help: check early if we have a command, if not try a documentation topic

diff --git a/archive-tar.c b/archive-tar.c
index e1bced56093dc08bbc260736637af3356b8598bb..99db58f1cf21ee30f150c54acd6ffefbb14b6f57 100644 (file)
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -17,6 +17,7 @@ static time_t archive_time;
 static int tar_umask = 002;
 static int verbose;
 static const struct commit *commit;
+static size_t base_len;
 
 /* writes out the whole block, but only if it is full */
 static void write_if_needed(void)
@@ -219,10 +220,10 @@ static void write_global_extended_header(const unsigned char *sha1)
        strbuf_release(&ext_header);
 }
 
-static int git_tar_config(const char *var, const char *value)
+static int git_tar_config(const char *var, const char *value, void *cb)
 {
        if (!strcmp(var, "tar.umask")) {
-               if (!strcmp(value, "user")) {
+               if (value && !strcmp(value, "user")) {
                        tar_umask = umask(0);
                        umask(tar_umask);
                } else {
@@ -230,7 +231,7 @@ static int git_tar_config(const char *var, const char *value)
                }
                return 0;
        }
-       return git_default_config(var, value);
+       return git_default_config(var, value, cb);
 }
 
 static int write_tar_entry(const unsigned char *sha1,
@@ -246,13 +247,15 @@ static int write_tar_entry(const unsigned char *sha1,
        strbuf_grow(&path, PATH_MAX);
        strbuf_add(&path, base, baselen);
        strbuf_addstr(&path, filename);
+       if (is_archive_path_ignored(path.buf + base_len))
+               return 0;
        if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
                strbuf_addch(&path, '/');
                buffer = NULL;
                size = 0;
        } else {
-               buffer = sha1_file_to_archive(path.buf, sha1, mode, &type,
-                                             &size, commit);
+               buffer = sha1_file_to_archive(path.buf + base_len, sha1, mode,
+                               &type, &size, commit);
                if (!buffer)
                        die("cannot read %s", sha1_to_hex(sha1));
        }
@@ -267,11 +270,12 @@ int write_tar_archive(struct archiver_args *args)
 {
        int plen = args->base ? strlen(args->base) : 0;
 
-       git_config(git_tar_config);
+       git_config(git_tar_config, NULL);
 
        archive_time = args->time;
        verbose = args->verbose;
        commit = args->commit;
+       base_len = args->base ? strlen(args->base) : 0;
 
        if (args->commit_sha1)
                write_global_extended_header(args->commit_sha1);