Re: [PATCH v4 3/3] config: add '--show-origin' option to print the origin of a config value

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

On 16/02/16 17:38, Jeff King wrote:
> On Tue, Feb 16, 2016 at 04:46:07PM +0000, Ramsay Jones wrote:
> 
>>> OK, I am happy to add the extra code. 
>>
>> Unless I've missed something (quite possible), this patch does not
>> need to change. (you have (both) convinced me that your current
>> solution is the best).
>>
>> The only change that I would suggest is the one-liner I already
>> suggested to the previous patch (plus the one-liner in the test,
>> of course. err ... so the two-liner!). Having said that, I didn't
>> try it out - I was just typing into my email client, so ...
> 
> I think it's more than that one-liner. This patch shows "type:name"
> verbatim from what is passed into do_config_from_file, as does the error
> message. If they are going to have different output formats (e.g.,
> "<stdin>" versus "stdin"), there needs to be logic transforming them in
> at least one of the spots.

Ugh, yes you are right.

Hmm, I just hacked something up (see below) and, since its a bit
ugly, I'm now in two minds! (it could be improved, of course). ;-)

So, I'll leave it to yourself and Lars to decide.

ATB,
Ramsay Jones

-- >8 --
From: Ramsay Jones <ramsay@ramsayjones.plus.com>
Date: Tue, 16 Feb 2016 21:39:47 +0000
Subject: [PATCH] config: fixup '<stdin>' error messages

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
---
 config.c               | 22 ++++++++++++++++++----
 t/t1300-repo-config.sh |  2 +-
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/config.c b/config.c
index 0a35323..adc808c 100644
--- a/config.c
+++ b/config.c
@@ -417,6 +417,8 @@ static int git_parse_source(config_fn_t fn, void *data)
 	int comment = 0;
 	int baselen = 0;
 	struct strbuf *var = &cf->var;
+	const char *cftype = cf->type;
+	const char *cfname = cf->name;
 
 	/* U+FEFF Byte Order Mark in UTF8 */
 	const char *bomptr = utf8_bom;
@@ -471,10 +473,14 @@ static int git_parse_source(config_fn_t fn, void *data)
 		if (get_value(fn, data, var) < 0)
 			break;
 	}
+	if (!strcmp(cftype, "stdin")) {
+		cftype = "file";
+		cfname = "<stdin>";
+	}
 	if (cf->die_on_error)
-		die(_("bad config line %d in %s %s"), cf->linenr, cf->type, cf->name);
+		die(_("bad config line %d in %s %s"), cf->linenr, cftype, cfname);
 	else
-		return error(_("bad config line %d in %s %s"), cf->linenr, cf->type, cf->name);
+		return error(_("bad config line %d in %s %s"), cf->linenr, cftype, cfname);
 }
 
 static int parse_unit_factor(const char *end, uintmax_t *val)
@@ -589,9 +595,17 @@ static void die_bad_number(const char *name, const char *value)
 	if (!value)
 		value = "";
 
-	if (cf && cf->type && cf->name)
+	if (cf && cf->type && cf->name) {
+		const char *cftype = cf->type;
+		const char *cfname = cf->name;
+
+		if (!strcmp(cftype, "stdin")) {
+			cftype = "file";
+			cfname = "<stdin>";
+		}
 		die(_("bad numeric config value '%s' for '%s' in %s %s: %s"),
-		    value, name, cf->type, cf->name, reason);
+		    value, name, cftype, cfname, reason);
+	}
 	die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
 }
 
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 4abbdf9..4497688 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -707,7 +707,7 @@ test_expect_success 'invalid unit' '
 '
 
 test_expect_success 'invalid stdin config' '
-	echo "fatal: bad config line 1 in stdin " >expect &&
+	echo "fatal: bad config line 1 in file <stdin>" >expect &&
 	echo "[broken" | test_must_fail git config --list --file - >output 2>&1 &&
 	test_cmp expect output
 '
-- 
2.7.0