# Copyright (C) 2015-2019 all contributors
# License: AGPL-3.0+
use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD :seek);
use POSIX qw(dup2);
use strict;
use warnings;
use IO::Socket::INET;
sub tmpdir (;$) {
my ($base) = @_;
require File::Temp;
unless (defined $base) {
($base) = ($0 =~ m!\b([^/]+)\.[^\.]+\z!);
}
my $tmpdir = File::Temp->newdir("pi-$base-$$-XXXXXX", TMPDIR => 1);
($tmpdir->dirname, $tmpdir);
}
sub tcp_server () {
IO::Socket::INET->new(
LocalAddr => '127.0.0.1',
ReuseAddr => 1,
Proto => 'tcp',
Type => Socket::SOCK_STREAM(),
Listen => 1024,
Blocking => 0,
)
}
sub tcp_connect {
my ($dest, %opt) = @_;
my $s = IO::Socket::INET->new(
Proto => 'tcp',
Type => Socket::SOCK_STREAM(),
PeerAddr => $dest->sockhost . ':' . $dest->sockport,
%opt,
);
$s->autoflush(1);
$s;
}
sub require_git ($;$) {
my ($req, $maybe) = @_;
my ($req_maj, $req_min) = split(/\./, $req);
my ($cur_maj, $cur_min) = (`git --version` =~ /version (\d+)\.(\d+)/);
my $req_int = ($req_maj << 24) | ($req_min << 16);
my $cur_int = ($cur_maj << 24) | ($cur_min << 16);
if ($cur_int < $req_int) {
return 0 if $maybe;
plan skip_all => "git $req+ required, have $cur_maj.$cur_min";
}
1;
}
sub key2script ($) {
my ($key) = @_;
return $key if $key =~ m!\A/!;
# n.b. we may have scripts which don't start with "public-inbox" in
# the future:
$key =~ s/\A([-\.])/public-inbox$1/;
'blib/script/'.$key;
}
sub _prepare_redirects ($) {
my ($fhref) = @_;
my @x = ([ \*STDIN, '<&' ], [ \*STDOUT, '>&' ], [ \*STDERR, '>&' ]);
for (my $fd = 0; $fd <= $#x; $fd++) {
my $fh = $fhref->[$fd] or next;
my ($oldfh, $mode) = @{$x[$fd]};
open $oldfh, $mode, $fh or die "$$oldfh $mode redirect: $!";
}
}
# $opt->{run_mode} (or $ENV{TEST_RUN_MODE}) allows chosing between
# three ways to spawn our own short-lived Perl scripts for testing:
#
# 0 - (fork|vfork) + execve, the most realistic but slowest
# 1 - preloading and running in a forked subprocess (fast)
# 2 - preloading and running in current process (slightly faster than 1)
#
# 2 is not compatible with scripts which use "exit" (which we'll try to
# avoid in the future).
# The default is 2.
our $run_script_exit_code;
sub RUN_SCRIPT_EXIT () { "RUN_SCRIPT_EXIT\n" };
sub run_script_exit (;$) {
$run_script_exit_code = $_[0] // 0;
die RUN_SCRIPT_EXIT;
}
my %cached_scripts;
sub key2sub ($) {
my ($key) = @_;
$cached_scripts{$key} //= do {
my $f = key2script($key);
open my $fh, '<', $f or die "open $f: $!";
my $str = do { local $/; <$fh> };
my ($fc, $rest) = ($key =~ m/([a-z])([a-z0-9]+)\z/);
$fc = uc($fc);
my $pkg = "PublicInbox::TestScript::$fc$rest";
eval <can('main');
}
}
sub _run_sub ($$$) {
my ($sub, $key, $argv) = @_;
local @ARGV = @$argv;
$run_script_exit_code = undef;
my $exit_code = eval { $sub->(@$argv) };
if ($@ eq RUN_SCRIPT_EXIT) {
$@ = '';
$exit_code = $run_script_exit_code;
$? = ($exit_code << 8);
} elsif (defined($exit_code)) {
$? = ($exit_code << 8);
} elsif ($@) { # mimic die() behavior when uncaught
warn "E: eval-ed $key: $@\n";
$? = ($! << 8) if $!;
$? = (255 << 8) if $? == 0;
} else {
die "BUG: eval-ed $key: no exit code or \$@\n";
}
}
sub run_script ($;$$) {
my ($cmd, $env, $opt) = @_;
my ($key, @argv) = @$cmd;
my $run_mode = $ENV{TEST_RUN_MODE} // $opt->{run_mode} // 1;
my $sub = $run_mode == 0 ? undef : key2sub($key);
my $fhref = [];
