From mboxrd@z Thu Jan 1 00:00:00 1970 X-GM-THRID: 6522397978051739648 X-Received: by 10.80.242.130 with SMTP id f2mr575934edm.5.1518687267598; Thu, 15 Feb 2018 01:34:27 -0800 (PST) X-BeenThere: isar-users@googlegroups.com Received: by 10.80.133.197 with SMTP id q5ls1658076edh.1.gmail; Thu, 15 Feb 2018 01:34:26 -0800 (PST) X-Google-Smtp-Source: AH8x2254FZxsqVtb/DF5Xjjb8U3AhZ6ErwAgoGRzQTuDi92cDmbpY9FhI72s1PlY+HXrnP3NGJYb X-Received: by 10.80.189.195 with SMTP id z3mr576751edh.8.1518687266787; Thu, 15 Feb 2018 01:34:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1518687266; cv=none; d=google.com; s=arc-20160816; b=0QpxYFs45zFTWRkcX7KXhyG8BtZVRafR+3SkiSMX2cW2OBQ7ZuYOp3yyPJE8BhsD62 zlBCeZBE5DyhiOu0xn3qXsRA0W4WGji23G5S6GWUzOOKH9D9Epu5prNfaCrot90a/m19 psC7ZrY5xaS3rZ0xUFUDMedL8I0TrX65jqsS1ZhXiS5j76ggYGqn1j5RVBC3bKNFzSnT +CamW6dPtKk7HRnfD68SjCPd1WmCFNspr5pFhjJ3D2UTNJsIt1hafEg1N3+zymUTNrTO +DxDFcYidbS1UXxt0FHVdxXfP0RY6SUYi81PWLHNiOiVU33CprVFpUuZ/Uwpu6gJC03v lfPw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject :arc-authentication-results; bh=u7LLS6pSs1uDWk5boHaXOFsZi7wWc5fLZiPlGavYBPs=; b=JK0ZA+dQxHXfIcUraVvEkxLXkNgfwnarHHjd9QqlqRP0e+jQlqvi9dxa+oplaeqMM5 pcFdp3pwlL7v13yHJyEUPoqQ/AjThtoeRyNbV4LZ6+040Umc2EmMqX08W5fXe7iS166+ pEmiZOM77vfP4JY/x4h2CdnLYRY3Prg6W6gtbIkcL2b6a51y+GuwcuvP5ju+YF8BLtrT Y65bRG6FyzcRxwJVPHmvYah6T5/iYrAmZU4WFZYStpl4A5jV0JQA8F6A/h1nURYkZ0A2 p8OACthDLNtpurLphtIZ58JFgYc1KZ6L+TPlW0nRM0/BvJtuGLG0lGZ1L7vKkyh9ZQ7M m8TQ== ARC-Authentication-Results: i=1; gmr-mx.google.com; spf=pass (google.com: best guess record for domain of asmirnov@ilbers.de designates 85.214.62.211 as permitted sender) smtp.mailfrom=asmirnov@ilbers.de Return-Path: Received: from aqmola.ilbers.de (aqmola.ilbers.de. [85.214.62.211]) by gmr-mx.google.com with ESMTPS id m19si966473edd.4.2018.02.15.01.34.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Feb 2018 01:34:26 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of asmirnov@ilbers.de designates 85.214.62.211 as permitted sender) client-ip=85.214.62.211; Authentication-Results: gmr-mx.google.com; spf=pass (google.com: best guess record for domain of asmirnov@ilbers.de designates 85.214.62.211 as permitted sender) smtp.mailfrom=asmirnov@ilbers.de Received: from [10.0.2.15] ([188.227.110.165]) (authenticated bits=0) by aqmola.ilbers.de (8.14.4/8.14.4/Debian-4+deb7u1) with ESMTP id w1F9YAxZ013778 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Thu, 15 Feb 2018 10:34:12 +0100 Subject: Re: [PATCH 2/2] centralize multistrap configuration generation To: Jan Kiszka , isar-users@googlegroups.com, Baurzhan Ismagulov Cc: Claudius Heine References: <20180214131509.16361-1-claudius.heine.ext@siemens.com> <20180214131509.16361-3-claudius.heine.ext@siemens.com> From: Alexander Smirnov Message-ID: <1eaf1493-e834-ce50-9e75-ff5795348b58@ilbers.de> Date: Thu, 15 Feb 2018 12:34:05 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TUID: Dmd1Vd/ny3dp On 02/15/2018 10:28 AM, Jan Kiszka wrote: > On 2018-02-14 14:15, [ext] claudius.heine.ext@siemens.com wrote: >> From: Claudius Heine >> >> Previous there was redundant code between the buildchroot and >> isar-image-base recipe. >> >> This patch moves the generation of the multistrap configuration to a >> central python script that can be parametrized by both