user/dev discussion of public-inbox itself
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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 23/95] lei_mirror: reduce noise on interrupted clones
Date: Mon, 28 Nov 2022 05:31:20 +0000	[thread overview]
Message-ID: <20221128053232.291618-24-e@80x24.org> (raw)
In-Reply-To: <20221128053232.291618-1-e@80x24.org>

We don't need git-config or other commands failing loudly.
`git clone' and subcommands it spawns may still spew, but it's no
worse than interrupting `git clone' itself, now.

We accomplish this by localizing $LIVE (formerly %LIVE) and
detecting when its auto-vivification into a hashref goes
out-of-scope during the `DESTRUCT' ${^GLOBAL_PHASE}.

We can't use ${^GLOBAL_PHASE}, yet, either, since it appeared in
Perl 5.14 and we're still migrating slowly to Perl 5.12 before
going to 5.14.
---
 lib/PublicInbox/LeiMirror.pm | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index b6e12b95..f81f6094 100644
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -20,7 +20,7 @@ use PublicInbox::Inbox;
 use PublicInbox::LeiCurl;
 use PublicInbox::OnDestroy;
 
-our %LIVE; # pid => callback
+our $LIVE; # pid => callback
 
 sub _wq_done_wait { # dwaitpid callback (via wq_eof)
 	my ($arg, $pid) = @_;
@@ -68,7 +68,7 @@ sub try_scrape {
 			$n => [ URI->new($_), '' ]
 		} @v2_urls; # uniq
 		clone_v2($self, \%v2_epochs);
-		reap_live() while keys(%LIVE);
+		reap_live() while keys(%$LIVE);
 		return;
 	}
 
@@ -126,11 +126,11 @@ sub _get_txt_start { # non-fatal
 	my $cmd = $self->{curl}->for_uri($lei, $uri, qw(--compressed -R -o),
 					$ft->filename);
 	my $jobs = $lei->{opt}->{jobs} // 1;
-	reap_live() while keys(%LIVE) >= $jobs;
+	reap_live() while keys(%$LIVE) >= $jobs;
 	$lei->qerr("# @$cmd");
 	return if $self->{dry_run};
 	$self->{"-get_txt.$endpoint"} = [ $ft, $cmd, $uri ];
-	$LIVE{spawn($cmd, undef, $opt)} =
+	$LIVE->{spawn($cmd, undef, $opt)} =
 			[ \&_get_txt_done, $self, $endpoint, $fini ];
 }
 
@@ -237,10 +237,10 @@ sub run_reap {
 sub start_clone {
 	my ($self, $cmd, $opt, $fini) = @_;
 	my $jobs = $self->{lei}->{opt}->{jobs} // 1;
-	reap_live() while keys(%LIVE) >= $jobs;
+	reap_live() while keys(%$LIVE) >= $jobs;
 	$self->{lei}->qerr("# @$cmd");
 	return if $self->{dry_run};
-	$LIVE{spawn($cmd, undef, $opt)} = [ \&reap_clone, $self, $cmd, $fini ];
+	$LIVE->{spawn($cmd, undef, $opt)} = [ \&reap_clone, $self, $cmd, $fini ]
 }
 
 sub clone_v1 {
@@ -264,7 +264,7 @@ sub clone_v1 {
 	defined($d) ? ($self->{'txt.description'} = $d) :
 		_get_txt_start($self, 'description', $fini);
 
-	reap_live() until ($nohang || !keys(%LIVE)); # for non-manifest clone
+	reap_live() until ($nohang || !keys(%$LIVE)); # for non-manifest clone
 }
 
 sub parse_epochs ($$) {
@@ -345,14 +345,14 @@ sub reap_clone { # async, called via SIGCHLD
 	my $cerr = $?;
 	$? = 0; # don't let it influence normal exit
 	if ($cerr) {
-		kill('TERM', keys %LIVE);
+		kill('TERM', keys %$LIVE);
 		$self->{lei}->child_error($cerr, "@$cmd failed");
 	}
 }
 
 sub v1_done { # called via OnDestroy
 	my ($self) = @_;
-	return if $self->{dry_run};
+	return if $self->{dry_run} || !$LIVE;
 	_write_inbox_config($self);
 	my $dst = $self->{cur_dst} // $self->{dst};
 	if (defined(my $o = $self->{-ent} ? $self->{-ent}->{owner} : undef)) {
@@ -375,7 +375,7 @@ sub v1_done { # called via OnDestroy
 
