From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.0 required=3.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,T_RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 6839320954 for ; Wed, 29 Nov 2017 01:43:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753220AbdK2Bnv (ORCPT ); Tue, 28 Nov 2017 20:43:51 -0500 Received: from mx0a-00153501.pphosted.com ([67.231.148.48]:58472 "EHLO mx0a-00153501.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752363AbdK2BnI (ORCPT ); Tue, 28 Nov 2017 20:43:08 -0500 Received: from pps.filterd (m0096528.ppops.net [127.0.0.1]) by mx0a-00153501.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vAT1c8YP003665; Tue, 28 Nov 2017 17:42:39 -0800 Authentication-Results: ppops.net; spf=softfail smtp.mailfrom=newren@gmail.com Received: from smtp-transport.yojoe.local (mxw3.palantir.com [66.70.54.23] (may be forged)) by mx0a-00153501.pphosted.com with ESMTP id 2ef69q4mx4-2; Tue, 28 Nov 2017 17:42:39 -0800 Received: from mxw1.palantir.com (new-smtp.yojoe.local [172.19.0.45]) by smtp-transport.yojoe.local (Postfix) with ESMTP id E78BE22157CE; Tue, 28 Nov 2017 17:42:38 -0800 (PST) Received: from newren2-linux.yojoe.local (newren2-linux.dyn.yojoe.local [10.100.68.32]) by smtp.yojoe.local (Postfix) with ESMTP id E0D602CDF15; Tue, 28 Nov 2017 17:42:38 -0800 (PST) From: Elijah Newren To: git@vger.kernel.org Cc: sbeller@google.com, gitster@pobox.com, Elijah Newren Subject: [PATCH v4 23/34] merge-recursive: check for directory level conflicts Date: Tue, 28 Nov 2017 17:42:26 -0800 Message-Id: <20171129014237.32570-24-newren@gmail.com> X-Mailer: git-send-email 2.15.0.408.g850bc54b15 In-Reply-To: <20171129014237.32570-1-newren@gmail.com> References: <20171129014237.32570-1-newren@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-SPF-Result: softfail X-Proofpoint-SPF-Record: v=spf1 redirect=_spf.google.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-11-28_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=4 phishscore=0 bulkscore=0 spamscore=0 clxscore=1034 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1711290020 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Before trying to apply directory renames to paths within the given directories, we want to make sure that there aren't conflicts at the directory level. There will be additional checks at the individual file level too, which will be added later. Signed-off-by: Elijah Newren --- merge-recursive.c | 119 ++++++++++++++++++++++++++++++++++++++++++++++++= ++++++ 1 file changed, 119 insertions(+) diff --git a/merge-recursive.c b/merge-recursive.c index 6aef357e78..d92fba2775 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -1384,6 +1384,15 @@ static struct diff_queue_struct *get_diffpairs(str= uct merge_options *o, return ret; } =20 +static int tree_has_path(struct tree *tree, const char *path) +{ + unsigned char hashy[20]; + unsigned int mode_o; + + return !get_tree_entry(tree->object.oid.hash, path, + hashy, &mode_o); +} + static void get_renamed_dir_portion(const char *old_path, const char *ne= w_path, char **old_dir, char **new_dir) { @@ -1438,6 +1447,112 @@ static void get_renamed_dir_portion(const char *o= ld_path, const char *new_path, } } =20 +static void remove_hashmap_entries(struct hashmap *dir_renames, + struct string_list *items_to_remove) +{ + int i; + struct dir_rename_entry *entry; + + for (i =3D 0; i < items_to_remove->nr; i++) { + entry =3D items_to_remove->items[i].util; + hashmap_remove(dir_renames, entry, NULL); + } + string_list_clear(items_to_remove, 0); +} + +/* + * There are a couple things we want to do at the directory level: + * 1. Check for both sides renaming to the same thing, in order to avo= id + * implicit renaming of files that should be left in place. (See + * testcase 6b in t6043 for details.) + * 2. Prune directory renames if there are still files left in the + * the original directory. These represent a partial directory ren= ame, + * i.e. a rename