update-ref.c: extract a new function, parse_next_sha1()

diff --git a/builtin/tag.c b/builtin/tag.c
index 169c676636ff6b320f32f13126a5ff46b222f879..40356e3e41b44f87b565ebbed8ad0f7a5000b31d 100644 (file)
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -27,9 +27,16 @@ static const char * const git_tag_usage[] = {
        NULL
 };
 
+#define STRCMP_SORT     0      /* must be zero */
+#define VERCMP_SORT     1
+#define SORT_MASK       0x7fff
+#define REVERSE_SORT    0x8000
+
 struct tag_filter {
        const char **patterns;
        int lines;
+       int sort;
+       struct string_list tags;
        struct commit_list *with_commit;
 };
 
@@ -166,7 +173,10 @@ static int show_reference(const char *refname, const unsigned char *sha1,
                        return 0;
 
                if (!filter->lines) {
-                       printf("%s\n", refname);
+                       if (filter->sort)
+                               string_list_append(&filter->tags, refname);
+                       else
+                               printf("%s\n", refname);
                        return 0;
                }
                printf("%-15s ", refname);
@@ -177,17 +187,39 @@ static int show_reference(const char *refname, const unsigned char *sha1,
        return 0;
 }
 
+static int sort_by_version(const void *a_, const void *b_)
+{
+       const struct string_list_item *a = a_;
+       const struct string_list_item *b = b_;
+       return versioncmp(a->string, b->string);
+}
+
 static int list_tags(const char **patterns, int lines,
-                       struct commit_list *with_commit)
+                    struct commit_list *with_commit, int sort)
 {
        struct tag_filter filter;
 
        filter.patterns = patterns;
        filter.lines = lines;
+       filter.sort = sort;
        filter.with_commit = with_commit;
+       memset(&filter.tags, 0, sizeof(filter.tags));
+       filter.tags.strdup_strings = 1;
 
        for_each_tag_ref(show_reference, (void *) &filter);
-
+       if (sort) {
+               int i;
+               if ((sort & SORT_MASK) == VERCMP_SORT)
+                       qsort(filter.tags.items, filter.tags.nr,
+                             sizeof(struct string_list_item), sort_by_version);
+               if (sort & REVERSE_SORT)
+                       for (i = filter.tags.nr - 1; i >= 0; i--)
+                               printf("%s\n", filter.tags.items[i].string);
+               else
+                       for (i = 0; i < filter.tags.nr; i++)
+                               printf("%s\n", filter.tags.items[i].string);
+               string_list_clear(&filter.tags, 0);
+       }
        return 0;
 }
 
@@ -427,6 +459,29 @@ static int parse_opt_points_at(const struct option *opt __attribute__((unused)),
        return 0;
 }
 
+static int parse_opt_sort(const struct option *opt, const char *arg, int unset)
+{
+       int *sort = opt->value;
+       int flags = 0;
+
+       if (*arg == '-') {
+               flags |= REVERSE_SORT;
+               arg++;
+       }
+       if (starts_with(arg, "version:")) {
+               *sort = VERCMP_SORT;
+               arg += 8;
+       } else if (starts_with(arg, "v:")) {
+               *sort = VERCMP_SORT;
+               arg += 2;
+       } else
+               *sort = STRCMP_SORT;
+       if (strcmp(arg, "refname"))
+               die(_("unsupported sort specification %s"), arg);
+       *sort |= flags;
+       return 0;
+}
+
 int cmd_tag(int argc, const char **argv, const char *prefix)
 {
        struct strbuf buf = STRBUF_INIT;
@@ -437,7 +492,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        struct create_tag_options opt;
        char *cleanup_arg = NULL;
        int annotate = 0, force = 0, lines = -1;
-       int cmdmode = 0;
+       int cmdmode = 0, sort = 0;
        const char *msgfile = NULL, *keyid = NULL;
        struct msg_arg msg = { 0, STRBUF_INIT };
        struct commit_list *with_commit = NULL;
@@ -462,6 +517,10 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                                        N_("use another key to sign the tag")),
                OPT__FORCE(&force, N_("replace the tag if exists")),
                OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
+               {
+                       OPTION_CALLBACK, 0, "sort", &sort, N_("type"), N_("sort tags"),
+                       PARSE_OPT_NONEG, parse_opt_sort
+               },
 
                OPT_GROUP(N_("Tag listing options")),
                {
@@ -470,6 +529,12 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                        PARSE_OPT_LASTARG_DEFAULT,
                        parse_opt_with_commit, (intptr_t)"HEAD",
                },
+               {
+                       OPTION_CALLBACK, 0, "with", &with_commit, N_("commit"),
+                       N_("print only tags that contain the commit"),
+                       PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
+                       parse_opt_with_commit, (intptr_t)"HEAD",
+               },
                {
                        OPTION_CALLBACK, 0, "points-at", NULL, N_("object"),
                        N_("print only tags of the object"), 0, parse_opt_points_at
@@ -509,7 +574,9 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                        copts.padding = 2;
                        run_column_filter(colopts, &copts);
                }
-               ret = list_tags(argv, lines == -1 ? 0 : lines, with_commit);
+               if (lines != -1 && sort)
+                       die(_("--sort and -n are incompatible"));
+               ret = list_tags(argv, lines == -1 ? 0 : lines, with_commit, sort);
                if (column_active(colopts))
                        stop_column_filter();
                return ret;