Configure the image type and image creation options using profiles (#54)

AUTHORS.rst

@@ -15,6 +15,7 @@ Archiso Authors
 * Dieter Plaetinck <dieter@plaetinck.be>
 * Eli Schwartz <eschwartz@archlinux.org>
 * Florian Pritz <bluewind@xinu.at>
+* Francois Dupoux <fdupoux@users.sourceforge.net>
 * Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
 * Gerhard Brauer <gerbra@archlinux.de>
 * James Sitegen <jamesm.sitegen@gmail.com>

README.profile.rst

@@ -44,6 +44,11 @@ The image file is constructed from some of the variables in **profiledef.sh**: `
   file (e.g. `packages.x86_64`)
 * `pacman_conf`: The `pacman.conf` to use to install packages to the work directory when creating the image (defaults to
   the host's `/etc/pacman.conf`)
+* `airootfs_image_type`: The image type to create. The following options are understood (defaults to `squashfs`):
+  - `squashfs`: Create a squashfs image directly from the airootfs work directory
+  - `ext4+squashfs`: Create an ext4 partition, copy the airootfs work directory to it and create a squashfs image from it
+* `airootfs_image_tool_options`: An array of options to pass to the tool to create the airootfs image. Currently only
+  `mksquashfs` is supported - see `mksquashfs --help` for all possible options (defaults to `('-comp' 'xz')`).
 
 packages.arch
 =============

archiso/mkarchiso

@@ -17,8 +17,6 @@ quiet="y"
 work_dir="work"
 out_dir="out"
 img_name="${app_name}.iso"
-sfs_mode="sfs"
-sfs_comp="xz"
 gpg_key=""
 override_gpg_key=""
 
@@ -38,6 +36,8 @@ arch="$(uname -m)"
 pacman_conf="/etc/pacman.conf"
 override_pacman_conf=""
 bootmodes=()
+airootfs_image_type="squashfs"
+airootfs_image_tool_options=('-comp' 'xz')
 
 
 # Show an INFO message
@@ -108,17 +108,11 @@ usage: ${app_name} [options] <profile_dir>
                       Default: '${iso_label}'
      -P <publisher>   Set the ISO publisher
                       Default: '${iso_publisher}'
-     -c <comp_type>   Set SquashFS compression type (gzip, lzma, lzo, xz, zstd)
-                      Default: '${sfs_comp}'
      -g <gpg_key>     Set the GPG key to be used for signing the sqashfs image
      -h               This message
      -o <out_dir>     Set the output directory
                       Default: '${out_dir}'
      -p PACKAGE(S)    Package(s) to install, can be used multiple times
-     -s <sfs_mode>    Set SquashFS image mode (img or sfs)
-                      img: prepare airootfs.sfs for dm-snapshot usage
-                      sfs: prepare airootfs.sfs for overlayfs usage
-                      Default: '${sfs_mode}'
      -v               Enable verbose output
      -w <work_dir>    Set the working directory
                       Default: '${work_dir}'
@@ -201,6 +195,23 @@ _cleanup() {
     _msg_info "Done!"
 }
 
+_mkairootfs_create_image() {
+    if (( $# < 1 )); then
+        _msg_error "Function '${FUNCNAME[0]}' requires at least one argument" 1
+    fi
+
+    image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
+    if [[ "${airootfs_image_type}" =~ .*squashfs ]] ; then
+        if [[ "${quiet}" == "y" ]]; then
+            mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}" -no-progress > /dev/null
+        else
+            mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}"
+        fi
+    else
+        _msg_error "Unsupported image type: '${airootfs_image_type}'" 1
+    fi
+}
+
 # Makes a ext4 filesystem inside a SquashFS from a source directory.
 _mkairootfs_img() {
     if [[ ! -e "${airootfs_dir}" ]]; then
@@ -223,13 +234,7 @@ _mkairootfs_img() {
     _umount_airootfs
     install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
     _msg_info "Creating SquashFS image, this may take some time..."
-    if [[ "${quiet}" = "y" ]]; then
-        mksquashfs "${airootfs_dir}.img" "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" -noappend \
-            -comp "${sfs_comp}" -no-progress > /dev/null
-    else
-        mksquashfs "${airootfs_dir}.img" "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" -noappend \
-            -comp "${sfs_comp}"
-    fi
+    _mkairootfs_create_image "${airootfs_dir}.img"
     _msg_info "Done!"
     rm -- "${airootfs_dir}.img"
 }
@@ -242,13 +247,7 @@ _mkairootfs_sfs() {
 
     install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
     _msg_info "Creating SquashFS image, this may take some time..."
-    if [[ "${quiet}" = "y" ]]; then
-        mksquashfs "${airootfs_dir}" "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" -noappend \
-            -comp "${sfs_comp}" -no-progress > /dev/null
-    else
-        mksquashfs "${airootfs_dir}" "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" -noappend \
-            -comp "${sfs_comp}"
-    fi
+    _mkairootfs_create_image "${airootfs_dir}"
     _msg_info "Done!"
 }
 
@@ -573,10 +572,12 @@ _make_boot_uefi-x64.systemd-boot.eltorito() {
 
 # Build airootfs filesystem image
 _make_prepare() {
-    if [[ "${sfs_mode}" == "sfs" ]]; then
+    if [[ "${airootfs_image_type}" == "squashfs" ]]; then # prepare airootfs.sfs for overlayfs usage (default)
         _run_once _mkairootfs_sfs
-    else
+    elif [[ "${airootfs_image_type}" == "ext4+squashfs" ]]; then # prepare airootfs.sfs for dm-snapshot usage
         _run_once _mkairootfs_img
+    else
+        _msg_error "Unsupported image type: '${airootfs_image_type}'" 1
     fi
     _mkchecksum
     if [[ "${gpg_key}" ]]; then
@@ -806,7 +807,7 @@ _build_profile() {
     _run_once _make_iso
 }
 
-while getopts 'p:r:C:L:P:A:D:w:o:s:c:g:vh?' arg; do
+while getopts 'p:r:C:L:P:A:D:w:o:g:vh?' arg; do
     case "${arg}" in
         p)
             read -r -a opt_pkg_list <<< "${OPTARG}"
@@ -820,8 +821,6 @@ while getopts 'p:r:C:L:P:A:D:w:o:s:c:g:vh?' arg; do
         D) override_install_dir="${OPTARG}" ;;
         w) work_dir="$(realpath -- "${OPTARG}")" ;;
         o) out_dir="$(realpath -- "${OPTARG}")" ;;
-        s) sfs_mode="${OPTARG}" ;;
-        c) sfs_comp="${OPTARG}" ;;
         g) override_gpg_key="${OPTARG}" ;;
         v) quiet="n" ;;
         h|?) _usage 0 ;;