diff options
Diffstat (limited to 'path.c')
| -rw-r--r-- | path.c | 435 |
1 files changed, 313 insertions, 122 deletions
@@ -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) { @@ -16,11 +17,15 @@ static int get_st_mode_bits(const char *path, int *mode) static char bad_path[] = "/bad-path/"; -static char *get_pathname(void) +static struct strbuf *get_pathname(void) { - static char pathname_array[4][PATH_MAX]; + static struct strbuf pathname_array[4] = { + STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT + }; static int index; - return pathname_array[3 & ++index]; + struct strbuf *sb = &pathname_array[3 & ++index]; + strbuf_reset(sb); + return sb; } static char *cleanup_path(char *path) @@ -34,6 +39,13 @@ static char *cleanup_path(char *path) return path; } +static void strbuf_cleanup_path(struct strbuf *sb) +{ + char *path = cleanup_path(sb->buf); + if (path > sb->buf) + strbuf_remove(sb, 0, path - sb->buf); +} + char *mksnpath(char *buf, size_t n, const char *fmt, ...) { va_list args; @@ -49,150 +61,207 @@ char *mksnpath(char *buf, size_t n, const char *fmt, ...) return cleanup_path(buf); } -static char *vsnpath(char *buf, size_t n, const char *fmt, va_list args) +static int dir_prefix(const char *buf, const char *dir) { - const char *git_dir = get_git_dir(); - size_t len; + int len = strlen(dir); + return !strncmp(buf, dir, len) && + (is_dir_sep(buf[len]) || buf[len] == '\0'); +} - len = strlen(git_dir); - if (n < len + 1) - goto bad; - memcpy(buf, git_dir, len); - if (len && !is_dir_sep(git_dir[len-1])) - buf[len++] = '/'; - len += vsnprintf(buf + len, n - len, fmt, args); - if (len >= n) - goto bad; - return cleanup_path(buf); -bad: - strlcpy(buf, bad_path, n); - return buf; +/* $buf =~ m|$dir/+$file| but without regex */ +static int is_dir_file(const char *buf, const char *dir, const char *file) +{ + int len = strlen(dir); + if (strncmp(buf, dir, len) || !is_dir_sep(buf[len])) + return 0; + while (is_dir_sep(buf[len])) + len++; + return !strcmp(buf + len, file); } -char *git_snpath(char *buf, size_t n, const char *fmt, ...) +static void replace_dir(struct strbuf *buf, int len, const char *newdir) { - char *ret; - va_list args; - va_start(args, fmt); - ret = vsnpath(buf, n, fmt, args); - va_end(args); - return ret; + int newlen = strlen(newdir); + int need_sep = (buf->buf[len] && !is_dir_sep(buf->buf[len])) && + !is_dir_sep(newdir[newlen - 1]); + if (need_sep) + len--; /* keep one char, to be replaced with '/' */ + strbuf_splice(buf, 0, len, newdir, newlen); + if (need_sep) + buf->buf[newlen] = '/'; } -char *git_pathdup(const char *fmt, ...) +static const char *common_list[] = { + "/branches", "/hooks", "/info", "!/logs", "/lost-found", + "/objects", "/refs", "/remotes", "/worktrees", "/rr-cache", "/svn", + "config", "!gc.pid", "packed-refs", "shallow", + NULL +}; + +static void update_common_dir(struct strbuf *buf, int git_dir_len) +{ + char *base = buf->buf + git_dir_len; + const char **p; + + if (is_dir_file(base, "logs", "HEAD") || + is_dir_file(base, "info", "sparse-checkout")) + return; /* keep this in $GIT_DIR */ + for (p = common_list; *p; p++) { + const char *path = *p; + int is_dir = 0; + if (*path == '!') + path++; + if (*path == '/') { + path++; + is_dir = 1; + } + if (is_dir && dir_prefix(base, path)) { + replace_dir(buf, git_dir_len, get_git_common_dir()); + return; + } + if (!is_dir && !strcmp(base, path)) { + replace_dir(buf, git_dir_len, get_git_common_dir()); + return; + } + } +} + +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; + if (git_graft_env && is_dir_file(base, "info", "grafts")) + strbuf_splice(buf, 0, buf->len, + get_graft_file(), strlen(get_graft_file())); + else if (git_index_env && !strcmp(base, "index")) + strbuf_splice(buf, 0, buf->len, + get_index_file(), strlen(get_index_file())); + else