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         if (!strcmp(var, "commit.gpgsign")) {
  37                 sign_commit = git_config_bool(var, value) ? "" : NULL;
  38                 return 0;
  39         }
  40         return git_default_config(var, value, cb);
  41 }
  42
  43 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
  44 {
  45         int i, got_tree = 0;
  46         struct commit_list *parents = NULL;
  47         unsigned char tree_sha1[20];
  48         unsigned char commit_sha1[20];
  49         struct strbuf buffer = STRBUF_INIT;
  50
  51         git_config(commit_tree_config, NULL);
  52
  53         if (argc < 2 || !strcmp(argv[1], "-h"))
  54                 usage(commit_tree_usage);
  55
  56         for (i = 1; i < argc; i++) {
  57                 const char *arg = argv[i];
  58                 if (!strcmp(arg, "-p")) {
  59                         unsigned char sha1[20];
  60                         if (argc <= ++i)
  61                                 usage(commit_tree_usage);
  62                         if (get_sha1_commit(argv[i], sha1))
  63                                 die("Not a valid object name %s", argv[i]);
  64                         assert_sha1_type(sha1, OBJ_COMMIT);
  65                         new_parent(lookup_commit(sha1), &parents);
  66                         continue;
  67                 }
  68
  69                 if (skip_prefix(arg, "-S", &sign_commit))
  70                         continue;
  71
  72                 if (!strcmp(arg, "--no-gpg-sign")) {
  73                         sign_commit = NULL;
  74                         continue;
  75                 }
  76
  77                 if (!strcmp(arg, "-m")) {
  78                         if (argc <= ++i)
  79                                 usage(commit_tree_usage);
  80                         if (buffer.len)
  81                                 strbuf_addch(&buffer, '\n');
  82                         strbuf_addstr(&buffer, argv[i]);
  83                         strbuf_complete_line(&buffer);
  84                         continue;
  85                 }
  86
  87                 if (!strcmp(arg, "-F")) {
  88                         int fd;
  89
  90                         if (argc <= ++i)
  91                                 usage(commit_tree_usage);
  92                         if (buffer.len)
  93                                 strbuf_addch(&buffer, '\n');
  94                         if (!strcmp(argv[i], "-"))
  95                                 fd = 0;
  96                         else {
  97                                 fd = open(argv[i], O_RDONLY);
  98                                 if (fd < 0)
  99                                         die_errno("git commit-tree: failed to open '%s'",
 100                                                   argv[i]);
 101                         }
 102                         if (strbuf_read(&buffer, fd, 0) < 0)
 103                                 die_errno("git commit-tree: failed to read '%s'",
 104                                           argv[i]);
 105                         if (fd && close(fd))
 106                                 die_errno("git commit-tree: failed to close '%s'",
 107                                           argv[i]);
 108                         strbuf_complete_line(&buffer);
 109                         continue;
 110                 }
 111
 112                 if (get_sha1_tree(arg, tree_sha1))
 113                         die("Not a valid object name %s", arg);
 114                 if (got_tree)
 115                         die("Cannot give more than one trees");
 116                 got_tree = 1;
 117         }
 118
 119         if (!buffer.len) {
 120                 if (strbuf_read(&buffer, 0, 0) < 0)
 121                         die_errno("git commit-tree: failed to read");
 122         }
 123
 124         if (commit_tree(buffer.buf, buffer.len, tree_sha1, parents,
 125                         commit_sha1, NULL, sign_commit)) {
 126                 strbuf_release(&buffer);
 127                 return 1;
 128         }
 129
 130         printf("%s\n", sha1_to_hex(commit_sha1));
 131         strbuf_release(&buffer);
 132         return 0;
 133 }