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-rw-r--r--path.c1594
1 files changed, 1594 insertions, 0 deletions
diff --git a/path.c b/path.c
new file mode 100644
index 0000000..67e2690
--- /dev/null
+++ b/path.c
@@ -0,0 +1,1594 @@
+/*
+ * Utilities for paths and pathnames
+ */
+#include "git-compat-util.h"
+#include "abspath.h"
+#include "environment.h"
+#include "gettext.h"
+#include "hex.h"
+#include "repository.h"
+#include "strbuf.h"
+#include "string-list.h"
+#include "dir.h"
+#include "worktree.h"
+#include "setup.h"
+#include "submodule-config.h"
+#include "path.h"
+#include "packfile.h"
+#include "object-store-ll.h"
+#include "lockfile.h"
+#include "exec-cmd.h"
+
+static int get_st_mode_bits(const char *path, int *mode)
+{
+ struct stat st;
+ if (lstat(path, &st) < 0)
+ return -1;
+ *mode = st.st_mode;
+ return 0;
+}
+
+static char bad_path[] = "/bad-path/";
+
+static struct strbuf *get_pathname(void)
+{
+ static struct strbuf pathname_array[4] = {
+ STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT
+ };
+ static int index;
+ struct strbuf *sb = &pathname_array[index];
+ index = (index + 1) % ARRAY_SIZE(pathname_array);
+ strbuf_reset(sb);
+ return sb;
+}
+
+static const char *cleanup_path(const char *path)
+{
+ /* Clean it up */
+ if (skip_prefix(path, "./", &path)) {
+ while (*path == '/')
+ path++;
+ }
+ return path;
+}
+
+static void strbuf_cleanup_path(struct strbuf *sb)
+{
+ const 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;
+ unsigned len;
+
+ va_start(args, fmt);
+ len = vsnprintf(buf, n, fmt, args);
+ va_end(args);
+ if (len >= n) {
+ strlcpy(buf, bad_path, n);
+ return buf;
+ }
+ return (char *)cleanup_path(buf);
+}
+
+static int dir_prefix(const char *buf, const char *dir)
+{
+ int len = strlen(dir);
+ return !strncmp(buf, dir, len) &&
+ (is_dir_sep(buf[len]) || buf[len] == '\0');
+}
+
+/* $buf =~ m|$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);
+}
+
+static void replace_dir(struct strbuf *buf, int len, const char *newdir)
+{
+ 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] = '/';
+}
+
+struct common_dir {
+ /* Not considered garbage for report_linked_checkout_garbage */
+ unsigned ignore_garbage:1;
+ unsigned is_dir:1;
+ /* Belongs to the common dir, though it may contain paths that don't */
+ unsigned is_common:1;
+ const char *path;
+};
+
+static struct common_dir common_list[] = {
+ { 0, 1, 1, "branches" },
+ { 0, 1, 1, "common" },
+ { 0, 1, 1, "hooks" },
+ { 0, 1, 1, "info" },
+ { 0, 0, 0, "info/sparse-checkout" },
+ { 1, 1, 1, "logs" },
+ { 1, 0, 0, "logs/HEAD" },
+ { 0, 1, 0, "logs/refs/bisect" },
+ { 0, 1, 0, "logs/refs/rewritten" },
+ { 0, 1, 0, "logs/refs/worktree" },
+ { 0, 1, 1, "lost-found" },
+ { 0, 1, 1, "objects" },
+ { 0, 1, 1, "refs" },
+ { 0, 1, 0, "refs/bisect" },
+ { 0, 1, 0, "refs/rewritten" },
+ { 0, 1, 0, "refs/worktree" },
+ { 0, 1, 1, "remotes" },
+ { 0, 1, 1, "worktrees" },
+ { 0, 1, 1, "rr-cache" },
+ { 0, 1, 1, "svn" },
+ { 0, 0, 1, "config" },
+ { 1, 0, 1, "gc.pid" },
+ { 0, 0, 1, "packed-refs" },
+ { 0, 0, 1, "shallow" },
+ { 0, 0, 0, NULL }
+};
+
+/*
+ * A compressed trie. A trie node consists of zero or more characters that
+ * are common to all elements with this prefix, optionally followed by some
+ * children. If value is not NULL, the trie node is a terminal node.
+ *
+ * For example, consider the following set of strings:
+ * abc
+ * def
+ * definite
+ * definition
+ *
+ * The trie would look like:
+ * root: len = 0, children a and d non-NULL, value = NULL.
+ * a: len = 2, contents = bc, value = (data for "abc")
+ * d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
+ * i: len = 3, contents = nit, children e and i non-NULL, value = NULL
+ * e: len = 0, children all NULL, value = (data for "definite")
+ * i: len = 2, contents = on, children all NULL,
+ * value = (data for "definition")
+ */
+struct trie {
+ struct trie *children[256];
+ int len;
+ char *contents;
+ void *value;
+};
+
+static struct trie *make_trie_node(const char *key, void *value)
+{
+ struct trie *new_node = xcalloc(1, sizeof(*new_node));
+ new_node->len = strlen(key);
+ if (new_node->len) {
+ new_node->contents = xmalloc(new_node->len);
+ memcpy(new_node->contents, key, new_node->len);
+ }
+ new_node->value = value;
+ return new_node;
+}
+
+/*
+ * Add a key/value pair to a trie. The key is assumed to be \0-terminated.
+ * If there was an existing value for this key, return it.
+ */
+static void *add_to_trie(struct trie *root, const char *key, void *value)
+{
+ struct trie *child;
+ void *old;
+ int i;
+
+ if (!*key) {
+ /* we have reached the end of the key */
+ old = root->value;
+ root->value = value;
+ return old;
+ }
+
+ for (i = 0; i < root->len; i++) {
+ if (root->contents[i] == key[i])
+ continue;
+
+ /*
+ * Split this node: child will contain this node's
+ * existing children.
+ */
+ child = xmalloc(sizeof(*child));
+ memcpy(child->children, root->children, sizeof(root->children));
+
+ child->len = root->len - i - 1;
+ if (child->len) {
+ child->contents = xstrndup(root->contents + i + 1,
+ child->len);
+ }
+ child->value = root->value;
+ root->value = NULL;
+ root->len = i;
+
+ memset(root->children, 0, sizeof(root->children));
+ root->children[(unsigned char)root->contents[i]] = child;
+
+ /* This is the newly-added child. */
+ root->children[(unsigned char)key[i]] =
+ make_trie_node(key + i + 1, value);
+ return NULL;
+ }
+
+ /* We have matched the entire compressed section */
+ if (key[i]) {
+ child = root->children[(unsigned char)key[root->len]];
+ if (child) {
+ return add_to_trie(child, key + root->len + 1, value);
+ } else {
+ child = make_trie_node(key + root->len + 1, value);
+ root->children[(unsigned char)key[root->len]] = child;
+ return NULL;
+ }
+ }
+
+ old = root->value;
+ root->value = value;
+ return old;
+}
+
+typedef int (*match_fn)(const char *unmatched, void *value, void *baton);
+
+/*
+ * Search a trie for some key. Find the longest /-or-\0-terminated
+ * prefix of the key for which the trie contains a value. If there is
+ * no such prefix, return -1. Otherwise call fn with the unmatched
+ * portion of the key and the found value. If fn returns 0 or
+ * positive, then return its return value. If fn returns negative,
+ * then call fn with the next-longest /-terminated prefix of the key
+ * (i.e. a parent directory) for which the trie contains a value, and
+ * handle its return value the same way. If there is no shorter
+ * /-terminated prefix with a value left, then return the negative
+ * return value of the most recent fn invocation.
+ *
+ * The key is partially normalized: consecutive slashes are skipped.
+ *
+ * For example, consider the trie containing only [logs,
+ * logs/refs/bisect], both with values, but not logs/refs.
+ *
+ * | key | unmatched | prefix to node | return value |
+ * |--------------------|----------------|------------------|--------------|
+ * | a | not called | n/a | -1 |
+ * | logstore | not called | n/a | -1 |
+ * | logs | \0 | logs | as per fn |
+ * | logs/ | / | logs | as per fn |
+ * | logs/refs | /refs | logs | as per fn |
+ * | logs/refs/ | /refs/ | logs | as per fn |
+ * | logs/refs/b | /refs/b | logs | as per fn |
+ * | logs/refs/bisected | /refs/bisected | logs | as per fn |
+ * | logs/refs/bisect | \0 | logs/refs/bisect | as per fn |
+ * | logs/refs/bisect/ | / | logs/refs/bisect | as per fn |
+ * | logs/refs/bisect/a | /a | logs/refs/bisect | as per fn |
+ * | (If fn in the previous line returns -1, then fn is called once more:) |
+ * | logs/refs/bisect/a | /refs/bisect/a | logs | as per fn |
+ * |--------------------|----------------|------------------|--------------|
+ */
+static int trie_find(struct trie *root, const char *key, match_fn fn,
+ void *baton)
+{
+ int i;
+ int result;
+ struct trie *child;
+
+ if (!*key) {
+ /* we have reached the end of the key */
+ if (root->value && !root->len)
+ return fn(key, root->value, baton);
+ else
+ return -1;
+ }
+
+ for (i = 0; i < root->len; i++) {
+ /* Partial path normalization: skip consecutive slashes. */
+ if (key[i] == '/' && key[i+1] == '/') {
+ key++;
+ continue;
+ }
+ if (root->contents[i] != key[i])
+ return -1;
+ }
+
+ /* Matched the entire compressed section */
+ key += i;
+ if (!*key) {
+ /* End of key */
+ if (root->value)
+ return fn(key, root->value, baton);
+ else
+ return -1;
+ }
+
+ /* Partial path normalization: skip consecutive slashes */
+ while (key[0] == '/' && key[1] == '/')
+ key++;
+
+ child = root->children[(unsigned char)*key];
+ if (child)
+ result = trie_find(child, key + 1, fn, baton);
+ else
+ result = -1;
+
+ if (result >= 0 || (*key != '/' && *key != 0))
+ return result;
+ if (root->value)
+ return fn(key, root->value, baton);
+ else
+ return -1;
+}
+
+static struct trie common_trie;
+static int common_trie_done_setup;
+
+static void init_common_trie(void)
+{
+ struct common_dir *p;
+
+ if (common_trie_done_setup)
+ return;
+
+ for (p = common_list; p->path; p++)
+ add_to_trie(&common_trie, p->path, p);
+
+ common_trie_done_setup = 1;
+}
+
+/*
+ * Helper function for update_common_dir: returns 1 if the dir
+ * prefix is common.
