[PATCH 2/2] isar-bootstrap: Change task dependencies to improve parallelization

[claudius.heine.ext@siemens.com]

From: Claudius Heine <ch@denx.de>

The isar-bootstrap tasks are currently ordered linearly. This patch
changes this to better model the real dependencies between them. Now
some tasks are executed in parallel if possible. This should slightly
improve the performance.

In detail 'do_apt_config_prepare' can be executed in parallel to
'do_generate_keyring' and 'do_bootstrap'. 'do_apt_config_install' has to
be executed after 'do_bootstrap' and 'do_apt_config_prepare'.

Signed-off-by: Claudius Heine <ch@denx.de>
---
 meta/recipes-core/isar-bootstrap/isar-bootstrap.bb | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/meta/recipes-core/isar-bootstrap/isar-bootstrap.bb b/meta/recipes-core/isar-bootstrap/isar-bootstrap.bb
index 3fbf890..aae760e 100644
--- a/meta/recipes-core/isar-bootstrap/isar-bootstrap.bb
+++ b/meta/recipes-core/isar-bootstrap/isar-bootstrap.bb
@@ -162,6 +162,7 @@ do_generate_keyring() {
 addtask generate_keyring before do_build after do_unpack
 
 do_apt_config_prepare[stamp-extra-info] = "${DISTRO}-${DISTRO_ARCH}"
+do_apt_config_prepare[dirs] = "${WORKDIR}"
 do_apt_config_prepare[vardeps] += "\
                                    APTPREFS \
                                    DISTRO_APT_PREFERENCES \
@@ -180,7 +181,7 @@ python do_apt_config_prepare() {
 
     aggregate_aptsources_list(d, apt_sources_list, apt_sources_out)
 }
-addtask apt_config_prepare before do_build after do_generate_keyring
+addtask apt_config_prepare before do_build after do_unpack
 
 do_bootstrap[stamp-extra-info] = "${DISTRO}-${DISTRO_ARCH}"
 do_bootstrap[vardeps] += "DISTRO_APT_SOURCES"
@@ -201,7 +202,7 @@ do_bootstrap() {
                              "${ROOTFSDIR}" \
                              "${@get_distro_source(d)}"
 }
-addtask bootstrap before do_build after do_apt_config_prepare
+addtask bootstrap before do_build after do_generate_keyring
 
 do_apt_config_install[stamp-extra-info] = "${DISTRO}-${DISTRO_ARCH}"
 do_apt_config_install() {
@@ -216,7 +217,7 @@ do_apt_config_install() {
     sudo install -v -m644 "${WORKDIR}/isar-apt.conf" \
                           "${ROOTFSDIR}/etc/apt/apt.conf.d/50isar.conf"
 }
-addtask apt_config_install before do_build after do_bootstrap
+addtask apt_config_install before do_build after do_bootstrap do_apt_config_prepare
 
 do_apt_update[stamp-extra-info] = "${DISTRO}-${DISTRO_ARCH}"
 do_apt_update() {
-- 
2.16.3