Back in prehistoric times, our decision on whether or not to
show color by default relied on using a config callback that
either did or didn't load color config like color.diff.
When we introduced color.ui, we put it in the same boat:
commands had to manually respect it by using git_color_config()
or its git_color_default_config() convenience wrapper.
But in 4c7f1819b (make color.ui default to 'auto',
2013-06-10), that changed. Since then, we default color.ui
to auto in all programs, meaning that even plumbing commands
like "git diff-tree --pretty" might colorize the output.
Nobody seems to have complained in the intervening years,
presumably because the "is stdout a tty" check does a good
job of catching the right cases.
But that leaves an interesting curiosity: color.ui defaults
to auto even in plumbing, but you can't actually _disable_
the color via config. So if you really hate color and set
"color.ui" to false, diff-tree will still show color (but
porcelain like git-diff won't). Nobody noticed that either,
probably because very few people disable color.
One could argue that the plumbing should _always_ disable
color unless an explicit --color option is given on the
command line. But in practice, this creates a lot of
complications for scripts which do want plumbing to show
user-visible output. They can't just pass "--color" blindly;
they need to check the user's config and decide what to
send.
Given that nobody has complained about the current behavior,
let's assume it's a good path, and follow it to its
conclusion: supporting color.ui everywhere.
Note that you can create havoc by setting color.ui=always in
your config, but that's more or less already the case. We
could disallow it entirely, but it is handy for one-offs
like:
git -c color.ui=always foo >not-a-tty
when "foo" does not take a --color option itself.
Signed-off-by: Jeff King <p...@peff.net>
---
builtin/branch.c | 2 +-
builtin/clean.c | 3 +--
builtin/grep.c | 2 +-
builtin/show-branch.c | 2 +-
color.c | 8 --------
config.c | 4 ++++
diff.c | 3 ---
7 files changed, 8 insertions(+), 16 deletions(-)
diff --git a/builtin/branch.c b/builtin/branch.c
index 036fdc929..d852ded49 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -92,7 +92,7 @@ static int git_branch_config(const char *var, const char
*value, void *cb)
return config_error_nonbool(var);
return color_parse(value, branch_colors[slot]);
}
- return git_color_default_config(var, value, cb);
+ return git_default_config(var, value, cb);
}
static const char *branch_get_color(enum color_branch ix)
diff --git a/builtin/clean.c b/builtin/clean.c
index 057fc97fe..c1bafda5b 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -125,8 +125,7 @@ static int git_clean_config(const char *var, const char
*value, void *cb)
return 0;
}
- /* inspect the color.ui config variable and others */
- return git_color_default_config(var, value, cb);
+ return git_default_config(var, value, cb);
}
static const char *clean_get_color(enum color_clean ix)
diff --git a/builtin/grep.c b/builtin/grep.c
index 0d6e66973..a7157f563 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -284,7 +284,7 @@ static int wait_all(void)
static int grep_cmd_config(const char *var, const char *value, void *cb)
{
int st = grep_config(var, value, cb);
- if (git_color_default_config(var, value, cb) < 0)
+ if (git_default_config(var, value, cb) < 0)
st = -1;
if (!strcmp(var, "grep.threads")) {
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 7073a3eb9..28f245c8c 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -554,7 +554,7 @@ static int git_show_branch_config(const char *var, const
char *value, void *cb)
return 0;
}
- return git_color_default_config(var, value, cb);
+ return git_default_config(var, value, cb);
}
static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
diff --git a/color.c b/color.c
index 31b6207a0..7aa8b076f 100644
--- a/color.c
+++ b/color.c
@@ -361,14 +361,6 @@ int git_color_config(const char *var, const char *value,
void *cb)
return 0;
}
-int git_color_default_config(const char *var, const char *value, void *cb)
-{
- if (git_color_config(var, value, cb) < 0)
- return -1;
-
- return git_default_config(var, value, cb);
-}
-
void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
{
if (*color)
diff --git a/config.c b/config.c
index a9356c138..bc290e756 100644
--- a/config.c
+++ b/config.c
@@ -16,6 +16,7 @@
#include "string-list.h"
#include "utf8.h"
#include "dir.h"
+#include "color.h"
struct config_source {
struct config_source *prev;
@@ -1350,6 +1351,9 @@ int git_default_config(const char *var, const char
*value, void *dummy)
if (starts_with(var, "advice."))
return git_default_advice_config(var, value);
+ if (git_color_config(var, value, dummy) < 0)
+ return -1;
+
if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
pager_use_color = git_config_bool(var,value);
return 0;
diff --git a/diff.c b/diff.c
index 85e714f6c..9c3825803 100644
--- a/diff.c
+++ b/diff.c
@@ -299,9 +299,6 @@ int git_diff_ui_config(const char *var, const char *value,
void *cb)
return 0;
}
- if (git_color_config(var, value, cb) < 0)
- return -1;
-
return git_diff_basic_config(var, value, cb);
}
--
2.13.2.1157.gc6daca446
