pretty: colorize pattern matches in commit messages
The "git log" command limits its output to the commits that contain strings
matched by a pattern when the "--grep=<pattern>" option is used, but unlike
output from "git grep -e <pattern>", the matches are not highlighted,
making them harder to spot.
Teach the pretty-printer code to highlight matches from the
"--grep=<pattern>", "--author=<pattern>" and "--committer=<pattern>"
options (to view the last one, you may have to ask for --pretty=fuller).
Also, it must be noted that we are effectively greping the content twice
(because it would be a hassle to rework the existing matching code to do
a /g match and then pass it all down to the coloring code), however it only
slows down "git log --author=^H" on this repository by around 1-2%
(compared to v2.33.0), so it should be a small enough slow down to justify
the addition of the feature.
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 9dfead9..3d240bb 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -449,6 +449,57 @@
)
'
+test_expect_success 'log --author' '
+ cat >expect <<-\EOF &&
+ Author: <BOLD;RED>A U<RESET> Thor <author@example.com>
+ EOF
+ git log -1 --color=always --author="A U" >log &&
+ grep Author log >actual.raw &&
+ test_decode_color <actual.raw >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'log --committer' '
+ cat >expect <<-\EOF &&
+ Commit: C O Mitter <committer@<BOLD;RED>example<RESET>.com>
+ EOF
+ git log -1 --color=always --pretty=fuller --committer="example" >log &&
+ grep "Commit:" log >actual.raw &&
+ test_decode_color <actual.raw >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'log -i --grep with color' '
+ cat >expect <<-\EOF &&
+ <BOLD;RED>Sec<RESET>ond
+ <BOLD;RED>sec<RESET>ond
+ EOF
+ git log --color=always -i --grep=^sec >log &&
+ grep -i sec log >actual.raw &&
+ test_decode_color <actual.raw >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '-c color.grep.selected log --grep' '
+ cat >expect <<-\EOF &&
+ <GREEN>th<RESET><BOLD;RED>ir<RESET><GREEN>d<RESET>
+ EOF
+ git -c color.grep.selected="green" log --color=always --grep=ir >log &&
+ grep ir log >actual.raw &&
+ test_decode_color <actual.raw >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '-c color.grep.matchSelected log --grep' '
+ cat >expect <<-\EOF &&
+ <BLUE>i<RESET>n<BLUE>i<RESET>t<BLUE>i<RESET>al
+ EOF
+ git -c color.grep.matchSelected="blue" log --color=always --grep=i >log &&
+ grep al log >actual.raw &&
+ test_decode_color <actual.raw >actual &&
+ test_cmp expect actual
+'
+
cat > expect <<EOF
* Second
* sixth
