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* GIT - The information manager from hell
* Copyright (C) Linus Torvalds, 2005
#include "cache.h"
#include "commit.h"
#include "tree.h"
#include "builtin.h"
#include "utf8.h"
#define BLOCKING (1ul << 14)
* FIXME! Share the code with "write-tree.c"
static void check_valid(unsigned char *sha1, enum object_type expect)
enum object_type type = sha1_object_info(sha1, NULL);
if (type < 0)
die("%s is not a valid object", sha1_to_hex(sha1));
if (type != expect)
die("%s is not a valid '%s' object", sha1_to_hex(sha1),
static const char commit_tree_usage[] = "git commit-tree <sha1> [-p <sha1>]* < changelog";
static void new_parent(struct commit *parent, struct commit_list **parents_p)
unsigned char *sha1 = parent->object.sha1;
struct commit_list *parents;
for (parents = *parents_p; parents; parents = parents->next) {
if (parents->item == parent) {
error("duplicate parent %s ignored", sha1_to_hex(sha1));
parents_p = &parents->next;
commit_list_insert(parent, parents_p);
static const char commit_utf8_warn[] =
"Warning: commit message does not conform to UTF-8.\n"
"You may want to amend it after fixing the message, or set the config\n"
"variable i18n.commitencoding to the encoding your project uses.\n";
int commit_tree(const char *msg, unsigned char *tree,
struct commit_list *parents, unsigned char *ret,
const char *author)
int result;
int encoding_is_utf8;
struct strbuf buffer;
check_valid(tree, OBJ_TREE);
/* Not having i18n.commitencoding is the same as having utf-8 */
encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
* NOTE! This ordering means that the same exact tree merged with a
* different order of parents will be a _different_ changeset even
* if everything else stays the same.
while (parents) {
struct commit_list *next = parents->next;
strbuf_addf(&buffer, "parent %s\n",
parents = next;
/* Person/date information */
if (!author)
author = git_author_info(IDENT_ERROR_ON_NO_NAME);
strbuf_addf(&buffer, "author %s\n", author);
strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_ERROR_ON_NO_NAME));
if (!encoding_is_utf8)
strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding);
strbuf_addch(&buffer, '\n');
/* And add the comment */
strbuf_addstr(&buffer, msg);
/* And check the encoding */
if (encoding_is_utf8 && !is_utf8(buffer.buf))
fprintf(stderr, commit_utf8_warn);
result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
return result;
int cmd_commit_tree(int argc, const char **argv, const char *prefix)
int i;
struct commit_list *parents = NULL;
unsigned char tree_sha1[20];
unsigned char commit_sha1[20];
struct strbuf buffer = STRBUF_INIT;
git_config(git_default_config, NULL);
if (argc < 2)
if (get_sha1(argv[1], tree_sha1))
die("Not a valid object name %s", argv[1]);
for (i = 2; i < argc; i += 2) {
unsigned char sha1[20];
const char *a, *b;
a = argv[i]; b = argv[i+1];
if (!b || strcmp(a, "-p"))
if (get_sha1(b, sha1))
die("Not a valid object name %s", b);
check_valid(sha1, OBJ_COMMIT);
new_parent(lookup_commit(sha1), &parents);
if (strbuf_read(&buffer, 0, 0) < 0)
die("git commit-tree: read returned %s", strerror(errno));
if (!commit_tree(buffer.buf, tree_sha1, parents, commit_sha1, NULL)) {
printf("%s\n", sha1_to_hex(commit_sha1));
return 0;
return 1;