On Tue, Oct 07, 2014 at 03:16:56PM -0400, Jeff King wrote:
> Actually, parse_decorate_color_config is slightly odd in that it takes
> the variable and the slot_name after this patch. That's because it
> passes the full variable name to color_parse, which does still die() on
> error. Perhaps it should be converted to return an error, too.
Actually, this doesn't let us get rid of the "var" in
parse_decorate_color_config, because it also wants to call
config_error_nonbool. However, while looking at this, I did notice that
some of the error messages generated by color_parse are a bit ugly, and
came up with the patch below (on top of what I just sent, but it could
be separate).
-- >8 --
Subject: color_parse: do not mention variable name in error message
Originally the color-parsing function was used only for
config variables. It made sense to pass the variable name so
that the die() message could be something like:
$ git -c color.branch.plain=bogus branch
fatal: bad color value 'bogus' for variable 'color.branch.plain'
These days we call it in other contexts, and the resulting
error messages are a little confusing:
$ git log --pretty='%C(bogus)'
fatal: bad color value 'bogus' for variable '--pretty format'
$ git config --get-color foo.bar bogus
fatal: bad color value 'bogus' for variable 'command line'
This patch teaches color_parse to complain only about the
value, and then return an error code. Config callers can
then propagate that up to the config parser, which mentions
the variable name. Other callers can provide a custom
message. After this patch these three cases now look like:
$ git -c color.branch.plain=bogus branch
error: invalid color value: bogus
fatal: unable to parse 'color.branch.plain' from command-line config
$ git log --pretty='%C(bogus)'
error: invalid color value: bogus
fatal: unable to parse --pretty format
$ git config --get-color foo.bar bogus
error: invalid color value: bogus
fatal: unable to parse default color value
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
I think the two-line errors are kind of ugly. It does match how
config_error_nonbool works, which also propagates its errors, and looks
like:
$ git -c color.branch.plain branch
error: Missing value for 'color.branch.plain'
fatal: unable to parse 'color.branch.plain' from command-line config
We could instead make color_parse silently return -1, and leave it up to
the caller to complain (and probably add die_bad_color_config() or
similar to avoid repetition in the config callers).
builtin/branch.c | 3 +--
builtin/clean.c | 3 +--
builtin/commit.c | 3 +--
builtin/config.c | 9 ++++++---
builtin/for-each-ref.c | 6 ++++--
color.c | 13 ++++++-------
color.h | 4 ++--
diff.c | 3 +--
grep.c | 2 +-
log-tree.c | 3 +--
pretty.c | 5 ++---
11 files changed, 26 insertions(+), 28 deletions(-)
diff --git a/builtin/branch.c b/builtin/branch.c
index 2c97141..35c786d 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -93,8 +93,7 @@ static int git_branch_config(const char *var, const char *value, void *cb)
return 0;
if (!value)
return config_error_nonbool(var);
- color_parse(value, var, branch_colors[slot]);
- return 0;
+ return color_parse(value, branch_colors[slot]);
}
return git_color_default_config(var, value, cb);
}
diff --git a/builtin/clean.c b/builtin/clean.c
index 3beeea6..a7e7b0b 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -116,8 +116,7 @@ static int git_clean_config(const char *var, const char *value, void *cb)
return 0;
if (!value)
return config_error_nonbool(var);
- color_parse(value, var, clean_colors[slot]);
- return 0;
+ return color_parse(value, clean_colors[slot]);
}
if (!strcmp(var, "clean.requireforce")) {
diff --git a/builtin/commit.c b/builtin/commit.c
index c45613a..407566d 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1328,8 +1328,7 @@ static int git_status_config(const char *k, const char *v, void *cb)
return 0;
if (!v)
return config_error_nonbool(k);
- color_parse(v, k, s->color_palette[slot]);
- return 0;
+ return color_parse(v, s->color_palette[slot]);
}
if (!strcmp(k, "status.relativepaths")) {
s->relative_paths = git_config_bool(k, v);
diff --git a/builtin/config.c b/builtin/config.c
index 37305e9..8cc2604 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -296,7 +296,8 @@ static int git_get_color_config(const char *var, const char *value, void *cb)
if (!strcmp(var, get_color_slot)) {
if (!value)
config_error_nonbool(var);
- color_parse(value, var, parsed_color);
+ if (color_parse(value, parsed_color) < 0)
+ return -1;
get_color_found = 1;
}
return 0;
@@ -309,8 +310,10 @@ static void get_color(const char *def_color)
