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#!perl -w
# Copyright (C) 2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
use strict;
use v5.10.1;
use Test::More;
use PublicInbox::TestCommon;
use PublicInbox::Config;
use File::Path qw(rmtree);
require_mods(qw(json DBD::SQLite Search::Xapian));
my $LEI = 'lei';
my $opt = { 1 => \(my $out = ''), 2 => \(my $err = '') };
my $lei = sub {
	my ($cmd, $env, $opt) = @_;
	$out = $err = '';
	if (!ref($cmd)) {
		($env, $opt) = grep { (!defined) || ref } @_;
		$cmd = [ grep { defined } @_ ];
	}
	run_script([$LEI, @$cmd], $env, $opt);
};

my ($home, $for_destroy) = tmpdir();
delete local $ENV{XDG_DATA_HOME};
delete local $ENV{XDG_CONFIG_HOME};
local $ENV{XDG_RUNTIME_DIR} = "$home/xdg_run";
local $ENV{HOME} = $home;
local $ENV{FOO} = 'BAR';
mkdir "$home/xdg_run", 0700 or BAIL_OUT "mkdir: $!";
my $home_trash = [ "$home/.local", "$home/.config" ];
my $cleanup = sub { rmtree([@$home_trash, @_]) };

my $test_help = sub {
	ok(!$lei->([], undef, $opt), 'no args fails');
	is($? >> 8, 1, '$? is 1');
	is($out, '', 'nothing in stdout');
	like($err, qr/^usage:/sm, 'usage in stderr');

	for my $arg (['-h'], ['--help'], ['help'], [qw(daemon-pid --help)]) {
		$out = $err = '';
		ok($lei->($arg, undef, $opt), "lei @$arg");
		like($out, qr/^usage:/sm, "usage in stdout (@$arg)");
		is($err, '', "nothing in stderr (@$arg)");
	}

	for my $arg ([''], ['--halp'], ['halp'], [qw(daemon-pid --halp)]) {
		$out = $err = '';
		ok(!$lei->($arg, undef, $opt), "lei @$arg");
		is($? >> 8, 1, '$? set correctly');
		isnt($err, '', 'something in stderr');
		is($out, '', 'nothing in stdout');
	}
	ok($lei->(qw(init -h), undef, $opt), 'init -h');
	like($out, qr! \Q$home\E/\.local/share/lei/store\b!,
		'actual path shown in init -h');
	ok($lei->(qw(init -h), { XDG_DATA_HOME => '/XDH' }, $opt),
		'init with XDG_DATA_HOME');
	like($out, qr! /XDH/lei/store\b!, 'XDG_DATA_HOME in init -h');
	is($err, '', 'no errors from init -h');

	ok($lei->(qw(config -h), undef, $opt), 'config-h');
	like($out, qr! \Q$home\E/\.config/lei/config\b!,
		'actual path shown in config -h');
	ok($lei->(qw(config -h), { XDG_CONFIG_HOME => '/XDC' }, $opt),
		'config with XDG_CONFIG_HOME');
	like($out, qr! /XDC/lei/config\b!, 'XDG_CONFIG_HOME in config -h');
	is($err, '', 'no errors from config -h');
};

my $ok_err_info = sub {
	my ($msg) = @_;
	is(grep(!/^I:/, split(/^/, $err)), 0, $msg) or
		diag "$msg: err=$err";
	$err = '';
};

my $test_init = sub {
	$cleanup->();
	ok($lei->(['init'], undef, $opt), 'init w/o args');
	$ok_err_info->('after init w/o args');
	ok($lei->(['init'], undef, $opt), 'idempotent init w/o args');
	$ok_err_info->('after idempotent init w/o args');

	ok(!$lei->(['init', "$home/x"], undef, $opt),
		'init conflict');
	is(grep(/^E:/, split(/^/, $err)), 1, 'got error on conflict');
	ok(!-e "$home/x", 'nothing created on conflict');
	$cleanup->();

	ok($lei->(['init', "$home/x"], undef, $opt), 'init conflict resolved');
	$ok_err_info->('init w/ arg');
	ok($lei->(['init', "$home/x"], undef, $opt), 'init idempotent w/ path');
	$ok_err_info->('init idempotent w/ arg');
	ok(-d "$home/x", 'created dir');
	$cleanup->("$home/x");

	ok(!$lei->(['init', "$home/x", "$home/2" ], undef, $opt),
		'too many args fails');
	like($err, qr/too many/, 'noted excessive');
	ok(!-e "$home/x", 'x not created on excessive');
	for my $d (@$home_trash) {
		my $base = (split(m!/!, $d))[-1];
		ok(!-d $d, "$base not created");
	}
	is($out, '', 'nothing in stdout on init failure');
};

my $test_config = sub {
	$cleanup->();
	ok($lei->([qw(config a.b c)], undef, $opt), 'config set var');
	is($out.$err, '', 'no output on var set');
	ok($lei->([qw(config -l)], undef, $opt), 'config -l');
	is($err, '', 'no errors on listing');
	is($out, "a.b=c\n", 'got expected output');
	ok(!$lei->([qw(config -f), "$home/.config/f", qw(x.y z)], undef, $opt),
			'config set var with -f fails');
	like($err, qr/not supported/, 'not supported noted');
	ok(!-f "$home/config/f", 'no file created');
};

