Merge pull request #95 from YunoHost/add-cross-arch-support

Add cross arch support

README.md

@@ -94,7 +94,7 @@ Then test your packages :
 
 ## You can start a container on a different architecture with some hacks
 
-Install the package `binfmt-support`, then list of all available images :
+Install the package `qemu-user-static` and `binfmt-support`, then list of all available images :
 
 ```
 lxc image list images:debian/buster
@@ -131,7 +131,7 @@ lxc launch test-arm
 lxc exec inspired-lamprey -- dpkg --print-architecture
 ```
 
-We must add this feature to the package_check in the future
+If the `build_base_lxc.sh` script detects that you are trying a cross container architecture, it will try to perform this hack
 
 ## Syntax of `check_process`
 > Except spaces, the syntax of this file must be respected.

build_base_lxc.sh

@@ -3,13 +3,39 @@
 cd $(dirname $(realpath $0))
 source "./lib/common.sh"
 
+function launch_new_lxc()
+{
+    lxc info $LXC_BASE >/dev/null && lxc delete $LXC_BASE --force
+
+    if [ $(get_arch) = $ARCH ];
+    then
+        lxc launch images:debian/$DIST/$ARCH $LXC_BASE -c security.privileged=true -c security.nesting=true
+    else
+        lxc image info $LXC_BASE >/dev/null && lxc image delete $LXC_BASE
+
+        tmp_dir=$(mktemp -d)
+        pushd $tmp_dir
+
+        lxc image export images:debian/$DIST/$ARCH
+
+        tar xJf lxd.tar.xz
+        local current_arch=$(get_arch)
+        sed -i "0,/architecture: $ARCH/s//architecture: $current_arch/" metadata.yaml
+        tar cJf lxd.tar.xz metadata.yaml templates
+        lxc image import lxd.tar.xz rootfs.squashfs --alias $LXC_BASE
+        popd
+        rm -rf "$tmp_dir"
+
+        lxc launch $LXC_BASE $LXC_BASE -c security.privileged=true -c security.nesting=true
+    fi
+}
+
 function rebuild_base_lxc()
 {
     check_lxd_setup
 
     set -x
-    lxc info $LXC_BASE >/dev/null && lxc delete $LXC_BASE --force
-    lxc launch images:debian/$DIST/$ARCH $LXC_BASE -c security.privileged=true -c security.nesting=true
+    launch_new_lxc
     sleep 5
     
     IN_LXC="lxc exec $LXC_BASE --"
@@ -44,6 +70,7 @@ function rebuild_base_lxc()
     lxc stop $LXC_BASE
     lxc image delete $LXC_BASE
     lxc publish $LXC_BASE --alias $LXC_BASE
+    lxc delete $LXC_BASE
     set +x
 }
 

lib/common.sh

@@ -3,8 +3,8 @@
 ARCH="amd64"
 DIST="buster"
 
-# By default we'll install Yunohost with the default branch
-YNH_INSTALL_SCRIPT_BRANCH=""
+# Yunohost version: stable, testing or unstable
+YNH_BRANCH="stable"
 
 # Admin password
 YUNO_PWD="admin"
@@ -16,11 +16,11 @@ SUBDOMAIN="sub.$DOMAIN"
 # User de test
 TEST_USER="package_checker"
 
-LXC_BASE="ynh-appci-$DIST-$ARCH-base"
-LXC_NAME="ynh-appci-test"
-
 [[ -e "./config" ]] && source "./config"
 
+LXC_BASE="ynh-appci-$DIST-$ARCH-$YNH_BRANCH-base"
+LXC_NAME="ynh-appci-$DIST-$ARCH-$YNH_BRANCH-test"
+
 readonly lock_file="./pcheck.lock"
 
 clean_exit () {
@@ -277,3 +277,23 @@ function fetch_or_upgrade_package_linter()
     echo "$check_version" > "$version_file"
 }
 
+#=================================================
+# GET HOST ARCHITECTURE
+#=================================================
+
+function get_arch()
+{
+    local architecture
+    if uname -m | grep -q "arm64" || uname -m | grep -q "aarch64"; then
+        architecture="aarch64"
+    elif uname -m | grep -q "64"; then
+        architecture="amd64"
+    elif uname -m | grep -q "86"; then
+        architecture="i386"
+    elif uname -m | grep -q "arm"; then
+        architecture="armhf"
+    else
+        architecture="unknown"
+    fi
+    echo $architecture
+}