[PATCH v2 1/1] Add proxy support to isar-image-*.bb and buildchroot.bb

["Andreas J. Reichel" <andreas.reichel.ext@siemens.com>]

From: Andreas Reichel <andreas.reichel.ext@siemens.com>

* BB_ENV_EXTRAWHITE provides a list for variables that are kept in the
environment by bitbake. However, isar init script clears any additional
settings. Thus, add proxy variables to BB_ENV_EXTRAWHITE in
isar-buildenv-internal.

* Bitbake clears environment variables for each task within a recipe.
However, bb.utils.export_proxies function can be used with an
inline-python call to reexport the proxy settings.

* Sudo loses environment variables again, thus call multistrap with sudo
with the -E option to preserve (the already cleaned) environment for the
task's multistrap command.

Note:
Downloads are normally done by the fetcher task, which calls a python
function that in turn uses bb.util.export_proxies. However we have a
non-fetcher task, which needs download capabilities as well.

Signed-off-by: Andreas Reichel <andreas.reichel.ext@siemens.com>
---
 meta-isar/recipes-core/images/isar-image-base.bb | 5 ++++-
 meta/recipes-devtools/buildchroot/buildchroot.bb | 4 +++-
 scripts/isar-buildenv-internal                   | 2 +-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/meta-isar/recipes-core/images/isar-image-base.bb b/meta-isar/recipes-core/images/isar-image-base.bb
index b679d97..96b5510 100644
--- a/meta-isar/recipes-core/images/isar-image-base.bb
+++ b/meta-isar/recipes-core/images/isar-image-base.bb
@@ -24,6 +24,8 @@ IMAGE_ROOTFS = "${S}"
 do_rootfs[stamp-extra-info] = "${MACHINE}-${DISTRO}"
 
 do_rootfs() {
+    E="${@ bb.utils.export_proxies(d)}"
+
     install -d -m 755 ${WORKDIR}/hooks_multistrap
 
     # Copy config file
@@ -46,7 +48,8 @@ do_rootfs() {
     cd ${TOPDIR}
 
     # Create root filesystem
-    sudo multistrap -a ${DISTRO_ARCH} -d "${S}" -f "${WORKDIR}/multistrap.conf" || true
+    # We must use sudo -E here to preserve the environment because of proxy settings
+    sudo -E multistrap -a ${DISTRO_ARCH} -d "${S}" -f "${WORKDIR}/multistrap.conf" || true
 
     # Configure root filesystem
     sudo chroot ${S} /configscript.sh ${MACHINE_SERIAL} ${BAUDRATE_TTY} \
diff --git a/meta/recipes-devtools/buildchroot/buildchroot.bb b/meta/recipes-devtools/buildchroot/buildchroot.bb
index ccba683..e251a8f 100644
--- a/meta/recipes-devtools/buildchroot/buildchroot.bb
+++ b/meta/recipes-devtools/buildchroot/buildchroot.bb
@@ -26,6 +26,8 @@ WORKDIR = "${TMPDIR}/work/${PF}/${DISTRO}"
 do_build[stamp-extra-info] = "${DISTRO}-${DISTRO_ARCH}"
 
 do_build() {
+    E="${@ bb.utils.export_proxies(d)}"
+
     install -d -m 755 ${WORKDIR}/hooks_multistrap
 
     # Copy config files
@@ -48,7 +50,7 @@ do_build() {
     cd ${TOPDIR}
 
     # Create root filesystem
-    sudo multistrap -a ${DISTRO_ARCH} -d "${BUILDCHROOT_DIR}" -f "${WORKDIR}/multistrap.conf" || true
+    sudo -E multistrap -a ${DISTRO_ARCH} -d "${BUILDCHROOT_DIR}" -f "${WORKDIR}/multistrap.conf" || true
 
     # Install package builder script
     sudo install -m 755 ${THISDIR}/files/build.sh ${BUILDCHROOT_DIR}
diff --git a/scripts/isar-buildenv-internal b/scripts/isar-buildenv-internal
index f14d1ff..94d7eb1 100755
--- a/scripts/isar-buildenv-internal
+++ b/scripts/isar-buildenv-internal
@@ -66,5 +66,5 @@ export PATH
 BBPATH="${BUILDDIR}"
 export BBPATH
 
-BB_ENV_EXTRAWHITE="BASEDIR BUILDDIR"
+BB_ENV_EXTRAWHITE="BASEDIR BUILDDIR http_proxy https_proxy ftp_proxy no_proxy"
 export BB_ENV_EXTRAWHITE
-- 
2.14.1