workaround: postinst has been hardcoded due to config.txt edition issue

.drone.yml

@@ -18,6 +18,7 @@ pipeline:
     commands:
       - curl https://apt.matrix.one/doc/apt-key.gpg | apt-key add -
       - echo "deb https://apt.matrix.one/raspbian ${CODENAME} main" > /etc/apt/sources.list.d/matrixlabs.list
+      - apt install -y dkms
       - ${UPDATE_CMD}
       - debuild -us -uc -b
       - mv ../*.deb .
@@ -31,16 +32,16 @@ pipeline:
     secrets: [aws_access_key_id, aws_secret_access_key, gpg_key, gpg_pass]
     commands:
       # Prepare GPG
-      - echo "$${GPG_KEY}" > /tmp/tmpkey && gpg --import /tmp/tmpkey && rm /tmp/tmpkey
+      - echo "$${GPG_KEY}" > /tmp/tmpkey && gpg --import --batch /tmp/tmpkey && rm /tmp/tmpkey
       - echo "personal-digest-preferences SHA512" >> /root/.gnupg/gpg.conf
 
       # Only TAG events are published to main
       - export COMPONENT=$([ "${DRONE_BUILD_EVENT}" = "tag" ] && echo "main" || echo "unstable")
       - export PKG_VER=$(dpkg-parsechangelog --show-field Version -ldebian/changelog)
 
       # Upload packages
-      - mv matrixio-kernel-modules_$${PKG_VER}_armhf.deb 
-           matrixio-kernel-modules_${DISTRIBUTION}-${CODENAME}-$${PKG_VER}-$${COMPONENT}_armhf.deb
+      - mv matrixio-kernel-modules_$${PKG_VER}_all.deb 
+           matrixio-kernel-modules_${DISTRIBUTION}-${CODENAME}-$${PKG_VER}-$${COMPONENT}_all.deb
 
       - echo "$${GPG_PASS}" | deb-s3 upload --bucket apt.matrix.one 
         --prefix $DISTRIBUTION
@@ -50,7 +51,7 @@ pipeline:
         --secret-access-key $${AWS_SECRET_ACCESS_KEY}
         --sign [email protected] 
         --gpg-options="--batch --passphrase-fd 0"
-        matrixio-kernel-modules_${DISTRIBUTION}-${CODENAME}-$${PKG_VER}-$${COMPONENT}_armhf.deb
+        matrixio-kernel-modules_${DISTRIBUTION}-${CODENAME}-$${PKG_VER}-$${COMPONENT}_all.deb
 
       # Render the notification template for the notify-slack step
       - j2 --var-delimiter '%%' .drone/slack.tpl > notification.tpl

debian/postinst

@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+DKMS_NAME=matrixio-kernel-modules
+DKMS_PACKAGE_NAME=$DKMS_NAME-dkms
+DKMS_VERSION=0.2.1
+
+postinst_found=0
+
+case "$1" in
+	configure)
+		for DKMS_POSTINST in /usr/lib/dkms/common.postinst /usr/share/$DKMS_PACKAGE_NAME/postinst; do
+			if [ -f $DKMS_POSTINST ]; then
+				$DKMS_POSTINST $DKMS_NAME $DKMS_VERSION /usr/share/$DKMS_PACKAGE_NAME "" $2
+				postinst_found=1
+				break
+			fi
+		done
+		if [ "$postinst_found" -eq 0 ]; then
+			echo "ERROR: DKMS version is too old and $DKMS_PACKAGE_NAME was not"
+			echo "built with legacy DKMS support."
+			echo "You must either rebuild $DKMS_PACKAGE_NAME with legacy postinst"
+			echo "support or upgrade DKMS to a more current version."
+			exit 1
+		else
+			echo "Enable configurations in /boot/config.txt"
+			cp /boot/config.txt /boot/config.txt.matrixio.bk \
+			&& /usr/share/matrixlabs/matrixio-devices/matrixlabs_edit_settings.py \
+			  /boot/config.txt.matrixio.bk \
+		   	  /usr/share/matrixlabs/matrixio-devices/config/kernel_modifications.txt > /boot/config.txt 
+		fi
+	;;
+esac
+