (branch_info->rebase == REBASE_INTERACTIVE)
 			msg = _("rebases interactively onto remote %s");
 		else if (branch_info->rebase == REBASE_MERGES)
 			msg = _("rebases interactively (with merges) onto "
diff --git a/config.c b/config.c
index 79b0a56af8..d17d2bd9dc 100644
--- a/config.c
+++ b/config.c
@@ -3338,6 +3338,14 @@ enum config_scope current_config_scope(void)
 		return current_parsing_scope;
 }
 
+int current_config_line(void)
+{
+	if (current_config_kvi)
+		return current_config_kvi->linenr;
+	else
+		return cf->linenr;
+}
+
 int lookup_config(const char **mapping, int nr_mapping, const char *var)
 {
 	int i;
diff --git a/config.h b/config.h
index fe0addb0dc..9b3773f778 100644
--- a/config.h
+++ b/config.h
@@ -309,6 +309,7 @@ int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
 enum config_scope current_config_scope(void);
 const char *current_config_origin_type(void);
 const char *current_config_name(void);
+int current_config_line(void);
 
 /**
  * Include Directives
diff --git a/rebase.c b/rebase.c
new file mode 100644
index 0000000000..f8137d859b
--- /dev/null
+++ b/rebase.c
@@ -0,0 +1,35 @@
+#include "rebase.h"
+#include "config.h"
+
+/*
+ * Parses textual value for pull.rebase, branch.<name>.rebase, etc.
+ * Unrecognised value yields REBASE_INVALID, which traditionally is
+ * treated the same way as REBASE_FALSE.
+ *
+ * The callers that care if (any) rebase is requested should say
+ *   if (REBASE_TRUE <= rebase_parse_value(string))
+ *
+ * The callers that want to differenciate an unrecognised value and
+ * false can do so by treating _INVALID and _FALSE differently.
+ */
+enum rebase_type rebase_parse_value(const char *value)
+{
+	int v = git_parse_maybe_bool(value);
+
+	if (!v)
+		return REBASE_FALSE;
+	else if (v > 0)
+		return REBASE_TRUE;
+	else if (!strcmp(value, "preserve") || !strcmp(value, "p"))
+		return REBASE_PRESERVE;
+	else if (!strcmp(value, "merges") || !strcmp(value, "m"))
+		return REBASE_MERGES;
+	else if (!strcmp(value, "interactive") || !strcmp(value, "i"))
+		return REBASE_INTERACTIVE;
+	/*
+	 * Please update _git_config() in git-completion.bash when you
+	 * add new rebase modes.
+	 */
+
+	return REBASE_INVALID;
+}
diff --git a/rebase.h b/rebase.h
new file mode 100644
index 0000000000..cc723d4748
--- /dev/null
+++ b/rebase.h
@@ -0,0 +1,15 @@
+#ifndef REBASE_H
+#define REBASE_H
+
+enum rebase_type {
+	REBASE_INVALID = -1,
+	REBASE_FALSE = 0,
+	REBASE_TRUE,
+	REBASE_PRESERVE,
+	REBASE_MERGES,
+	REBASE_INTERACTIVE
+};
+
+enum rebase_type rebase_parse_value(const char *value);
+
+#endif /* REBASE */
diff --git a/t/helper/test-config.c b/t/helper/test-config.c
index 1e3bc7c8f4..234c722b48 100644
--- a/t/helper/test-config.c
+++ b/t/helper/test-config.c
@@ -48,6 +48,7 @@ static int iterate_cb(const char *var, const char *value, void *data)
 	printf("value=%s\n", value ? value : "(null)");
 	printf("origin=%s\n", current_config_origin_type());
 	printf("name=%s\n", current_config_name());
+	printf("lno=%d\n", current_config_line());
 	printf("scope=%s\n", config_scope_name(current_config_scope()));
 
 	return 0;
diff --git a/t/t1308-config-set.sh b/t/t1308-config-set.sh
index fba0abe429..3a527e3a84 100755
--- a/t/t1308-config-set.sh
+++ b/t/t1308-config-set.sh
@@ -238,8 +238,8 @@ test_expect_success 'error on modifying repo config without repo' '
 
 cmdline_config="'foo.bar=from-cmdline'"
 test_expect_success 'iteration shows correct origins' '
-	echo "[foo]bar = from-repo" >.git/config &&
-	echo "[foo]bar = from-home" >.gitconfig &&
+	printf "[ignore]\n\tthis = please\n[foo]bar = from-repo\n" >.git/config &&
+	printf "[foo]\n\tbar = from-home\n" >.gitconfig &&
 	if test_have_prereq MINGW
 	then
 		# Use Windows path (i.e. *not* $HOME)
@@ -253,18 +253,28 @@ test_expect_success 'iteration shows correct origins' '
 	value=from-home
 	origin=file
 	name=$HOME_GITCONFIG
+	lno=2
 	scope=global
 
