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add: check color.ui for interactive add

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When 'git add -i' and 'git add -p' were converted to a builtin, they
introduced a color bug: the 'color.ui' config setting is ignored.

The included test demonstrates an example that is similar to the
previous test, which focuses on customizing colors. Here, we are
demonstrating that colors are not being used at all by comparing the raw
output and the color-decoded version of that output.

The fix is simple, to use git_color_default_config() as the fallback for
git_add_config(). A more robust change would instead encapsulate the
git_use_color_default global in methods that would check the config
setting if it has not been initialized yet. Some ideas are being
discussed on this front [1], but nothing has been finalized.

[1] https://lore.kernel.org/git/pull.1539.git.1685716420.gitgitgadget@gmail.com/

This test case naturally bisects down to 0527ccb1b5 (add -i: default to
the built-in implementation, 2021-11-30), but the fix makes it clear
that this would be broken even if we added the config to use the builtin
earlier than this.

Reported-by: Greg Alexander <gitgreg@galexander.org>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2023-06-06 14:20:18 +00:00 committed by Junio C Hamano
parent 0d1bd1dfb3
commit 7cf3b49f47
2 changed files with 16 additions and 1 deletions
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2
builtin/add.c
View file

@ -362,7 +362,7 @@ static int add_config(const char *var, const char *value, void *cb)
return 0;
}
return git_default_config(var, value, cb);
return git_color_default_config(var, value, cb);
}
static const char embedded_advice[] = N_(

15
t/t3701-add-interactive.sh
View file

@ -738,6 +738,21 @@ test_expect_success 'colors can be overridden' '
test_cmp expect actual
'
test_expect_success 'colors can be skipped with color.ui=false' '
git reset --hard &&
test_when_finished "git rm -f color-test" &&
test_write_lines context old more-context >color-test &&
git add color-test &&
test_write_lines context new more-context another-one >color-test &&
test_write_lines help quit >input &&
force_color git \
-c color.ui=false \
add -i >actual.raw <input &&
test_decode_color <actual.raw >actual &&
test_cmp actual.raw actual
'
test_expect_success 'colorized diffs respect diff.wsErrorHighlight' '
git reset --hard &&