[PATCH v10 17/20] ref-filter: allow porcelain to translate messages in the output

[Karthik Nayak]

From: Karthik Nayak <karthik....@gmail.com>

Introduce setup_ref_filter_porcelain_msg() so that the messages used in
the atom %(upstream:track) can be translated if needed. By default, keep
the messages untranslated, which is the right behavior for plumbing
commands. This is needed as we port branch.c to use ref-filter's
printing API's.

Written-by: Matthieu Moy <matthieu....@grenoble-inp.fr>
Mentored-by: Christian Couder <christian.cou...@gmail.com>
Mentored-by: Matthieu Moy <matthieu....@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik....@gmail.com>
---
 ref-filter.c | 29 +++++++++++++++++++++++++----
 ref-filter.h |  2 ++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index dd7e751f2..e478ec6c8 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -16,6 +16,27 @@
 #include "trailer.h"
 #include "wt-status.h"
 
+static struct ref_msg {
+       const char *gone;
+       const char *ahead;
+       const char *behind;
+       const char *ahead_behind;
+} msgs = {
+        /* Untranslated plumbing messages: */
+       "gone",
+       "ahead %d",
+       "behind %d",
+       "ahead %d, behind %d"
+};
+
+void setup_ref_filter_porcelain_msg(void)
+{
+       msgs.gone = _("gone");
+       msgs.ahead = _("ahead %d");
+       msgs.behind = _("behind %d");
+       msgs.ahead_behind = _("ahead %d, behind %d");
+}
+
 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
 typedef enum { COMPARE_EQUAL, COMPARE_UNEQUAL, COMPARE_NONE } cmp_status;
 
@@ -1181,15 +1202,15 @@ static void fill_remote_ref_details(struct used_atom 
*atom, const char *refname,
        else if (atom->u.remote_ref.option == RR_TRACK) {
                if (stat_tracking_info(branch, &num_ours,
                                       &num_theirs, NULL)) {
-                       *s = xstrdup("gone");
+                       *s = xstrdup(msgs.gone);
                } else if (!num_ours && !num_theirs)
                        *s = "";
                else if (!num_ours)
-                       *s = xstrfmt("behind %d", num_theirs);
+                       *s = xstrfmt(msgs.behind, num_theirs);
                else if (!num_theirs)
-                       *s = xstrfmt("ahead %d", num_ours);
+                       *s = xstrfmt(msgs.ahead, num_ours);
                else
-                       *s = xstrfmt("ahead %d, behind %d",
+                       *s = xstrfmt(msgs.ahead_behind,
                                     num_ours, num_theirs);
                if (!atom->u.remote_ref.nobracket && *s[0]) {
                        const char *to_free = *s;
diff --git a/ref-filter.h b/ref-filter.h
index 630e7c2b9..44b36eded 100644
--- a/ref-filter.h
+++ b/ref-filter.h
@@ -113,5 +113,7 @@ struct ref_sorting *ref_default_sorting(void);
 int parse_opt_merge_filter(const struct option *opt, const char *arg, int 
unset);
 /*  Get the current HEAD's description */
 char *get_head_description(void);
+/*  Set up translated strings in the output. */
+void setup_ref_filter_porcelain_msg(void);
 
 #endif /*  REF_FILTER_H  */
-- 
2.11.0