[PATCH v6 30/32] count-objects: report unused files in $GIT_DIR/repos/...

[Nguyễn Thái Ngọc Duy]

In linked checkouts, borrowed parts like config is taken from
$GIT_COMMON_DIR. $GIT_DIR/config is never used. Report them as
garbage.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 builtin/count-objects.c |  4 +++-
 cache.h                 |  1 +
 path.c                  | 29 +++++++++++++++++++++++++++--
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/builtin/count-objects.c b/builtin/count-objects.c
index a7f70cb..d3a1620 100644
--- a/builtin/count-objects.c
+++ b/builtin/count-objects.c
@@ -102,8 +102,10 @@ int cmd_count_objects(int argc, const char **argv, const 
char *prefix)
        /* we do not take arguments other than flags for now */
        if (argc)
                usage_with_options(count_objects_usage, opts);
-       if (verbose)
+       if (verbose) {
                report_garbage = real_report_garbage;
+               report_linked_checkout_garbage();
+       }
        memcpy(path, objdir, len);
        if (len && objdir[len-1] != '/')
                path[len++] = '/';
diff --git a/cache.h b/cache.h
index b363c00..39cf3f0 100644
--- a/cache.h
+++ b/cache.h
@@ -690,6 +690,7 @@ extern const char *mkpath(const char *fmt, ...) 
__attribute__((format (printf, 1
 extern const char *git_path(const char *fmt, ...) __attribute__((format 
(printf, 1, 2)));
 extern const char *git_path_submodule(const char *path, const char *fmt, ...)
        __attribute__((format (printf, 2, 3)));
+extern void report_linked_checkout_garbage(void);
 
 /*
  * Return the name of the file in the local object database that would
diff --git a/path.c b/path.c
index e41d6b3..b5af137 100644
--- a/path.c
+++ b/path.c
@@ -4,6 +4,7 @@
 #include "cache.h"
 #include "strbuf.h"
 #include "string-list.h"
+#include "dir.h"
 
 static int get_st_mode_bits(const char *path, int *mode)
 {
@@ -91,9 +92,9 @@ static void replace_dir(struct strbuf *buf, int len, const 
char *newdir)
 }
 
 static const char *common_list[] = {
-       "/branches", "/hooks", "/info", "/logs", "/lost-found", "/modules",
+       "/branches", "/hooks", "/info", "!/logs", "/lost-found", "/modules",
        "/objects", "/refs", "/remotes", "/repos", "/rr-cache", "/svn",
-       "config", "gc.pid", "packed-refs", "shallow",
+       "config", "!gc.pid", "packed-refs", "shallow",
        NULL
 };
 
@@ -107,6 +108,8 @@ static void update_common_dir(struct strbuf *buf, int 
git_dir_len)
        for (p = common_list; *p; p++) {
                const char *path = *p;
                int is_dir = 0;
+               if (*path == '!')
+                       path++;
                if (*path == '/') {
                        path++;
                        is_dir = 1;
@@ -122,6 +125,28 @@ static void update_common_dir(struct strbuf *buf, int 
git_dir_len)
        }
 }
 
+void report_linked_checkout_garbage(void)
+{
+       struct strbuf sb = STRBUF_INIT;
+       const char **p;
+       int len;
+
+       if (!git_common_dir_env)
+               return;
+       strbuf_addf(&sb, "%s/", get_git_dir());
+       len = sb.len;
+       for (p = common_list; *p; p++) {
+               const char *path = *p;
+               if (*path == '!')
+                       continue;
+               strbuf_setlen(&sb, len);
+               strbuf_addstr(&sb, path);
+               if (file_exists(sb.buf))
+                       report_garbage("unused in linked checkout", sb.buf);
+       }
+       strbuf_release(&sb);
+}
+
 static void adjust_git_path(struct strbuf *buf, int git_dir_len)
 {
        const char *base = buf->buf + git_dir_len;
-- 
1.9.1.346.ga2b5940

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