debian: Generate postinst devices list automatically at gbp import phase

Alternatively provide a script to keep the post-inst script updated

debian/README.source

@@ -1,19 +1,10 @@
-The libfprint0 postinst script calls udevadmin trigger for all the supported
-USB readers. The list of readers used in that file is generated by calling the
-following awk script:
+The libfprint-2-2 postinst script calls udevadmin trigger for all the supported
+USB readers. The list of readers used in that file is generated using the gbp
+import hook when `gbp import-orig` (via --uscan or with a tarball) is used.
 
-  /plugdev/ {
-          printf ("\tudevadm trigger --action=add " )
-          for (i=1;i<=NF; i++){
-                  if (match($i,/idVendor/)>0) {
-                          match($i, /"[^"]*"/); printf ("--attr-match=idVendor=%s ",substr($i,RSTART+1,RLENGTH-2))
-                  }
-                  if (match($i,/idProduct/)>0) {
-                          match($i, /"[^"]*"/); printf ("--attr-match=idProduct=%s",substr($i,RSTART+1,RLENGTH-2))
-                  }
-          };
-          printf("\n")
-  }
+Alternatively it can be called manually by using:
+
+  GBP_SOURCES_DIR=. debian/update-udev-triggers.sh
 
 When preparing a new upstream release, this script should be called against the
-udev .rules file generated during the build of the package
+upstream provided .hwdb file.

debian/gbp-post-import-hook.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+dch -v"$GBP_DEBIAN_VERSION" "New upstream release"
+git add debian/changelog
+debcommit
+
+debian/update-udev-triggers.sh

debian/gbp.conf

@@ -10,7 +10,7 @@ sign-tags = True
 multimaint-merge = True
 
 [import-orig]
-postimport = dch -v%(version)s New upstream release; git add debian/changelog; debcommit
+postimport = debian/gbp-post-import-hook.sh
 
 [pq]
 patch-numbers = False

debian/libfprint-2-2.postinst

@@ -5,10 +5,12 @@ set -e
 #DEBHELPER#
 
 if [ "$1" = "configure" -o "$1" = "upgrade" ] && command -V udevadm >/dev/null 2>&1; then
-	# apply udev rules at package installation, see
+	# apply hwdb rules at package installation, see
 	# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683863#27>
 	# NOTA BENE: after the DEBHELPER section since dh_installudev
 	# adds stuff there
+	# The devices ID list is auto-generated using the gbp postimport hook
+	# see debian/README.sources for more details.
 	udevadm trigger --action=add --attr-match=idVendor=147e --attr-match=idProduct=2016
 	udevadm trigger --action=add --attr-match=idVendor=147e --attr-match=idProduct=2020
 	udevadm trigger --action=add --attr-match=idVendor=138a --attr-match=idProduct=0010

debian/libfprint-2-2.postinst.in

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+#DEBHELPER#
+
+if [ "$1" = "configure" -o "$1" = "upgrade" ] && command -V udevadm >/dev/null 2>&1; then
+	# apply hwdb rules at package installation, see
+	# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683863#27>
+	# NOTA BENE: after the DEBHELPER section since dh_installudev
+	# adds stuff there
+	# The devices ID list is auto-generated using the gbp postimport hook
+	# see debian/README.sources for more details.
+${UDEVADM_TRIGGERS}
+fi
+
+exit 0

debian/update-udev-triggers.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+
+srcdir="${GBP_SOURCES_DIR:-.}"
+debpath="$(dirname "$0")"
+autosuspend_file="$srcdir/data/autosuspend.hwdb"
+commands_lines=()
+
+while IFS= read -r line; do
+    if [[ $line =~ ^usb:v([A-Fa-f0-9]{4})p([A-Fa-f0-9]{4}) ]]; then
+        vendor="$(echo "${BASH_REMATCH[1]}" | tr '[:upper:]' '[:lower:]')"
+        product="$(echo "${BASH_REMATCH[2]}" | tr '[:upper:]' '[:lower:]')"
+        commands_lines+=("\tudevadm trigger --action=add --attr-match=idVendor=$vendor --attr-match=idProduct=$product")
+    fi
+done < "$autosuspend_file"
+
+export UDEVADM_TRIGGERS=$( IFS=$'\n'; echo -e "${commands_lines[*]}" )
+
+for i in $debpath/libfprint-*.post*.in; do
+    out="${i%.in}"
+    envsubst < "$i" > "$out"
+
+    if [ -n "$GBP_BRANCH" ]; then
+        if ! git diff-index --quiet HEAD -- "$out"; then
+            git add "$out"
+            dch "${out#$srcdir}: Devices triggers updated"
+            git add debian/changelog
+            debcommit
+        fi
+    fi
+done