my $test_lei_common = sub {
	$test_help->();
	$test_config->();
	$test_init->();
};

my $test_lei_oneshot = $ENV{TEST_LEI_ONESHOT};
SKIP: {
	last SKIP if $test_lei_oneshot;
	require_mods(qw(IO::FDPass Cwd), 41);
	my $sock = "$ENV{XDG_RUNTIME_DIR}/lei/sock";

	ok(run_script([qw(lei daemon-pid)], undef, $opt), 'daemon-pid');
	is($err, '', 'no error from daemon-pid');
	like($out, qr/\A[0-9]+\n\z/s, 'pid returned') or BAIL_OUT;
	chomp(my $pid = $out);
	ok(kill(0, $pid), 'pid is valid');
	ok(-S $sock, 'sock created');

	$test_lei_common->();

	$out = '';
	ok(run_script([qw(lei daemon-pid)], undef, $opt), 'daemon-pid');
	chomp(my $pid_again = $out);
	is($pid, $pid_again, 'daemon-pid idempotent');

	$out = '';
	ok(run_script([qw(lei daemon-env -0)], undef, $opt), 'show env');
	is($err, '', 'no errors in env dump');
	my @env = split(/\0/, $out);
	is(scalar grep(/\AHOME=\Q$home\E\z/, @env), 1, 'env has HOME');
	is(scalar grep(/\AFOO=BAR\z/, @env), 1, 'env has FOO=BAR');
	is(scalar grep(/\AXDG_RUNTIME_DIR=/, @env), 1, 'has XDG_RUNTIME_DIR');

	$out = '';
	ok(run_script([qw(lei daemon-env -u FOO)], undef, $opt), 'unset');
	is($out.$err, '', 'no output for unset');
	ok(run_script([qw(lei daemon-env -0)], undef, $opt), 'show again');
	is($err, '', 'no errors in env dump');
	@env = split(/\0/, $out);
	is(scalar grep(/\AFOO=BAR\z/, @env), 0, 'env unset FOO');

	$out = '';
	ok(run_script([qw(lei daemon-env -u FOO -u HOME -u XDG_RUNTIME_DIR)],
			undef, $opt), 'unset multiple');
	is($out.$err, '', 'no errors output for unset');
	ok(run_script([qw(lei daemon-env -0)], undef, $opt), 'show again');
	is($err, '', 'no errors in env dump');
	@env = split(/\0/, $out);
	is(scalar grep(/\A(?:HOME|XDG_RUNTIME_DIR)=\z/, @env), 0, 'env unset@');
	$out = '';
	ok(run_script([qw(lei daemon-env -)], undef, $opt), 'clear env');
	is($out.$err, '', 'no output');
	ok(run_script([qw(lei daemon-env)], undef, $opt), 'env is empty');
	is($out, '', 'env cleared');

	ok(run_script([qw(lei daemon-stop)], undef, $opt), 'daemon-stop');
	is($out, '', 'no output from daemon-stop');
	is($err, '', 'no error from daemon-stop');
	for (0..100) {
		kill(0, $pid) or last;
		tick();
	}
	ok(!-S $sock, 'sock gone');
	ok(!kill(0, $pid), 'pid gone after stop');

	ok(run_script([qw(lei daemon-pid)], undef, $opt), 'daemon-pid');
	chomp(my $new_pid = $out);
	ok(kill(0, $new_pid), 'new pid is running');
	ok(-S $sock, 'sock exists again');

	if ('socket inaccessible') {
		chmod 0000, $sock or BAIL_OUT "chmod 0000: $!";
		$out = $err = '';
		ok(run_script([qw(lei help)], undef, $opt),
			'connect fail, one-shot fallback works');
		like($err, qr/\bconnect\(/, 'connect error noted');
		like($out, qr/^usage: /, 'help output works');
		chmod 0700, $sock or BAIL_OUT "chmod 0700: $!";
	}
	if ('oneshot on cwd gone') {
		my $cwd = Cwd::fastcwd() or BAIL_OUT "fastcwd: $!";
		my $d = "$home/to-be-removed";
		mkdir $d or BAIL_OUT "mkdir($d) $!";
		chdir $d or BAIL_OUT "chdir($d) $!";
		if (rmdir($d)) {
			$out = $err = '';
			ok(run_script([qw(lei help)], undef, $opt),
				'cwd fail, one-shot fallback works');
		} else {
			$err = "rmdir=$!";
		}
		chdir $cwd or BAIL_OUT "chdir($cwd) $!";
		like($err, qr/cwd\(/, 'cwd error noted');
		like($out, qr/^usage: /, 'help output still works');
	}

	unlink $sock or BAIL_OUT "unlink($sock) $!";
	for (0..100) {
		kill('CHLD', $new_pid) or last;
		tick();
	}
	ok(!kill(0, $new_pid), 'daemon exits after unlink');
	# success over socket, can't test without
	$test_lei_common = undef;
};

require_ok 'PublicInbox::LEI';
$LEI = 'lei-oneshot' if $test_lei_oneshot;
$test_lei_common->() if $test_lei_common;

done_testing;
debug log:

solving cce90fff ...
found cce90fff in public-inbox.git

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