1 files changed, 34 insertions, 0 deletions
diff --git a/lib/PublicInbox/Aspawn.pm b/lib/PublicInbox/Aspawn.pm
new file mode 100644
index 00000000..49f8651a
--- /dev/null
+++ b/lib/PublicInbox/Aspawn.pm
@@ -0,0 +1,34 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# async system()/qx() which takes callback
+package PublicInbox::Aspawn;
+use v5.12;
+use parent qw(Exporter);
+use PublicInbox::DS qw(awaitpid);
+use PublicInbox::Spawn qw(spawn);
+our @EXPORT_OK = qw(run_await);
+
+sub _await_cb { # awaitpid cb
+        my ($pid, $cmd, $env, $opt, $cb, @args) = @_;
+        PublicInbox::Spawn::read_out_err($opt);
+        if ($? && !$opt->{quiet}) {
+                my ($status, $sig) = ($? >> 8, $? & 127);
+                my $msg = '';
+                $msg .= " (-C=$opt->{-C})" if defined $opt->{-C};
+                $msg .= " status=$status" if $status;
+                $msg .= " signal=$sig" if $sig;
+                warn "E: @$cmd", $msg, "\n";
+        }
+        $cb->($pid, $cmd, $env, $opt, @args) if $cb;
+}
+
+sub run_await {
+        my ($cmd, $env, $opt, $cb, @args) = @_;
+        $opt->{1} //= \(my $out);
+        my $pid = spawn($cmd, $env, $opt);
+        awaitpid($pid, \&_await_cb, $cmd, $env, $opt, $cb, @args);
+        awaitpid($pid); # synchronous for non-$in_loop
+}
+
+1;