+ */
+static int check_common(const char *unmatched, void *value,
+ void *baton UNUSED)
+{
+ struct common_dir *dir = value;
+
+ if (dir->is_dir && (unmatched[0] == 0 || unmatched[0] == '/'))
+ return dir->is_common;
+
+ if (!dir->is_dir && unmatched[0] == 0)
+ return dir->is_common;
+
+ return 0;
+}
+
+static void update_common_dir(struct strbuf *buf, int git_dir_len,
+ const char *common_dir)
+{
+ char *base = buf->buf + git_dir_len;
+ int has_lock_suffix = strbuf_strip_suffix(buf, LOCK_SUFFIX);
+
+ init_common_trie();
+ if (trie_find(&common_trie, base, check_common, NULL) > 0)
+ replace_dir(buf, git_dir_len, common_dir);
+
+ if (has_lock_suffix)
+ strbuf_addstr(buf, LOCK_SUFFIX);
+}
+
+void report_linked_checkout_garbage(void)
+{
+ struct strbuf sb = STRBUF_INIT;
+ const struct common_dir *p;
+ int len;
+
+ if (!the_repository->different_commondir)
+ return;
+ strbuf_addf(&sb, "%s/", get_git_dir());
+ len = sb.len;
+ for (p = common_list; p->path; p++) {
+ const char *path = p->path;
+ if (p->ignore_garbage)
+ continue;
+ strbuf_setlen(&sb, len);
+ strbuf_addstr(&sb, path);
+ if (file_exists(sb.buf))
+ report_garbage(PACKDIR_FILE_GARBAGE, sb.buf);
+ }
+ strbuf_release(&sb);
+}
+
+static void adjust_git_path(const struct repository *repo,
+ struct strbuf *buf, int git_dir_len)
+{
+ const char *base = buf->buf + git_dir_len;
+ if (is_dir_file(base, "info", "grafts"))
+ strbuf_splice(buf, 0, buf->len,
+ repo->graft_file, strlen(repo->graft_file));
+ else if (!strcmp(base, "index"))
+ strbuf_splice(buf, 0, buf->len,
+ repo->index_file, strlen(repo->index_file));
+ else if (dir_prefix(base, "objects"))
+ replace_dir(buf, git_dir_len + 7, repo->objects->odb->path);
+ else if (git_hooks_path && dir_prefix(base, "hooks"))
+ replace_dir(buf, git_dir_len + 5, git_hooks_path);
+ else if (repo->different_commondir)
+ update_common_dir(buf, git_dir_len, repo->commondir);
+}
+
+static void strbuf_worktree_gitdir(struct strbuf *buf,
+ const struct repository *repo,
+ const struct worktree *wt)
+{
+ if (!wt)
+ strbuf_addstr(buf, repo->gitdir);
+ else if (!wt->id)
+ strbuf_addstr(buf, repo->commondir);
+ else
+ strbuf_git_common_path(buf, repo, "worktrees/%s", wt->id);
+}
+
+static void do_git_path(const struct repository *repo,
+ const struct worktree *wt, struct strbuf *buf,
+ const char *fmt, va_list args)
+{
+ int gitdir_len;
+ strbuf_worktree_gitdir(buf, repo, wt);
+ if (buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
+ strbuf_addch(buf, '/');
+ gitdir_len = buf->len;
+ strbuf_vaddf(buf, fmt, args);
+ if (!wt)
+ adjust_git_path(repo, buf, gitdir_len);
+ strbuf_cleanup_path(buf);
+}
+
+char *repo_git_path(const struct repository *repo,
+ const char *fmt, ...)
+{
+ struct strbuf path = STRBUF_INIT;
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(repo, NULL, &path, fmt, args);
+ va_end(args);
+ return strbuf_detach(&path, NULL);
+}
+
+void strbuf_repo_git_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(repo, NULL, sb, fmt, args);
+ va_end(args);
+}
+
+char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
+{
+ va_list args;
+ strbuf_reset(buf);
+ va_start(args, fmt);
+ do_git_path(the_repository, NULL, buf, fmt, args);
+ va_end(args);
+ return buf->buf;
+}
+
+void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(the_repository, NULL, sb, fmt, args);
+ va_end(args);
+}
+
+const char *git_path(const char *fmt, ...)
+{
+ struct strbuf *pathname = get_pathname();
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(the_repository, NULL, pathname, fmt, args);
+ va_end(args);
+ return pathname->buf;
+}
+
+char *git_pathdup(const char *fmt, ...)
+{
+ struct strbuf path = STRBUF_INIT;
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(the_repository, NULL, &path, fmt, args);
+ va_end(args);
+ return strbuf_detach(&path, NULL);
+}
+
+char *mkpathdup(const char *fmt, ...)
+{
+ struct strbuf sb = STRBUF_INIT;
+ va_list args;
+ va_start(args, fmt);
+ strbuf_vaddf(&sb, fmt, args);
+ va_end(args);
+ strbuf_cleanup_path(&sb);
+ return strbuf_detach(&sb, NULL);
+}
+
+const char *mkpath(const char *fmt, ...)
+{
+ 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);
+}
+
+const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...)
+{
+ struct strbuf *pathname = get_pathname();
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(the_repository, wt, pathname, fmt, args);
+ va_end(args);
+ return pathname->buf;
+}
+
+static void do_worktree_path(const struct repository *repo,
+ struct strbuf *buf,
+ const char *fmt, va_list args)
+{
+ strbuf_addstr(buf, repo->worktree);
+ if(buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
+ strbuf_addch(buf, '/');
+
+ strbuf_vaddf(buf, fmt, args);
+ strbuf_cleanup_path(buf);
+}
+
+char *repo_worktree_path(const struct repository *repo, const char *fmt, ...)
