parse-options: add new function "usage_msg_opt"

diff --git a/builtin-rerere.c b/builtin-rerere.c
index d4dec6b7156b081bf63933d4de6d0b62ab2212c8..adfb7b5f48597c19c23235b74cf1a0c779985dc6 100644 (file)
--- a/builtin-rerere.c
+++ b/builtin-rerere.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "dir.h"
 #include "string-list.h"
 #include "rerere.h"
 #include "xdiff/xdiff.h"
@@ -12,28 +13,17 @@ static const char git_rerere_usage[] =
 static int cutoff_noresolve = 15;
 static int cutoff_resolve = 60;
 
-static const char *rr_path(const char *name, const char *file)
-{
-       return git_path("rr-cache/%s/%s", name, file);
-}
-
 static time_t rerere_created_at(const char *name)
 {
        struct stat st;
-       return stat(rr_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
-}
-
-static int has_resolution(const char *name)
-{
-       struct stat st;
-       return !stat(rr_path(name, "postimage"), &st);
+       return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
 }
 
 static void unlink_rr_item(const char *name)
 {
-       unlink(rr_path(name, "thisimage"));
-       unlink(rr_path(name, "preimage"));
-       unlink(rr_path(name, "postimage"));
+       unlink(rerere_path(name, "thisimage"));
+       unlink(rerere_path(name, "preimage"));
+       unlink(rerere_path(name, "postimage"));
        rmdir(git_path("rr-cache/%s", name));
 }
 
@@ -59,17 +49,15 @@ static void garbage_collect(struct string_list *rr)
        git_config(git_rerere_gc_config, NULL);
        dir = opendir(git_path("rr-cache"));
        while ((e = readdir(dir))) {
-               const char *name = e->d_name;
-               if (name[0] == '.' &&
-                   (name[1] == '\0' || (name[1] == '.' && name[2] == '\0')))
+               if (is_dot_or_dotdot(e->d_name))
                        continue;
-               then = rerere_created_at(name);
+               then = rerere_created_at(e->d_name);
                if (!then)
                        continue;
-               cutoff = (has_resolution(name)
+               cutoff = (has_rerere_resolution(e->d_name)
                          ? cutoff_resolve : cutoff_noresolve);
                if (then < now - cutoff * 86400)
-                       string_list_append(name, &to_remove);
+                       string_list_append(e->d_name, &to_remove);
        }
        for (i = 0; i < to_remove.nr; i++)
                unlink_rr_item(to_remove.items[i].string);
@@ -125,10 +113,10 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
        if (!strcmp(argv[1], "clear")) {
                for (i = 0; i < merge_rr.nr; i++) {
                        const char *name = (const char *)merge_rr.items[i].util;
-                       if (!has_resolution(name))
+                       if (!has_rerere_resolution(name))
                                unlink_rr_item(name);
                }
-               unlink(git_path("rr-cache/MERGE_RR"));
+               unlink_or_warn(git_path("rr-cache/MERGE_RR"));
        } else if (!strcmp(argv[1], "gc"))
                garbage_collect(&merge_rr);
        else if (!strcmp(argv[1], "status"))
@@ -138,7 +126,7 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
                for (i = 0; i < merge_rr.nr; i++) {
                        const char *path = merge_rr.items[i].string;
                        const char *name = (const char *)merge_rr.items[i].util;
-                       diff_two(rr_path(name, "preimage"), path, path, path);
+                       diff_two(rerere_path(name, "preimage"), path, path, path);
                }
        else
                usage(git_rerere_usage);