mirror of
https://github.com/git/git.git
synced 2024-11-18 22:53:55 +01:00
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#define BLOCKING (1ul << 14)
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/*
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* FIXME! Share the code with "write-tree.c"
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*/
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static void init_buffer(char **bufp, unsigned int *sizep)
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{
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char *buf = xmalloc(BLOCKING);
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*sizep = 0;
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*bufp = buf;
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}
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static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
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{
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char one_line[2048];
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va_list args;
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int len;
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unsigned long alloc, size, newsize;
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char *buf;
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va_start(args, fmt);
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len = vsnprintf(one_line, sizeof(one_line), fmt, args);
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va_end(args);
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size = *sizep;
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newsize = size + len;
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alloc = (size + 32767) & ~32767;
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buf = *bufp;
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if (newsize > alloc) {
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alloc = (newsize + 32767) & ~32767;
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buf = xrealloc(buf, alloc);
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*bufp = buf;
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}
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*sizep = newsize;
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memcpy(buf + size, one_line, len);
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}
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static void check_valid(unsigned char *sha1, const char *expect)
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{
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void *buf;
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char type[20];
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unsigned long size;
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buf = read_sha1_file(sha1, type, &size);
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if (!buf || strcmp(type, expect))
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die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
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free(buf);
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}
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/*
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* Having more than two parents is not strange at all, and this is
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* how multi-way merges are represented.
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*/
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#define MAXPARENT (16)
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static unsigned char parent_sha1[MAXPARENT][20];
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static const char commit_tree_usage[] = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
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static int new_parent(int idx)
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{
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int i;
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unsigned char *sha1 = parent_sha1[idx];
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for (i = 0; i < idx; i++) {
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if (!memcmp(parent_sha1[i], sha1, 20)) {
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error("duplicate parent %s ignored", sha1_to_hex(sha1));
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return 0;
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}
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}
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return 1;
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}
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int main(int argc, char **argv)
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{
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int i;
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int parents = 0;
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unsigned char tree_sha1[20];
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unsigned char commit_sha1[20];
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char comment[1000];
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char *buffer;
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unsigned int size;
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setup_ident();
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setup_git_directory();
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git_config(git_default_config);
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if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
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usage(commit_tree_usage);
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check_valid(tree_sha1, "tree");
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for (i = 2; i < argc; i += 2) {
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char *a, *b;
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a = argv[i]; b = argv[i+1];
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if (!b || strcmp(a, "-p") || get_sha1(b, parent_sha1[parents]))
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usage(commit_tree_usage);
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check_valid(parent_sha1[parents], "commit");
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if (new_parent(parents))
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parents++;
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}
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if (!parents)
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fprintf(stderr, "Committing initial tree %s\n", argv[1]);
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init_buffer(&buffer, &size);
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add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
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/*
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* NOTE! This ordering means that the same exact tree merged with a
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* different order of parents will be a _different_ changeset even
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* if everything else stays the same.
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*/
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for (i = 0; i < parents; i++)
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add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
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/* Person/date information */
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add_buffer(&buffer, &size, "author %s\n", git_author_info(1));
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add_buffer(&buffer, &size, "committer %s\n\n", git_committer_info(1));
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/* And add the comment */
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while (fgets(comment, sizeof(comment), stdin) != NULL)
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add_buffer(&buffer, &size, "%s", comment);
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if (!write_sha1_file(buffer, size, "commit", commit_sha1)) {
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printf("%s\n", sha1_to_hex(commit_sha1));
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return 0;
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}
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else
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return 1;
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}
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