builtin/commit-tree.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "commit.h"
   8 #include "tree.h"
   9 #include "builtin.h"
  10 #include "utf8.h"
  11 #include "gpg-interface.h"
  12
  13 static const char commit_tree_usage[] = "git commit-tree [(-p <sha1>)...] [-S[<keyid>]] [-m <message>] [-F <file>] <sha1>";
  14
  15 static const char *sign_commit;
  16
  17 static void new_parent(struct commit *parent, struct commit_list **parents_p)
  18 {
  19         struct object_id *oid = &parent->object.oid;
  20         struct commit_list *parents;
  21         for (parents = *parents_p; parents; parents = parents->next) {
  22                 if (parents->item == parent) {
  23                         error("duplicate parent %s ignored", oid_to_hex(oid));
  24                         return;
  25                 }
  26                 parents_p = &parents->next;
  27         }
  28         commit_list_insert(parent, parents_p);
  29 }
  30
  31 static int commit_tree_config(const char *var, const char *value, void *cb)
  32 {
  33         int status = git_gpg_config(var, value, NULL);
  34         if (status)
  35                 return status;
  36         return git_default_config(var, value, cb);
  37 }
  38
  39 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
  40 {
  41         int i, got_tree = 0;
  42         struct commit_list *parents = NULL;
  43         struct object_id tree_oid;
  44         struct object_id commit_oid;
  45         struct strbuf buffer = STRBUF_INIT;
  46
  47         git_config(commit_tree_config, NULL);
  48
  49         if (argc < 2 || !strcmp(argv[1], "-h"))
  50                 usage(commit_tree_usage);
  51
  52         for (i = 1; i < argc; i++) {
  53                 const char *arg = argv[i];
  54                 if (!strcmp(arg, "-p")) {
  55                         struct object_id oid;
  56                         if (argc <= ++i)
  57                                 usage(commit_tree_usage);
  58                         if (get_sha1_commit(argv[i], oid.hash))
  59                                 die("Not a valid object name %s", argv[i]);
  60                         assert_sha1_type(oid.hash, OBJ_COMMIT);
  61                         new_parent(lookup_commit(oid.hash), &parents);
  62                         continue;
  63                 }
  64
  65                 if (skip_prefix(arg, "-S", &sign_commit))
  66                         continue;
  67
  68                 if (!strcmp(arg, "--no-gpg-sign")) {
  69                         sign_commit = NULL;
  70                         continue;
  71                 }
  72
  73                 if (!strcmp(arg, "-m")) {
  74                         if (argc <= ++i)
  75                                 usage(commit_tree_usage);
  76                         if (buffer.len)
  77                                 strbuf_addch(&buffer, '\n');
  78                         strbuf_addstr(&buffer, argv[i]);
  79                         strbuf_complete_line(&buffer);
  80                         continue;
  81                 }
  82
  83                 if (!strcmp(arg, "-F")) {
  84                         int fd;
  85
  86                         if (argc <= ++i)
  87                                 usage(commit_tree_usage);
  88                         if (buffer.len)
  89                                 strbuf_addch(&buffer, '\n');
  90                         if (!strcmp(argv[i], "-"))
  91                                 fd = 0;
  92                         else {
  93                                 fd = open(argv[i], O_RDONLY);
  94                                 if (fd < 0)
  95                                         die_errno("git commit-tree: failed to open '%s'",
  96                                                   argv[i]);
  97                         }
  98                         if (strbuf_read(&buffer, fd, 0) < 0)
  99                                 die_errno("git commit-tree: failed to read '%s'",
 100                                           argv[i]);
 101                         if (fd && close(fd))
 102                                 die_errno("git commit-tree: failed to close '%s'",
 103                                           argv[i]);
 104                         strbuf_complete_line(&buffer);
 105                         continue;
 106                 }
 107
 108                 if (get_sha1_tree(arg, tree_oid.hash))
 109                         die("Not a valid object name %s", arg);
 110                 if (got_tree)
 111                         die("Cannot give more than one trees");
 112                 got_tree = 1;
 113         }
 114
 115         if (!buffer.len) {
 116                 if (strbuf_read(&buffer, 0, 0) < 0)
 117                         die_errno("git commit-tree: failed to read");
 118         }
 119
 120         if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
 121                         commit_oid.hash, NULL, sign_commit)) {
 122                 strbuf_release(&buffer);
 123                 return 1;
 124         }
 125
 126         printf("%s\n", oid_to_hex(&commit_oid));
 127         strbuf_release(&buffer);
 128         return 0;
 129 }