+	key=ignore.this
+	value=please
+	origin=file
+	name=.git/config
+	lno=2
+	scope=local
+
 	key=foo.bar
 	value=from-repo
 	origin=file
 	name=.git/config
+	lno=3
 	scope=local
 
 	key=foo.bar
 	value=from-cmdline
 	origin=command line
 	name=
+	lno=-1
 	scope=command
 	EOF
 	GIT_CONFIG_PARAMETERS=$cmdline_config test-tool config iterate >actual &&
diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh
index 883b32efa0..dda81b7d07 100755
--- a/t/t5505-remote.sh
+++ b/t/t5505-remote.sh
@@ -734,15 +734,53 @@ test_expect_success 'reject adding remote with an invalid name' '
 # the last two ones check if the config is updated.
 
 test_expect_success 'rename a remote' '
+	test_config_global remote.pushDefault origin &&
 	git clone one four &&
 	(
 		cd four &&
+		git config branch.master.pushRemote origin &&
 		git remote rename origin upstream &&
 		test -z "$(git for-each-ref refs/remotes/origin)" &&
 		test "$(git symbolic-ref refs/remotes/upstream/HEAD)" = "refs/remotes/upstream/master" &&
 		test "$(git rev-parse upstream/master)" = "$(git rev-parse master)" &&
 		test "$(git config remote.upstream.fetch)" = "+refs/heads/*:refs/remotes/upstream/*" &&
-		test "$(git config branch.master.remote)" = "upstream"
+		test "$(git config branch.master.remote)" = "upstream" &&
+		test "$(git config branch.master.pushRemote)" = "upstream" &&
+		test "$(git config --global remote.pushDefault)" = "origin"
+	)
+'
+
+test_expect_success 'rename a remote renames repo remote.pushDefault' '
+	git clone one four.1 &&
+	(
+		cd four.1 &&
+		git config remote.pushDefault origin &&
+		git remote rename origin upstream &&
+		test "$(git config --local remote.pushDefault)" = "upstream"
+	)
+'
+
+test_expect_success 'rename a remote renames repo remote.pushDefault but ignores global' '
+	test_config_global remote.pushDefault other &&
+	git clone one four.2 &&
+	(
+		cd four.2 &&
+		git config remote.pushDefault origin &&
+		git remote rename origin upstream &&
+		test "$(git config --global remote.pushDefault)" = "other" &&
+		test "$(git config --local remote.pushDefault)" = "upstream"
+	)
+'
+
+test_expect_success 'rename a remote renames repo remote.pushDefault but keeps global' '
+	test_config_global remote.pushDefault origin &&
+	git clone one four.3 &&
+	(
+		cd four.3 &&
+		git config remote.pushDefault origin &&
+		git remote rename origin upstream &&
+		test "$(git config --global remote.pushDefault)" = "origin" &&
+		test "$(git config --local remote.pushDefault)" = "upstream"
 	)
 '
 
@@ -784,6 +822,54 @@ test_expect_success 'rename succeeds with existing remote.<target>.prune' '
 	git -C four.four remote rename origin upstream
 '
 
+test_expect_success 'remove a remote' '
+	test_config_global remote.pushDefault origin &&
+	git clone one four.five &&
+	(
+		cd four.five &&
+		git config branch.master.pushRemote origin &&
+		git remote remove origin &&
+		test -z "$(git for-each-ref refs/remotes/origin)" &&
+		test_must_fail git config branch.master.remote &&
+		test_must_fail git config branch.master.pushRemote &&
+		test "$(git config --global remote.pushDefault)" = "origin"
+	)
+'
+
+test_expect_success 'remove a remote removes repo remote.pushDefault' '
+	git clone one four.five.1 &&
+	(
+		cd four.five.1 &&
+		git config remote.pushDefault origin &&
+		git remote remove origin &&
+		test_must_fail git config --local remote.pushDefault
+	)
+'
+
+test_expect_success 'remove a remote removes repo remote.pushDefault but ignores global' '
+	test_config_global remote.pushDefault other &&
+	git clone one four.five.2 &&
+	(
+		cd four.five.2 &&
+		git config remote.pushDefault origin &&
+		git remote remove origin &&
+		test "$(git config --global remote.pushDefault)" = "other" &&
+		test_must_fail git config --local remote.pushDefault
+	)
+'
+
+test_expect_success 'remove a remote removes repo remote.pushDefault but keeps global' '
+	test_config_global remote.pushDefault origin &&
+	git clone one four.five.3 &&
+	(
+		cd four.five.3 &&
+		git config remote.pushDefault origin &&
+		git remote remove origin &&
+		test "$(git config --global remote.pushDefault)" = "origin" &&
+		test_must_fail git config --local remote.pushDefault
+	)
+'
+
 cat >remotes_origin <<EOF
 URL: $(pwd)/one
 Push: refs/heads/master:refs/heads/upstream