add github action to build the rootfs

.github/workflows/build-rootfs.yaml

@@ -0,0 +1,26 @@
+name: build-rootfs
+run-name: Build the base Debian rootfs
+on: [push]
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: download repo
+        uses: actions/checkout@v4
+
+      - name: install deps
+        run: | 
+          sudo apt-get install debootstrap coreutils -y
+
+      - name: run build
+        id: run_build
+        run: sudo DEBUG=1 ./build_rootfs.sh data/rootfs bookworm hostname=shimboot root_passwd=root username=user user_passwd=user
+      
+      - name: archive rootfs
+        run: tar -vcf data/rootfs.tar.gz -C data/rootfs ./
+
+      - name: upload rootfs
+        uses: actions/upload-artifact@v4
+        with:
+          name: rootfs_tar
+          path: data/rootfs.tar.gz

build.sh

@@ -14,15 +14,6 @@ print_help() {
   echo "Usage: ./build.sh output_path shim_path rootfs_dir"
 }
 
-check_deps() {
-  local needed_commands="cpio binwalk pcregrep realpath cgpt mkfs.ext4 mkfs.ext2 fdisk rsync"
-  for command in $needed_commands; do
-    if ! command -v $command &> /dev/null; then
-      echo $command
-    fi
-  done
-}
-
 if [ "$EUID" -ne 0 ]; then
   echo "this needs to be run as root."
   exit 1
@@ -33,13 +24,8 @@ if [ -z "$3" ]; then
   exit 1
 fi
 
-missing_commands=$(check_deps)
-if [ "${missing_commands}" ]; then
-  echo "You are missing dependencies needed for this script."
-  echo "Commands needed:"
-  echo "${missing_commands}"
-  exit 1
-fi
+. ./common.sh
+assert_deps "cpio binwalk pcregrep realpath cgpt mkfs.ext4 mkfs.ext2 fdisk rsync"
 
 output_path=$(realpath "${1}")
 shim_path=$(realpath "${2}")

build_complete.sh

@@ -17,9 +17,21 @@ if [ -z "$1" ]; then
   echo "Usage: ./build_complete.sh board_name"
   echo "Valid named arguments (specify with 'key=value'):"
   echo "  compress_img - Compress the final disk image into a zip file. Set this to any value to enable this option."
+  echo "  rootfs_dir   - Use a different rootfs for the build. The directory you select will be copied before any patches are applied."
   exit 1
 fi
 
+parse_args "$@"
+needed_deps="wget python3 unzip zip git debootstrap cpio binwalk pcregrep cgpt mkfs.ext4 mkfs.ext2 fdisk rsync"
+if ! check_deps "$needed_deps"; then
+  #install deps automatically on debian and ubuntu
+  if [ -f "/etc/debian_version" ]; then
+    echo "attempting to install build deps"
+    apt-get install wget python3-all unzip zip debootstrap cpio binwalk pcregrep cgpt rsync -y
+  fi
+  assert_deps "$needed_deps"
+fi
+
 cleanup_path=""
 sigint_handler() {
   if [ $cleanup_path ]; then
@@ -77,6 +89,7 @@ download_and_unzip $reco_url $reco_zip $reco_bin
 echo "downloading shim image"
 download_and_unzip $shim_url $shim_zip $shim_bin
 
+if [ ! "${args['rootfs_dir']}" ]; then
   rootfs_dir="$(realpath data/rootfs_$board)"
   rm -rf $rootfs_dir
   mkdir -p $rootfs_dir
@@ -87,12 +100,16 @@ echo "building debian rootfs"
     root_passwd=root \
     username=user \
     user_passwd=user  
+else
+  rootfs_dir="$(realpath "${args['rootfs_dir']}")"
+fi
 
 echo "patching debian rootfs"
 ./patch_rootfs.sh $shim_bin $reco_bin $rootfs_dir
 
 echo "building final disk image"
 final_image="$base_dir/data/shimboot_$board.bin"
+rm -rf $final_image
 ./build.sh $final_image $shim_bin data/rootfs
 echo "build complete! the final disk image is located at $final_image"
 

build_rootfs.sh

@@ -29,11 +29,13 @@ fi
 assert_deps "realpath debootstrap"
 parse_args "$@"
 
-rootfs_dir=$(realpath "${1}")
+rootfs_dir=$(realpath -m "${1}")
 release_name="${2}"
 packages="${args['custom_packages']-'task-xfce-desktop'}"
 chroot_mounts="proc sys dev run"
 
+mkdir -p $rootfs_dir
+
 unmount_all() {
   for mountpoint in $chroot_mounts; do
     umount -l "$rootfs_dir/$mountpoint"