From b2fa9c8271b752a5e243f40479039da0318d3548 Mon Sep 17 00:00:00 2001
From: Pascal Terjan <pterjan@mageia.org>
Date: Thu, 19 Jan 2023 20:16:19 +0000
Subject: iurt: Add support for DynamicBuildRequires

See https://fedoraproject.org/wiki/Changes/DynamicBuildRequires
---
 NEWS              |  2 ++
 iurt              |  6 ++++++
 lib/Iurt/Urpmi.pm | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 70 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index 1016a8f..d037983 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,5 @@
+- iurt: Add support for DynamicBuildRequires
+
 0.7.18
 - ulri: Fix false positives of iurt dying on the build machine
 - iurt: Fix cleaning chroots (eg: when using --clean-all)
diff --git a/iurt b/iurt
index 2489d03..c797848 100755
--- a/iurt
+++ b/iurt
@@ -795,6 +795,12 @@ retry:
 	return $srpm;
     }
 
+    $ok = $urpmi->install_dynamic_buildrequires(\%run, $config, $chroot_tmp, '', $luser, $spec, $srpm);
+    if (!$ok) {
+	$run{status}{$srpm} ||= 'install_deps_failure';
+	return $srpm;
+    }
+
     perform_command("rpm --root $chroot_tmp -qa | sort", 
 		    \%run, $config,
 		    logname => "rpm_qa", 
diff --git a/lib/Iurt/Urpmi.pm b/lib/Iurt/Urpmi.pm
index 7d079ea..0f084c9 100644
--- a/lib/Iurt/Urpmi.pm
+++ b/lib/Iurt/Urpmi.pm
@@ -385,13 +385,13 @@ sub install_packages {
 
     @to_install or return 1;
 
-    (my $log_dirname = $title) =~ s/.*:(.*)\.src.rpm/$1/;
+    (my $log_dirname = $title) =~ s/^[^:]*:?([^:]*)\.(buildreqs\.nosrc|src).rpm/$1/;
 
     my $log_spool = "$local_spool/log/$log_dirname/";
 
     mkdir $log_spool;
 
-    my @rpm = grep { !/\.src\.rpm$/ } @to_install;
+    my @rpm = grep { !/src\.rpm$/ } @to_install;
 
     if ($opt->{check}
 		&& -f "$chroot_tmp/bin/rpm"
@@ -553,4 +553,64 @@ sub recreate_srpm {
     ($ret, "$prefix$new_srpm", $spec);
 }
 
+# return ("exit_code", srpm, spec)
+sub install_dynamic_buildrequires {
+    my ($self, $run, $config, $chroot_tmp, $dir, $luser, $spec, $srpm) = @_;
+    my $program_name = $run->{program_name};
+    my $with_flags = $run->{with_flags};
+
+    plog('INFO', "handling dynamic buildrequires");
+
+    if (`rpm -qp --requires "$chroot_tmp/home/$luser/rpmbuild/SRPMS/$srpm"` !~ /rpmlib\(DynamicBuildRequires\)/) {
+	plog('DEBUG', "DynamicBuildRequires not required for $srpm");
+	return 1;
+    }
+
+    my $nosrc = $srpm =~ s/src.rpm$/buildreqs.nosrc.rpm/r;
+
+    while (1) {
+	# There is no way with perform_command to get the actual error code.
+	# We can however tell it that error 11 (missing BuildRequires) is ok so
+	# that we get an error if it fails for any other reason.
+	my $ret = perform_command(qq(chroot $chroot_tmp su $luser -c "rpmbuild -br $with_flags /home/$luser/rpmbuild/SPECS/$spec"),
+	    $run, $config,
+	    use_iurt_root_command => 1,
+	    mail => $config->{admin},
+	    error => "[DYNAMIC BUILDREQUIRES] cannot create $srpm in $chroot_tmp",
+	    debug_mail => $run->{debug},
+	    hash => "generatebuildrequires_$srpm",
+	    error_ok => [11]
+	);
+
+	return 1 if $ret;
+
+	# Unfortunately iurt_root_command hides the original error code so
+	# we need to find out if the file was created rather than relying on
+	# the command exiting with 11.
+	if (-f "$chroot_tmp/home/$luser/rpmbuild/SRPMS/$nosrc") {
+	    plog("INFO: Some dynamic BuildRequires are missing");
+	    my @packages = ("$chroot_tmp/home/$luser/rpmbuild/SRPMS/$nosrc");
+	    if (!$self->install_packages(
+		$nosrc,
+		$chroot_tmp,
+		$run->{local_spool},
+		'dynamic_buildrequires',
+		"[DYNAMIC BUILDREQUIRES] installation of dynamic BuildRequires failed for $srpm on $run->{my_arch}",
+		{},
+		@packages
+	    )) {
+		plog('ERROR', "Failed to install dynamic BuildRequires.");
+		return 0;
+	    }
+	    # TODO: Have a max retry counter for safety
+	    # Delete the file if it exists so that we know if it got created again
+	    unlink("$chroot_tmp/home/$luser/rpmbuild/SRPMS/$nosrc");
+	} else {
+	    # This was a failure for another reason, no point retrying
+	    plog('ERROR', "Failed to generate dynamic BuildRequires.");
+	    return 0;
+	}
+    }
+}
+
 1;
-- 
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