CI: kconfig: don't print unrelated warnings (MR 3961)

Run the "pmbootstrap kconfig check" only on the kernels that have been
modified.

[ci:skip-build] already built successfully in CI

.ci/kconfig.sh

@@ -1,5 +1,5 @@
 #!/bin/sh -e
-# Description: check all kernel configs with 'pmbootstrap kconfig check'
+# Description: check modified kernel configs
 # Options: native
 # Use 'native' because it requires running pmbootstrap.
 # https://postmarketos.org/pmb-ci
@@ -11,12 +11,6 @@ if [ "$(id -u)" = 0 ]; then
 	exec su "${TESTUSER:-pmos}" -c "sh -e $0"
 fi
 
-# Wrap pmbootstrap to use this repository for --aports
-pmaports="$(cd "$(dirname "$0")"/..; pwd -P)"
-_pmbootstrap="$(command -v pmbootstrap)"
-pmbootstrap() {
-	"$_pmbootstrap" --aports="$pmaports" "$@"
-}
+export PYTHONUNBUFFERED=1
 
-set -x
-pmbootstrap kconfig check
+.ci/lib/check_changed_kernels.py

.ci/lib/check_changed_kernels.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+# Copyright 2023 Oliver Smith
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import glob
+import tempfile
+import sys
+import subprocess
+
+# Same dir
+import common
+
+# pmbootstrap
+import add_pmbootstrap_to_import_path  # noqa
+import pmb.parse
+import pmb.helpers.logging
+
+
+def check_kconfig(args, pkgnames):
+    last_failed = None
+    for i in range(len(pkgnames)):
+        pkgname = pkgnames[i]
+        print(f"  ({i+1}/{len(pkgnames)}) {pkgname}")
+
+        apkbuild_path = pmb.helpers.pmaports.find(args, pkgname)
+        apkbuild = pmb.parse._apkbuild.apkbuild(f"{apkbuild_path}/APKBUILD")
+
+        options = []
+
+        for opt in apkbuild["options"]:
+            if "pmb:kconfigcheck" in opt:
+                options += [opt]
+
+        if len(options):
+            options.sort()
+            print(f'options="{" ".join(options)}"')
+
+        if "!pmb:kconfigcheck" in apkbuild["options"]:
+            print("skipped (!pmb:kconfigcheck)")
+            continue
+
+        if not pmb.parse.kconfig.check(args, pkgname, details=True):
+            last_failed = pkgname
+
+    return last_failed
+
+
+def show_error(last_failed):
+    print("")
+    print("Please adjust your kernel config. This is required for getting your"
+          " patch merged.")
+    print("")
+    print("Edit your kernel config:")
+    print(f"  pmbootstrap kconfig edit {last_failed}")
+    print("")
+    print("Test this kernel config again:")
+    print(f"  pmbootstrap kconfig check {last_failed}")
+    print("")
+    print("Run this check again (on all kernels you modified):")
+    print("  pmbootstrap ci kconfig")
+    print("")
+
+
+if __name__ == "__main__":
+    common.add_upstream_git_remote()
+    pkgnames = common.get_changed_kernels()
+    print(f"Changed kernels: {pkgnames}")
+
+    if len(pkgnames) == 0:
+        print("No kernels changed in this branch")
+        exit(0)
+
+    # Initialize args (so we can use pmbootstrap's kconfig parsing)
+    sys.argv = ["pmbootstrap", "kconfig", "check"]
+    args = pmb.parse.arguments()
+    pmb.helpers.logging.init(args)
+
+    print("Running kconfig check on changed kernels...")
+    last_failed = check_kconfig(args, pkgnames)
+
+    if last_failed:
+        show_error(last_failed)
+        exit(1)

.ci/lib/common.py

@@ -190,3 +190,11 @@ def get_changed_packages():
         ret.add(os.path.basename(dirname))
 
     return ret
+
+
+def get_changed_kernels():
+    ret = []
+    for pkgname in get_changed_packages():
+        if pkgname.startswith("linux-"):
+            ret += [pkgname]
+    return ret