From 5d8dbb4aca5afcc6b98a4d951f03003fb7eaf356 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@yhbt.net>
Date: Sat, 25 Apr 2020 05:52:21 +0000
Subject: testcommon: introduce mime_load sub

We'll use this to create, memoize, and reuse .eml files.  This
will be used to reduce (and eventually eliminate) our dependency
on Email::MIME in tests.
---
 lib/PublicInbox/TestCommon.pm | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index b50871e8..ac14d27b 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -9,7 +9,30 @@ use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD :seek);
 use POSIX qw(dup2);
 use IO::Socket::INET;
 our @EXPORT = qw(tmpdir tcp_server tcp_connect require_git require_mods
-	run_script start_script key2sub xsys xqx);
+	run_script start_script key2sub xsys xqx mime_load);
+
+sub mime_load ($;&) {
+	my ($path, $cb) = @_;
+	if (open(my $fh, '<', $path)) {
+		PublicInbox::MIME->new(\(do { local $/; <$fh> }));
+	} elsif ($cb) {
+		require File::Temp;
+
+		my $mime = $cb->();
+		my ($dir) = ($path =~ m!(.+)/(?:[^/]+)\z!);
+		-d $dir or die "BUG: dir=$dir is not the dir of $path";
+		my $fh = File::Temp->new(DIR => $dir);
+		$fh->autoflush(1);
+		print $fh $mime->as_string or die "print: $!";
+		my $fn = $fh->filename;
+		rename($fn, $path) or die "link $fn => $path: $!";
+		$fh->unlink_on_destroy(0);
+		pop @_; # retry via tail recursion
+		goto &mime_load;
+	} else {
+		die "open $path: $!";
+	}
+}
 
 sub tmpdir (;$) {
 	my ($base) = @_;
-- 
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