+ local $lei->{opt} = { jobs => 2 }; # for atomic writes
+ unlink $f or BAIL_OUT "unlink $!";
+ $wcb = PublicInbox::LeiToMail->write_cb($dst, $lei);
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\($dup = $buf), 'deadbeef', [ qw(seen) ]);
+ undef $wcb;
+ is(xqx([@$dc_cmd, $f]), $orig, "$zsfx matches with lock");
+
+ local $lei->{opt} = { augment => 1 };
+ $wcb = PublicInbox::LeiToMail->write_cb($dst, $lei);
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\($dup = $buf . "\nx\n"), 'deadbeef', [ qw(seen) ]);
+ undef $wcb; # commit
+
+ my $cat = popen_rd([@$dc_cmd, $f]);
+ my @raw;
+ PublicInbox::MboxReader->$mbox($cat,
+ sub { push @raw, shift->as_string });
+ like($raw[1], qr/\nblah\n\nx\n\z/s, "augmented $zsfx");
+ like($raw[0], qr/\nblah\n\z/s, "original preserved $zsfx");
+
+ local $lei->{opt} = { augment => 1, jobs => 2 };
+ $wcb = PublicInbox::LeiToMail->write_cb($dst, $lei);
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\($dup = $buf . "\ny\n"), 'deadbeef', [ qw(seen) ]);
+ undef $wcb; # commit
+
+ my @raw3;
+ $cat = popen_rd([@$dc_cmd, $f]);
+ PublicInbox::MboxReader->$mbox($cat,
+ sub { push @raw3, shift->as_string });
+ my $y = pop @raw3;
+ is_deeply(\@raw3, \@raw, 'previous messages preserved');
+ like($y, qr/\nblah\n\ny\n\z/s, "augmented $zsfx (atomic)");
+ }
+}
+
+unlink $fn or BAIL_OUT $!;
+if ('default deduplication uses content_hash') {
+ my $wcb = PublicInbox::LeiToMail->write_cb("mboxo:$fn", $lei);
+ $wcb->(\(my $x = $buf), 'deadbeef', []) for (1..2);
+ undef $wcb; # undef to commit changes
+ my $cmp = '';
+ open my $fh, '<', $fn or BAIL_OUT $!;
+ PublicInbox::MboxReader->mboxo($fh, sub { $cmp .= shift->as_string });
+ is($cmp, $buf, 'only one message written');
+
+ local $lei->{opt} = { augment => 1 };
+ $wcb = PublicInbox::LeiToMail->write_cb("mboxo:$fn", $lei);
+ $wcb->(\($x = $buf . "\nx\n"), 'deadbeef', []) for (1..2);
+ undef $wcb; # undef to commit changes
+ open $fh, '<', $fn or BAIL_OUT $!;
+ my @x;
+ PublicInbox::MboxReader->mboxo($fh, sub { push @x, shift->as_string });
+ is(scalar(@x), 2, 'augmented mboxo');
+ is($x[0], $cmp, 'original message preserved');
+ is($x[1], $buf . "\nx\n", 'new message appended');
+}
+
+{ # stdout support
+ open my $tmp, '+>', undef or BAIL_OUT $!;
+ local $lei->{1} = $tmp;
+ my $wcb = PublicInbox::LeiToMail->write_cb("mboxrd:/dev/stdout", $lei);
+ $wcb->(\(my $x = $buf), 'deadbeef', []);
+ undef $wcb; # commit
+ seek($tmp, 0, SEEK_SET) or BAIL_OUT $!;
+ my $cmp = '';
+ PublicInbox::MboxReader->mboxrd($tmp, sub { $cmp .= shift->as_string });
+ is($cmp, $buf, 'message written to stdout');
+}
+
+SKIP: { # FIFO support
+ use POSIX qw(mkfifo);
+ my $fn = "$tmpdir/fifo";
+ mkfifo($fn, 0600) or skip("mkfifo not supported: $!", 1);
+ my $cat = popen_rd([which('cat'), $fn]);
+ my $wcb = PublicInbox::LeiToMail->write_cb("mboxo:$fn", $lei);
+ $wcb->(\(my $x = $buf), 'deadbeef', []);
+ undef $wcb; # commit
+ my $cmp = '';
+ PublicInbox::MboxReader->mboxo($cat, sub { $cmp .= shift->as_string });
+ is($cmp, $buf, 'message written to FIFO');
+}
+
+{ # Maildir support
+ my $md = "$tmpdir/maildir/";
+ my $wcb = PublicInbox::LeiToMail->write_cb("Maildir:$md", $lei);
+ ok($wcb, 'got Maildir callback');
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\(my $x = $buf), 'badc0ffee', []);
+ undef $wcb; # commit
+
+ my @f;
+ PublicInbox::LeiToMail::_maildir_each_file($md, sub { push @f, shift });
+ is(scalar(@f), 1, 'wrote one file');
+ open my $fh, $f[0] or BAIL_OUT $!;
+ is(do { local $/; <$fh> }, $buf, 'wrote to Maildir');
+
+ $wcb = PublicInbox::LeiToMail->write_cb("maildir:$md", $lei);
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\($x = $buf."\nx\n"), 'deadcafe', []);
+ undef $wcb; # commit
+
+ my @x = ();
+ PublicInbox::LeiToMail::_maildir_each_file($md, sub { push @x, shift });
+ is(scalar(@x), 1, 'wrote one new file');
+ ok(!-f $f[0], 'old file clobbered');
+ open $fh, $x[0] or BAIL_OUT $!;
+ is(do { local $/; <$fh> }, $buf."\nx\n", 'wrote new file to Maildir');
+
+ local $lei->{opt}->{augment} = 1;
+ $wcb = PublicInbox::LeiToMail->write_cb("maildir:$md", $lei);
+ $lei->{dedupe}->prepare_dedupe;
+ $wcb->(\($x = $buf."\ny\n"), 'deadcafe', []);
+ $wcb->(\($x = $buf."\ny\n"), 'b4dc0ffee', []); # skipped by dedupe
+ undef $wcb; # commit
+ @f = ();
+ PublicInbox::LeiToMail::_maildir_each_file($md, sub { push @f, shift });
+ is(scalar grep(/\A\Q$x[0]\E\z/, @f), 1, 'old file still there');
+ my @new = grep(!/\A\Q$x[0]\E\z/, @f);
+ is(scalar @new, 1, '1 new file written (b4dc0ffee skipped)');
+ open $fh, $x[0] or BAIL_OUT $!;
+ is(do { local $/; <$fh> }, $buf."\nx\n", 'old file untouched');
+ open $fh, $new[0] or BAIL_OUT $!;
+ is(do { local $/; <$fh> }, $buf."\ny\n", 'new file written');