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[PATCH v3] install_branch_config: simplify verbose diagnostic logic

From: Paweł Wawruch <hidden>
Date: 2016-06-15 23:00:16
Subsystem: the rest · Maintainer: Linus Torvalds

Replace the chain of if statements with table of strings.

Signed-off-by: Paweł Wawruch <redacted>
---
I changed the commit message. Logic of table has changed. To make it more
clear I added three dimensions of the table. 

[1]: http://thread.gmane.org/gmane.comp.version-control.git/243502
[2]: http://thread.gmane.org/gmane.comp.version-control.git/243849

 branch.c | 42 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 22 deletions(-)
diff --git a/branch.c b/branch.c
index 723a36b..741551a 100644
--- a/branch.c
+++ b/branch.c
@@ -53,6 +53,21 @@ 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 *message[][2][2] = {{{
+			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 +92,12 @@ 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);
+		if (origin && remote_is_branch)
+			printf_ln(_(messages[!remote_is_branch][!origin][!rebasing]),
+				local, name, origin);
 		else
-			die("BUG: impossible combination of %d and %p",
-			    remote_is_branch, origin);
+			printf_ln(_(messages[!remote_is_branch][!origin][!rebasing]),
+				local, name);
 	}
 }
 
-- 
1.8.3.2
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