git-p4: chdir now properly sets PWD environment variable in msysGit
[git/git-p4.git] / builtin-commit-tree.c
blob7a9a309be0543da7d27e7710ef82271f2582e0a9
1 /*
2 * GIT - The information manager from hell
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"
12 #define BLOCKING (1ul << 14)
15 * FIXME! Share the code with "write-tree.c"
17 static void check_valid(unsigned char *sha1, enum object_type expect)
19 enum object_type type = sha1_object_info(sha1, NULL);
20 if (type < 0)
21 die("%s is not a valid object", sha1_to_hex(sha1));
22 if (type != expect)
23 die("%s is not a valid '%s' object", sha1_to_hex(sha1),
24 typename(expect));
27 static const char commit_tree_usage[] = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
29 static void new_parent(struct commit *parent, struct commit_list **parents_p)
31 unsigned char *sha1 = parent->object.sha1;
32 struct commit_list *parents;
33 for (parents = *parents_p; parents; parents = parents->next) {
34 if (parents->item == parent) {
35 error("duplicate parent %s ignored", sha1_to_hex(sha1));
36 return;
38 parents_p = &parents->next;
40 commit_list_insert(parent, parents_p);
43 static const char commit_utf8_warn[] =
44 "Warning: commit message does not conform to UTF-8.\n"
45 "You may want to amend it after fixing the message, or set the config\n"
46 "variable i18n.commitencoding to the encoding your project uses.\n";
48 int commit_tree(const char *msg, unsigned char *tree,
49 struct commit_list *parents, unsigned char *ret)
51 int encoding_is_utf8;
52 struct strbuf buffer;
54 check_valid(tree, OBJ_TREE);
56 /* Not having i18n.commitencoding is the same as having utf-8 */
57 encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
59 strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
60 strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
63 * NOTE! This ordering means that the same exact tree merged with a
64 * different order of parents will be a _different_ changeset even
65 * if everything else stays the same.
67 while (parents) {
68 struct commit_list *next = parents->next;
69 strbuf_addf(&buffer, "parent %s\n",
70 sha1_to_hex(parents->item->object.sha1));
71 free(parents);
72 parents = next;
75 /* Person/date information */
76 strbuf_addf(&buffer, "author %s\n", git_author_info(IDENT_ERROR_ON_NO_NAME));
77 strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_ERROR_ON_NO_NAME));
78 if (!encoding_is_utf8)
79 strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding);
80 strbuf_addch(&buffer, '\n');
82 /* And add the comment */
83 strbuf_addstr(&buffer, msg);
85 /* And check the encoding */
86 if (encoding_is_utf8 && !is_utf8(buffer.buf))
87 fprintf(stderr, commit_utf8_warn);
89 return write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
92 int cmd_commit_tree(int argc, const char **argv, const char *prefix)
94 int i;
95 struct commit_list *parents = NULL;
96 unsigned char tree_sha1[20];
97 unsigned char commit_sha1[20];
98 struct strbuf buffer = STRBUF_INIT;
100 git_config(git_default_config, NULL);
102 if (argc < 2)
103 usage(commit_tree_usage);
104 if (get_sha1(argv[1], tree_sha1))
105 die("Not a valid object name %s", argv[1]);
107 for (i = 2; i < argc; i += 2) {
108 unsigned char sha1[20];
109 const char *a, *b;
110 a = argv[i]; b = argv[i+1];
111 if (!b || strcmp(a, "-p"))
112 usage(commit_tree_usage);
114 if (get_sha1(b, sha1))
115 die("Not a valid object name %s", b);
116 check_valid(sha1, OBJ_COMMIT);
117 new_parent(lookup_commit(sha1), &parents);
120 if (strbuf_read(&buffer, 0, 0) < 0)
121 die("git-commit-tree: read returned %s", strerror(errno));
123 if (!commit_tree(buffer.buf, tree_sha1, parents, commit_sha1)) {
124 printf("%s\n", sha1_to_hex(commit_sha1));
125 return 0;
127 else
128 return 1;