+{
+ struct strbuf path = STRBUF_INIT;
+ va_list args;
+
+ if (!repo->worktree)
+ return NULL;
+
+ va_start(args, fmt);
+ do_worktree_path(repo, &path, fmt, args);
+ va_end(args);
+
+ return strbuf_detach(&path, NULL);
+}
+
+void strbuf_repo_worktree_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ if (!repo->worktree)
+ return;
+
+ va_start(args, fmt);
+ do_worktree_path(repo, sb, fmt, args);
+ va_end(args);
+}
+
+/* Returns 0 on success, negative on failure. */
+static int do_submodule_path(struct strbuf *buf, const char *path,
+ const char *fmt, va_list args)
+{
+ struct strbuf git_submodule_common_dir = STRBUF_INIT;
+ struct strbuf git_submodule_dir = STRBUF_INIT;
+ int ret;
+
+ ret = submodule_to_gitdir(&git_submodule_dir, path);
+ if (ret)
+ goto cleanup;
+
+ strbuf_complete(&git_submodule_dir, '/');
+ strbuf_addbuf(buf, &git_submodule_dir);
+ strbuf_vaddf(buf, fmt, args);
+
+ if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf))
+ update_common_dir(buf, git_submodule_dir.len, git_submodule_common_dir.buf);
+
+ strbuf_cleanup_path(buf);
+
+cleanup:
+ strbuf_release(&git_submodule_dir);
+ strbuf_release(&git_submodule_common_dir);
+ return ret;
+}
+
+char *git_pathdup_submodule(const char *path, const char *fmt, ...)
+{
+ int err;
+ va_list args;
+ struct strbuf buf = STRBUF_INIT;
+ va_start(args, fmt);
+ err = do_submodule_path(&buf, path, fmt, args);
+ va_end(args);
+ if (err) {
+ strbuf_release(&buf);
+ return NULL;
+ }
+ return strbuf_detach(&buf, NULL);
+}
+
+int strbuf_git_path_submodule(struct strbuf *buf, const char *path,
+ const char *fmt, ...)
+{
+ int err;
+ va_list args;
+ va_start(args, fmt);
+ err = do_submodule_path(buf, path, fmt, args);
+ va_end(args);
+
+ return err;
+}
+
+static void do_git_common_path(const struct repository *repo,
+ struct strbuf *buf,
+ const char *fmt,
+ va_list args)
+{
+ strbuf_addstr(buf, repo->commondir);
+ if (buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
+ strbuf_addch(buf, '/');
+ strbuf_vaddf(buf, fmt, args);
+ strbuf_cleanup_path(buf);
+}
+
+const char *git_common_path(const char *fmt, ...)
+{
+ struct strbuf *pathname = get_pathname();
+ va_list args;
+ va_start(args, fmt);
+ do_git_common_path(the_repository, pathname, fmt, args);
+ va_end(args);
+ return pathname->buf;
+}
+
+void strbuf_git_common_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ do_git_common_path(repo, sb, fmt, args);
+ va_end(args);
+}
+
+int validate_headref(const char *path)
+{
+ struct stat st;
+ char buffer[256];
+ const char *refname;
+ struct object_id oid;
+ int fd;
+ ssize_t len;
+
+ if (lstat(path, &st) < 0)
+ return -1;
+
+ /* Make sure it is a "refs/.." symlink */
+ if (S_ISLNK(st.st_mode)) {
+ len = readlink(path, buffer, sizeof(buffer)-1);
+ if (len >= 5 && !memcmp("refs/", buffer, 5))
+ return 0;
+ return -1;
+ }
+
+ /*
+ * Anything else, just open it and try to see if it is a symbolic ref.
+ */
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return -1;
+ len = read_in_full(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+
+ if (len < 0)
+ return -1;
+ buffer[len] = '\0';
+
+ /*
+ * Is it a symbolic ref?
+ */
+ if (skip_prefix(buffer, "ref:", &refname)) {
+ while (isspace(*refname))
+ refname++;
+ if (starts_with(refname, "refs/"))
+ return 0;
+ }
+
+ /*
+ * Is this a detached HEAD?
+ */
+ if (!get_oid_hex(buffer, &oid))
+ return 0;
+
+ return -1;
+}
+
+static struct passwd *getpw_str(const char *username, size_t len)
+{
+ struct passwd *pw;
+ char *username_z = xmemdupz(username, len);
+ pw = getpwnam(username_z);
+ free(username_z);
+ return pw;
+}
+
+/*
+ * Return a string with ~ and ~user expanded via getpw*. Returns NULL on getpw
+ * failure or if path is NULL.
+ *
+ * If real_home is true, strbuf_realpath($HOME) is used in the `~/` expansion.
+ *
+ * If the path starts with `%(prefix)/`, the remainder is interpreted as
+ * relative to where Git is installed, and expanded to the absolute path.
+ */
+char *interpolate_path(const char *path, int real_home)
+{
+ struct strbuf user_path = STRBUF_INIT;
+ const char *to_copy = path;
+
+ if (!path)
+ goto return_null;
+
+ if (skip_prefix(path, "%(prefix)/", &path))
+ return system_path(path);
+
+ 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;
+ if (real_home)
+ strbuf_add_real_path(&user_path, home);
+ else
+ strbuf_addstr(&user_path, home);
+#ifdef GIT_WINDOWS_NATIVE
+ convert_slashes(user_path.buf);
+#endif
+ } else {
+ struct passwd *pw = getpw_str(username, username_len);
+ if (!pw)
+ goto return_null;
+ strbuf_addstr(&user_path, pw->pw_dir);
+ }
+ to_copy = first_slash;
+ }
+ strbuf_addstr(&user_path, to_copy);
+ return strbuf_detach(&user_path, NULL);
+return_null:
+ strbuf_release(&user_path);
+ return NULL;
+}
+
+/*
+ * First, one directory to try is determined by the following algorithm.
+ *
+ * (0) If "strict" is given, the path is used as given and no DWIM is
+ * done. Otherwise:
+ * (1) "~/path" to mean path under the running user's home directory;
+ * (2) "~user/path" to mean path under named user's home directory;
+ * (3) "relative/path" to mean cwd relative directory; or
+ * (4) "/absolute/path" to mean absolute directory.