recipes. >> >> Signed-off-by: Claudius Heine >> --- >> .../recipes-core/images/files/multistrap.conf.in | 38 ---------- >> meta-isar/recipes-core/images/isar-image-base.bb | 33 ++++----- >> meta/classes/base.bbclass | 2 +- >> meta/lib/isar/__init__.py | 8 +++ >> meta/lib/isar/multistrap.py | 80 ++++++++++++++++++++++ >> meta/recipes-devtools/buildchroot/buildchroot.bb | 28 +++----- >> .../buildchroot/files/multistrap.conf.in | 37 ---------- >> 7 files changed, 111 insertions(+), 115 deletions(-) >> delete mode 100644 meta-isar/recipes-core/images/files/multistrap.conf.in >> create mode 100644 meta/lib/isar/__init__.py >> create mode 100644 meta/lib/isar/multistrap.py >> delete mode 100644 meta/recipes-devtools/buildchroot/files/multistrap.conf.in >> >> diff --git a/meta-isar/recipes-core/images/files/multistrap.conf.in b/meta-isar/recipes-core/images/files/multistrap.conf.in >> deleted file mode 100644 >> index 432b6af..0000000 >> --- a/meta-isar/recipes-core/images/files/multistrap.conf.in >> +++ /dev/null >> @@ -1,38 +0,0 @@ >> -# This software is a part of ISAR. >> -# Copyright (C) 2015-2017 ilbers GmbH >> - >> -[General] >> -noauth=true >> -unpack=true >> -ignorenativearch=true >> -bootstrap=##DISTRO_MULTICONF_BOOTSTRAP## Isar >> -aptsources=##DISTRO_MULTICONF_APTSOURCES## >> -configscript=##CONFIG_SCRIPT## >> -setupscript=##SETUP_SCRIPT## >> -hookdir=##DIR_HOOKS## >> - >> -[base] >> -source=##DISTRO_APT_SOURCE## >> -suite=##DISTRO_SUITE## >> -components=##DISTRO_COMPONENTS## >> -packages=##IMAGE_PREINSTALL## >> -omitdebsrc=true >> - >> -[updates] >> -source=##DISTRO_APT_SOURCE## >> -suite=##DISTRO_SUITE##-updates >> -components=##DISTRO_COMPONENTS## >> -omitdebsrc=true >> - >> -[security] >> -source=##DISTRO_APT_SOURCE_SEC## >> -suite=##DISTRO_SUITE##/updates >> -components=##DISTRO_COMPONENTS## >> -omitdebsrc=true >> - >> -[Isar] >> -packages=##IMAGE_INSTALL## >> -source=##DEPLOY_DIR_APT## >> -suite=##ISAR_DISTRO_SUITE## >> -components=main >> -omitdebsrc=true >> diff --git a/meta-isar/recipes-core/images/isar-image-base.bb b/meta-isar/recipes-core/images/isar-image-base.bb >> index 8ddbabb..9913977 100644 >> --- a/meta-isar/recipes-core/images/isar-image-base.bb >> +++ b/meta-isar/recipes-core/images/isar-image-base.bb >> @@ -9,8 +9,7 @@ LICENSE = "gpl-2.0" >> LIC_FILES_CHKSUM = "file://${LAYERDIR_isar}/licenses/COPYING.GPLv2;md5=751419260aa954499f7abaabaa882bbe" >> >> FILESPATH =. "${LAYERDIR_isar}/recipes-core/images/files:" >> -SRC_URI = "file://multistrap.conf.in \ >> - file://${DISTRO_CONFIG_SCRIPT} \ >> +SRC_URI = "file://${DISTRO_CONFIG_SCRIPT} \ >> file://setup.sh \ >> file://download_dev-random" >> >> @@ -28,6 +27,14 @@ WORKDIR = "${TMPDIR}/work/${DISTRO}-${DISTRO_ARCH}/${PN}" >> >> do_rootfs[dirs] = "${WORKDIR}/hooks_multistrap" >> >> +MULTISTRAP_CONFIG_SCRIPT = "${DISTRO_CONFIG_SCRIPT}" >> +MULTISTRAP_APTSOURCES = "${DISTRO_MULTICONF_APTSOURCES}" >> +MULTISTRAP_BOOTSTRAP = "${DISTRO_MULTICONF_BOOTSTRAP} isar" >> +MULTISTRAP_PREINSTALL = "${IMAGE_PREINSTALL}" >> +MULTISTRAP_ISAR_SOURCE = "copy:///${DEPLOY_DIR_APT}/${DISTRO}" >> +MULTISTRAP_ISAR_INSTALL = "${IMAGE_INSTALL}" >> +MULTISTRAP_ISAR_SUITE = "${DEBDISTRONAME}" >> + >> do_rootfs() { >> E="${@ bb.utils.export_proxies(d)}" >> >> @@ -35,25 +42,8 @@ do_rootfs() { >> chmod +x "${WORKDIR}/setup.sh" >> install -m 755 "${WORKDIR}/download_dev-random" "${WORKDIR}/hooks_multistrap/" >> >> - # Multistrap accepts only relative path in configuration files, so get it: >> - cd ${TOPDIR} >> - WORKDIR_REL=${@ os.path.relpath(d.getVar("WORKDIR", True))} >> - >> - # Adjust multistrap config >> - sed -e 's|##IMAGE_PREINSTALL##|${IMAGE_PREINSTALL}|g' \ >> - -e 's|##DISTRO_MULTICONF_BOOTSTRAP##|${DISTRO_MULTICONF_BOOTSTRAP}|g' \ >> - -e 's|##DISTRO_MULTICONF_APTSOURCES##|${DISTRO_MULTICONF_APTSOURCES}|g' \ >> - -e 's|##DISTRO_APT_SOURCE##|${DISTRO_APT_SOURCE}|g' \ >> - -e 's|##DISTRO_APT_SOURCE_SEC##|${DISTRO_APT_SOURCE_SEC}|g' \ >> - -e 's|##DISTRO_SUITE##|${DISTRO_SUITE}|g' \ >> - -e 's|##DISTRO_COMPONENTS##|${DISTRO_COMPONENTS}|g' \ >> - -e 's|##CONFIG_SCRIPT##|./'"$WORKDIR_REL"'/${DISTRO_CONFIG_SCRIPT}|g' \ >> - -e 's|##SETUP_SCRIPT##|./'"$WORKDIR_REL"'/setup.sh|g' \ >> - -e 's|##DIR_HOOKS##|./'"$WORKDIR_REL"'/hooks_multistrap|g' \ >> - -e 's|##IMAGE_INSTALL##|${IMAGE_INSTALL}|g' \ >> - -e 's|##DEPLOY_DIR_APT##|copy:///${DEPLOY_DIR_APT}/${DISTRO}|g' \ >> - -e 's|##ISAR_DISTRO_SUITE##|${DEBDISTRONAME}|g' \ >> - "${WORKDIR}/multistrap.conf.in" > "${WORKDIR}/multistrap.conf" >> + echo "${@ isar.multistrap.generate_multistrap_config(d) }" > \ >> + "${WORKDIR}/multistrap.conf" >> >> # Do not use bitbake flag [dirs] here because this folder should have >> # specific ownership. >> @@ -62,6 +52,7 @@ do_rootfs() { >> >> # Create root filesystem. We must use sudo -E here to preserve the environment >> # because of proxy settings >> + cd "${TOPDIR}" >> sudo -E multistrap -a ${DISTRO_ARCH} -d "${IMAGE_ROOTFS}" -f "${WORKDIR}/multistrap.conf" >> >> # Configure root filesystem >> diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass >> index 3334789..2a45a1e 100644 >> --- a/meta/classes/base.bbclass >> +++ b/meta/classes/base.bbclass >> @@ -38,7 +38,7 @@ bbfatal() { >> } >> >> # Derived from openembedded-core/meta/classes/base.bbclass >> -ISAR_IMPORTS += "os sys time" >> +ISAR_IMPORTS += "os sys time isar" >> >> def isar_imports(d): >> import sys >> diff --git a/meta/lib/isar/__init__.py b/meta/lib/isar/__init__.py >> new file mode 100644 >> index 0000000..e6aeeaa >> --- /dev/null >> +++ b/meta/lib/isar/__init__.py >> @@ -0,0 +1,8 @@ >> +# Custom kernel recipe include >> +# >> +# This software is a part of ISAR. >> +# Copyright (c) Siemens AG, 2018 >> +# >> +# SPDX-License-Identifier: MIT >> + >> +from . import multistrap >> diff --git a/meta/lib/isar/multistrap.py b/meta/lib/isar/multistrap.py >> new file mode 100644 >> index 0000000..7022f91 >> --- /dev/null >> +++ b/meta/lib/isar/multistrap.py >> @@ -0,0 +1,80 @@ >> +# Custom kernel recipe include >> +# >> +# This software is a part of ISAR. >> +# Copyright (c) Siemens AG, 2018 >> +# >> +# SPDX-License-Identifier: MIT >> + >> +def generate_multistrap_config(d): >> + import configparser as cp >> + import io >> + >> + workdir = d.getVar("WORKDIR", True) or "" >> + topdir = d.getVar("TOPDIR", True) or "" >> + workdir_rel = os.path.relpath(workdir, start=topdir) >> + >> + msconf = cp.RawConfigParser() >> + >> + # Set general multistrap configuration: >> + configscript = d.getVar("MULTISTRAP_CONFIG_SCRIPT", True) or "" >> + setupscript = d.getVar("MULTISTRAP_SETUP_SCRIPT", True) or "setup.sh" >> + hookdir = d.getVar("MULTISTRAP_HOOK_DIR", True) or "hooks_multistrap" >> + aptsources = (d.getVar("MULTISTRAP_APTSOURCES", True) or "").split() >> + bootstrap = (d.getVar("MULTISTRAP_BOOTSTRAP", True) or "").split() >> + >> + msconf.add_section("General") >> + msconf.set("General", "noauth", "true") >> + msconf.set("General", "unpack", "true") >> + msconf.set("General", "ignorenativearch", "true") >> + msconf.set("General", "configscript", "./" + >> + os.path.join(workdir_rel, configscript)) >> + msconf.set("General", "setupscript", "./" + >> + os.path.join(workdir_rel, setupscript)) >> + msconf.set("General", "hookdir", "./" + >> + os.path.join(workdir_rel, hookdir)) >> + msconf.set("General", "aptsources", " ".join(aptsources)) >> + msconf.set("General", "bootstrap", " ".join(bootstrap)) >> + >> + # Setup upstream repositories in multistrap configuration: >> + apt_source = d.getVar("DISTRO_APT_SOURCE", True) or "" >> + apt_source_sec = d.getVar("DISTRO_APT_SOURCE_SEC", True) or "" >> + apt_suite = d.getVar("DISTRO_SUITE", True) or "" >> + apt_components = (d.getVar("DISTRO_COMPONENTS", True) or "").split() >> + deb_packages = (d.getVar("MULTISTRAP_PREINSTALL", True) or "").split() >> + isar_source = d.getVar("MULTISTRAP_ISAR_SOURCE", True) or "" >> + isar_packages = (d.getVar("MULTISTRAP_ISAR_INSTALL", True) or "").split() >> + isar_suite = d.getVar("MULTISTRAP_ISAR_SUITE", True) or "isar" >> + >> + msconf.add_section("base") >> + msconf.set("base", "source", apt_source) >> + msconf.set("base", "suite", apt_suite) >> + msconf.set("base", "components", " ".join(apt_components)) >> + msconf.set("base", "omitdebsrc", "true") >> + msconf.set("base", "packages", " ".join(deb_packages)) >> + >> + msconf.add_section("updates") >> + msconf.set("updates", "source", apt_source) >> + msconf.set("updates", "suite", apt_suite + "-updates") >> + msconf.set("updates", "components", " ".join(apt_components)) >> + msconf.set("updates", "omitdebsrc", "true") >> + >> + msconf.add_section("security") >> + msconf.set("security", "source", apt_source_sec) >> + msconf.set("security", "suite", apt_suite + "/updates") >> + msconf.set("security", "components", " ".join(apt_components)) >> + msconf.set("security", "omitdebsrc", "true") >> + >> + msconf.add_section("isar") >> + msconf.set("isar", "source", isar_source) >> + msconf.set("isar", "suite", isar_suite) >> + msconf.set("isar", "components", "main") >> + msconf.set("isar", "omitdebsrc", "true") >> + if isar_packages : >> + msconf.set("isar", "packages", >> + " ".join(isar_packages)) >> + >> + ret = "" >> + with io.StringIO() as out: >> + msconf.write(out) >> + ret = out.getvalue() >> + return ret >> diff --git a/meta/recipes-devtools/buildchroot/buildchroot.bb b/meta/recipes-devtools/buildchroot/buildchroot.bb >> index 570c0ad..59b4e7e 100644 >> --- a/meta/recipes-devtools/buildchroot/buildchroot.bb >> +++ b/meta/recipes-devtools/buildchroot/buildchroot.bb >> @@ -9,8 +9,7 @@ LICENSE = "gpl-2.0" >> LIC_FILES_CHKSUM = "file://${LAYERDIR_isar}/licenses/COPYING.GPLv2;md5=751419260aa954499f7abaabaa882bbe" >> >> FILESPATH =. "${LAYERDIR_core}/recipes-devtools/buildchroot/files:" >> -SRC_URI = "file://multistrap.conf.in \ >> - file://configscript.sh \ >> +SRC_URI = "file://configscript.sh \ >> file://setup.sh \ >> file://build.sh" >> PV = "1.0" >> @@ -37,32 +36,25 @@ do_build[dirs] = "${BUILDCHROOT_DIR}/isar-apt \ >> ${BUILDCHROOT_DIR}/sys" >> do_build[depends] = "isar-apt:do_cache_config" >> >> +MULTISTRAP_CONFIG_SCRIPT = "configscript.sh" >> +MULTISTRAP_APTSOURCES = "isar ${DISTRO_MULTICONF_APTSOURCES}" >> +MULTISTRAP_BOOTSTRAP = "${DISTRO_MULTICONF_BOOTSTRAP}" >> +MULTISTRAP_PREINSTALL = "${BUILDCHROOT_PREINSTALL}" >> +MULTISTRAP_ISAR_SOURCE = "file:///isar-apt" >> + >> do_build() { >> E="${@ bb.utils.export_proxies(d)}" >> >> chmod +x "${WORKDIR}/setup.sh" >> chmod +x "${WORKDIR}/configscript.sh" >> >> - # Multistrap accepts only relative path in configuration files, so get it: >> - cd ${TOPDIR} >> - WORKDIR_REL=${@ os.path.relpath(d.getVar("WORKDIR", True))} >> - >> - # Adjust multistrap config >> - sed -e 's|##BUILDCHROOT_PREINSTALL##|${BUILDCHROOT_PREINSTALL}|g' \ >> - -e 's|##DISTRO_MULTICONF_BOOTSTRAP##|${DISTRO_MULTICONF_BOOTSTRAP}|g' \ >> - -e 's|##DISTRO_MULTICONF_APTSOURCES##|${DISTRO_MULTICONF_APTSOURCES}|g' \ >> - -e 's|##DISTRO_APT_SOURCE##|${DISTRO_APT_SOURCE}|g' \ >> - -e 's|##DISTRO_APT_SOURCE_SEC##|${DISTRO_APT_SOURCE_SEC}|g' \ >> - -e 's|##DISTRO_SUITE##|${DISTRO_SUITE}|g' \ >> - -e 's|##DISTRO_COMPONENTS##|${DISTRO_COMPONENTS}|g' \ >> - -e 's|##CONFIG_SCRIPT##|./'"$WORKDIR_REL"'/configscript.sh|g' \ >> - -e 's|##SETUP_SCRIPT##|./'"$WORKDIR_REL"'/setup.sh|g' \ >> - -e 's|##DIR_HOOKS##|./'"$WORKDIR_REL"'/hooks_multistrap|g' \ >> - "${WORKDIR}/multistrap.conf.in" > "${WORKDIR}/multistrap.conf" >> + echo "${@ isar.multistrap.generate_multistrap_config(d) }" > \ >> + "${WORKDIR}/multistrap.conf" >> >> do_setup_mounts >> >> # Create root filesystem >> + cd "${TOPDIR}" >> sudo -E multistrap -a ${DISTRO_ARCH} -d "${BUILDCHROOT_DIR}" -f "${WORKDIR}/multistrap.conf" >> >> # Install package builder script >> diff --git a/meta/recipes-devtools/buildchroot/files/multistrap.conf.in b/meta/recipes-devtools/buildchroot/files/multistrap.conf.in >> deleted file mode 100644 >> index 480a4b8..0000000 >> --- a/meta/recipes-devtools/buildchroot/files/multistrap.conf.in >> +++ /dev/null >> @@ -1,37 +0,0 @@ >> -# This software is a part of ISAR. >> -# Copyright (C) 2015-2017 ilbers GmbH >> - >> -[General] >> -noauth=true >> -unpack=true >> -ignorenativearch=true >> -bootstrap=##DISTRO_MULTICONF_BOOTSTRAP## >> -aptsources=isar-apt ##DISTRO_MULTICONF_APTSOURCES## >> -configscript=##CONFIG_SCRIPT## >> -setupscript=##SETUP_SCRIPT## >> -hookdir=##DIR_HOOKS## >> - >> -[base] >> -source=##DISTRO_APT_SOURCE## >> -suite=##DISTRO_SUITE## >> -components=##DISTRO_COMPONENTS## >> -packages=##BUILDCHROOT_PREINSTALL## >> -omitdebsrc=true >> - >> -[updates] >> -source=##DISTRO_APT_SOURCE## >> -suite=##DISTRO_SUITE##-updates >> -components=##DISTRO_COMPONENTS## >> -omitdebsrc=true >> - >> -[security] >> -source=##DISTRO_APT_SOURCE_SEC## >> -suite=##DISTRO_SUITE##/updates >> -components=##DISTRO_COMPONENTS## >> -omitdebsrc=true >> - >> -[isar-apt] >> -source=file:///isar-apt >> -suite=isar >> -components=main >> -omitdebsrc=true >> > > This requires rebasing. I quickly tried, but the result broke the > package build (didn't analyze any details). > > > While this moves us in the right direction, it still leaves some > duplications