[OE-core] [PATCH 2/2] package: Fix race between do_package and do_packagedata

[Richard Purdie]

do_package has PKGDESTWORK as a cleandir and do_packagedata has it as an sstate-input
dir. This means do_package wipes out the directory at both do_package and do_package_setscene.

do_package_setscene and do_packagedata_setscene can run in parallel when installing from
sstate which means they can wipe out parts of each other leading to interesting
build failures.

We therefore have to add in a hardlink copy so that the directories can work independently
of each other.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/classes/package.bbclass | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index e67bb5bd97d..114d6559f5e 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -2252,14 +2252,18 @@ python do_package_setscene () {
 }
 addtask do_package_setscene
 
-do_packagedata () {
-	:
+# Copy from PKGDESTWORK to tempdirectory as tempdirectory can be cleaned at both
+# do_package_setscene and do_packagedata_setscene leading to races
+python do_packagedata () {
+    src = d.expand("${PKGDESTWORK}")
+    dest = d.expand("${WORKDIR}/pkgdata-pdata-input")
+    oe.path.copyhardlinktree(src, dest)
 }
 
 addtask packagedata before do_build after do_package
 
 SSTATETASKS += "do_packagedata"
-do_packagedata[sstate-inputdirs] = "${PKGDESTWORK}"
+do_packagedata[sstate-inputdirs] = "${WORKDIR}/pkgdata-pdata-input"
 do_packagedata[sstate-outputdirs] = "${PKGDATA_DIR}"
 do_packagedata[stamp-extra-info] = "${MACHINE_ARCH}"
 
-- 
2.20.1