tools: Allow building as root for CI

.gitea/workflows/build.yaml

@@ -10,8 +10,8 @@ jobs:
         uses: actions/checkout@v3
       - name: Download dependencies
         run: |
-          sudo apt update
-          sudo apt install -y cmake ninja-build nasm genext2fs qemu-system build-essential wget git fakeroot
+          apt update
+          apt install -y cmake ninja-build nasm genext2fs qemu-system build-essential wget git fakeroot
       - name: Set up the toolchain
         run: |
           wget https://pub.cloudapio.eu/luna/toolchains/ci-toolchain-arm64.tar.gz --quiet

tools/install.sh

@@ -11,12 +11,6 @@ then
     exit 1
 fi
 
-if [ "$USER" == "root" ]
-then
-    echo "This script must be run under fakeroot instead of as root."
-    exit 1
-fi
-
 chown -R root:root base
 
 cmake --install $LUNA_BUILD_DIR
@@ -31,5 +25,6 @@ mkdir -p base/tmp
 
 rm -f base/bin
 ln -s usr/bin base/bin
+chown -h root:root base/bin
 
 cp $LUNA_ROOT/LICENSE base/etc/skel/LICENSE

tools/make-iso.sh

@@ -5,12 +5,22 @@ source $(dirname $0)/env.sh
 
 cd $LUNA_ROOT
 
-fakeroot -u -s $LUNA_ROOT/.fakeroot -- tools/install.sh
+if [ "$(id -u)" -ne "0" ]
+then
+    export FAKEROOT_SAVE="fakeroot -u -s $LUNA_ROOT/.fakeroot -- "
+    export FAKEROOT_RESTORE="fakeroot -u -i $LUNA_ROOT/.fakeroot -- "
+else
+    echo "Caution: you are running make-iso.sh as root. This should only be done inside a container, for example in CI."
+    export FAKEROOT_SAVE=""
+    export FAKEROOT_RESTORE=""
+fi
+
+${FAKEROOT_SAVE}tools/install.sh
 
 disk_space=$(du -s base | awk '{ print $1 }')
 min_blocks=$(($disk_space / 4)) # This is just the blocks needed for all the files in the file system: this excludes space for the inode table, block group descriptors, etc.
 blocks=$(($min_blocks + 1024)) # This is the actual number of blocks we're using.
 
-fakeroot -u -i $LUNA_ROOT/.fakeroot -- genext2fs -d base -B 4096 -b $blocks -L luna-rootfs -N 1024 build/ext2fs.bin
+${FAKEROOT_RESTORE}genext2fs -d base -B 4096 -b $blocks -L luna-rootfs -N 1024 build/ext2fs.bin
 
 mkbootimg luna.json Luna.iso