behind (setup.sh) - and the big question if we should > invest any further in this horrible multistrap mess. > > I've just enabled arm64, and it took a while to figure out that I was > missing some lines in setup.sh. In contrast, qemu-debootstrap just > worked (I used it to debug the multistrap output). > > So, before we move on here: What all does multistrap currently give us, > compared to standard debootstrap? I only see "multiple repositories" so > far. But as Claudius is going to massage that part heavily anyway, I > really wonder if it's worth building on the multistrap indirection any > further. > > How about something like this? > > - [qemu-]debootstrap --variant=minbase ... > - inject all additional apt sources, including user-provided ones > - set pinnings and priority, including user-provided ones > - apt-get dist-upgrade > I'd say that multistrap is a tool which maps user-friendly config file to specific apt repositories configuration. If you look in the do_build() log for buildchroot, you could see what it exactly does: 1. Creating list of sources in rootfs/etc 2. Get packages.gz for all the sources: apt-get -o Apt::Architecture=armhf -o Dir::Etc::TrustedParts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/trusted.gpg.d -o Dir::Etc::Trusted=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/trusted.gpg.d/trusted.gpg -o Apt::Get::AllowUnauthenticated=true -o Apt::Get::Download-Only=true -o Apt::Install-Recommends=false -o Dir=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/ -o Dir::Etc=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/ -o Dir::Etc::Parts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/apt.conf.d/ -o Dir::Etc::PreferencesParts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/preferences.d/ -o APT::Default-Release=* -o Dir::State=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/lib/apt/ -o Dir::State::Status=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/lib/dpkg/status -o Dir::Cache=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/cache/apt/ update 3. Install packages: apt-get -y -o Apt::Architecture=armhf -o Dir::Etc::TrustedParts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/trusted.gpg.d -o Dir::Etc::Trusted=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/trusted.gpg.d/trusted.gpg -o Apt::Get::AllowUnauthenticated=true -o Apt::Get::Download-Only=true -o Apt::Install-Recommends=false -o Dir=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/ -o Dir::Etc=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/ -o Dir::Etc::Parts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/apt.conf.d/ -o Dir::Etc::PreferencesParts=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/etc/apt/preferences.d/ -o APT::Default-Release=* -o Dir::State=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/lib/apt/ -o Dir::State::Status=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/lib/dpkg/status -o Dir::Cache=/home/builder/isar/build/tmp/work/raspbian-jessie-armhf/buildchroot/rootfs/var/cache/apt/ install ${LIST_OF_PACKAGES} > That would kick out all the multistrap complications. For me the plan above intersects with these multistrap steps, you have to re-implement them from the scratch. In this case I'd vote for the community-proved solution. Alex