 sub v2_done { # called via OnDestroy
 	my ($self) = @_;
-	return if $self->{dry_run};
+	return if $self->{dry_run} || !$LIVE;
 	_write_inbox_config($self);
 	require PublicInbox::MultiGit;
 	my $dst = $self->{cur_dst} // $self->{dst};
@@ -398,7 +398,7 @@ sub v2_done { # called via OnDestroy
 
 sub reap_live {
 	my $pid = waitpid(-1, 0) // die "waitpid(-1): $!";
-	if (my $x = delete $LIVE{$pid}) {
+	if (my $x = delete $LIVE->{$pid}) {
 		my $cb = shift @$x;
 		$cb->(@$x);
 	} else {
@@ -564,7 +564,7 @@ sub try_manifest {
 	my $cmd = $curl->for_uri($lei, $uri, '-R', '-o', $fn);
 	my %opt = map { $_ => $lei->{$_} } (0..2);
 	my $cerr = run_reap($lei, $cmd, \%opt);
-	local %LIVE;
+	local $LIVE;
 	if ($cerr) {
 		return try_scrape($self) if ($cerr >> 8) == 22; # 404 missing
 		return $lei->child_error($cerr, "@$cmd failed");
@@ -627,7 +627,7 @@ EOM
 		}
 		clone_all($self, $todo, $m);
 	}
-	reap_live() while keys(%LIVE);
+	reap_live() while keys(%$LIVE);
 	return if $self->{lei}->{child_error} || $self->{dry_run};
 
 	if (delete $self->{-culled_manifest}) { # set by clone_v2/-I/--exclude
@@ -656,7 +656,7 @@ sub do_mirror { # via wq_io_do
 	eval {
 		my $iv = $lei->{opt}->{'inbox-version'};
 		if (defined $iv) {
-			local %LIVE;
+			local $LIVE;
 			return clone_v1($self) if $iv == 1;
 			return try_scrape($self) if $iv == 2;
 			die "bad --inbox-version=$iv\n";

  parent reply	other threads:[~2022-11-28  5:32 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-28  5:30 [PATCH 00/95] clone: multi-inbox/repo support Eric Wong
2022-11-28  5:30 ` [PATCH 01/95] clone: support multi-inbox clone Eric Wong
2022-11-28  5:30 ` [PATCH 02/95] clone: support --include and --exclude with multi-clone Eric Wong
2022-11-28  5:31 ` [PATCH 03/95] clone: parallelize v2 epoch clones Eric Wong
2022-11-28  5:31 ` [PATCH 04/95] lei_mirror: async config retrieval for v2 w/ manifest Eric Wong
2022-11-28  5:31 ` [PATCH 05/95] lei_mirror: rely on DESTROY to index v2 inbox Eric Wong
2022-11-28  5:31 ` [PATCH 06/95] lei_mirror: rely on global process reaper Eric Wong
2022-11-28  5:31 ` [PATCH 07/95] clone: support parallel v1 clones Eric Wong
2022-11-28  5:31 ` [PATCH 08/95] lei_mirror: default to single job by default Eric Wong
2022-11-28  5:31 ` [PATCH 09/95] lei_mirror: move directory creation to v2-only path Eric Wong
2022-11-28  5:31 ` [PATCH 10/95] lei_mirror: retrieve description text asynchronously, too Eric Wong
2022-11-28  5:31 ` [PATCH 11/95] switch inotify/kevent stuff to v5.12 Eric Wong
2022-11-28  5:31 ` [PATCH 12/95] manifest: update module blurb + v5.12 Eric Wong
2022-11-28  5:31 ` [PATCH 13/95] lei_mirror: simplify _get_txt_start callers Eric Wong
2022-11-28  5:31 ` [PATCH 14/95] lei_mirror: elide description retrieval for v1|coderepo Eric Wong
2022-11-28  5:31 ` [PATCH 15/95] lei_mirror: add a hint for skipped epoch permissions Eric Wong
2022-11-28  5:31 ` [PATCH 16/95] lei_mirror: consolidate clone process management Eric Wong
2022-11-28  5:31 ` [PATCH 17/95] lei_mirror: load File::Path unconditionally Eric Wong
2022-11-28  5:31 ` [PATCH 18/95] lei_mirror: load most modules up-front Eric Wong
2022-11-28  5:31 ` [PATCH 19/95] lei_mirror: set gitweb.owner from manifest Eric Wong
2022-11-28  5:31 ` [PATCH 20/95] clone: support --dry-run / -n flag Eric Wong
2022-11-28  5:31 ` [PATCH 21/95] lei_mirror: initialize placeholders with "head" from manifest Eric Wong
2022-11-28  5:31 ` [PATCH 22/95] lei_mirror: support {reference} for v1 manifest clones Eric Wong
2022-11-28  5:31 ` Eric Wong [this message]
2022-11-28  5:31 ` [PATCH 24/95] clone: support --inbox-config option Eric Wong
2022-11-28  5:31 ` [PATCH 25/95] lei_mirror: retrieve v2 description properly Eric Wong
2022-11-28  5:31 ` [PATCH 26/95] lei_mirror: reduce scope of v2 lock Eric Wong
2022-11-28  5:31 ` [PATCH 27/95] lei_mirror: allow --epoch on mixed v1/v2 clones Eric Wong
2022-11-28  5:31 ` [PATCH 28/95] lei_mirror: fix infinite loop in dependency resolution Eric Wong
2022-11-28  5:31 ` [PATCH 29/95] lei_mirror: defend against infinite loops Eric Wong
2022-11-28  5:31 ` [PATCH 30/95] lei_mirror: do not fetch descriptions if using manifest Eric Wong
2022-11-28  5:31 ` [PATCH 31/95] lei_mirror: require PublicInbox::Lock at use Eric Wong
2022-11-28  5:31 ` [PATCH 32/95] lei_mirror: fix glob semantics to match end-of-path Eric Wong
2022-11-28  5:31 ` [PATCH 33/95] lei_mirror: differentiate -entv vs -ent Eric Wong
2022-11-28  5:31 ` [PATCH 34/95] lei_mirror: support manifest {references} for v2 epochs Eric Wong
2022-11-28  5:31 ` [PATCH 35/95] lei_mirror: simplify v2 code paths Eric Wong
2022-11-28  5:31 ` [PATCH 36/95] clone: support --inbox-version Eric Wong
2022-11-28  5:31 ` [PATCH 37/95] lei_mirror: require Perl v5.12+ Eric Wong
2022-11-28  5:31 ` [PATCH 38/95] lei_mirror: ensure curl exits 22 on HTTP 404 responses Eric Wong
2022-11-28  5:31 ` [PATCH 39/95] lei_mirror: cleanup File::Temp OO usage Eric Wong
2022-11-28  5:31 ` [PATCH 40/95] lei_mirror: add `index' target to generated Makefile Eric Wong
2022-11-28  5:31 ` [PATCH 41/95] lei_mirror: do not write Makefile for --inbox-config=never Eric Wong
2022-11-28  5:31 ` [PATCH 42/95] lei_mirror: hoist out dump_manifest sub Eric Wong
2022-11-28  5:31 ` [PATCH 43/95] lei_mirror: avoid convoluted lazy_cb usage Eric Wong
2022-11-28  5:31 ` [PATCH 44/95] lei_mirror: simplify clone_v2_prep Eric Wong
2022-11-28  5:31 ` [PATCH 45/95] lei_mirror: support --objstore and forkgroups Eric Wong
2022-11-28  5:31 ` [PATCH 46/95] lei_mirror: cleanup process reaping logic Eric Wong
2022-11-28  5:31 ` [PATCH 47/95] lei_mirror: ensure git <1.8.5 fallback can use torsocks Eric Wong