+ *
+ * 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
+ * links. User relative paths are also returned as they are given,
+ * except DWIM suffixing.
+ */
+const char *enter_repo(const char *path, int strict)
+{
+ static struct strbuf validated_path = STRBUF_INIT;
+ static struct strbuf used_path = STRBUF_INIT;
+
+ if (!path)
+ return NULL;
+
+ if (!strict) {
+ static const char *suffix[] = {
+ "/.git", "", ".git/.git", ".git", NULL,
+ };
+ const char *gitfile;
+ int len = strlen(path);
+ int i;
+ while ((1 < len) && (path[len-1] == '/'))
+ len--;
+
+ /*
+ * We can handle arbitrary-sized buffers, but this remains as a
+ * sanity check on untrusted input.
+ */
+ if (PATH_MAX <= len)
+ return NULL;
+
+ strbuf_reset(&used_path);
+ strbuf_reset(&validated_path);
+ strbuf_add(&used_path, path, len);
+ strbuf_add(&validated_path, path, len);
+
+ if (used_path.buf[0] == '~') {
+ char *newpath = interpolate_path(used_path.buf, 0);
+ if (!newpath)
+ return NULL;
+ strbuf_attach(&used_path, newpath, strlen(newpath),
+ strlen(newpath));
+ }
+ for (i = 0; suffix[i]; i++) {
+ struct stat st;
+ size_t baselen = used_path.len;
+ strbuf_addstr(&used_path, suffix[i]);
+ if (!stat(used_path.buf, &st) &&
+ (S_ISREG(st.st_mode) ||
+ (S_ISDIR(st.st_mode) && is_git_directory(used_path.buf)))) {
+ strbuf_addstr(&validated_path, suffix[i]);
+ break;
+ }
+ strbuf_setlen(&used_path, baselen);
+ }
+ if (!suffix[i])
+ return NULL;
+ gitfile = read_gitfile(used_path.buf);
+ if (gitfile) {
+ strbuf_reset(&used_path);
+ strbuf_addstr(&used_path, gitfile);
+ }
+ if (chdir(used_path.buf))
+ return NULL;
+ path = validated_path.buf;
+ }
+ else {
+ const char *gitfile = read_gitfile(path);
+ if (gitfile)
+ path = gitfile;
+ if (chdir(path))
+ return NULL;
+ }
+
+ if (is_git_directory(".")) {
+ set_git_dir(".", 0);
+ check_repository_format(NULL);
+ return path;
+ }
+
+ return NULL;
+}
+
+static int calc_shared_perm(int mode)
+{
+ int tweak;
+
+ if (get_shared_repository() < 0)
+ tweak = -get_shared_repository();
+ else
+ tweak = get_shared_repository();
+
+ if (!(mode & S_IWUSR))
+ tweak &= ~0222;
+ if (mode & S_IXUSR)
+ /* Copy read bits to execute bits */
+ tweak |= (tweak & 0444) >> 2;
+ if (get_shared_repository() < 0)
+ mode = (mode & ~0777) | tweak;
+ else
+ mode |= tweak;
+
+ return mode;
+}
+
+
+int adjust_shared_perm(const char *path)
+{
+ int old_mode, new_mode;
+
+ if (!get_shared_repository())
+ return 0;
+ if (get_st_mode_bits(path, &old_mode) < 0)
+ return -1;
+
+ new_mode = calc_shared_perm(old_mode);
+ if (S_ISDIR(old_mode)) {
+ /* Copy read bits to execute bits */
+ new_mode |= (new_mode & 0444) >> 2;
+
+ /*
+ * g+s matters only if any extra access is granted
+ * based on group membership.
+ */
+ if (FORCE_DIR_SET_GID && (new_mode & 060))
+ new_mode |= FORCE_DIR_SET_GID;
+ }
+
+ if (((old_mode ^ new_mode) & ~S_IFMT) &&
+ chmod(path, (new_mode & ~S_IFMT)) < 0)
+ return -2;
+ return 0;
+}
+
+void safe_create_dir(const char *dir, int share)
+{
+ if (mkdir(dir, 0777) < 0) {
+ if (errno != EEXIST) {
+ perror(dir);
+ exit(1);
+ }
+ }
+ else if (share && adjust_shared_perm(dir))
+ die(_("Could not make %s writable by group"), dir);
+}
+
+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.
+ *
+ * The strbuf may or may not be used, so do not assume it contains the
+ * returned path.
