From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Tan Subject: [PATCH/WIP v3 13/31] am: implement --skip Date: Thu, 18 Jun 2015 19:25:25 +0800 Message-ID: <1434626743-8552-14-git-send-email-pyokagan@gmail.com> References: <1434626743-8552-1-git-send-email-pyokagan@gmail.com> Cc: Johannes Schindelin , Stefan Beller , Paul Tan To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Thu Jun 18 13:27:11 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Z5XyG-000505-QS for gcvg-git-2@plane.gmane.org; Thu, 18 Jun 2015 13:27:01 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755541AbbFRL0z (ORCPT ); Thu, 18 Jun 2015 07:26:55 -0400 Received: from mail-pd0-f170.google.com ([209.85.192.170]:34166 "EHLO mail-pd0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755511AbbFRL0r (ORCPT ); Thu, 18 Jun 2015 07:26:47 -0400 Received: by pdbki1 with SMTP id ki1so64750638pdb.1 for ; Thu, 18 Jun 2015 04:26:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2j7Si6e24LS4qZD4HV5bQuNgeYM+rnA7qkMDXkssVtw=; b=KXN4EpTiHkNQe0xd1AxEsjcBW7FOuWnoa+1bSAtBFNB6G639M4nnSjhWUwyd4Un5c6 ipMZhMDg7DgvIinemJ5ohZiUYvkSKRyQPPMdvz8w0NyP1mUoNZHJ5JYGTbLFfTGHyEY4 4ismINeN6vNH1PnNVoPV+w8aijMgDhcbo6zMFbIA1FGLrEs4cBBEdx6Vd5KctWJhW429 ujlLujvEKE4SMrtV6rzNkdszKX8MH57B/HyGSmNeOYd+peDvkDm115+ORdMD4VJaItTr jWFTpxw+KxbfAeYkWgfzTVZtizIAFuozUTUdMGQ7g0DonXvNqUd40L7RRuSCFKl+Wcff G6Zw== X-Received: by 10.70.37.9 with SMTP id u9mr20222477pdj.50.1434626807393; Thu, 18 Jun 2015 04:26:47 -0700 (PDT) Received: from yoshi.pyokagan.tan ([116.86.132.138]) by mx.google.com with ESMTPSA id j9sm5443016pdl.65.2015.06.18.04.26.44 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 18 Jun 2015 04:26:46 -0700 (PDT) X-Mailer: git-send-email 2.1.4 In-Reply-To: <1434626743-8552-1-git-send-email-pyokagan@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am supported resuming from a failed patch application by skipping the current patch. Re-implement this feature by introducing am_skip(). Signed-off-by: Paul Tan --- builtin/am.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 119 insertions(+), 2 deletions(-) diff --git a/builtin/am.c b/builtin/am.c index 4381164..0d7af19 100644 --- a/builtin/am.c +++ b/builtin/am.c @@ -16,6 +16,8 @@ #include "lockfile.h" #include "diff.h" #include "diffcore.h" +#include "unpack-trees.h" +#include "branch.h" /** * Returns 1 if the file is empty or does not exist, 0 otherwise. @@ -735,6 +737,114 @@ static void am_resolve(struct am_state *state) } /** + * Performs a checkout fast-forward from `head` to `remote`. If `reset` is + * true, any unmerged entries will be discarded. Returns 0 on success, -1 on + * failure. + */ +static int fast_forward_to(struct tree *head, struct tree *remote, int reset) +{ + struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); + struct unpack_trees_options opts; + struct tree_desc t[2]; + + if (parse_tree(head) || parse_tree(remote)) + return -1; + + hold_locked_index(lock_file, 1); + + refresh_cache(REFRESH_QUIET); + + memset(&opts, 0, sizeof(opts)); + opts.head_idx = 1; + opts.src_index = &the_index; + opts.dst_index = &the_index; + opts.update = 1; + opts.merge = 1; + opts.reset = reset; + opts.fn = twoway_merge; + init_tree_desc(&t[0], head->buffer, head->size); + init_tree_desc(&t[1], remote->buffer, remote->size); + + if (unpack_trees(2, t, &opts)) { + rollback_lock_file(lock_file); + return -1; + } + + if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) + die(_("unable to write new index file")); + + return 0; +} + +/** + * Clean the index without touching entries that are not modified between + * `head` and `remote`. + */ +static int clean_index(const unsigned char *head, const unsigned char *remote) +{ + struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); + struct tree *head_tree, *remote_tree, *index_tree; + unsigned char index[GIT_SHA1_RAWSZ]; + struct pathspec pathspec; + + head_tree = parse_tree_indirect(head); + if (!head_tree) + return error(_("Could not parse object '%s'."), sha1_to_hex(head)); + + remote_tree = parse_tree_indirect(remote); + if (!remote_tree) + return error(_("Could not parse object '%s'."), sha1_to_hex(remote)); + + read_cache_unmerged(); + + if (fast_forward_to(head_tree, head_tree, 1)) + return -1; + + if (write_cache_as_tree(index, 0, NULL)) + return -1; + + index_tree = parse_tree_indirect(index); + if (!index_tree) + return error(_("Could not parse object '%s'."), sha1_to_hex(index)); + + if (fast_forward_to(index_tree, remote_tree, 0)) + return -1; + + memset(&pathspec, 0, sizeof(pathspec)); + + hold_locked_index(lock_file, 1); + + if (read_tree(remote_tree, 0, &pathspec)) { + rollback_lock_file(lock_file); + return -1; + } + + if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) + die(_("unable to write new index file")); + + remove_branch_state(); + + return 0; +} + +/** + * Resume the current am session by skipping the current patch. + */ +static void am_skip(struct am_state *state) +{ + unsigned char head[GIT_SHA1_RAWSZ]; + + if (get_sha1("HEAD", head)) + hashcpy(head, EMPTY_TREE_SHA1_BIN); + + if (clean_index(head, head)) + die(_("failed to clean index")); + + am_next(state); + am_run(state); +} + +/** * parse_options() callback that validates and sets opt->value to the * PATCH_FORMAT_* enum value corresponding to `arg`. */ @@ -751,7 +861,8 @@ static int parse_opt_patchformat(const struct option *opt, const char *arg, int enum resume_mode { RESUME_FALSE = 0, - RESUME_RESOLVED + RESUME_RESOLVED, + RESUME_SKIP }; static struct am_state state; @@ -760,7 +871,7 @@ static enum resume_mode opt_resume; static const char * const am_usage[] = { N_("git am [options] [(|)...]"), - N_("git am [options] --continue"), + N_("git am [options] (--continue | --skip)"), NULL }; @@ -773,6 +884,9 @@ static struct option am_options[] = { OPT_CMDMODE('r', "resolved", &opt_resume, N_("synonyms for --continue"), RESUME_RESOLVED), + OPT_CMDMODE(0, "skip", &opt_resume, + N_("skip the current patch"), + RESUME_SKIP), OPT_END() }; @@ -831,6 +945,9 @@ int cmd_am(int argc, const char **argv, const char *prefix) case RESUME_RESOLVED: am_resolve(&state); break; + case RESUME_SKIP: + am_skip(&state); + break; default: die("BUG: invalid resume value"); } -- 2.1.4