debian: Generate postinst devices list automatically at gbp import phase

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

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