+ */
+const char *relative_path(const char *in, const char *prefix,
+ struct strbuf *sb)
+{
+ int in_len = in ? strlen(in) : 0;
+ int prefix_len = prefix ? strlen(prefix) : 0;
+ int in_off = 0;
+ int prefix_off = 0;
+ int i = 0, j = 0;
+
+ if (!in_len)
+ return "./";
+ else if (!prefix_len)
+ return in;
+
+ if (have_same_root(in, prefix))
+ /* bypass dos_drive, for "c:" is identical to "C:" */
+ i = j = has_dos_drive_prefix(in);
+ 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]))
+ i++;
+ while (is_dir_sep(in[j]))
+ j++;
+ prefix_off = i;
+ in_off = j;
+ } else {
+ i++;
+ j++;
+ }
+ }
+
+ if (
+ /* "prefix" seems like prefix of "in" */
+ i >= prefix_len &&
+ /*
+ * but "/foo" is not a prefix of "/foobar"
+ * (i.e. prefix not end with '/')
+ */
+ prefix_off < prefix_len) {
+ if (j >= in_len) {
+ /* in="/a/b", prefix="/a/b" */
+ in_off = in_len;
+ } else if (is_dir_sep(in[j])) {
+ /* in="/a/b/c", prefix="/a/b" */
+ while (is_dir_sep(in[j]))
+ j++;
+ in_off = j;
+ } else {
+ /* in="/a/bbb/c", prefix="/a/b" */
+ i = prefix_off;
+ }
+ } else if (
+ /* "in" is short than "prefix" */
+ j >= in_len &&
+ /* "in" not end with '/' */
+ in_off < in_len) {
+ if (is_dir_sep(prefix[i])) {
+ /* in="/a/b", prefix="/a/b/c/" */
+ while (is_dir_sep(prefix[i]))
+ i++;
+ in_off = in_len;
+ }
+ }
+ in += in_off;
+ in_len -= in_off;
+
+ if (i >= prefix_len) {
+ if (!in_len)
+ return "./";
+ else
+ return in;
+ }
+
+ strbuf_reset(sb);
+ strbuf_grow(sb, in_len);
+
+ while (i < prefix_len) {
+ if (is_dir_sep(prefix[i])) {
+ strbuf_addstr(sb, "../");
+ while (is_dir_sep(prefix[i]))
+ i++;
+ continue;
+ }
+ i++;
+ }
+ if (!is_dir_sep(prefix[prefix_len - 1]))
+ strbuf_addstr(sb, "../");
+
+ strbuf_addstr(sb, in);
+
+ return sb->buf;
+}
+
+/*
+ * 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 struct strbuf buf = STRBUF_INIT;
+ 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++;
+
+ strbuf_reset(&buf);
+ if (!in[j])
+ strbuf_addstr(&buf, ".");
+ else
+ strbuf_addstr(&buf, in + j);
+ return buf.buf;
+}
+
+/*
+ * It is okay if dst == src, but they should not overlap otherwise.
+ * The "dst" buffer must be at least as long as "src"; normalizing may shrink
+ * the size of the path, but will never grow it.
+ *
+ * Performs the following normalizations on src, storing the result in dst:
+ * - Ensures that components are separated by '/' (Windows only)
+ * - Squashes sequences of '/' except "//server/share" on Windows
+ * - Removes "." components.
+ * - Removes ".." components, and the components the precede them.
+ * Returns failure (non-zero) if a ".." component appears as first path
+ * component anytime during the normalization. Otherwise, returns success (0).
+ *
+ * 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.
+ *
+ * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'.
+ * For everything but the root folder itself, the normalized path should not
+ * end with a '/', then the callers need to be fixed up accordingly.
+ *
+ */
+int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
+{
+ char *dst0;
+ const char *end;
+
+ /*
+ * Copy initial part of absolute path: "/", "C:/", "//server/share/".
+ */
+ end = src + offset_1st_component(src);
+ while (src < end) {
+ char c = *src++;
+ if (is_dir_sep(c))
+ c = '/';
+ *dst++ = c;
+ }
+ dst0 = dst;
+
+ while (is_dir_sep(*src))
+ src++;
+
+ for (;;) {
+ char c = *src;
+
+ /*
+ * A path component that begins with . could be
+ * special:
+ * (1) "." and ends -- ignore and terminate.
+ * (2) "./" -- ignore them, eat slash and continue.
+ * (3) ".." and ends -- strip one and terminate.
+ * (4) "../" -- strip one, eat slash and continue.
+ */
+ if (c == '.') {
+ if (!src[1]) {
+ /* (1) */
+ src++;
+ } else if (is_dir_sep(src[1])) {
+ /* (2) */
+ src += 2;
+ while (is_dir_sep(*src))
+ src++;
+ continue;
+ } else if (src[1] == '.') {
+ if (!src[2]) {
+ /* (3) */
+ src += 2;
+ goto up_one;
+ } else if (is_dir_sep(src[2])) {
+ /* (4) */
+ src += 3;
+ while (is_dir_sep(*src))
+ src++;
+ goto up_one;
+ }
+ }
+ }
+
+ /* copy up to the next '/', and eat all '/' */
+ while ((c = *src++) != '\0' && !is_dir_sep(c))
+ *dst++ = c;
+ if (is_dir_sep(c)) {
+ *dst++ = '/';
+ while (is_dir_sep(c))
+ c = *src++;
+ src--;
+ } else if (!c)
+ break;
+ continue;
+
+ up_one:
+ /*
+ * dst0..dst is prefix portion, and dst[-1] is '/';
+ * go up one level.
+ */
+ dst--; /* go to trailing '/' */
+ if (dst <= dst0)
+ return -1;
+ /* 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);
+}
+
+int strbuf_normalize_path(struct strbuf *src)
+{
+ struct strbuf dst = STRBUF_INIT;
+
+ strbuf_grow(&dst, src->len);
+ if (normalize_path_copy(dst.buf, src->buf) < 0) {
+ strbuf_release(&dst);
+ return -1;
+ }
+
+ /*
+ * normalize_path does not tell us the new length, so we have to
+ * compute it by looking for the new NUL it placed
+ */
+ strbuf_setlen(&dst, strlen(dst.buf));
+ strbuf_swap(src, &dst);
+ strbuf_release(&dst);
+ return 0;
+}
+
+/*
+ * path = Canonical absolute path
+ * prefixes = string_list containing normalized, absolute paths without
+ * trailing slashes (except for the root directory, which is denoted by "/").
+ *
+ * Determines, for each path in prefixes, whether the "prefix"
+ * is an ancestor directory of path. Returns the length of the longest
+ * ancestor directory, excluding any trailing slashes, or -1 if no prefix
+ * is an ancestor. (Note that this means 0 is returned if prefixes is
+ * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
+ * are not considered to be their own ancestors. path must be in a
+ * canonical form: empty components, or "." or ".." components are not
+ * allowed.
