worktree: introduce "add" command

diff --git a/refs.c b/refs.c
index 0368ed461f3ef913a60da322247bca0f9d121a82..5ed991bd92856bc8b2c5978923a118b8122a6eb5 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1351,7 +1351,7 @@ static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
 {
        int fd, len;
        char buffer[128], *p;
-       char *path;
+       const char *path;
 
        if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN)
                return -1;
@@ -1444,7 +1444,11 @@ static int resolve_missing_loose_ref(const char *refname,
 }
 
 /* This function needs to return a meaningful errno on failure */
-const char *resolve_ref_unsafe(const char *refname, int resolve_flags, unsigned char *sha1, int *flags)
+static const char *resolve_ref_unsafe_1(const char *refname,
+                                       int resolve_flags,
+                                       unsigned char *sha1,
+                                       int *flags,
+                                       struct strbuf *sb_path)
 {
        int depth = MAXDEPTH;
        ssize_t len;
@@ -1475,7 +1479,7 @@ const char *resolve_ref_unsafe(const char *refname, int resolve_flags, unsigned
                bad_name = 1;
        }
        for (;;) {
-               char path[PATH_MAX];
+               const char *path;
                struct stat st;
                char *buf;
                int fd;
@@ -1485,7 +1489,9 @@ const char *resolve_ref_unsafe(const char *refname, int resolve_flags, unsigned
                        return NULL;
                }
 
-               git_snpath(path, sizeof(path), "%s", refname);
+               strbuf_reset(sb_path);
+               strbuf_git_path(sb_path, "%s", refname);
+               path = sb_path->buf;
 
                /*
                 * We might have to loop back here to avoid a race
@@ -1612,6 +1618,16 @@ const char *resolve_ref_unsafe(const char *refname, int resolve_flags, unsigned
        }
 }
 
+const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
+                              unsigned char *sha1, int *flags)
+{
+       struct strbuf sb_path = STRBUF_INIT;
+       const char *ret = resolve_ref_unsafe_1(refname, resolve_flags,
+                                              sha1, flags, &sb_path);
+       strbuf_release(&sb_path);
+       return ret;
+}
+
 char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags)
 {
        const char *ret = resolve_ref_unsafe(ref, resolve_flags, sha1, flags);
@@ -2229,7 +2245,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
                                            const struct string_list *skip,
                                            int flags, int *type_p)
 {
-       char *ref_file;
+       const char *ref_file;
        const char *orig_refname = refname;
        struct ref_lock *lock;
        int last_errno = 0;
@@ -2303,7 +2319,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
                lock->force_write = 1;
 
  retry:
-       switch (safe_create_leading_directories(ref_file)) {
+       switch (safe_create_leading_directories_const(ref_file)) {
        case SCLD_OK:
                break; /* success */
        case SCLD_VANISHED:
@@ -2743,7 +2759,7 @@ static int rename_tmp_log(const char *newrefname)
        int attempts_remaining = 4;
 
  retry:
-       switch (safe_create_leading_directories(git_path("logs/%s", newrefname))) {
+       switch (safe_create_leading_directories_const(git_path("logs/%s", newrefname))) {
        case SCLD_OK:
                break; /* success */
        case SCLD_VANISHED:
@@ -2941,11 +2957,15 @@ static int copy_msg(char *buf, const char *msg)
 }
 
 /* This function must set a meaningful errno on failure */
-int log_ref_setup(const char *refname, char *logfile, int bufsize)
+int log_ref_setup(const char *refname, struct strbuf *sb_logfile)
 {
        int logfd, oflags = O_APPEND | O_WRONLY;
+       char *logfile;
 
-       git_snpath(logfile, bufsize, "logs/%s", refname);
+       strbuf_git_path(sb_logfile, "logs/%s", refname);
+       logfile = sb_logfile->buf;
+       /* make sure the rest of the function can't change "logfile" */
+       sb_logfile = NULL;
        if (log_all_ref_updates &&
            (starts_with(refname, "refs/heads/") ||
             starts_with(refname, "refs/remotes/") ||
@@ -2962,10 +2982,10 @@ int log_ref_setup(const char *refname, char *logfile, int bufsize)
 
        logfd = open(logfile, oflags, 0666);
        if (logfd < 0) {
-               if (!(oflags & O_CREAT) && errno == ENOENT)
+               if (!(oflags & O_CREAT) && (errno == ENOENT || errno == EISDIR))
                        return 0;
 
-               if ((oflags & O_CREAT) && errno == EISDIR) {
+               if (errno == EISDIR) {
                        if (remove_empty_directories(logfile)) {
                                int save_errno = errno;
                                error("There are still logs under '%s'",
@@ -2990,22 +3010,26 @@ int log_ref_setup(const char *refname, char *logfile, int bufsize)
        return 0;
 }
 
-static int log_ref_write(const char *refname, const unsigned char *old_sha1,
-                        const unsigned char *new_sha1, const char *msg)
+static int log_ref_write_1(const char *refname, const unsigned char *old_sha1,
+                          const unsigned char *new_sha1, const char *msg,
+                          struct strbuf *sb_log_file)
 {
        int logfd, result, written, oflags = O_APPEND | O_WRONLY;
        unsigned maxlen, len;
        int msglen;
-       char log_file[PATH_MAX];
+       const char *log_file;
        char *logrec;
        const char *committer;
 
        if (log_all_ref_updates < 0)
                log_all_ref_updates = !is_bare_repository();
 
-       result = log_ref_setup(refname, log_file, sizeof(log_file));
+       result = log_ref_setup(refname, sb_log_file);
        if (result)
                return result;
+       log_file = sb_log_file->buf;
+       /* make sure the rest of the function can't change "log_file" */
+       sb_log_file = NULL;
 
        logfd = open(log_file, oflags);
        if (logfd < 0)
@@ -3038,6 +3062,15 @@ static int log_ref_write(const char *refname, const unsigned char *old_sha1,
        return 0;
 }
 
+static int log_ref_write(const char *refname, const unsigned char *old_sha1,
+                        const unsigned char *new_sha1, const char *msg)
+{
+       struct strbuf sb = STRBUF_INIT;
+       int ret = log_ref_write_1(refname, old_sha1, new_sha1, msg, &sb);
+       strbuf_release(&sb);
+       return ret;
+}
+
 int is_branch(const char *refname)
 {
        return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");