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 "config.h"
   8 #include "commit.h"
   9 #include "tree.h"
  10 #include "builtin.h"
  11 #include "utf8.h"
  12 #include "gpg-interface.h"
  13
  14 static const char commit_tree_usage[] = "git commit-tree [(-p <sha1>)...] [-S[<keyid>]] [-m <message>] [-F <file>] <sha1>";
  15
  16 static const char *sign_commit;
  17
  18 static void new_parent(struct commit *parent, struct commit_list **parents_p)
  19 {
  20         struct object_id *oid = &parent->object.oid;
  21         struct commit_list *parents;
  22         for (parents = *parents_p; parents; parents = parents->next) {
  23                 if (parents->item == parent) {
  24                         error("duplicate parent %s ignored", oid_to_hex(oid));
  25                         return;
  26                 }
  27                 parents_p = &parents->next;
  28         }
  29         commit_list_insert(parent, parents_p);
  30 }
  31
  32 static int commit_tree_config(const char *var, const char *value, void *cb)
  33 {
  34         int status = git_gpg_config(var, value, NULL);
  35         if (status)
  36                 return status;
  37         return git_default_config(var, value, cb);
  38 }
  39
  40 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
  41 {
  42         int i, got_tree = 0;
  43         struct commit_list *parents = NULL;
  44         struct object_id tree_oid;
  45         struct object_id commit_oid;
  46         struct strbuf buffer = STRBUF_INIT;
  47
  48         git_config(commit_tree_config, NULL);
  49
  50         if (argc < 2 || !strcmp(argv[1], "-h"))
  51                 usage(commit_tree_usage);
  52
  53         for (i = 1; i < argc; i++) {
  54                 const char *arg = argv[i];
  55                 if (!strcmp(arg, "-p")) {
  56                         struct object_id oid;
  57                         if (argc <= ++i)
  58                                 usage(commit_tree_usage);
  59                         if (get_sha1_commit(argv[i], oid.hash))
  60                                 die("Not a valid object name %s", argv[i]);
  61                         assert_sha1_type(oid.hash, OBJ_COMMIT);
  62                         new_parent(lookup_commit(&oid), &parents);
  63                         continue;
  64                 }
  65
  66                 if (skip_prefix(arg, "-S", &sign_commit))
  67                         continue;
  68
  69                 if (!strcmp(arg, "--no-gpg-sign")) {
  70                         sign_commit = NULL;
  71                         continue;
  72                 }
  73
  74                 if (!strcmp(arg, "-m")) {
  75                         if (argc <= ++i)
  76                                 usage(commit_tree_usage);
  77                         if (buffer.len)
  78                                 strbuf_addch(&buffer, '\n');
  79                         strbuf_addstr(&buffer, argv[i]);
  80                         strbuf_complete_line(&buffer);
  81                         continue;
  82                 }
  83
  84                 if (!strcmp(arg, "-F")) {
  85                         int fd;
  86
  87                         if (argc <= ++i)
  88                                 usage(commit_tree_usage);
  89                         if (buffer.len)
  90                                 strbuf_addch(&buffer, '\n');
  91                         if (!strcmp(argv[i], "-"))
  92                                 fd = 0;
  93                         else {
  94                                 fd = open(argv[i], O_RDONLY);
  95                                 if (fd < 0)
  96                                         die_errno("git commit-tree: failed to open '%s'",
  97                                                   argv[i]);
  98                         }
  99                         if (strbuf_read(&buffer, fd, 0) < 0)
 100                                 die_errno("git commit-tree: failed to read '%s'",
 101                                           argv[i]);
 102                         if (fd && close(fd))
 103                                 die_errno("git commit-tree: failed to close '%s'",
 104                                           argv[i]);
 105                         strbuf_complete_line(&buffer);
 106                         continue;
 107                 }
 108
 109                 if (get_sha1_tree(arg, tree_oid.hash))
 110                         die("Not a valid object name %s", arg);
 111                 if (got_tree)
 112                         die("Cannot give more than one trees");
 113                 got_tree = 1;
 114         }
 115
 116         if (!buffer.len) {
 117                 if (strbuf_read(&buffer, 0, 0) < 0)
 118                         die_errno("git commit-tree: failed to read");
 119         }
 120
 121         if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
 122                         commit_oid.hash, NULL, sign_commit)) {
 123                 strbuf_release(&buffer);
 124                 return 1;
 125         }
 126
 127         printf("%s\n", oid_to_hex(&commit_oid));
 128         strbuf_release(&buffer);
 129         return 0;
 130 }