CI: Add deviceinfo linting via dint

Needs https://gitlab.postmarketos.org/postmarketOS/pmbootstrap/-/merge_requests/2679
to run locally.

Tested and works locally with 'pmbootstrap ci' as well as in GitLab CI.

Closes https://gitlab.postmarketos.org/postmarketOS/pmaports/-/issues/2583

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7006>

.ci/dint.sh

@@ -0,0 +1,13 @@
+#!/bin/sh -e
+# Description: Validate and lint deviceinfo files
+# Options: with-dot-git
+# https://postmarketos.org/pmb-ci
+
+if [ "$(id -u)" = 0 ]; then
+	set -x
+	apk add git python3
+	apk add dint --allow-untrusted --repository=https://mirror.postmarketos.org/postmarketos/master
+	exec su "${TESTUSER:-build}" -c "sh -e $0"
+fi
+
+.ci/lib/deviceinfo_linting.py

.ci/lib/deviceinfo_linting.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+# Copyright 2025 Stefan Hansson
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import common
+import os.path
+import subprocess
+import sys
+
+if __name__ == "__main__":
+    common.add_upstream_git_remote()
+    deviceinfo_files = {file for file in common.get_changed_files(removed=False)
+                        if os.path.basename(file) == "deviceinfo"}
+
+    try:
+        subprocess.run(["dint", "check", *deviceinfo_files], text=True, check=True)
+    except subprocess.CalledProcessError as exception:
+        sys.exit(exception.returncode)

.gitlab-ci.yml

@@ -101,6 +101,19 @@ aport-lint:
     - .ci/apkbuild-lint.sh
   allow_failure: true
 
+# deviceinfo linting
+dint:
+  stage: lint
+  rules:
+    - if: *mr_rule
+      changes:
+        - .ci/**/*
+        - .gitlab-ci.yml
+        - device/*/device-*/deviceinfo
+  script:
+    - .ci/lib/gitlab_prepare_ci.sh
+    - .ci/dint.sh
+
 # kernel kconfig check
 kernel-kconfig:
   stage: lint