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git/builtin/commit-tree.c
Jeff King 3ffefb54c0 commit_tree: take a pointer/len pair rather than a const strbuf
While strbufs are pretty common throughout our code, it is
more flexible for functions to take a pointer/len pair than
a strbuf. It's easy to turn a strbuf into such a pair (by
dereferencing its members), but less easy to go the other
way (you can strbuf_attach, but that has implications about
memory ownership).

This patch teaches commit_tree (and its associated callers
and sub-functions) to take such a pair for the commit
message rather than a strbuf.  This makes passing the buffer
around slightly more verbose, but means we can get rid of
some dangerous strbuf_attach calls in the next patch.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-12 10:29:41 -07:00

135 lines
3.2 KiB
C

/*
* 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"
#include "gpg-interface.h"
static const char commit_tree_usage[] = "git commit-tree [(-p <sha1>)...] [-S[<keyid>]] [-m <message>] [-F <file>] <sha1> <changelog";
static const char *sign_commit;
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));
return;
}
parents_p = &parents->next;
}
commit_list_insert(parent, parents_p);
}
static int commit_tree_config(const char *var, const char *value, void *cb)
{
int status = git_gpg_config(var, value, NULL);
if (status)
return status;
if (!strcmp(var, "commit.gpgsign")) {
sign_commit = git_config_bool(var, value) ? "" : NULL;
return 0;
}
return git_default_config(var, value, cb);
}
int cmd_commit_tree(int argc, const char **argv, const char *prefix)
{
int i, got_tree = 0;
struct commit_list *parents = NULL;
unsigned char tree_sha1[20];
unsigned char commit_sha1[20];
struct strbuf buffer = STRBUF_INIT;
git_config(commit_tree_config, NULL);
if (argc < 2 || !strcmp(argv[1], "-h"))
usage(commit_tree_usage);
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "-p")) {
unsigned char sha1[20];
if (argc <= ++i)
usage(commit_tree_usage);
if (get_sha1_commit(argv[i], sha1))
die("Not a valid object name %s", argv[i]);
assert_sha1_type(sha1, OBJ_COMMIT);
new_parent(lookup_commit(sha1), &parents);
continue;
}
if (!memcmp(arg, "-S", 2)) {
sign_commit = arg + 2;
continue;
}
if (!strcmp(arg, "--no-gpg-sign")) {
sign_commit = NULL;
continue;
}
if (!strcmp(arg, "-m")) {
if (argc <= ++i)
usage(commit_tree_usage);
if (buffer.len)
strbuf_addch(&buffer, '\n');
strbuf_addstr(&buffer, argv[i]);
strbuf_complete_line(&buffer);
continue;
}
if (!strcmp(arg, "-F")) {
int fd;
if (argc <= ++i)
usage(commit_tree_usage);
if (buffer.len)
strbuf_addch(&buffer, '\n');
if (!strcmp(argv[i], "-"))
fd = 0;
else {
fd = open(argv[i], O_RDONLY);
if (fd < 0)
die_errno("git commit-tree: failed to open '%s'",
argv[i]);
}
if (strbuf_read(&buffer, fd, 0) < 0)
die_errno("git commit-tree: failed to read '%s'",
argv[i]);
if (fd && close(fd))
die_errno("git commit-tree: failed to close '%s'",
argv[i]);
strbuf_complete_line(&buffer);
continue;
}
if (get_sha1_tree(arg, tree_sha1))
die("Not a valid object name %s", arg);
if (got_tree)
die("Cannot give more than one trees");
got_tree = 1;
}
if (!buffer.len) {
if (strbuf_read(&buffer, 0, 0) < 0)
die_errno("git commit-tree: failed to read");
}
if (commit_tree(buffer.buf, buffer.len, tree_sha1, parents,
commit_sha1, NULL, sign_commit)) {
strbuf_release(&buffer);
return 1;
}
printf("%s\n", sha1_to_hex(commit_sha1));
strbuf_release(&buffer);
return 0;
}