git/merge.c
Elijah Newren 04988c8d18 unpack-trees: introduce preserve_ignored to unpack_trees_options
Currently, every caller of unpack_trees() that wants to ensure ignored
files are overwritten by default needs to:
   * allocate unpack_trees_options.dir
   * flip the DIR_SHOW_IGNORED flag in unpack_trees_options.dir->flags
   * call setup_standard_excludes
AND then after the call to unpack_trees() needs to
   * call dir_clear()
   * deallocate unpack_trees_options.dir
That's a fair amount of boilerplate, and every caller uses identical
code.  Make this easier by instead introducing a new boolean value where
the default value (0) does what we want so that new callers of
unpack_trees() automatically get the appropriate behavior.  And move all
the handling of unpack_trees_options.dir into unpack_trees() itself.

While preserve_ignored = 0 is the behavior we feel is the appropriate
default, we defer fixing commands to use the appropriate default until a
later commit.  So, this commit introduces several locations where we
manually set preserve_ignored=1.  This makes it clear where code paths
were previously preserving ignored files when they should not have been;
a future commit will flip these to instead use a value of 0 to get the
behavior we want.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00

105 lines
2.7 KiB
C

#include "cache.h"
#include "diff.h"
#include "diffcore.h"
#include "lockfile.h"
#include "commit.h"
#include "run-command.h"
#include "resolve-undo.h"
#include "tree-walk.h"
#include "unpack-trees.h"
#include "dir.h"
static const char *merge_argument(struct commit *commit)
{
return oid_to_hex(commit ? &commit->object.oid : the_hash_algo->empty_tree);
}
int try_merge_command(struct repository *r,
const char *strategy, size_t xopts_nr,
const char **xopts, struct commit_list *common,
const char *head_arg, struct commit_list *remotes)
{
struct strvec args = STRVEC_INIT;
int i, ret;
struct commit_list *j;
strvec_pushf(&args, "merge-%s", strategy);
for (i = 0; i < xopts_nr; i++)
strvec_pushf(&args, "--%s", xopts[i]);
for (j = common; j; j = j->next)
strvec_push(&args, merge_argument(j->item));
strvec_push(&args, "--");
strvec_push(&args, head_arg);
for (j = remotes; j; j = j->next)
strvec_push(&args, merge_argument(j->item));
ret = run_command_v_opt(args.v, RUN_GIT_CMD);
strvec_clear(&args);
discard_index(r->index);
if (repo_read_index(r) < 0)
die(_("failed to read the cache"));
resolve_undo_clear_index(r->index);
return ret;
}
int checkout_fast_forward(struct repository *r,
const struct object_id *head,
const struct object_id *remote,
int overwrite_ignore)
{
struct tree *trees[MAX_UNPACK_TREES];
struct unpack_trees_options opts;
struct tree_desc t[MAX_UNPACK_TREES];
int i, nr_trees = 0;
struct lock_file lock_file = LOCK_INIT;
refresh_index(r->index, REFRESH_QUIET, NULL, NULL, NULL);
if (repo_hold_locked_index(r, &lock_file, LOCK_REPORT_ON_ERROR) < 0)
return -1;
memset(&trees, 0, sizeof(trees));
memset(&t, 0, sizeof(t));
trees[nr_trees] = parse_tree_indirect(head);
if (!trees[nr_trees++]) {
rollback_lock_file(&lock_file);
return -1;
}
trees[nr_trees] = parse_tree_indirect(remote);
if (!trees[nr_trees++]) {
rollback_lock_file(&lock_file);
return -1;
}
for (i = 0; i < nr_trees; i++) {
parse_tree(trees[i]);
init_tree_desc(t+i, trees[i]->buffer, trees[i]->size);
}
memset(&opts, 0, sizeof(opts));
opts.preserve_ignored = !overwrite_ignore;
opts.head_idx = 1;
opts.src_index = r->index;
opts.dst_index = r->index;
opts.update = 1;
opts.verbose_update = 1;
opts.merge = 1;
opts.fn = twoway_merge;
init_checkout_metadata(&opts.meta, NULL, remote, NULL);
setup_unpack_trees_porcelain(&opts, "merge");
if (unpack_trees(nr_trees, t, &opts)) {
rollback_lock_file(&lock_file);
clear_unpack_trees_porcelain(&opts);
return -1;
}
clear_unpack_trees_porcelain(&opts);
if (write_locked_index(r->index, &lock_file, COMMIT_LOCK))
return error(_("unable to write new index file"));
return 0;
}