git_config_with_options(git_get_color_config, NULL,
&given_config_source, respect_includes);
- if (!get_color_found && def_color)
- color_parse(def_color, "command line", parsed_color);
+ if (!get_color_found && def_color) {
+ if (color_parse(def_color, parsed_color) < 0)
+ die(_("unable to parse default color value"));
+ }
fputs(parsed_color, stdout);
}
diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index fda0f04..7ee86b3 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -671,7 +671,8 @@ static void populate_value(struct refinfo *ref)
} else if (starts_with(name, "color:")) {
char color[COLOR_MAXLEN] = "";
- color_parse(name + 6, "--format", color);
+ if (color_parse(name + 6, color) < 0)
+ die(_("unable to parse format"));
v->s = xstrdup(color);
continue;
} else if (!strcmp(name, "flag")) {
@@ -1004,7 +1005,8 @@ static void show_ref(struct refinfo *info, const char *format, int quote_style)
struct atom_value resetv;
char color[COLOR_MAXLEN] = "";
- color_parse("reset", "--format", color);
+ if (color_parse("reset", color) < 0)
+ die("BUG: couldn't parse 'reset' as a color");
resetv.s = color;
print_value(&resetv, quote_style);
}
diff --git a/color.c b/color.c
index f672885..7941e93 100644
--- a/color.c
+++ b/color.c
@@ -60,13 +60,12 @@ static int parse_attr(const char *name, int len)
return -1;
}
-void color_parse(const char *value, const char *var, char *dst)
+int color_parse(const char *value, char *dst)
{
- color_parse_mem(value, strlen(value), var, dst);
+ return color_parse_mem(value, strlen(value), dst);
}
-void color_parse_mem(const char *value, int value_len, const char *var,
- char *dst)
+int color_parse_mem(const char *value, int value_len, char *dst)
{
const char *ptr = value;
int len = value_len;
@@ -76,7 +75,7 @@ void color_parse_mem(const char *value, int value_len, const char *var,
if (!strncasecmp(value, "reset", len)) {
strcpy(dst, GIT_COLOR_RESET);
- return;
+ return 0;
}
/* [fg [bg]] [attr]... */
@@ -153,9 +152,9 @@ void color_parse_mem(const char *value, int value_len, const char *var,
*dst++ = 'm';
}
*dst = 0;
- return;
+ return 0;
bad:
- die("bad color value '%.*s' for variable '%s'", value_len, value, var);
+ return error(_("invalid color value: %.*s"), value_len, value);
}
int git_config_colorbool(const char *var, const char *value)
diff --git a/color.h b/color.h
index 9a8495b..f5beab1 100644
--- a/color.h
+++ b/color.h
@@ -77,8 +77,8 @@ int git_color_default_config(const char *var, const char *value, void *cb);
int git_config_colorbool(const char *var, const char *value);
int want_color(int var);
-void color_parse(const char *value, const char *var, char *dst);
-void color_parse_mem(const char *value, int len, const char *var, char *dst);
+int color_parse(const char *value, char *dst);
+int color_parse_mem(const char *value, int len, char *dst);
__attribute__((format (printf, 3, 4)))
int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
__attribute__((format (printf, 3, 4)))
diff --git a/diff.c b/diff.c
index d7a5c81..d1bd534 100644
--- a/diff.c
+++ b/diff.c
@@ -248,8 +248,7 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
return 0;
if (!value)
return config_error_nonbool(var);
- color_parse(value, var, diff_colors[slot]);
- return 0;
+ return color_parse(value, diff_colors[slot]);
}
/* like GNU diff's --suppress-blank-empty option */
diff --git a/grep.c b/grep.c
index 99217dc..4dc31ea 100644
--- a/grep.c
+++ b/grep.c
@@ -111,7 +111,7 @@ int grep_config(const char *var, const char *value, void *cb)
if (color) {
if (!value)
return config_error_nonbool(var);
- color_parse(value, var, color);
+ return color_parse(value, color);
}
return 0;
}
diff --git a/log-tree.c b/log-tree.c
index 877d976..7844f33 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -63,8 +63,7 @@ int parse_decorate_color_config(const char *var, const char *slot_name, const ch
return 0;
if (!value)
return config_error_nonbool(var);
- color_parse(value, var, decoration_colors[slot]);
- return 0;
+ return color_parse(value, decoration_colors[slot]);
}
/*
diff --git a/pretty.c b/pretty.c
index 31f2ede..59de1dc 100644
--- a/pretty.c
+++ b/pretty.c
@@ -963,9 +963,8 @@ static size_t parse_color(struct strbuf *sb, /* in UTF-8 */
return end - placeholder + 1;
begin += 5;
}
- color_parse_mem(begin,
- end - begin,
- "--pretty format", color);
+ if (color_parse_mem(begin, end - begin, color) < 0)
+ die(_("unable to parse --pretty format"));
strbuf_addstr(sb, color);
return end - placeholder + 1;
}
--
2.1.1.566.gdb1f904
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