where only some of the files within the directory + * were renamed elsewhere. (Technically, this could be done earlie= r + * in get_directory_renames(), except that would prevent us from + * doing the previous check and thus failing testcase 6b.) + * 3. Check for rename/rename(1to2) conflicts (at the directory level)= . + * In the future, we could potentially record this info as well and + * omit reporting rename/rename(1to2) conflicts for each path withi= n + * the affected directories, thus cleaning up the merge output. + * NOTE: We do NOT check for rename/rename(2to1) conflicts at the + * directory level, because merging directories is fine. If it + * causes conflicts for files within those merged directories, t= hen + * that should be detected at the individual path level. + */ +static void handle_directory_level_conflicts(struct merge_options *o, + struct hashmap *dir_re_head, + struct tree *head, + struct hashmap *dir_re_merge, + struct tree *merge) +{ + struct hashmap_iter iter; + struct dir_rename_entry *head_ent; + struct dir_rename_entry *merge_ent; + + struct string_list remove_from_head =3D STRING_LIST_INIT_NODUP; + struct string_list remove_from_merge =3D STRING_LIST_INIT_NODUP; + + hashmap_iter_init(dir_re_head, &iter); + while ((head_ent =3D hashmap_iter_next(&iter))) { + merge_ent =3D dir_rename_find_entry(dir_re_merge, head_ent->dir); + if (merge_ent && + !head_ent->non_unique_new_dir && + !merge_ent->non_unique_new_dir && + !strbuf_cmp(&head_ent->new_dir, &merge_ent->new_dir)) { + /* 1. Renamed identically; remove it from both sides */ + string_list_append(&remove_from_head, + head_ent->dir)->util =3D head_ent; + strbuf_release(&head_ent->new_dir); + string_list_append(&remove_from_merge, + merge_ent->dir)->util =3D merge_ent; + strbuf_release(&merge_ent->new_dir); + } else if (tree_has_path(head, head_ent->dir)) { + /* 2. This wasn't a directory rename after all */ + string_list_append(&remove_from_head, + head_ent->dir)->util =3D head_ent; + strbuf_release(&head_ent->new_dir); + } + } + + remove_hashmap_entries(dir_re_head, &remove_from_head); + remove_hashmap_entries(dir_re_merge, &remove_from_merge); + + hashmap_iter_init(dir_re_merge, &iter); + while ((merge_ent =3D hashmap_iter_next(&iter))) { + head_ent =3D dir_rename_find_entry(dir_re_head, merge_ent->dir); + if (tree_has_path(merge, merge_ent->dir)) { + /* 2. This wasn't a directory rename after all */ + string_list_append(&remove_from_merge, + merge_ent->dir)->util =3D merge_ent; + } else if (head_ent && + !head_ent->non_unique_new_dir && + !merge_ent->non_unique_new_dir) { + /* 3. rename/rename(1to2) */ + /* + * We can assume it's not rename/rename(1to1) because + * that was case (1), already checked above. So we + * know that head_ent->new_dir and merge_ent->new_dir + * are different strings. + */ + output(o, 1, _("CONFLICT (rename/rename): " + "Rename directory %s->%s in %s. " + "Rename directory %s->%s in %s"), + head_ent->dir, head_ent->new_dir.buf, o->branch1, + head_ent->dir, merge_ent->new_dir.buf, o->branch2); + string_list_append(&remove_from_head, + head_ent->dir)->util =3D head_ent; + strbuf_release(&head_ent->new_dir); + string_list_append(&remove_from_merge, + merge_ent->dir)->util =3D merge_ent; + strbuf_release(&merge_ent->new_dir); + } + } + + remove_hashmap_entries(dir_re_head, &remove_from_head); + remove_hashmap_entries(dir_re_merge, &remove_from_merge); +} + static struct hashmap *get_directory_renames(struct diff_queue_struct *p= airs, struct tree *tree) { @@ -1869,6 +1984,10 @@ static int handle_renames(struct merge_options *o, dir_re_head =3D get_directory_renames(head_pairs, head); dir_re_merge =3D get_directory_renames(merge_pairs, merge); =20 + handle_directory_level_conflicts(o, + dir_re_head, head, + dir_re_merge, merge); + ri->head_renames =3D get_renames(o, head_pairs, head, common, head, merge, entries); ri->merge_renames =3D get_renames(o, merge_pairs, merge, --=20 2.15.0.408.g850bc54b15