From 9fa708dab1ccf8be69a606ca4eb58e62f3ef334a Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Sun, 4 Oct 2009 23:43:32 -0700
Subject: Pretty-format: %[+-]x to tweak inter-item newlines

This teaches the "pretty" machinery to expand '%+x' to a LF followed by
the expansion of '%x' if and only if '%x' expands to a non-empty string,
and to remove LFs before '%-x' if '%x' expands to an empty string.  This
works for any supported expansion placeholder 'x'.

This is expected to be immediately useful to reproduce the commit log
message with "%s%+b%n"; "%s%n%b%n" adds one extra LF if the log message is
a one-liner.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t6006-rev-list-format.sh | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 't/t6006-rev-list-format.sh')

diff --git a/t/t6006-rev-list-format.sh b/t/t6006-rev-list-format.sh
index 59d1f6283b..18a77a739e 100755
--- a/t/t6006-rev-list-format.sh
+++ b/t/t6006-rev-list-format.sh
@@ -162,4 +162,26 @@ test_expect_success 'empty email' '
 	}
 '
 
+test_expect_success 'del LF before empty (1)' '
+	git show -s --pretty=format:"%s%n%-b%nThanks%n" HEAD^^ >actual &&
+	test $(wc -l <actual) = 2
+'
+
+test_expect_success 'del LF before empty (2)' '
+	git show -s --pretty=format:"%s%n%-b%nThanks%n" HEAD >actual &&
+	test $(wc -l <actual) = 6 &&
+	grep "^$" actual
+'
+
+test_expect_success 'add LF before non-empty (1)' '
+	git show -s --pretty=format:"%s%+b%nThanks%n" HEAD^^ >actual &&
+	test $(wc -l <actual) = 2
+'
+
+test_expect_success 'add LF before non-empty (2)' '
+	git show -s --pretty=format:"%s%+b%nThanks%n" HEAD >actual &&
+	test $(wc -l <actual) = 6 &&
+	grep "^$" actual
+'
+
 test_done
-- 
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