From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ramkumar Ramachandra Subject: [PATCH 18/18] revert: Propogate errors upwards from do_pick_commit Date: Thu, 28 Jul 2011 22:22:31 +0530 Message-ID: <1311871951-3497-19-git-send-email-artagnon@gmail.com> References: <1311871951-3497-1-git-send-email-artagnon@gmail.com> Cc: Git List , Jonathan Nieder , Christian Couder , Daniel Barkalow , Jeff King To: Junio C Hamano X-From: git-owner@vger.kernel.org Thu Jul 28 19:27:37 2011 Return-path: Envelope-to: gcvg-git-2@lo.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QmUMw-0005yJ-0O for gcvg-git-2@lo.gmane.org; Thu, 28 Jul 2011 19:27:34 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755365Ab1G1R12 (ORCPT ); Thu, 28 Jul 2011 13:27:28 -0400 Received: from mail-gx0-f174.google.com ([209.85.161.174]:53270 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754138Ab1G1R10 (ORCPT ); Thu, 28 Jul 2011 13:27:26 -0400 Received: by gxk21 with SMTP id 21so1978364gxk.19 for ; Thu, 28 Jul 2011 10:27:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=YfMJLnXKc3WY1Pt93vH0uyu59NpelkI0fhxjdWbWBWE=; b=EnzYufrXhip7JmPMMk/IqQjs97jmCDIuek+pDklN2qHWpdNq6XADXfdR4frz0vR69T Ddo6cKGzeq6gfASYPo/yW5tWmXh5RmkmPElk7Uy1HjJPHG8vnLsHrxKPC7FCccGpZFJp IPfTWzqQo4i7hB3uBJsgnrgtHfk9OQ+QJMiPw= Received: by 10.42.244.129 with SMTP id lq1mr165742icb.72.1311872214600; Thu, 28 Jul 2011 09:56:54 -0700 (PDT) Received: from localhost.localdomain ([203.110.240.41]) by mx.google.com with ESMTPS id ue1sm1497759icb.8.2011.07.28.09.56.50 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Jul 2011 09:56:53 -0700 (PDT) X-Mailer: git-send-email 1.7.4.rc1.7.g2cf08.dirty In-Reply-To: <1311871951-3497-1-git-send-email-artagnon@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Currently, revert_or_cherry_pick can fail in two ways. If it encounters a conflict, it returns a positive number indicating the intended exit status for the git wrapper to pass on; for all other errors, it calls die(). The latter behavior is inconsiderate towards callers, as it denies them the opportunity to recover from errors and do other things. After this patch, revert_or_cherry_pick will still return a positive return value to indicate an exit status for conflicts as before, while for some other errors, it will print an error message and return -1 instead of die()-ing. The cmd_revert and cmd_cherry_pick are adjusted to handle the fatal errors by die()-ing themselves. While the full benefits of this patch will only be seen once all the "die" calls are replaced with calls to "error", its immediate impact is to change some "fatal:" messages to say "error:" and to add a new "fatal: cherry-pick failed" message at the end when the operation fails. Inspired-by: Christian Couder Mentored-by: Jonathan Nieder Helped-by: Junio C Hamano Signed-off-by: Ramkumar Ramachandra Signed-off-by: Jonathan Nieder --- builtin/revert.c | 86 +++++++++++++++++++++++++----------------------------- 1 files changed, 40 insertions(+), 46 deletions(-) diff --git a/builtin/revert.c b/builtin/revert.c index 985f49f..f30dbd4 100644 --- a/builtin/revert.c +++ b/builtin/revert.c @@ -66,15 +66,6 @@ struct replay_opts { #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" -static void fatal(const char *advice, ...) -{ - va_list params; - - va_start(params, advice); - vreportf("fatal: ", advice, params); - va_end(params); -} - static const char *action_name(const struct replay_opts *opts) { return opts->action == REVERT ? "revert" : "cherry-pick"; @@ -359,25 +350,20 @@ static struct tree *empty_tree(void) return tree; } -static NORETURN void die_dirty_index(struct replay_opts *opts) +static int error_dirty_index(struct replay_opts *opts) { - if (read_cache_unmerged()) { - die_resolve_conflict(action_name(opts)); - } else { - if (advice_commit_before_merge) { - if (opts->action == REVERT) - die(_("Your local changes would be overwritten by revert.\n" - "Please, commit your changes or stash them to proceed.")); - else - die(_("Your local changes would be overwritten by cherry-pick.\n" - "Please, commit your changes or stash them to proceed.")); - } else { - if (opts->action == REVERT) - die(_("Your local changes would be overwritten by revert.