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<signer>] [-m <message>] [-F <file>] <sha1> <changelog";
  14
  15 static void new_parent(struct commit *parent, struct commit_list **parents_p)
  16 {
  17         unsigned char *sha1 = parent->object.sha1;
  18         struct commit_list *parents;
  19         for (parents = *parents_p; parents; parents = parents->next) {
  20                 if (parents->item == parent) {
  21                         error("duplicate parent %s ignored", sha1_to_hex(sha1));
  22                         return;
  23                 }
  24                 parents_p = &parents->next;
  25         }
  26         commit_list_insert(parent, parents_p);
  27 }
  28
  29 static int commit_tree_config(const char *var, const char *value, void *cb)
  30 {
  31         int status = git_gpg_config(var, value, NULL);
  32         if (status)
  33                 return status;
  34         return git_default_config(var, value, cb);
  35 }
  36
  37 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
  38 {
  39         int i, got_tree = 0;
  40         struct commit_list *parents = NULL;
  41         unsigned char tree_sha1[20];
  42         unsigned char commit_sha1[20];
  43         struct strbuf buffer = STRBUF_INIT;
  44         const char *sign_commit = NULL;
  45
  46         git_config(commit_tree_config, NULL);
  47
  48         if (argc < 2 || !strcmp(argv[1], "-h"))
  49                 usage(commit_tree_usage);
  50
  51         if (get_sha1(argv[1], tree_sha1))
  52                 die("Not a valid object name %s", argv[1]);
  53
  54         for (i = 1; i < argc; i++) {
  55                 const char *arg = argv[i];
  56                 if (!strcmp(arg, "-p")) {
  57                         unsigned char sha1[20];
  58                         if (argc <= ++i)
  59                                 usage(commit_tree_usage);
  60                         if (get_sha1(argv[i], sha1))
  61                                 die("Not a valid object name %s", argv[i]);
  62                         assert_sha1_type(sha1, OBJ_COMMIT);
  63                         new_parent(lookup_commit(sha1), &parents);
  64                         continue;
  65                 }
  66
  67                 if (!memcmp(arg, "-S", 2)) {
  68                         sign_commit = arg + 2;
  69                         continue;
  70                 }
  71
  72                 if (!strcmp(arg, "-m")) {
  73                         if (argc <= ++i)
  74                                 usage(commit_tree_usage);
  75                         if (buffer.len)
  76                                 strbuf_addch(&buffer, '\n');
  77                         strbuf_addstr(&buffer, argv[i]);
  78                         strbuf_complete_line(&buffer);
  79                         continue;
  80                 }
  81
  82                 if (!strcmp(arg, "-F")) {
  83                         int fd;
  84
  85                         if (argc <= ++i)
  86                                 usage(commit_tree_usage);
  87                         if (buffer.len)
  88                                 strbuf_addch(&buffer, '\n');
  89                         if (!strcmp(argv[i], "-"))
  90                                 fd = 0;
  91                         else {
  92                                 fd = open(argv[i], O_RDONLY);
  93                                 if (fd < 0)
  94                                         die_errno("git commit-tree: failed to open '%s'",
  95                                                   argv[i]);
  96                         }
  97                         if (strbuf_read(&buffer, fd, 0) < 0)
  98                                 die_errno("git commit-tree: failed to read '%s'",
  99                                           argv[i]);
 100                         if (fd && close(fd))
 101                                 die_errno("git commit-tree: failed to close '%s'",
 102                                           argv[i]);
 103                         strbuf_complete_line(&buffer);
 104                         continue;
 105                 }
 106
 107                 if (get_sha1(arg, tree_sha1))
 108                         die("Not a valid object name %s", arg);
 109                 if (got_tree)
 110                         die("Cannot give more than one trees");
 111                 got_tree = 1;
 112         }
 113
 114         if (!buffer.len) {
 115                 if (strbuf_read(&buffer, 0, 0) < 0)
 116                         die_errno("git commit-tree: failed to read");
 117         }
 118
 119         if (commit_tree(&buffer, tree_sha1, parents, commit_sha1,
 120                         NULL, sign_commit)) {
 121                 strbuf_release(&buffer);
 122                 return 1;
 123         }
 124
 125         printf("%s\n", sha1_to_hex(commit_sha1));
 126         strbuf_release(&buffer);
 127         return 0;
 128 }