CI: wiki: adjust for 'pmbootstrap ci' (MR 3608)

Add a wrapper .ci/wiki.sh, that pmbootstrap ci can run and use it in
gitlab-ci.yml. Add a .ci/lib/gitlab_prepare_ci.sh script that makes a
user available with sudo, as expected by the pmbootstrap ci compatible
scripts. Set up binfmt_misc too while at it, it will be needed for
running pmbootstrap.

The next patches will adjust the rest of the CI scripts and move the old
scripts in the .ci/lib dir, so only the scripts that should be called
directly are in the .ci dir.

Related: https://postmarketos.org/pmb-ci

.ci/check_devices_in_wiki.py → .ci/lib/check_devices_in_wiki.py

 #!/usr/bin/env python3
-# Copyright 2021 Oliver Smith
+# Copyright 2022 Oliver Smith
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 import argparse
@@ -13,7 +13,7 @@ def get_devices():
     """:returns: list of all devices"""
     ret = []
     pmaports = (os.path.realpath(os.path.join(os.path.dirname(__file__) +
-                "/..")))
+                "/../..")))
     for path in glob.glob(pmaports + "/device/*/device-*/"):
         device = os.path.dirname(path).split("device-", 1)[1]
 

.ci/lib/gitlab_prepare_ci.sh

+#!/bin/sh -e
+# Copyright 2022 Oliver Smith
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+if ! mount | grep -q /proc/sys/fs/binfmt_misc; then
+	echo "Mounting binfmt_misc"
+	mount -t binfmt_misc none /proc/sys/fs/binfmt_misc
+fi
+
+if id "build" > /dev/null 2>&1; then
+	echo "User 'build' exists already"
+else
+	echo "Creating build user"
+	adduser -D build
+	chown -R build:build .
+	echo 'build ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+fi

.ci/wiki.sh

+#!/bin/sh -e
+# Description: verify devices are documented in the wiki
+# Options: native
+# Run natively so we don't need to set up a chroot, python3 is the only dep.
+# https://postmarktos.org/pmb-ci
+
+if [ "$(id -u)" = 0 ]; then
+	set -x
+	apk -q add \
+		python3
+	exec su "${TESTUSER:-build}" -c "sh -e $0"
+fi
+
+set -x
+.ci/lib/check_devices_in_wiki.py --booting

.gitignore

@@ -20,7 +20,6 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
 lib64/
 parts/
 sdist/

.gitlab-ci.yml

@@ -31,10 +31,9 @@ wiki:
       - merge_requests
     changes:
       - device/*/device-*/*
-  before_script:
-    - apk -q add python3
   script:
-    - .ci/check_devices_in_wiki.py --booting
+    - .ci/lib/gitlab_prepare_ci.sh
+    - .ci/wiki.sh
 
 # testcases linting
 testcases-linting: