From e36e63b8f1b3d7324e7e3706fd11fdff4ec24358 Mon Sep 17 00:00:00 2001
From: Thomas Bächler <thomas@archlinux.org>
Date: Sat, 13 Feb 2016 10:08:38 +0100
Subject: Optionally sign the squashfs files with gpg and add the gpg key to
 the initramfs

A new option -g <keyid> is added to build.sh set the key id. If it is set, the squashfs files will be signed
by gpg and the gpg key will be added to archiso.img. In order to use this option, a gpg agent must be running.
Since build.sh is executed as root, it may be necessary to set the GNUPGHOME environment variable, for
example

$ su -c "GNUPGHOME=/home/youruser/.gnupg /path/to/build.sh -g yourkeyid"
---
 configs/releng/build.sh | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/configs/releng/build.sh b/configs/releng/build.sh
index b0306cc..ad2f994 100755
--- a/configs/releng/build.sh
+++ b/configs/releng/build.sh
@@ -79,7 +79,15 @@ make_setup_mkinitcpio() {
     cp /usr/lib/initcpio/install/archiso_kms ${work_dir}/${arch}/airootfs/etc/initcpio/install
     cp /usr/lib/initcpio/archiso_shutdown ${work_dir}/${arch}/airootfs/etc/initcpio
     cp ${script_path}/mkinitcpio.conf ${work_dir}/${arch}/airootfs/etc/mkinitcpio-archiso.conf
-    setarch ${arch} mkarchiso ${verbose} -w "${work_dir}/${arch}" -C "${work_dir}/pacman.conf" -D "${install_dir}" -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
+    gnupg_fd=
+    if [[ ${gpg_key} ]]; then
+      gpg --export ${gpg_key} >${work_dir}/gpgkey
+      exec 17<>${work_dir}/gpgkey
+    fi
+    ARCHISO_GNUPG_FD=${gpg_key:+17} setarch ${arch} mkarchiso ${verbose} -w "${work_dir}/${arch}" -C "${work_dir}/pacman.conf" -D "${install_dir}" -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
+    if [[ ${gpg_key} ]]; then
+      exec 17<&-
+    fi
 }
 
 # Customize installation (airootfs)
@@ -197,7 +205,7 @@ make_efiboot() {
 make_prepare() {
     cp -a -l -f ${work_dir}/${arch}/airootfs ${work_dir}
     setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" pkglist
-    setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" prepare
+    setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" ${gpg_key:+-g ${gpg_key}} prepare
     rm -rf ${work_dir}/airootfs
     # rm -rf ${work_dir}/${arch}/airootfs (if low space, this helps)
 }
@@ -217,7 +225,7 @@ if [[ ${arch} != x86_64 ]]; then
     _usage 1
 fi
 
-while getopts 'N:V:L:D:w:o:vh' arg; do
+while getopts 'N:V:L:D:w:o:g:vh' arg; do
     case "${arg}" in
         N) iso_name="${OPTARG}" ;;
         V) iso_version="${OPTARG}" ;;
@@ -225,6 +233,7 @@ while getopts 'N:V:L:D:w:o:vh' arg; do
         D) install_dir="${OPTARG}" ;;
         w) work_dir="${OPTARG}" ;;
         o) out_dir="${OPTARG}" ;;
+        g) gpg_key="${OPTARG}" ;;
         v) verbose="-v" ;;
         h) _usage 0 ;;
         *)
-- 
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