Split do_packagedata task from do_package

Currently, do_rootfs has a dependency on all the do_package output being present
due to its usage of the pkgdata directories. This means that if you run:

bitbake xxxx-image -c rootfs

you end up having to fetch and unpack all the do_package data which is usually
large and inefficient. It also means rm_work has to leave all the do_package
data lying around so rootfs works.

This patch splits the actual creation of the pkgdata directory off into a separate
task, "packagedata" which happens immediately after do_package. We can then remap
the dependencies so this task is depended upon, not do_package. Sstate can then be
programmed not to require do_package at the appropriate times.

Whilst this patch doesn't do so, it opens the possibility of rm_work wiping
out the do_package output from WORKDIR as long as it also removed the do_package
stamp (both normal and setscene variants) and allowing more space savings
with rm_work which has been regularly requested.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 20 insertions, 5 deletions

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index 60d3df7789..e8d7aefd86 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -217,7 +217,7 @@ python () {
         d.appendVarFlag('do_package', 'depends', deps)
 
         # shlibs requires any DEPENDS to have already packaged for the *.list files
-        d.appendVarFlag('do_package', 'deptask', " do_package")
+        d.appendVarFlag('do_package', 'deptask', " do_packagedata")
 
     elif not bb.data.inherits_class('image', d):
         d.setVar("PACKAGERDEPTASK", "")
@@ -1900,9 +1900,7 @@ PACKAGELOCK = "${STAGING_DIR}/package-output.lock"
 SSTATETASKS += "do_package"
 do_package[sstate-name] = "package"
 do_package[cleandirs] = "${PKGDESTWORK}"
-do_package[sstate-plaindirs] = "${PKGD} ${PKGDEST}"
-do_package[sstate-inputdirs] = "${PKGDESTWORK}"
-do_package[sstate-outputdirs] = "${PKGDATA_DIR}"
+do_package[sstate-plaindirs] = "${PKGD} ${PKGDEST} ${PKGDESTWORK}"
 do_package[sstate-lockfile-shared] = "${PACKAGELOCK}"
 do_package_setscene[dirs] = "${STAGING_DIR}"
 
@@ -1911,6 +1909,23 @@ python do_package_setscene () {
 }
 addtask do_package_setscene
 
+do_packagedata () {
+	:
+}
+
+addtask packagedata before do_build after do_package
+
+SSTATETASKS += "do_packagedata"
+do_packagedata[sstate-name] = "packagedata"
+do_packagedata[sstate-inputdirs] = "${PKGDESTWORK}"
+do_packagedata[sstate-outputdirs] = "${PKGDATA_DIR}"
+do_packagedata[sstate-lockfile-shared] = "${PACKAGELOCK}"
+
+python do_packagedata_setscene () {
+    sstate_setscene(d)
+}
+addtask do_packagedata_setscene
+
 # Dummy task to mark when all packaging is complete
 do_package_write () {
 	:
@@ -1918,7 +1933,7 @@ do_package_write () {
 do_package_write[noexec] = "1"
 PACKAGERDEPTASK = "do_package_write"
 do_build[recrdeptask] += "${PACKAGERDEPTASK}"
-addtask package_write before do_build after do_package
+addtask package_write before do_build after do_packagedata
 
 #
 # Helper functions for the package writing classes