Re: [PATCH v9 1/1] http: Add Accept-Language header if possible

[Junio C Hamano <gitster@pobox.com>]

Jeff King <peff@peff.net> writes:

> On Thu, Feb 26, 2015 at 12:59:56PM -0800, Junio C Hamano wrote:
>
>> Jeff King <peff@peff.net> writes:
>> 
>> > Perhaps it would be less risky to stick get_preferred_languages() into
>> > gettext.c, like the patch below. Then we do not have to worry about
>> > locale.h introducing other disruptive includes. The function is not
>> > technically about gettext, but it seems reasonable to me to stuff all of
>> > the i18n code together.
>> 
>> Yeah, I like that a lot better.  Thanks.
>
> Are you just using it for inspiration, or did you want me to wrap it up
> with a commit message?

Here is what I queued.  Thanks.

-- >8 --
From: Jeff King <peff@peff.net>
Date: Wed, 25 Feb 2015 22:04:16 -0500
Subject: [PATCH] gettext.c: move get_preferred_languages() from http.c

Calling setlocale(LC_MESSAGES, ...) directly from http.c, without
including <locale.h>, was causing compilation warnings.  Move the
helper function to gettext.c that already includes the header and
where locale-related issues are handled.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 gettext.c | 25 +++++++++++++++++++++++++
 gettext.h |  2 ++
 http.c    |  1 +
 3 files changed, 28 insertions(+)

diff --git a/gettext.c b/gettext.c
index 8b2da46..7378ba2 100644
--- a/gettext.c
+++ b/gettext.c
@@ -18,6 +18,31 @@
 #	endif
 #endif
 
+/*
+ * Guess the user's preferred languages from the value in LANGUAGE environment
+ * variable and LC_MESSAGES locale category if NO_GETTEXT is not defined.
+ *
+ * The result can be a colon-separated list like "ko:ja:en".
+ */
+const char *get_preferred_languages(void)
+{
+	const char *retval;
+
+	retval = getenv("LANGUAGE");
+	if (retval && *retval)
+		return retval;
+
+#ifndef NO_GETTEXT
+	retval = setlocale(LC_MESSAGES, NULL);
+	if (retval && *retval &&
+		strcmp(retval, "C") &&
+		strcmp(retval, "POSIX"))
+		return retval;
+#endif
+
+	return NULL;
+}
+
 #ifdef GETTEXT_POISON
 int use_gettext_poison(void)
 {
diff --git a/gettext.h b/gettext.h
index 7671d09..e539482 100644
--- a/gettext.h
+++ b/gettext.h
@@ -65,4 +65,6 @@ const char *Q_(const char *msgid, const char *plu, unsigned long n)
 /* Mark msgid for translation but do not translate it. */
 #define N_(msgid) msgid
 
+const char *get_preferred_languages(void);
+
 #endif
diff --git a/http.c b/http.c
index 8b659b6..71ed418 100644
--- a/http.c
+++ b/http.c
@@ -8,6 +8,7 @@
 #include "credential.h"
 #include "version.h"
 #include "pkt-line.h"
+#include "gettext.h"
 
 int active_requests;
 int http_is_verbose;
-- 
2.3.1-280-g2531f2d