Merge branch 'cb/subtree-tests-update'
[git] / 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> <changelog";
14
15 static const char *sign_commit;
16
17 static void new_parent(struct commit *parent, struct commit_list **parents_p)
18 {
19         unsigned char *sha1 = parent->object.sha1;
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", sha1_to_hex(sha1));
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 }