\n")); - else - die(_("Your local changes would be overwritten by cherry-pick.\n")); - } - } + if (read_cache_unmerged()) + return error_resolve_conflict(action_name(opts)); + + /* Different translation strings for cherry-pick and revert */ + if (opts->action == CHERRY_PICK) + error(_("Your local changes would be overwritten by cherry-pick.")); + else + error(_("Your local changes would be overwritten by revert.")); + + if (advice_commit_before_merge) + advise(_("Commit your changes or stash them to proceed.")); + return -1; } static int fast_forward_to(const unsigned char *to, const unsigned char *from) @@ -495,9 +481,9 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts) die (_("Your index file is unmerged.")); } else { if (get_sha1("HEAD", head)) - die (_("You do not have a valid HEAD")); + return error(_("You do not have a valid HEAD")); if (index_differs_from("HEAD", 0)) - die_dirty_index(opts); + return error_dirty_index(opts); } discard_cache(); @@ -510,20 +496,20 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts) struct commit_list *p; if (!opts->mainline) - die(_("Commit %s is a merge but no -m option was given."), - sha1_to_hex(commit->object.sha1)); + return error(_("Commit %s is a merge but no -m option was given."), + sha1_to_hex(commit->object.sha1)); for (cnt = 1, p = commit->parents; cnt != opts->mainline && p; cnt++) p = p->next; if (cnt != opts->mainline || !p) - die(_("Commit %s does not have parent %d"), - sha1_to_hex(commit->object.sha1), opts->mainline); + return error(_("Commit %s does not have parent %d"), + sha1_to_hex(commit->object.sha1), opts->mainline); parent = p->item; } else if (0 < opts->mainline) - die(_("Mainline was specified but commit %s is not a merge."), - sha1_to_hex(commit->object.sha1)); + return error(_("Mainline was specified but commit %s is not a merge."), + sha1_to_hex(commit->object.sha1)); else parent = commit->parents->item; @@ -533,12 +519,12 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts) if (parent && parse_commit(parent) < 0) /* TRANSLATORS: The first %s will be "revert" or "cherry-pick", the second %s a SHA1 */ - die(_("%s: cannot parse parent commit %s"), - action_name(opts), sha1_to_hex(parent->object.sha1)); + return error(_("%s: cannot parse parent commit %s"), + action_name(opts), sha1_to_hex(parent->object.sha1)); if (get_message(commit, &msg) != 0) - die(_("Cannot get commit message for %s"), - sha1_to_hex(commit->object.sha1)); + return error(_("Cannot get commit message for %s"), + sha1_to_hex(commit->object.sha1)); /* * "commit" is an existing commit. We would want to apply @@ -990,27 +976,28 @@ static int pick_revisions(struct replay_opts *opts) walk_revs_populate_todo(&todo_list, opts); if (create_seq_dir() < 0) { - fatal(_("A cherry-pick or revert is in progress.")); + error(_("A cherry-pick or revert is in progress.")); advise(_("Use --continue to continue the operation")); advise(_("or --reset to forget about it")); - exit(128); + return -1; } if (get_sha1("HEAD", sha1)) { if (opts->action == REVERT) - die(_("Can't revert as initial commit")); - die(_("Can't cherry-pick into empty head")); + return error(_("Can't revert as initial commit")); + return error(_("Can't cherry-pick into empty head")); } save_head(sha1_to_hex(sha1)); save_opts(opts); } return pick_commits(todo_list, opts); error: - die(_("No %s in progress"), action_name(opts)); + return error(_("No %s in progress"), action_name(opts)); } int cmd_revert(int argc, const char **argv, const char *prefix) { struct replay_opts opts; + int res; memset(&opts, 0, sizeof(opts)); if (isatty(0)) @@ -1024,16 +1011,23 @@ int cmd_revert(int argc, const char **argv, const char *prefix) * cherry-pick should be handled differently from an existing * one that is being continued */ - return pick_revisions(&opts); + res = pick_revisions(&opts); + if (res < 0) + die(_("revert failed")); + return res; } int cmd_cherry_pick(int argc, const char **argv, const char *prefix) { struct replay_opts opts; + int res; memset(&opts, 0, sizeof(opts)); opts.action = CHERRY_PICK; git_config(git_default_config, NULL); parse_args(argc, argv, &opts); - return pick_revisions(&opts); + res = pick_revisions(&opts); + if (res < 0) + die(_("cherry-pick failed")); + return res; } -- 1.7.4.rc1.7.g2cf08.dirty