+ */
+int longest_ancestor_length(const char *path, struct string_list *prefixes)
+{
+ int i, max_len = -1;
+
+ if (!strcmp(path, "/"))
+ return -1;
+
+ for (i = 0; i < prefixes->nr; i++) {
+ const char *ceil = prefixes->items[i].string;
+ int len = strlen(ceil);
+
+ /*
+ * For root directories (`/`, `C:/`, `//server/share/`)
+ * adjust the length to exclude the trailing slash.
+ */
+ if (len > 0 && ceil[len - 1] == '/')
+ len--;
+
+ if (strncmp(path, ceil, len) ||
+ path[len] != '/' || !path[len + 1])
+ continue; /* no match */
+
+ if (len > max_len)
+ max_len = len;
+ }
+
+ return max_len;
+}
+
+/* strip arbitrary amount of directory separators at end of path */
+static inline int chomp_trailing_dir_sep(const char *path, int len)
+{
+ while (len && is_dir_sep(path[len - 1]))
+ len--;
+ return len;
+}
+
+/*
+ * If path ends with suffix (complete path components), returns the offset of
+ * the last character in the path before the suffix (sans trailing directory
+ * separators), and -1 otherwise.
+ */
+static ssize_t stripped_path_suffix_offset(const char *path, const char *suffix)
+{
+ int path_len = strlen(path), suffix_len = strlen(suffix);
+
+ while (suffix_len) {
+ if (!path_len)
+ return -1;
+
+ if (is_dir_sep(path[path_len - 1])) {
+ if (!is_dir_sep(suffix[suffix_len - 1]))
+ return -1;
+ path_len = chomp_trailing_dir_sep(path, path_len);
+ suffix_len = chomp_trailing_dir_sep(suffix, suffix_len);
+ }
+ else if (path[--path_len] != suffix[--suffix_len])
+ return -1;
+ }
+
+ if (path_len && !is_dir_sep(path[path_len - 1]))
+ return -1;
+ return chomp_trailing_dir_sep(path, path_len);
+}
+
+/*
+ * Returns true if the path ends with components, considering only complete path
+ * components, and false otherwise.
+ */
+int ends_with_path_components(const char *path, const char *components)
+{
+ return stripped_path_suffix_offset(path, components) != -1;
+}
+
+/*
+ * If path ends with suffix (complete path components), returns the
+ * part before suffix (sans trailing directory separators).
+ * Otherwise returns NULL.
+ */
+char *strip_path_suffix(const char *path, const char *suffix)
+{
+ ssize_t offset = stripped_path_suffix_offset(path, suffix);
+
+ return offset == -1 ? NULL : xstrndup(path, offset);
+}
+
+int daemon_avoid_alias(const char *p)
+{
+ int sl, ndot;
+
+ /*
+ * This resurrects the belts and suspenders paranoia check by HPA
+ * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
+ * does not do getcwd() based path canonicalization.
+ *
+ * sl becomes true immediately after seeing '/' and continues to
+ * be true as long as dots continue after that without intervening
+ * non-dot character.
+ */
+ if (!p || (*p != '/' && *p != '~'))
+ return -1;
+ sl = 1; ndot = 0;
+ p++;
+
+ while (1) {
+ char ch = *p++;
+ if (sl) {
+ if (ch == '.')
+ ndot++;
+ else if (ch == '/') {
+ if (ndot < 3)
+ /* reject //, /./ and /../ */
+ return -1;
+ ndot = 0;
+ }
+ else if (ch == 0) {
+ if (0 < ndot && ndot < 3)
+ /* reject /.$ and /..$ */
+ return -1;
+ return 0;
+ }
+ else
+ sl = ndot = 0;
+ }
+ else if (ch == 0)
+ return 0;
+ else if (ch == '/') {
+ sl = 1;
+ ndot = 0;
+ }
+ }
+}
+
+/*
+ * On NTFS, we need to be careful to disallow certain synonyms of the `.git/`
+ * directory:
+ *
+ * - For historical reasons, file names that end in spaces or periods are
+ * automatically trimmed. Therefore, `.git . . ./` is a valid way to refer
+ * to `.git/`.
+ *
+ * - For other historical reasons, file names that do not conform to the 8.3
+ * format (up to eight characters for the basename, three for the file
+ * extension, certain characters not allowed such as `+`, etc) are associated
+ * with a so-called "short name", at least on the `C:` drive by default.
+ * Which means that `git~1/` is a valid way to refer to `.git/`.
+ *
+ * Note: Technically, `.git/` could receive the short name `git~2` if the
+ * short name `git~1` were already used. In Git, however, we guarantee that
+ * `.git` is the first item in a directory, therefore it will be associated
+ * with the short name `git~1` (unless short names are disabled).
+ *
+ * - For yet other historical reasons, NTFS supports so-called "Alternate Data
+ * Streams", i.e. metadata associated with a given file, referred to via
+ * `<filename>:<stream-name>:<stream-type>`. There exists a default stream
+ * type for directories, allowing `.git/` to be accessed via
+ * `.git::$INDEX_ALLOCATION/`.
+ *
+ * When this function returns 1, it indicates that the specified file/directory
+ * name refers to a `.git` file or directory, or to any of these synonyms, and
+ * Git should therefore not track it.
+ *
+ * For performance reasons, _all_ Alternate Data Streams of `.git/` are
+ * forbidden, not just `::$INDEX_ALLOCATION`.
+ *
+ * This function is intended to be used by `git fsck` even on platforms where
+ * the backslash is a regular filename character, therefore it needs to handle
+ * backlash characters in the provided `name` specially: they are interpreted
+ * as directory separators.
