diff options
| -rw-r--r-- | dir.c | 70 | ||||
| -rw-r--r-- | dir.h | 2 | ||||
| -rw-r--r-- | setup.c | 7 |
3 files changed, 34 insertions, 45 deletions
@@ -1105,57 +1105,45 @@ 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 = real_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: - /* - * dir can end with a path separator when it's root - * directory. Return proper prefix in that case. - */ - if (dir[-1] == '/') - return cwd; - 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) @@ -85,8 +85,8 @@ extern void add_exclude(const char *string, const char *base, extern void free_excludes(struct exclude_list *el); extern int file_exists(const char *); -extern char *get_relative_cwd(char *buffer, int size, const char *dir); extern int is_inside_dir(const char *dir); +extern int dir_inside_of(const char *subdir, const char *dir); static inline int is_dot_or_dotdot(const char *name) { @@ -325,6 +325,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv, const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); const char *worktree; char *gitfile; + int offset; if (PATH_MAX - 40 < strlen(gitdirenv)) die("'$%s' too big", GIT_DIR_ENVIRONMENT); @@ -390,15 +391,15 @@ static const char *setup_explicit_git_dir(const char *gitdirenv, return NULL; } - if (!prefixcmp(cwd, worktree) && - cwd[strlen(worktree)] == '/') { /* cwd inside worktree */ + offset = dir_inside_of(cwd, worktree); + if (offset >= 0) { /* cwd inside worktree? */ set_git_dir(real_path(gitdirenv)); if (chdir(worktree)) die_errno("Could not chdir to '%s'", worktree); cwd[len++] = '/'; cwd[len] = '\0'; free(gitfile); - return cwd + strlen(worktree) + 1; + return cwd + offset; } /* cwd outside worktree */ |