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wt-status: make the require_clean_work_tree() function reusable

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The function used by "git pull" to stop the user when the working
tree has changes is useful in other places.

Let's move it into a more prominent (and into an actually reusable)
spot: wt-status.[ch].

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2016-10-07 18:08:38 +02:00
committed by Junio C Hamano
parent ea63b393ec
commit fd84986f46
3 changed files with 80 additions and 76 deletions
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76
wt-status.c
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@ -16,6 +16,7 @@
#include "strbuf.h"
#include "utf8.h"
#include "worktree.h"
#include "lockfile.h"
static const char cut_line[] =
"------------------------ >8 ------------------------\n";
@ -2209,3 +2210,78 @@ void wt_status_print(struct wt_status *s)
break;
}
}
/**
* Returns 1 if there are unstaged changes, 0 otherwise.
*/
static int has_unstaged_changes(void)
{
struct rev_info rev_info;
int result;
init_revisions(&rev_info, NULL);
DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
DIFF_OPT_SET(&rev_info.diffopt, QUICK);
diff_setup_done(&rev_info.diffopt);
result = run_diff_files(&rev_info, 0);
return diff_result_code(&rev_info.diffopt, result);
}
/**
* Returns 1 if there are uncommitted changes, 0 otherwise.
*/
static int has_uncommitted_changes(void)
{
struct rev_info rev_info;
int result;
if (is_cache_unborn())
return 0;
init_revisions(&rev_info, NULL);
DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
DIFF_OPT_SET(&rev_info.diffopt, QUICK);
add_head_to_pending(&rev_info);
diff_setup_done(&rev_info.diffopt);
result = run_diff_index(&rev_info, 1);
return diff_result_code(&rev_info.diffopt, result);
}
/**
* If the work tree has unstaged or uncommitted changes, dies with the
* appropriate message.
*/
int require_clean_work_tree(const char *action, const char *hint, int gently)
{
struct lock_file *lock_file = xcalloc(1, sizeof(*lock_file));
int err = 0;
hold_locked_index(lock_file, 0);
refresh_cache(REFRESH_QUIET);
update_index_if_able(&the_index, lock_file);
rollback_lock_file(lock_file);
if (has_unstaged_changes()) {
/* TRANSLATORS: the action is e.g. "pull with rebase" */
error(_("Cannot %s: You have unstaged changes."), _(action));
err = 1;
}
if (has_uncommitted_changes()) {
if (err)
error(_("Additionally, your index contains uncommitted changes."));
else
error(_("Cannot %s: Your index contains uncommitted changes."),
_(action));
err = 1;
}
if (err) {
if (hint)
error("%s", hint);
if (!gently)
exit(128);
}
return err;
}