ref-filter: introduce remote_ref_atom_parser()

Introduce remote_ref_atom_parser() which will parse the '%(upstream)'
and '%(push)' atoms and store information into the 'used_atom'
structure based on the modifiers used along with the corresponding
atom.

Helped-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Karthik Nayak <Karthik.188@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ref-filter.c b/ref-filter.c
index 2255dcc..7df5085 100644 (file)
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -37,6 +37,8 @@ static struct used_atom {
        union {
                char color[COLOR_MAXLEN];
                struct align align;
+               enum { RR_NORMAL, RR_SHORTEN, RR_TRACK, RR_TRACKSHORT }
+                       remote_ref;
        } u;
 } *used_atom;
 static int used_atom_cnt, need_tagged, need_symref;
@@ -50,6 +52,20 @@ static void color_atom_parser(struct used_atom *atom, const char *color_value)
                die(_("unrecognized color: %%(color:%s)"), color_value);
 }
 
+static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
+{
+       if (!arg)
+               atom->u.remote_ref = RR_NORMAL;
+       else if (!strcmp(arg, "short"))
+               atom->u.remote_ref = RR_SHORTEN;
+       else if (!strcmp(arg, "track"))
+               atom->u.remote_ref = RR_TRACK;
+       else if (!strcmp(arg, "trackshort"))
+               atom->u.remote_ref = RR_TRACKSHORT;
+       else
+               die(_("unrecognized format: %%(%s)"), atom->name);
+}
+
 static align_type parse_align_position(const char *s)
 {
        if (!strcmp(s, "right"))
@@ -132,8 +148,8 @@ static struct {
        { "subject" },
        { "body" },
        { "contents" },
-       { "upstream" },
-       { "push" },
+       { "upstream", FIELD_STR, remote_ref_atom_parser },
+       { "push", FIELD_STR, remote_ref_atom_parser },
        { "symref" },
        { "flag" },
        { "HEAD" },
@@ -840,6 +856,43 @@ static const char *strip_ref_components(const char *refname, const char *nr_arg)
        return start;
 }
 
+static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
+                                   struct branch *branch, const char **s)
+{
+       int num_ours, num_theirs;
+       if (atom->u.remote_ref == RR_SHORTEN)
+               *s = shorten_unambiguous_ref(refname, warn_ambiguous_refs);
+       else if (atom->u.remote_ref == RR_TRACK) {
+               if (stat_tracking_info(branch, &num_ours,
+                                      &num_theirs, NULL))
+                       return;
+
+               if (!num_ours && !num_theirs)
+                       *s = "";
+               else if (!num_ours)
+                       *s = xstrfmt("[behind %d]", num_theirs);
+               else if (!num_theirs)
+                       *s = xstrfmt("[ahead %d]", num_ours);
+               else
+                       *s = xstrfmt("[ahead %d, behind %d]",
+                                    num_ours, num_theirs);
+       } else if (atom->u.remote_ref == RR_TRACKSHORT) {
+               if (stat_tracking_info(branch, &num_ours,
+                                      &num_theirs, NULL))
+                       return;
+
+               if (!num_ours && !num_theirs)
+                       *s = "=";
+               else if (!num_ours)
+                       *s = "<";
+               else if (!num_theirs)
+                       *s = ">";
+               else
+                       *s = "<>";
+       } else /* RR_NORMAL */
+               *s = refname;
+}
+
 /*
  * Parse the object referred by ref, and grab needed value.
  */
@@ -891,8 +944,9 @@ static void populate_value(struct ref_array_item *ref)
                        branch = branch_get(branch_name);
 
                        refname = branch_get_upstream(branch, NULL);
-                       if (!refname)
-                               continue;
+                       if (refname)
+                               fill_remote_ref_details(atom, refname, branch, &v->s);
+                       continue;
                } else if (starts_with(name, "push")) {
                        const char *branch_name;
                        if (!skip_prefix(ref->refname, "refs/heads/",
@@ -903,6 +957,8 @@ static void populate_value(struct ref_array_item *ref)
                        refname = branch_get_push(branch, NULL);
                        if (!refname)
                                continue;
+                       fill_remote_ref_details(atom, refname, branch, &v->s);
+                       continue;
                } else if (starts_with(name, "color:")) {
                        v->s = atom->u.color;
                        continue;
@@ -944,7 +1000,6 @@ static void populate_value(struct ref_array_item *ref)
 
                formatp = strchr(name, ':');
                if (formatp) {
-                       int num_ours, num_theirs;
                        const char *arg;
 
                        formatp++;
@@ -953,43 +1008,7 @@ static void populate_value(struct ref_array_item *ref)
                                                      warn_ambiguous_refs);
                        else if (skip_prefix(formatp, "strip=", &arg))
                                refname = strip_ref_components(refname, arg);
-                       else if (!strcmp(formatp, "track") &&
-                                (starts_with(name, "upstream") ||
-                                 starts_with(name, "push"))) {
-
-                               if (stat_tracking_info(branch, &num_ours,
-                                                      &num_theirs, NULL))
-                                       continue;
-
-                               if (!num_ours && !num_theirs)
-                                       v->s = "";
-                               else if (!num_ours)
-                                       v->s = xstrfmt("[behind %d]", num_theirs);
-                               else if (!num_theirs)
-                                       v->s = xstrfmt("[ahead %d]", num_ours);
-                               else
-                                       v->s = xstrfmt("[ahead %d, behind %d]",
-                                                      num_ours, num_theirs);
-                               continue;
-                       } else if (!strcmp(formatp, "trackshort") &&
-                                  (starts_with(name, "upstream") ||
-                                   starts_with(name, "push"))) {
-                               assert(branch);
-
-                               if (stat_tracking_info(branch, &num_ours,
-                                                       &num_theirs, NULL))
-                                       continue;
-
-                               if (!num_ours && !num_theirs)
-                                       v->s = "=";
-                               else if (!num_ours)
-                                       v->s = "<";
-                               else if (!num_theirs)
-                                       v->s = ">";
-                               else
-                                       v->s = "<>";
-                               continue;
-                       } else
+                       else
                                die("unknown %.*s format %s",
                                    (int)(formatp - name), name, formatp);
                }