cat-file doc: document that -e will return some output

[git-core/git.git] / ref-filter.c

diff --git a/ref-filter.c b/ref-filter.c
index f3e53d4..e728b15 100644 (file)
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -82,6 +82,7 @@ static struct used_atom {
                } remote_ref;
                struct {
                        enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB, C_TRAILERS } option;
+                       struct process_trailer_options trailer_opts;
                        unsigned int nlines;
                } contents;
                struct {
@@ -182,9 +183,23 @@ static void subject_atom_parser(const struct ref_format *format, struct used_ato
 
 static void trailers_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *arg)
 {
-       if (arg)
-               die(_("%%(trailers) does not take arguments"));
+       struct string_list params = STRING_LIST_INIT_DUP;
+       int i;
+
+       if (arg) {
+               string_list_split(&params, arg, ',', -1);
+               for (i = 0; i < params.nr; i++) {
+                       const char *s = params.items[i].string;
+                       if (!strcmp(s, "unfold"))
+                               atom->u.contents.trailer_opts.unfold = 1;
+                       else if (!strcmp(s, "only"))
+                               atom->u.contents.trailer_opts.only_trailers = 1;
+                       else
+                               die(_("unknown %%(trailers) argument: %s"), s);
+               }
+       }
        atom->u.contents.option = C_TRAILERS;
+       string_list_clear(&params, 0);
 }
 
 static void contents_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *arg)
@@ -197,9 +212,10 @@ static void contents_atom_parser(const struct ref_format *format, struct used_at
                atom->u.contents.option = C_SIG;
        else if (!strcmp(arg, "subject"))
                atom->u.contents.option = C_SUB;
-       else if (!strcmp(arg, "trailers"))
-               atom->u.contents.option = C_TRAILERS;
-       else if (skip_prefix(arg, "lines=", &arg)) {
+       else if (skip_prefix(arg, "trailers", &arg)) {
+               skip_prefix(arg, ":", &arg);
+               trailers_atom_parser(format, atom, *arg ? arg : NULL);
+       } else if (skip_prefix(arg, "lines=", &arg)) {
                atom->u.contents.option = C_LINES;
                if (strtoul_ui(arg, 10, &atom->u.contents.nlines))
                        die(_("positive value expected contents:lines=%s"), arg);
@@ -295,9 +311,7 @@ static void if_atom_parser(const struct ref_format *format, struct used_atom *at
 
 static void head_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *arg)
 {
-       struct object_id unused;
-
-       atom->u.head = resolve_refdup("HEAD", RESOLVE_REF_READING, unused.hash, NULL);
+       atom->u.head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 }
 
 static struct {
@@ -1050,7 +1064,7 @@ static void grab_sub_body_contents(struct atom_value *val, int deref, struct obj
                        name++;
                if (strcmp(name, "subject") &&
                    strcmp(name, "body") &&
-                   strcmp(name, "trailers") &&
+                   !starts_with(name, "trailers") &&
                    !starts_with(name, "contents"))
                        continue;
                if (!subpos)
@@ -1075,13 +1089,12 @@ static void grab_sub_body_contents(struct atom_value *val, int deref, struct obj
                        append_lines(&s, subpos, contents_end - subpos, atom->u.contents.nlines);
                        v->s = strbuf_detach(&s, NULL);
                } else if (atom->u.contents.option == C_TRAILERS) {
-                       struct trailer_info info;
+                       struct strbuf s = STRBUF_INIT;
+
+                       /* Format the trailer info according to the trailer_opts given */
+                       format_trailers_from_commit(&s, subpos, &atom->u.contents.trailer_opts);
 
-                       /* Search for trailer info */
-                       trailer_info_get(&info, subpos);
-                       v->s = xmemdupz(info.trailer_start,
-                                       info.trailer_end - info.trailer_start);
-                       trailer_info_release(&info);
+                       v->s = strbuf_detach(&s, NULL);
                } else if (atom->u.contents.option == C_BARE)
                        v->s = xstrdup(subpos);
        }
@@ -1325,9 +1338,8 @@ static void populate_value(struct ref_array_item *ref)
        ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
 
        if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
-               struct object_id unused1;
                ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
-                                            unused1.hash, NULL);
+                                            NULL, NULL);
                if (!ref->symref)
                        ref->symref = "";
        }