if (git_db_env && dir_prefix(base, "objects")) + replace_dir(buf, git_dir_len + 7, get_object_directory()); + else if (git_common_dir_env) + update_common_dir(buf, git_dir_len); +} + +static void do_git_path(struct strbuf *buf, const char *fmt, va_list args) +{ + int gitdir_len; + strbuf_addstr(buf, get_git_dir()); + if (buf->len && !is_dir_sep(buf->buf[buf->len - 1])) + strbuf_addch(buf, '/'); + gitdir_len = buf->len; + strbuf_vaddf(buf, fmt, args); + adjust_git_path(buf, gitdir_len); + strbuf_cleanup_path(buf); +} + +void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) { - char path[PATH_MAX], *ret; va_list args; va_start(args, fmt); - ret = vsnpath(path, sizeof(path), fmt, args); + do_git_path(sb, fmt, args); va_end(args); - return xstrdup(ret); } -char *mkpathdup(const char *fmt, ...) +const char *git_path(const char *fmt, ...) { - char *path; - struct strbuf sb = STRBUF_INIT; + struct strbuf *pathname = get_pathname(); va_list args; - va_start(args, fmt); - strbuf_vaddf(&sb, fmt, args); + do_git_path(pathname, fmt, args); va_end(args); - path = xstrdup(cleanup_path(sb.buf)); - - strbuf_release(&sb); - return path; + return pathname->buf; } -char *mkpath(const char *fmt, ...) +char *git_pathdup(const char *fmt, ...) { + struct strbuf path = STRBUF_INIT; va_list args; - unsigned len; - char *pathname = get_pathname(); - va_start(args, fmt); - len = vsnprintf(pathname, PATH_MAX, fmt, args); + do_git_path(&path, fmt, args); va_end(args); - if (len >= PATH_MAX) - return bad_path; - return cleanup_path(pathname); + return strbuf_detach(&path, NULL); } -char *git_path(const char *fmt, ...) +char *mkpathdup(const char *fmt, ...) { - char *pathname = get_pathname(); + struct strbuf sb = STRBUF_INIT; va_list args; - char *ret; - va_start(args, fmt); - ret = vsnpath(pathname, PATH_MAX, fmt, args); + strbuf_vaddf(&sb, fmt, args); va_end(args); - return ret; + strbuf_cleanup_path(&sb); + return strbuf_detach(&sb, NULL); } -void home_config_paths(char **global, char **xdg, char *file) +const char *mkpath(const char *fmt, ...) { - char *xdg_home = getenv("XDG_CONFIG_HOME"); - char *home = getenv("HOME"); - char *to_free = NULL; - - if (!home) { - if (global) - *global = NULL; - } else { - if (!xdg_home) { - to_free = mkpathdup("%s/.config", home); - xdg_home = to_free; - } - if (global) - *global = mkpathdup("%s/.gitconfig", home); - } - - if (!xdg_home) - *xdg = NULL; - else - *xdg = mkpathdup("%s/git/%s", xdg_home, file); - - free(to_free); + va_list args; + struct strbuf *pathname = get_pathname(); + va_start(args, fmt); + strbuf_vaddf(pathname, fmt, args); + va_end(args); + return cleanup_path(pathname->buf); } -char *git_path_submodule(const char *path, const char *fmt, ...) +static void do_submodule_path(struct strbuf *buf, const char *path, + const char *fmt, va_list args) { - char *pathname = get_pathname(); - struct strbuf buf = STRBUF_INIT; const char *git_dir; - va_list args; - unsigned len; - - len = strlen(path); - if (len > PATH_MAX-100) - return bad_path; - strbuf_addstr(&buf, path); - if (len && path[len-1] != '/') - strbuf_addch(&buf, '/'); - strbuf_addstr(&buf, ".git"); + strbuf_addstr(buf, path); + if (buf->len && buf->buf[buf->len - 1] != '/') + strbuf_addch(buf, '/'); + strbuf_addstr(buf, ".git"); - git_dir = read_gitfile(buf.buf); + git_dir = read_gitfile(buf->buf); if (git_dir) { - strbuf_reset(&buf); - strbuf_addstr(&buf, git_dir); + strbuf_reset(buf); + strbuf_addstr(buf, git_dir); } - strbuf_addch(&buf, '/'); + strbuf_addch(buf, '/'); - if (buf.len >= PATH_MAX) - return bad_path; - memcpy(pathname, buf.buf, buf.len + 1); + strbuf_vaddf(buf, fmt, args); + strbuf_cleanup_path(buf); +} - strbuf_release(&buf); - len = strlen(pathname); +char *git_pathdup_submodule(const char *path, const char *fmt, ...) +{ + va_list args; + struct strbuf buf = STRBUF_INIT; + va_start(args, fmt); + do_submodule_path(&buf, path, fmt, args); + va_end(args); + return strbuf_detach(&buf, NULL); +} +void strbuf_git_path_submodule(struct strbuf *buf, const char *path, + const char *fmt, ...) +{ + va_list args; va_start(args, fmt); - len += vsnprintf(pathname + len, PATH_MAX - len, fmt, args); + do_submodule_path(buf, path, fmt, args); va_end(args); - if (len >= PATH_MAX) - return bad_path; - return cleanup_path(pathname); } int validate_headref(const char *path) @@ -249,9 +318,7 @@ int validate_headref(const char *path) static struct passwd *getpw_str(const char *username, size_t len) { struct passwd *pw; - char *username_z = xmalloc(len + 1); - memcpy(username_z, username, len); - username_z[len] = '\0'; + char *username_z = xmemdupz(username, len); pw = getpwnam(username_z); free(username_z); return pw; @@ -265,28 +332,28 @@ static struct passwd *getpw_str(const char *username, size_t len) char *expand_user_path(const char *path) { struct strbuf user_path = STRBUF_INIT; - const char *first_slash = strchrnul(path, '/'); const char *to_copy = path; if (path == NULL) goto return_null; if (path[0] == '~') { + const char *first_slash = strchrnul(path, '/'); const char *username = path + 1; size_t username_len = first_slash - username; if (username_len == 0) { const char *home = getenv("HOME"); if (!home) goto return_null; - strbuf_add(&user_path, home, strlen(home)); + strbuf_addstr(&user_path, home); } else { struct passwd *pw = getpw_str(username, username_len); if (!pw) goto return_null; - strbuf_add(&user_path, pw->pw_dir, strlen(pw->pw_dir)); + strbuf_addstr(&user_path, pw->pw_dir); } to_copy = first_slash; } - strbuf_add(&user_path, to_copy, strlen(to_copy)); + strbuf_addstr(&user_path, to_copy); return strbuf_detach(&user_path, NULL); return_null: strbuf_release(&user_path); @@ -303,14 +370,9 @@ return_null: * (3) "relative/path" to mean cwd relative directory; or * (4) "/absolute/path" to mean absolute directory. * - * Unless "strict" is given, we try access() for existence of "%s.git/.git", - * "%s/.git", "%s.git", "%s" in this order. The first one that exists is - * what we try. - * - * Second, we try chdir() to that. Upon failure, we return NULL. - * - * Then, we try if the current directory is a valid git repository. - * Upon failure, we return NULL. + * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git" + * in this order. We select the first one that is a valid git repository, and + * chdir() to it. If none match, or we fail to chdir, we return NULL. * * If all goes well, we return the directory we used to chdir() (but * before ~user is expanded), avoiding getcwd() resolving symbolic @@ -434,6 +496,16 @@ int adjust_shared_perm(const char *path) return 0; } +static int have_same_root(const char *path1, const char *path2) +{ + int is_abs1, is_abs2; + + is_abs1 = is_absolute_path(path1); + is_abs2 = is_absolute_path(path2); + return (is_abs1 && is_abs2 && tolower(path1[0]) == tolower(path2[0])) || + (!is_abs1 && !is_abs2); +} + /* * Give path as relative to prefix. * @@ -454,6 +526,16 @@ const char *relative_path(const char *in, const char *prefix, else if (!prefix_len) return in; + if (have_same_root(in, prefix)) { + /* bypass dos_drive, for "c:" is identical to "C:" */ + if (has_dos_drive_prefix(in)) { + i = 2; + j = 2; + } + } else { + return in; + } + while (i < prefix_len && j < in_len && prefix[i] == in[j]) { if (is_dir_sep(prefix[i])) { while (is_dir_sep(prefix[i])) @@ -531,6 +613,51 @@ const char *relative_path(const char *in, const char *prefix, } /* + * A simpler implementation of relative_path + * + * Get relative path by removing "prefix" from "in". This function + * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter + * to increase performance when traversing the path to work_tree. + */ +const char *remove_leading_path(const char *in, const char *prefix) +{ + static char buf[PATH_MAX + 1]; + int i = 0, j = 0; + + if (!prefix || !prefix[0]) + return in; + while (prefix[i]) { + if (is_dir_sep(prefix[i])) { + if (!is_dir_sep(in[j])) + return in; + while (is_dir_sep(prefix[i])) + i++; + while (is_dir_sep(in[j])) + j++; + continue; + } else if (in[j] != prefix[i]) { + return in; + } + i++; + j++; + } + if ( + /* "/foo" is a prefix of "/foo" */ + in[j] && + /* "/foo" is not a prefix of "/foobar" */ + !is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j]) + ) + return in; + while (is_dir_sep(in[j])) + j++; + if (!in[j]) + strcpy(buf, "."); + else + strcpy(buf, in + j); + return buf; +} + +/* * It is okay if dst == src, but they should not overlap otherwise. * * Performs the following normalizations on src, storing the result in dst: @@ -543,8 +670,14 @@ const char *relative_path(const char *in, const char *prefix, * * Note that this function is purely textual. It does not follow symlinks, * verify the existence of the path, or make any system calls. + * + * prefix_len != NULL is for a specific case of prefix_pathspec(): + * assume that src == dst and src[0..prefix_len-1] is already + * normalized, any time "../" eats up to the prefix_len part, + * prefix_len is reduced. In the end prefix_len is the remaining + * prefix that has not been overridden by user pathspec. */ -int normalize_path_copy(char *dst, const char *src) +int normalize_path_copy_len(char *dst, const char *src, int *prefix_len) { char *dst0; @@ -619,11 +752,18 @@ int normalize_path_copy(char *dst, const char *src) /* Windows: dst[-1] cannot be backslash anymore */ while (dst0 < dst && dst[-1] != '/') dst--; + if (prefix_len && *prefix_len > dst - dst0) + *prefix_len = dst - dst0; } *dst = '\0'; return 0; } +int normalize_path_copy(char *dst, const char *src) +{ + return normalize_path_copy_len(dst, src, NULL); +} + /* * path = Canonical absolute path * prefixes = string_list containing normalized, absolute paths without @@ -746,9 +886,60 @@ int daemon_avoid_alias(const char *p) } } -int offset_1st_component(const char *path) +static int only_spaces_and_periods(const char *path, size_t len, size_t skip) +{ + if (len < skip) + return 0; + len -= skip; + path += skip; + while (len-- > 0) { + char c = *(path++); + if (c != ' ' && c != '.') + return 0; + } + return 1; +} + +int is_ntfs_dotgit(const char *name) +{ + int len; + + for (len = 0; ; len++) + if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) { + if (only_spaces_and_periods(name, len, 4) && + !strncasecmp(name, ".git", 4)) + return 1; + if (only_spaces_and_periods(name, len, 5) && + !strncasecmp(name, "git~1", 5)) + return 1; + if (name[len] != '\\') + return 0; + name += len + 1; + len = -1; + } +} + +char *xdg_config_home(const char *filename) { - if (has_dos_drive_prefix(path)) - return 2 + is_dir_sep(path[2]); - return is_dir_sep(path[0]); + const char *home, *config_home; + + assert(filename); + config_home = getenv("XDG_CONFIG_HOME"); + if (config_home && *config_home) + return mkpathdup("%s/git/%s", config_home, filename); + + home = getenv("HOME"); + if (home) + return mkpathdup("%s/.config/git/%s", home, filename); + return NULL; } + +GIT_PATH_FUNC(git_path_cherry_pick_head, "CHERRY_PICK_HEAD") +GIT_PATH_FUNC(git_path_revert_head, "REVERT_HEAD") +GIT_PATH_FUNC(git_path_squash_msg, "SQUASH_MSG") +GIT_PATH_FUNC(git_path_merge_msg, "MERGE_MSG") +GIT_PATH_FUNC(git_path_merge_rr, "MERGE_RR") +GIT_PATH_FUNC(git_path_merge_mode, "MERGE_MODE") +GIT_PATH_FUNC(git_path_merge_head, "MERGE_HEAD") +GIT_PATH_FUNC(git_path_fetch_head, "FETCH_HEAD") +GIT_PATH_FUNC(git_path_shallow, "shallow") |