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a89fccd281
Introduces global inline: hashcmp(const unsigned char *sha1, const unsigned char *sha2) Uses memcmp for comparison and returns the result based on the length of the hash name (a future runtime decision). Acked-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
139 lines
3.3 KiB
C
139 lines
3.3 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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#include "commit.h"
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#include "tree.h"
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#include "builtin.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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char type[20];
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if (sha1_object_info(sha1, type, NULL))
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die("%s is not a valid object", sha1_to_hex(sha1));
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if (expect && strcmp(type, expect))
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die("%s is not a valid '%s' object", sha1_to_hex(sha1),
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expect);
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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 (!hashcmp(parent_sha1[i], sha1)) {
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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 cmd_commit_tree(int argc, const char **argv, const char *prefix)
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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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git_config(git_default_config);
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if (argc < 2)
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usage(commit_tree_usage);
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if (get_sha1(argv[1], tree_sha1))
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die("Not a valid object name %s", argv[1]);
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check_valid(tree_sha1, tree_type);
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for (i = 2; i < argc; i += 2) {
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const char *a, *b;
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a = argv[i]; b = argv[i+1];
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if (!b || strcmp(a, "-p"))
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usage(commit_tree_usage);
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if (get_sha1(b, parent_sha1[parents]))
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die("Not a valid object name %s", b);
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check_valid(parent_sha1[parents], commit_type);
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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_type, 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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