Kill off get_relative_cwd()

[git.git] / dir.c

diff --git a/dir.c b/dir.c
index 852e60f2a8d4784bf73d044f89fe822538121286..522a6fe9da5e95b44f19b5ffa804ce44d9c52cc7 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -253,6 +253,18 @@ static void *read_skip_worktree_file_from_index(const char *path, size_t *size)
        return data;
 }
 
+void free_excludes(struct exclude_list *el)
+{
+       int i;
+
+       for (i = 0; i < el->nr; i++)
+               free(el->excludes[i]);
+       free(el->excludes);
+
+       el->nr = 0;
+       el->excludes = NULL;
+}
+
 int add_excludes_from_file_to_list(const char *fname,
                                   const char *base,
                                   int baselen,
@@ -389,13 +401,6 @@ int excluded_from_list(const char *pathname,
                        int to_exclude = x->to_exclude;
 
                        if (x->flags & EXC_FLAG_MUSTBEDIR) {
-                               if (!dtype) {
-                                       if (!prefixcmp(pathname, exclude) &&
-                                           pathname[x->patternlen] == '/')
-                                               return to_exclude;
-                                       else
-                                               continue;
-                               }
                                if (*dtype == DT_UNKNOWN)
                                        *dtype = get_dtype(NULL, pathname, pathlen);
                                if (*dtype != DT_DIR)
@@ -996,51 +1001,45 @@ int file_exists(const char *f)
 }
 
 /*
- * get_relative_cwd() gets the prefix of the current working directory
- * relative to 'dir'.  If we are not inside 'dir', it returns NULL.
- *
- * As a convenience, it also returns NULL if 'dir' is already NULL.  The
- * reason for this behaviour is that it is natural for functions returning
- * directory names to return NULL to say "this directory does not exist"
- * or "this directory is invalid".  These cases are usually handled the
- * same as if the cwd is not inside 'dir' at all, so get_relative_cwd()
- * returns NULL for both of them.
- *
- * Most notably, get_relative_cwd(buffer, size, get_git_work_tree())
- * unifies the handling of "outside work tree" with "no work tree at all".
+ * Given two normalized paths (a trailing slash is ok), if subdir is
+ * outside dir, return -1.  Otherwise return the offset in subdir that
+ * can be used as relative path to dir.
  */
-char *get_relative_cwd(char *buffer, int size, const char *dir)
+int dir_inside_of(const char *subdir, const char *dir)
 {
-       char *cwd = buffer;
-
-       if (!dir)
-               return NULL;
-       if (!getcwd(buffer, size))
-               die_errno("can't find the current directory");
+       int offset = 0;
 
-       if (!is_absolute_path(dir))
-               dir = make_absolute_path(dir);
+       assert(dir && subdir && *dir && *subdir);
 
-       while (*dir && *dir == *cwd) {
+       while (*dir && *subdir && *dir == *subdir) {
                dir++;
-               cwd++;
-       }
-       if (*dir)
-               return NULL;
-       switch (*cwd) {
-       case '\0':
-               return cwd;
-       case '/':
-               return cwd + 1;
-       default:
-               return NULL;
+               subdir++;
+               offset++;
        }
+
+       /* hel[p]/me vs hel[l]/yeah */
+       if (*dir && *subdir)
+               return -1;
+
+       if (!*subdir)
+               return !*dir ? offset : -1; /* same dir */
+
+       /* foo/[b]ar vs foo/[] */
+       if (is_dir_sep(dir[-1]))
+               return is_dir_sep(subdir[-1]) ? offset : -1;
+
+       /* foo[/]bar vs foo[] */
+       return is_dir_sep(*subdir) ? offset + 1 : -1;
 }
 
 int is_inside_dir(const char *dir)
 {
-       char buffer[PATH_MAX];
-       return get_relative_cwd(buffer, sizeof(buffer), dir) != NULL;
+       char cwd[PATH_MAX];
+       if (!dir)
+               return 0;
+       if (!getcwd(cwd, sizeof(cwd)))
+               die_errno("can't find the current directory");
+       return dir_inside_of(cwd, dir) >= 0;
 }
 
 int is_empty_dir(const char *path)