build: Add --root-user-action flag (#967)

Dockerfile

@@ -44,7 +44,7 @@ RUN set -eu && \
         netcat-openbsd \
         qemu-system-x86 && \
     apt-get clean && \
-    pip3 install --no-cache-dir --break-system-packages dissect.cstruct && \
+    pip3 install --no-cache-dir --break-system-packages --root-user-action dissect.cstruct && \
     mkdir -p /etc/qemu && \
     echo "allow br0" > /etc/qemu/bridge.conf && \
     unlink /etc/nginx/sites-enabled/default && \

src/install.sh

@@ -270,12 +270,9 @@ mv "$HDA.tgz" "$HDA.txz"
 [ -d "$PKG" ] && mv "$PKG/" "$MOUNT/.SynoUpgradePackages/"
 rm -f "$MOUNT/.SynoUpgradePackages/ActiveInsight-"*
 
-[ -s "$HDP.txz" ] && tar xpfJ "$HDP.txz" --absolute-names -C "$MOUNT/"
-
 if [ -s "$IDB.txz" ]; then
-  INDEX_DB="$MOUNT/usr/syno/synoman/indexdb/"
+  INDEX_DB="$MOUNT/usr/syno/synoman/indexdb"
   mkdir -p "$INDEX_DB"
-  tar xpfJ "$IDB.txz" --absolute-names -C "$INDEX_DB"
 fi
 
 LABEL="1.44.1-42218"
@@ -284,6 +281,8 @@ NUMBLOCKS="2097152" # (16777216 * 512) / 4096
 MSG="Installing system partition..."
 
 fakeroot -- bash -c "set -Eeu;\
+  [ -s $HDP.txz ] && tar xpfJ $HDP.txz --absolute-names -C $MOUNT/;\
+  [ -s $IDB.txz ] && tar xpfJ $IDB.txz --absolute-names -C $INDEX_DB/;\
   tar xpfJ $HDA.txz --absolute-names --skip-old-files -C $MOUNT/;\
   printf '%b%s%b' '\E[1;34m❯ \E[1;36m' 'Install: $MSG' '\E[0m\n';\
   mke2fs -q -t ext4 -b 4096 -d $MOUNT/ -L $LABEL -F -E offset=$OFFSET $SYSTEM $NUMBLOCKS"

src/network.sh

@@ -338,17 +338,17 @@ closeNetwork() {
 
 checkOS() {
 
-  local name
+  local kernel
   local os=""
   local if="macvlan"
-  name=$(uname -a)
+  kernel=$(uname -a)
 
-  [[ "${name,,}" == *"darwin"* ]] && os="Docker Desktop for macOS"
+  [[ "${kernel,,}" == *"darwin"* ]] && os="Docker Desktop for macOS"
-  [[ "${name,,}" == *"microsoft"* ]] && os="Docker Desktop for Windows"
+  [[ "${kernel,,}" == *"microsoft"* ]] && os="Docker Desktop for Windows"
 
   if [[ "$DHCP" == [Yy1]* ]]; then
     if="macvtap"
-    [[ "${name,,}" == *"synology"* ]] && os="Synology Container Manager"
+    [[ "${kernel,,}" == *"synology"* ]] && os="Synology Container Manager"
   fi
 
   if [ -n "$os" ]; then

src/proc.sh

@@ -37,14 +37,14 @@ if [[ "$KVM" != [Nn]* ]]; then
   KVM_ERR=""
 
   if [ ! -e /dev/kvm ]; then
-    KVM_ERR="(device file missing)"
+    KVM_ERR="(/dev/kvm is missing)"
   else
     if ! sh -c 'echo -n > /dev/kvm' &> /dev/null; then
-      KVM_ERR="(no write access)"
+      KVM_ERR="(/dev/kvm is unwriteable)"
     else
       flags=$(sed -ne '/^flags/s/^.*: //p' /proc/cpuinfo)
       if ! grep -qw "vmx\|svm" <<< "$flags"; then
-        KVM_ERR="(vmx/svm disabled)"
+        KVM_ERR="(not enabled in BIOS)"
       fi
     fi
   fi
@@ -53,9 +53,17 @@ if [[ "$KVM" != [Nn]* ]]; then
     KVM="N"
     if [[ "$OSTYPE" =~ ^darwin ]]; then
       warn "you are using macOS which has no KVM support, this will cause a major loss of performance."
-    else
+    else      
-      error "KVM acceleration not available $KVM_ERR, this will cause a major loss of performance."
+      kernel=$(uname -a)
-      error "See the FAQ on how to diagnose the cause, or continue without KVM by setting KVM=N (not recommended)."
+      case "${kernel,,}" in
+        *"microsoft"* )
+          error "Please bind '/dev/kvm' as a volume in the optional container settings when using Docker Desktop." ;;
+        *"synology"* )
+          error "Please make sure that Synology VMM (Virtual Machine Manager) is installed and that '/dev/kvm' is binded to this container." ;;
+        *)
+          error "KVM acceleration is not available $KVM_ERR, this will cause a major loss of performance."
+          error "See the FAQ for possible causes, or continue without it by adding KVM: \"N\" (not recommended)." ;;
+      esac
       [[ "$DEBUG" != [Yy1]* ]] && exit 88
     fi
   fi