Introduce remove_dir_recursively()

There was a function called remove_empty_dir_recursive() buried
in refs.c.  Expose a slightly enhanced version in dir.h: it can now
optionally remove a non-empty directory.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/dir.c b/dir.c
index eb6c3abd30baefb9501c69b0e956ae1231f4b085..b18257e65ffaf440eb0944c42624e19052178374 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -685,3 +685,44 @@ int is_inside_dir(const char *dir)
        char buffer[PATH_MAX];
        return get_relative_cwd(buffer, sizeof(buffer), dir) != NULL;
 }
+
+int remove_dir_recursively(struct strbuf *path, int only_empty)
+{
+       DIR *dir = opendir(path->buf);
+       struct dirent *e;
+       int ret = 0, original_len = path->len, len;
+
+       if (!dir)
+               return -1;
+       if (path->buf[original_len - 1] != '/')
+               strbuf_addch(path, '/');
+
+       len = path->len;
+       while ((e = readdir(dir)) != NULL) {
+               struct stat st;
+               if ((e->d_name[0] == '.') &&
+                   ((e->d_name[1] == 0) ||
+                    ((e->d_name[1] == '.') && e->d_name[2] == 0)))
+                       continue; /* "." and ".." */
+
+               strbuf_setlen(path, len);
+               strbuf_addstr(path, e->d_name);
+               if (lstat(path->buf, &st))
+                       ; /* fall thru */
+               else if (S_ISDIR(st.st_mode)) {
+                       if (!remove_dir_recursively(path, only_empty))
+                               continue; /* happy */
+               } else if (!only_empty && !unlink(path->buf))
+                       continue; /* happy, too */
+
+               /* path too long, stat fails, or non-directory still exists */
+               ret = -1;
+               break;
+       }
+       closedir(dir);
+
+       strbuf_setlen(path, original_len);
+       if (!ret)
+               ret = rmdir(path->buf);
+       return ret;
+}

diff --git a/dir.h b/dir.h
index f55a87b2cd5f2b4e06e14b4c1b832fc0a60ad319..a248a23ac4eab2aff1e91060f0e9281a8842bf6b 100644 (file)
--- a/dir.h
+++ b/dir.h
@@ -64,4 +64,6 @@ extern struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathna
 extern char *get_relative_cwd(char *buffer, int size, const char *dir);
 extern int is_inside_dir(const char *dir);
 
+extern int remove_dir_recursively(struct strbuf *path, int only_empty);
+
 #endif

diff --git a/refs.c b/refs.c
index 7fb3350789a407e36dc74418b79508e9bf916594..0dc5678079b6e6d40a06f48d14a9f73465cb9243 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -2,6 +2,7 @@
 #include "refs.h"
 #include "object.h"
 #include "tag.h"
+#include "dir.h"
 
 /* ISSYMREF=01 and ISPACKED=02 are public interfaces */
 #define REF_KNOWS_PEELED 04
@@ -671,57 +672,23 @@ static struct ref_lock *verify_lock(struct ref_lock *lock,
        return lock;
 }
 
-static int remove_empty_dir_recursive(char *path, int len)
-{
-       DIR *dir = opendir(path);
-       struct dirent *e;
-       int ret = 0;
-
-       if (!dir)
-               return -1;
-       if (path[len-1] != '/')
-               path[len++] = '/';
-       while ((e = readdir(dir)) != NULL) {
-               struct stat st;
-               int namlen;
-               if ((e->d_name[0] == '.') &&
-                   ((e->d_name[1] == 0) ||
-                    ((e->d_name[1] == '.') && e->d_name[2] == 0)))
-                       continue; /* "." and ".." */
-
-               namlen = strlen(e->d_name);
-               if ((len + namlen < PATH_MAX) &&
-                   strcpy(path + len, e->d_name) &&
-                   !lstat(path, &st) &&
-                   S_ISDIR(st.st_mode) &&
-                   !remove_empty_dir_recursive(path, len + namlen))
-                       continue; /* happy */
-
-               /* path too long, stat fails, or non-directory still exists */
-               ret = -1;
-               break;
-       }
-       closedir(dir);
-       if (!ret) {
-               path[len] = 0;
-               ret = rmdir(path);
-       }
-       return ret;
-}
-
-static int remove_empty_directories(char *file)
+static int remove_empty_directories(const char *file)
 {
        /* we want to create a file but there is a directory there;
         * if that is an empty directory (or a directory that contains
         * only empty directories), remove them.
         */
-       char path[PATH_MAX];
-       int len = strlen(file);
+       struct strbuf path;
+       int result;
 
-       if (len >= PATH_MAX) /* path too long ;-) */
-               return -1;
-       strcpy(path, file);
-       return remove_empty_dir_recursive(path, len);
+       strbuf_init(&path, 20);
+       strbuf_addstr(&path, file);
+
+       result = remove_dir_recursively(&path, 1);
+
+       strbuf_release(&path);
+
+       return result;
 }
 
 static int is_refname_available(const char *ref, const char *oldref,