ref-filter: introduce refname_atom_parser_internal()

Since there are multiple atoms which print refs ('%(refname)',
'%(symref)', '%(push)', '%(upstream)'), it makes sense to have a common
ground for parsing them. This would allow us to share implementations of
the atom modifiers between these atoms.

Introduce refname_atom_parser_internal() to act as a common parsing
function for ref printing atoms. This would eventually be used to
introduce refname_atom_parser() and symref_atom_parser() and also be
internally used in remote_ref_atom_parser().

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Karthik Nayak <Karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ref-filter.c b/ref-filter.c
index 26116b805eab45b39b6b6f46d720bc61ffea94c1..7ff284cdf17c8562f627df9700c34153ac48192f 100644 (file)
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -32,6 +32,11 @@ struct if_then_else {
                condition_satisfied : 1;
 };
 
+struct refname_atom {
+       enum { R_NORMAL, R_SHORT, R_STRIP } option;
+       unsigned int strip;
+};
+
 /*
  * An atom is a valid field atom listed below, possibly prefixed with
  * a "*" to denote deref_tag().
@@ -64,6 +69,7 @@ static struct used_atom {
                        enum { O_FULL, O_LENGTH, O_SHORT } option;
                        unsigned int length;
                } objectname;
+               struct refname_atom refname;
        } u;
 } *used_atom;
 static int used_atom_cnt, need_tagged, need_symref;
@@ -77,6 +83,21 @@ static void color_atom_parser(struct used_atom *atom, const char *color_value)
                die(_("unrecognized color: %%(color:%s)"), color_value);
 }
 
+static void refname_atom_parser_internal(struct refname_atom *atom,
+                                        const char *arg, const char *name)
+{
+       if (!arg)
+               atom->option = R_NORMAL;
+       else if (!strcmp(arg, "short"))
+               atom->option = R_SHORT;
+       else if (skip_prefix(arg, "strip=", &arg)) {
+               atom->option = R_STRIP;
+               if (strtoul_ui(arg, 10, &atom->strip) || atom->strip <= 0)
+                       die(_("positive value expected refname:strip=%s"), arg);
+       } else
+               die(_("unrecognized %%(%s) argument: %s"), name, arg);
+}
+
 static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
 {
        struct string_list params = STRING_LIST_INIT_DUP;