git-format-patch should show the correct version

[git.git] / cat-file.c

diff --git a/cat-file.c b/cat-file.c
index 74a0a23..96d66b4 100644 (file)
--- a/cat-file.c
+++ b/cat-file.c
@@ -1,3 +1,8 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
 #include "cache.h"
 
 int main(int argc, char **argv)
@@ -6,18 +11,61 @@ int main(int argc, char **argv)
        char type[20];
        void *buf;
        unsigned long size;
-       char template[] = "temp_git_file_XXXXXX";
-       int fd;
+       int opt;
+
+       setup_git_directory();
+       if (argc != 3 || get_sha1(argv[2], sha1))
+               usage("git-cat-file [-t|-s|-e|<type>] <sha1>");
+
+       opt = 0;
+       if ( argv[1][0] == '-' ) {
+               opt = argv[1][1];
+               if ( !opt || argv[1][2] )
+                       opt = -1; /* Not a single character option */
+       }
+
+       buf = NULL;
+       switch (opt) {
+       case 't':
+               if (!sha1_object_info(sha1, type, NULL)) {
+                       printf("%s\n", type);
+                       return 0;
+               }
+               break;
+
+       case 's':
+               if (!sha1_object_info(sha1, type, &size)) {
+                       printf("%lu\n", size);
+                       return 0;
+               }
+               break;
+
+       case 'e':
+               return !has_sha1_file(sha1);
+
+       case 0:
+               buf = read_object_with_reference(sha1, argv[1], &size, NULL);
+               break;
+
+       default:
+               die("git-cat-file: unknown option: %s\n", argv[1]);
+       }
 
-       if (argc != 2 || get_sha1_hex(argv[1], sha1))
-               usage("cat-file: cat-file <sha1>");
-       buf = read_sha1_file(sha1, type, &size);
        if (!buf)
-               exit(1);
-       fd = mkstemp(template);
-       if (fd < 0)
-               usage("unable to create tempfile");
-       if (write(fd, buf, size) != size)
-               strcpy(type, "bad");
-       printf("%s: %s\n", template, type);
+               die("git-cat-file %s: bad file", argv[2]);
+
+       while (size > 0) {
+               long ret = xwrite(1, buf, size);
+               if (ret < 0) {
+                       /* Ignore epipe */
+                       if (errno == EPIPE)
+                               break;
+                       die("git-cat-file: %s", strerror(errno));
+               } else if (!ret) {
+                       die("git-cat-file: disk full?");
+               }
+               size -= ret;
+               buf += ret;
+       }
+       return 0;
 }