+ */
+int is_ntfs_dotgit(const char *name)
+{
+ char c;
+
+ /*
+ * Note that when we don't find `.git` or `git~1` we end up with `name`
+ * advanced partway through the string. That's okay, though, as we
+ * return immediately in those cases, without looking at `name` any
+ * further.
+ */
+ c = *(name++);
+ if (c == '.') {
+ /* .git */
+ if (((c = *(name++)) != 'g' && c != 'G') ||
+ ((c = *(name++)) != 'i' && c != 'I') ||
+ ((c = *(name++)) != 't' && c != 'T'))
+ return 0;
+ } else if (c == 'g' || c == 'G') {
+ /* git ~1 */
+ if (((c = *(name++)) != 'i' && c != 'I') ||
+ ((c = *(name++)) != 't' && c != 'T') ||
+ *(name++) != '~' ||
+ *(name++) != '1')
+ return 0;
+ } else
+ return 0;
+
+ for (;;) {
+ c = *(name++);
+ if (!c || is_xplatform_dir_sep(c) || c == ':')
+ return 1;
+ if (c != '.' && c != ' ')
+ return 0;
+ }
+}
+
+static int is_ntfs_dot_generic(const char *name,
+ const char *dotgit_name,
+ size_t len,
+ const char *dotgit_ntfs_shortname_prefix)
+{
+ int saw_tilde;
+ size_t i;
+
+ if ((name[0] == '.' && !strncasecmp(name + 1, dotgit_name, len))) {
+ i = len + 1;
+only_spaces_and_periods:
+ for (;;) {
+ char c = name[i++];
+ if (!c || c == ':')
+ return 1;
+ if (c != ' ' && c != '.')
+ return 0;
+ }
+ }
+
+ /*
+ * Is it a regular NTFS short name, i.e. shortened to 6 characters,
+ * followed by ~1, ... ~4?
+ */
+ if (!strncasecmp(name, dotgit_name, 6) && name[6] == '~' &&
+ name[7] >= '1' && name[7] <= '4') {
+ i = 8;
+ goto only_spaces_and_periods;
+ }
+
+ /*
+ * Is it a fall-back NTFS short name (for details, see
+ * https://en.wikipedia.org/wiki/8.3_filename?
+ */
+ for (i = 0, saw_tilde = 0; i < 8; i++)
+ if (name[i] == '\0')
+ return 0;
+ else if (saw_tilde) {
+ if (name[i] < '0' || name[i] > '9')
+ return 0;
+ } else if (name[i] == '~') {
+ if (name[++i] < '1' || name[i] > '9')
+ return 0;
+ saw_tilde = 1;
+ } else if (i >= 6)
+ return 0;
+ else if (name[i] & 0x80) {
+ /*
+ * We know our needles contain only ASCII, so we clamp
+ * here to make the results of tolower() sane.
+ */
+ return 0;
+ } else if (tolower(name[i]) != dotgit_ntfs_shortname_prefix[i])
+ return 0;
+
+ goto only_spaces_and_periods;
+}
+
+/*
+ * Inline helper to make sure compiler resolves strlen() on literals at
+ * compile time.
+ */
+static inline int is_ntfs_dot_str(const char *name, const char *dotgit_name,
+ const char *dotgit_ntfs_shortname_prefix)
+{
+ return is_ntfs_dot_generic(name, dotgit_name, strlen(dotgit_name),
+ dotgit_ntfs_shortname_prefix);
+}
+
+int is_ntfs_dotgitmodules(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitmodules", "gi7eba");
+}
+
+int is_ntfs_dotgitignore(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitignore", "gi250a");
+}
+
+int is_ntfs_dotgitattributes(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitattributes", "gi7d29");
+}
+
+int is_ntfs_dotmailmap(const char *name)
+{
+ return is_ntfs_dot_str(name, "mailmap", "maba30");
+}
+
+int looks_like_command_line_option(const char *str)
+{
+ return str && str[0] == '-';
+}
+
+char *xdg_config_home_for(const char *subdir, const char *filename)
+{
+ const char *home, *config_home;
+
+ assert(subdir);
+ assert(filename);
+ config_home = getenv("XDG_CONFIG_HOME");
+ if (config_home && *config_home)
+ return mkpathdup("%s/%s/%s", config_home, subdir, filename);
+
+ home = getenv("HOME");
+ if (home)
+ return mkpathdup("%s/.config/%s/%s", home, subdir, filename);
+
+ return NULL;
+}
+
+char *xdg_config_home(const char *filename)
+{
+ return xdg_config_home_for("git", filename);
+}
+
+char *xdg_cache_home(const char *filename)
+{
+ const char *home, *cache_home;
+
+ assert(filename);
+ cache_home = getenv("XDG_CACHE_HOME");
+ if (cache_home && *cache_home)
+ return mkpathdup("%s/git/%s", cache_home, filename);
+
+ home = getenv("HOME");
+ if (home)
+ return mkpathdup("%s/.cache/git/%s", home, filename);
+ return NULL;
+}
+
+REPO_GIT_PATH_FUNC(squash_msg, "SQUASH_MSG")
+REPO_GIT_PATH_FUNC(merge_msg, "MERGE_MSG")
+REPO_GIT_PATH_FUNC(merge_rr, "MERGE_RR")
+REPO_GIT_PATH_FUNC(merge_mode, "MERGE_MODE")
+REPO_GIT_PATH_FUNC(merge_head, "MERGE_HEAD")
+REPO_GIT_PATH_FUNC(merge_autostash, "MERGE_AUTOSTASH")
+REPO_GIT_PATH_FUNC(auto_merge, "AUTO_MERGE")
+REPO_GIT_PATH_FUNC(fetch_head, "FETCH_HEAD")
+REPO_GIT_PATH_FUNC(shallow, "shallow")