[PATHv2] branch.c:install_branch_config():Simplify code generating verbose message.

["Paweł Wawruch" <pawlo@aleg.pl>]

Simplify the long if chain in install_branch_config().

There is a long chain of if statements. The code can be more clear.
Replace the chain with table of strings. New approach is more
compact.

Signed-off-by: Paweł Wawruch <pawlo@aleg.pl>
---
 branch.c | 40 ++++++++++++++++++----------------------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/branch.c b/branch.c
index 723a36b..8d3b219 100644
--- a/branch.c
+++ b/branch.c
@@ -53,6 +53,18 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
 	int remote_is_branch = starts_with(remote, "refs/heads/");
 	struct strbuf key = STRBUF_INIT;
 	int rebasing = should_setup_rebase(origin);
+	const char *messages[] = {
+		N_("Branch %s set up to track remote branch %s from %s by rebasing."),
+		N_("Branch %s set up to track remote branch %s from %s."),
+		N_("Branch %s set up to track local branch %s by rebasing."),
+		N_("Branch %s set up to track local branch %s."),
+		N_("Branch %s set up to track remote ref %s by rebasing."),
+		N_("Branch %s set up to track remote ref %s."),
+		N_("Branch %s set up to track local ref %s by rebasing."),
+		N_("Branch %s set up to track local ref %s.")
+	};
+	const char *name = remote_is_branch ? remote : shortname;
+	int message_number;
 
 	if (remote_is_branch
 	    && !strcmp(local, shortname)
@@ -77,29 +89,13 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
 	strbuf_release(&key);
 
 	if (flag & BRANCH_CONFIG_VERBOSE) {
-		if (remote_is_branch && origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track remote branch %s from %s by rebasing.") :
-				  _("Branch %s set up to track remote branch %s from %s."),
-				  local, shortname, origin);
-		else if (remote_is_branch && !origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track local branch %s by rebasing.") :
-				  _("Branch %s set up to track local branch %s."),
-				  local, shortname);
-		else if (!remote_is_branch && origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track remote ref %s by rebasing.") :
-				  _("Branch %s set up to track remote ref %s."),
-				  local, remote);
-		else if (!remote_is_branch && !origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track local ref %s by rebasing.") :
-				  _("Branch %s set up to track local ref %s."),
-				  local, remote);
+		message_number = (!!rebasing) + 2 * (!!origin) + 4 * (!!remote_is_branch);
+		assert(message_number < ARRAY_SIZE(messages));
+
+		if (message_number < 2)
+			printf_ln(messages[message_number], local, name, origin);
 		else
-			die("BUG: impossible combination of %d and %p",
-			    remote_is_branch, origin);
+			printf_ln(messages[message_number], local, name);
 	}
 }
 
-- 
1.8.3.2