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format_commit_message: honor color=auto for %C(auto)

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git-log(1) documents that when specifying the `%C(auto)` format
placeholder will "turn on auto coloring on the next %placeholders
until the color is switched again."

However, when `%C(auto)` is used, the present implementation will turn
colors on unconditionally (even if the color configuration is turned off
for the current context - for example, `--no-color` was specified or the
color is `auto` and the output is not a tty).

Update `format_commit_one` to examine the current context when a format
string of `%C(auto)` is specified, which ensures that we will not
unconditionally write colors.  This brings that behavior in line with
the behavior of `%C(auto,<colorname>)`, and allows the user the ability
to specify that color should be displayed only when the output is a
tty.

Additionally, add a test for `%C(auto)` and update the existing tests
for `%C(auto,...)` as they were misidentified as being applicable to
`%C(auto)`.

Tests from Jeff King.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Edward Thomson <ethomson@edwardthomson.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Edward Thomson 2016-05-26 22:46:10 -05:00 committed by Junio C Hamano
parent 0f8e831356
commit b15a3e005a
2 changed files with 20 additions and 8 deletions
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2
pretty.c
View File

@ -1061,7 +1061,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
switch (placeholder[0]) {
case 'C':
if (starts_with(placeholder + 1, "(auto)")) {
c->auto_color = 1;
c->auto_color = want_color(c->pretty_ctx->color);
return 7; /* consumed 7 bytes, "C(auto)" */
} else {
int ret = parse_color(sb, placeholder, c);

26
t/t6006-rev-list-format.sh
View File

@ -184,38 +184,38 @@ commit $head1
foo
EOF
test_expect_success '%C(auto) does not enable color by default' '
test_expect_success '%C(auto,...) does not enable color by default' '
git log --format=$AUTO_COLOR -1 >actual &&
has_no_color actual
'
test_expect_success '%C(auto) enables colors for color.diff' '
test_expect_success '%C(auto,...) enables colors for color.diff' '
git -c color.diff=always log --format=$AUTO_COLOR -1 >actual &&
has_color actual
'
test_expect_success '%C(auto) enables colors for color.ui' '
test_expect_success '%C(auto,...) enables colors for color.ui' '
git -c color.ui=always log --format=$AUTO_COLOR -1 >actual &&
has_color actual
'
test_expect_success '%C(auto) respects --color' '
test_expect_success '%C(auto,...) respects --color' '
git log --format=$AUTO_COLOR -1 --color >actual &&
has_color actual
'
test_expect_success '%C(auto) respects --no-color' '
test_expect_success '%C(auto,...) respects --no-color' '
git -c color.ui=always log --format=$AUTO_COLOR -1 --no-color >actual &&
has_no_color actual
'
test_expect_success TTY '%C(auto) respects --color=auto (stdout is tty)' '
test_expect_success TTY '%C(auto,...) respects --color=auto (stdout is tty)' '
test_terminal env TERM=vt100 \
git log --format=$AUTO_COLOR -1 --color=auto >actual &&
has_color actual
'
test_expect_success '%C(auto) respects --color=auto (stdout not tty)' '
test_expect_success '%C(auto,...) respects --color=auto (stdout not tty)' '
(
TERM=vt100 && export TERM &&
git log --format=$AUTO_COLOR -1 --color=auto >actual &&
@ -223,6 +223,18 @@ test_expect_success '%C(auto) respects --color=auto (stdout not tty)' '
)
'
test_expect_success '%C(auto) respects --color' '
git log --color --format="%C(auto)%H" -1 >actual &&
printf "\\033[33m%s\\033[m\\n" $(git rev-parse HEAD) >expect &&
test_cmp expect actual
'
test_expect_success '%C(auto) respects --no-color' '
git log --no-color --format="%C(auto)%H" -1 >actual &&
git rev-parse HEAD >expect &&
test_cmp expect actual
'
iconv -f utf-8 -t $test_encoding > commit-msg <<EOF
Test printing of complex bodies