my $spawn_opt = {};
for my $fd (0..2) {
my $redir = $opt->{$fd};
next unless ref($redir);
open my $fh, '+>', undef or die "open: $!";
$fhref->[$fd] = $fh;
$spawn_opt->{$fd} = fileno($fh);
next if $fd > 0;
$fh->autoflush(1);
print $fh $$redir or die "print: $!";
seek($fh, 0, SEEK_SET) or die "seek: $!";
}
if ($run_mode == 0) {
# spawn an independent new process, like real-world use cases:
require PublicInbox::Spawn;
my $cmd = [ key2script($key), @argv ];
my $pid = PublicInbox::Spawn::spawn($cmd, $env, $spawn_opt);
defined($pid) or die "spawn: $!";
if (defined $pid) {
my $r = waitpid($pid, 0);
defined($r) or die "waitpid: $!";
$r == $pid or die "waitpid: expected $pid, got $r";
}
} else { # localize and run everything in the same process:
local *STDIN = *STDIN;
local *STDOUT = *STDOUT;
local *STDERR = *STDERR;
local %ENV = $env ? (%ENV, %$env) : %ENV;
local %SIG = %SIG;
local $0 = join(' ', @$cmd);
_prepare_redirects($fhref);
_run_sub($sub, $key, \@argv);
}
# slurp the redirects back into user-supplied strings
for my $fd (1..2) {
my $fh = $fhref->[$fd] or next;
seek($fh, 0, SEEK_SET) or die "seek: $!";
my $redir = $opt->{$fd};
local $/;
$$redir = <$fh>;
}
$? == 0;
}
sub wait_for_tail () { sleep(2) }
sub start_script {
my ($cmd, $env, $opt) = @_;
my ($key, @argv) = @$cmd;
my $run_mode = $ENV{TEST_RUN_MODE} // $opt->{run_mode} // 1;
my $sub = $run_mode == 0 ? undef : key2sub($key);
my $tail_pid;
if (my $tail_cmd = $ENV{TAIL}) {
my @paths;
for (@argv) {
next unless /\A--std(?:err|out)=(.+)\z/;
push @paths, $1;
}
if (@paths) {
defined($tail_pid = fork) or die "fork: $!\n";
if ($tail_pid == 0) {
# make sure files exist, first
open my $fh, '>>', $_ for @paths;
open(STDOUT, '>&STDERR') or die "1>&2: $!";
exec(split(' ', $tail_cmd), @paths);
die "$tail_cmd failed: $!";
}
wait_for_tail();
}
}
defined(my $pid = fork) or die "fork: $!\n";
if ($pid == 0) {
# pretend to be systemd (cf. sd_listen_fds(3))
# 3 == SD_LISTEN_FDS_START
my $fd;
for ($fd = 0; 1; $fd++) {
my $s = $opt->{$fd};
last if $fd >= 3 && !defined($s);
next unless $s;
my $fl = fcntl($s, F_GETFD, 0);
if (($fl & FD_CLOEXEC) != FD_CLOEXEC) {
warn "got FD:".fileno($s)." w/o CLOEXEC\n";
}
fcntl($s, F_SETFD, $fl &= ~FD_CLOEXEC);
dup2(fileno($s), $fd) or die "dup2 failed: $!\n";
}
%ENV = (%ENV, %$env) if $env;
my $fds = $fd - 3;
if ($fds > 0) {
$ENV{LISTEN_PID} = $$;
$ENV{LISTEN_FDS} = $fds;
}
$0 = join(' ', @$cmd);
if ($sub) {
_run_sub($sub, $key, \@argv);
POSIX::_exit($? >> 8);
} else {
exec(key2script($key), @argv);
die "FAIL: ",join(' ', $key, @argv), ": $!\n";
}
}
TestProcess->new($pid, $tail_pid);
}
package TestProcess;
use strict;
# prevent new threads from inheriting these objects
sub CLONE_SKIP { 1 }
sub new {
my ($klass, $pid, $tail_pid) = @_;
bless { pid => $pid, tail_pid => $tail_pid, owner => $$ }, $klass;
}
sub kill {
my ($self, $sig) = @_;
CORE::kill($sig // 'TERM', $self->{pid});
}
sub join {
my ($self) = @_;
my $pid = delete $self->{pid} or return;
my $ret = waitpid($pid, 0);
defined($ret) or die "waitpid($pid): $!";
$ret == $pid or die "waitpid($pid) != $ret";
}
sub DESTROY {
my ($self) = @_;
return if $self->{owner} != $$;
if (my $tail = delete $self->{tail_pid}) {
::wait_for_tail();
CORE::kill('TERM', $tail);
}
my $pid = delete $self->{pid} or return;
CORE::kill('TERM', $pid);
}
1;