git/reset.c
Elijah Newren eea0e59ffb treewide: remove unnecessary includes in source files
Each of these were checked with
   gcc -E -I. ${SOURCE_FILE} | grep ${HEADER_FILE}
to ensure that removing the direct inclusion of the header actually
resulted in that header no longer being included at all (i.e. that
no other header pulled it in transitively).

...except for a few cases where we verified that although the header
was brought in transitively, nothing from it was directly used in
that source file.  These cases were:
  * builtin/credential-cache.c
  * builtin/pull.c
  * builtin/send-pack.c

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-12-26 12:04:31 -08:00

178 lines
5.3 KiB
C

#include "git-compat-util.h"
#include "cache-tree.h"
#include "gettext.h"
#include "hex.h"
#include "lockfile.h"
#include "object-name.h"
#include "refs.h"
#include "reset.h"
#include "tree-walk.h"
#include "tree.h"
#include "unpack-trees.h"
#include "hook.h"
static int update_refs(const struct reset_head_opts *opts,
const struct object_id *oid,
const struct object_id *head)
{
unsigned detach_head = opts->flags & RESET_HEAD_DETACH;
unsigned run_hook = opts->flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
unsigned update_orig_head = opts->flags & RESET_ORIG_HEAD;
const struct object_id *orig_head = opts->orig_head;
const char *switch_to_branch = opts->branch;
const char *reflog_branch = opts->branch_msg;
const char *reflog_head = opts->head_msg;
const char *reflog_orig_head = opts->orig_head_msg;
const char *default_reflog_action = opts->default_reflog_action;
struct object_id *old_orig = NULL, oid_old_orig;
struct strbuf msg = STRBUF_INIT;
const char *reflog_action;
size_t prefix_len;
int ret;
if ((update_orig_head && !reflog_orig_head) || !reflog_head) {
if (!default_reflog_action)
BUG("default_reflog_action must be given when reflog messages are omitted");
reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action :
default_reflog_action);
}
prefix_len = msg.len;
if (update_orig_head) {
if (!repo_get_oid(the_repository, "ORIG_HEAD", &oid_old_orig))
old_orig = &oid_old_orig;
if (head) {
if (!reflog_orig_head) {
strbuf_addstr(&msg, "updating ORIG_HEAD");
reflog_orig_head = msg.buf;
}
update_ref(reflog_orig_head, "ORIG_HEAD",
orig_head ? orig_head : head,
old_orig, 0, UPDATE_REFS_MSG_ON_ERR);
} else if (old_orig)
delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
}
if (!reflog_head) {
strbuf_setlen(&msg, prefix_len);
strbuf_addstr(&msg, "updating HEAD");
reflog_head = msg.buf;
}
if (!switch_to_branch)
ret = update_ref(reflog_head, "HEAD", oid, head,
detach_head ? REF_NO_DEREF : 0,
UPDATE_REFS_MSG_ON_ERR);
else {
ret = update_ref(reflog_branch ? reflog_branch : reflog_head,
switch_to_branch, oid, NULL, 0,
UPDATE_REFS_MSG_ON_ERR);
if (!ret)
ret = create_symref("HEAD", switch_to_branch,
reflog_head);
}
if (!ret && run_hook)
run_hooks_l("post-checkout",
oid_to_hex(head ? head : null_oid()),
oid_to_hex(oid), "1", NULL);
strbuf_release(&msg);
return ret;
}
int reset_head(struct repository *r, const struct reset_head_opts *opts)
{
const struct object_id *oid = opts->oid;
const char *switch_to_branch = opts->branch;
unsigned reset_hard = opts->flags & RESET_HEAD_HARD;
unsigned refs_only = opts->flags & RESET_HEAD_REFS_ONLY;
unsigned update_orig_head = opts->flags & RESET_ORIG_HEAD;
struct object_id *head = NULL, head_oid;
struct tree_desc desc[2] = { { NULL }, { NULL } };
struct lock_file lock = LOCK_INIT;
struct unpack_trees_options unpack_tree_opts = { 0 };
struct tree *tree;
const char *action;
int ret = 0, nr = 0;
if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
BUG("Not a fully qualified branch: '%s'", switch_to_branch);
if (opts->orig_head_msg && !update_orig_head)
BUG("ORIG_HEAD reflog message given without updating ORIG_HEAD");
if (opts->branch_msg && !opts->branch)
BUG("branch reflog message given without a branch");
if (!refs_only && repo_hold_locked_index(r, &lock, LOCK_REPORT_ON_ERROR) < 0) {
ret = -1;
goto leave_reset_head;
}
if (!repo_get_oid(r, "HEAD", &head_oid)) {
head = &head_oid;
} else if (!oid || !reset_hard) {
ret = error(_("could not determine HEAD revision"));
goto leave_reset_head;
}
if (!oid)
oid = &head_oid;
if (refs_only)
return update_refs(opts, oid, head);
action = reset_hard ? "reset" : "checkout";
setup_unpack_trees_porcelain(&unpack_tree_opts, action);
unpack_tree_opts.head_idx = 1;
unpack_tree_opts.src_index = r->index;
unpack_tree_opts.dst_index = r->index;
unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
unpack_tree_opts.update = 1;
unpack_tree_opts.merge = 1;
unpack_tree_opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
unpack_tree_opts.skip_cache_tree_update = 1;
init_checkout_metadata(&unpack_tree_opts.meta, switch_to_branch, oid, NULL);
if (reset_hard)
unpack_tree_opts.reset = UNPACK_RESET_PROTECT_UNTRACKED;
if (repo_read_index_unmerged(r) < 0) {
ret = error(_("could not read index"));
goto leave_reset_head;
}
if (!reset_hard && !fill_tree_descriptor(r, &desc[nr++], &head_oid)) {
ret = error(_("failed to find tree of %s"),
oid_to_hex(&head_oid));
goto leave_reset_head;
}
if (!fill_tree_descriptor(r, &desc[nr++], oid)) {
ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
goto leave_reset_head;
}
if (unpack_trees(nr, desc, &unpack_tree_opts)) {
ret = -1;
goto leave_reset_head;
}
tree = parse_tree_indirect(oid);
prime_cache_tree(r, r->index, tree);
if (write_locked_index(r->index, &lock, COMMIT_LOCK) < 0) {
ret = error(_("could not write index"));
goto leave_reset_head;
}
if (oid != &head_oid || update_orig_head || switch_to_branch)
ret = update_refs(opts, oid, head);
leave_reset_head:
rollback_lock_file(&lock);
clear_unpack_trees_porcelain(&unpack_tree_opts);
while (nr)
free((void *)desc[--nr].buffer);
return ret;
}