[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7900/8267] sign_rpm.bbclass: force rpm serial signing

[Emmanuele Bassi <ebassi src gnome org>]

commit 043d9ac0ae441e9a7e2ea8934bfc595a03ef9a52
Author: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
Date:   Mon Sep 25 13:52:59 2017 -0700

    sign_rpm.bbclass: force rpm serial signing
    
    Newer versions of gpg (at least 2.1.5 and 2.2.1) have issues when signing occurs in parallel
    so (unfortunately) the signing must be done serially. Once the upstream problem is fixed,
    this patch must be reverted, otherwise we loose all the intrinsic parallelism from
    bitbake.
    
    [YOCTO #12022]
    
    (From OE-Core rev: 5301712f9735fcf8d3dec756772668de930e53fe)
    
    Signed-off-by: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/sign_rpm.bbclass |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/meta/classes/sign_rpm.bbclass b/meta/classes/sign_rpm.bbclass
index 6796780..4961b03 100644
--- a/meta/classes/sign_rpm.bbclass
+++ b/meta/classes/sign_rpm.bbclass
@@ -67,3 +67,9 @@ python sign_rpm () {
 
 do_package_index[depends] += "signing-keys:do_deploy"
 do_rootfs[depends] += "signing-keys:do_populate_sysroot"
+
+# Newer versions of gpg (at least 2.1.5 and 2.2.1) have issues when signing occurs in parallel
+# so unfortunately the signing must be done serially. Once the upstream problem is fixed,
+# the following line must be removed otherwise we loose all the intrinsic parallelism from
+# bitbake.  For more information, check https://bugzilla.yoctoproject.org/show_bug.cgi?id=12022.
+do_package_write_rpm[lockfiles] += "${TMPDIR}/gpg.lock"