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switch: add --discard-changes

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--discard-changes is a better name than --force for this option since
it's what really happens. --force is turned to an alias for
--discard-changes. But it's meant to be an alias for potentially more
force options in the future.

Side note. It's not obvious from the patch but --discard-changes also
affects submodules if --recurse-submodules is used. The knob to force
updating submodules is hidden behind unpack-trees.c

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2019-03-29 17:39:07 +07:00 committed by Junio C Hamano
parent b7b5fce270
commit 3ec37ad13d
1 changed files with 10 additions and 2 deletions
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12
builtin/checkout.c
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@ -53,6 +53,7 @@ struct checkout_opts {
int count_checkout_paths;
int overlay_mode;
int no_dwim_new_local_branch;
int discard_changes;
/*
* If new checkout options are added, skip_merge_working_tree
@ -680,7 +681,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
return error(_("index file corrupt"));
resolve_undo_clear();
if (opts->force) {
if (opts->discard_changes) {
ret = reset_tree(get_commit_tree(new_branch_info->commit),
opts, 1, writeout_error);
if (ret)
@ -802,7 +803,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
die(_("unable to write new index file"));
if (!opts->force && !opts->quiet)
if (!opts->discard_changes && !opts->quiet)
show_local_changes(&new_branch_info->commit->object, &opts->diff_options);
return 0;
@ -1309,6 +1310,9 @@ static int checkout_branch(struct checkout_opts *opts,
if (opts->force && opts->merge)
die(_("'%s' cannot be used with '%s'"), "-f", "-m");
if (opts->discard_changes && opts->merge)
die(_("'%s' cannot be used with '%s'"), "--discard-changes", "--merge");
if (opts->force_detach && opts->new_branch)
die(_("'%s' cannot be used with '%s'"),
"--detach", "-b/-B/--orphan");
@ -1445,6 +1449,8 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
opts->merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", opts->conflict_style, NULL);
}
if (opts->force)
opts->discard_changes = 1;
if ((!!opts->new_branch + !!opts->new_branch_force + !!opts->new_orphan_branch) > 1)
die(_("-b, -B and --orphan are mutually exclusive"));
@ -1600,6 +1606,8 @@ int cmd_switch(int argc, const char **argv, const char *prefix)
N_("create and switch to a new branch")),
OPT_STRING('C', "force-create", &opts.new_branch_force, N_("branch"),
N_("create/reset and switch to a branch")),
OPT_BOOL(0, "discard-changes", &opts.discard_changes,
N_("throw away local modifications")),
OPT_END()
};
int ret;