2022-11-28  5:31 ` [PATCH 48/95] clone: flesh out --objstore behavior and document Eric Wong
2022-11-28  5:31 ` [PATCH 49/95] lei_mirror: always pack refs for coderepos Eric Wong
2022-11-28  5:31 ` [PATCH 50/95] lei_mirror: set description for non-inboxes, too Eric Wong
2022-11-28  5:31 ` [PATCH 51/95] lei_mirror: force --no-tags when fetching forkgroups Eric Wong
2022-11-28  5:31 ` [PATCH 52/95] lei_mirror: preserve permissions of existing alternates file Eric Wong
2022-11-28  5:31 ` [PATCH 53/95] lei_mirror: do not show ref updates w/o --verbose Eric Wong
2022-11-28  5:31 ` [PATCH 54/95] lei_mirror: drop git <1.8.5 support Eric Wong
2022-11-28  5:31 ` [PATCH 55/95] lei_mirror: make basename more descriptive Eric Wong
2022-11-28  5:31 ` [PATCH 56/95] lei_mirror: fix --dry-run for forkgroups Eric Wong
2022-11-28  5:31 ` [PATCH 57/95] lei_mirror: forkgroups use `git fetch --multiple' Eric Wong
2022-11-28  5:31 ` [PATCH 58/95] clone: move --dry-run handling to lei_mirror Eric Wong
2022-11-28  5:31 ` [PATCH 59/95] clone: drop unnecessary requires Eric Wong
2022-11-28  5:31 ` [PATCH 60/95] clone: use v5.12 Eric Wong
2022-11-28  5:31 ` [PATCH 61/95] clone: require `--objstore=' for default location Eric Wong
2022-11-28  5:31 ` [PATCH 62/95] lei_mirror: shorten remote names Eric Wong
2022-11-28  5:32 ` [PATCH 63/95] fetch: use v5.12 Eric Wong
2022-11-28  5:32 ` [PATCH 64/95] fetch: eliminate File::Temp->filename var Eric Wong
2022-11-28  5:32 ` [PATCH 65/95] lei_mirror: properly pack-refs in non-forkgroup repos Eric Wong
2022-11-28  5:32 ` [PATCH 66/95] lei_mirror: show child error error code Eric Wong
2022-11-28  5:32 ` [PATCH 67/95] on_destroy: support ->cancel callback Eric Wong
2022-11-28  5:32 ` [PATCH 68/95] lei_mirror: support resuming multi-repo clones Eric Wong
2022-11-28  5:32 ` [PATCH 69/95] lei_mirror: check fingerprints before fetching Eric Wong
2022-11-28  5:32 ` [PATCH 70/95] clone: support loading manifest.js.gz from destination Eric Wong
2022-11-28  5:32 ` [PATCH 71/95] lei_mirror: delay configuring forkgroups Eric Wong
2022-11-28  5:32 ` [PATCH 72/95] clone: canonicalize destination path from CLI Eric Wong
2022-11-28  5:32 ` [PATCH 73/95] clone|fetch: support passing --prune(-tags) to `git fetch' Eric Wong
2022-11-28  5:32 ` [PATCH 74/95] lei_mirror: avoid needless FD passing Eric Wong
2022-11-28  5:32 ` [PATCH 75/95] clone: support --keep-going/-k like make(1) Eric Wong
2022-11-28  5:32 ` [PATCH 76/95] lei_mirror: don't warn on missing manifest on initial clone Eric Wong
2022-11-28  5:32 ` [PATCH 77/95] lei_mirror: respect `./' and `../' prefixes for CLI args Eric Wong
2022-11-28  5:32 ` [PATCH 78/95] lei_mirror: --manifest= affects destination, too Eric Wong
2022-11-28  5:32 ` [PATCH 79/95] lei_mirror: update fingerprints when writing local manifest.js.gz Eric Wong
2022-11-28  5:32 ` [PATCH 80/95] lei_mirror: remove janky mirror.done stamp file Eric Wong
2022-11-28  5:32 ` [PATCH 81/95] lei_mirror: simplify most process spawning Eric Wong
2022-11-28  5:32 ` [PATCH 82/95] lei_mirror: run v1_done earlier on forkgroup done Eric Wong
2022-11-28  5:32 ` [PATCH 83/95] lei_mirror: simplify forkgroup-related subs Eric Wong
2022-11-28  5:32 ` [PATCH 84/95] lei_mirror: shorten scope mirror objects Eric Wong
2022-11-28  5:32 ` [PATCH 85/95] lei_mirror: set {head} from manifest Eric Wong
2022-11-28  5:32 ` [PATCH 86/95] lei_mirror: support {symlinks} " Eric Wong
2022-11-28  5:32 ` [PATCH 87/95] lei_mirror: eliminate circular references Eric Wong
2022-11-28  5:32 ` [PATCH 88/95] lei_mirror: use curl -z/--timecond if manifest exists Eric Wong
2022-11-28  5:32 ` [PATCH 89/95] lei_mirror: avoid redundant curl `-f' use Eric Wong
2022-11-28  5:32 ` [PATCH 90/95] lei_mirror: omit trailing slash for git remote.*.url Eric Wong
2022-11-28  5:32 ` [PATCH 91/95] lei_mirror: set info/web/last-modified from manifest Eric Wong
2022-11-28  5:32 ` [PATCH 92/95] lei_mirror: don't clobber inbox.config.example if it exists Eric Wong
2022-11-28  5:32 ` [PATCH 93/95] lei_mirror: break out of fgrp fetch iteration early Eric Wong
2022-11-28  5:32 ` [PATCH 94/95] clone: support --project-list= for cgit Eric Wong
2022-11-28  5:32 ` [PATCH 95/95] lei_mirror: handle forkgroup changes Eric Wong

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