Add in-kernel test runner
This adds a way to run tests inside the Smalltown kernel.
Improvements to the Bazel part of this are tracked in T726
Test Plan: Tested by intentionally failing the test.
X-Origin-Diff: phab/D485
GitOrigin-RevId: e4aad7f28d122d82a7fcb6699e678cbe022e2f73
diff --git a/core/tools/kconfig-patcher/main.go b/core/tools/kconfig-patcher/main.go
new file mode 100644
index 0000000..27c33e9
--- /dev/null
+++ b/core/tools/kconfig-patcher/main.go
@@ -0,0 +1,95 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "bufio"
+ "encoding/json"
+ "flag"
+ "fmt"
+ "io"
+ "os"
+ "strings"
+)
+
+var (
+ inPath = flag.String("in", "", "Path to input Kconfig")
+ outPath = flag.String("out", "", "Path to output Kconfig")
+)
+
+func main() {
+ flag.Parse()
+ if *inPath == "" || *outPath == "" {
+ flag.PrintDefaults()
+ os.Exit(2)
+ }
+ inFile, err := os.Open(*inPath)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to open input Kconfig: %v\n", err)
+ os.Exit(1)
+ }
+ outFile, err := os.Create(*outPath)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to create output Kconfig: %v\n", err)
+ os.Exit(1)
+ }
+ var config struct {
+ Overrides map[string]string `json:"overrides"`
+ }
+ if err := json.Unmarshal([]byte(flag.Arg(0)), &config); err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to parse overrides: %v\n", err)
+ os.Exit(1)
+ }
+ err = patchKconfig(inFile, outFile, config.Overrides)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Failed to patch: %v\n", err)
+ os.Exit(1)
+ }
+}
+
+func patchKconfig(inFile io.Reader, outFile io.Writer, overrides map[string]string) error {
+ scanner := bufio.NewScanner(inFile)
+ for scanner.Scan() {
+ line := scanner.Text()
+ cleanLine := strings.TrimSpace(line)
+ if strings.HasPrefix(cleanLine, "#") || cleanLine == "" {
+ // Pass through comments and empty lines
+ fmt.Fprintln(outFile, line)
+ } else {
+ // Line contains a configuration option
+ parts := strings.SplitN(line, "=", 2)
+ keyName := parts[0]
+ if overrideVal, ok := overrides[strings.TrimSpace(keyName)]; ok {
+ // Override it
+ if overrideVal == "" {
+ fmt.Fprintf(outFile, "# %v is not set\n", keyName)
+ } else {
+ fmt.Fprintf(outFile, "%v=%v\n", keyName, overrideVal)
+ }
+ delete(overrides, keyName)
+ } else {
+ // Pass through unchanged
+ fmt.Fprintln(outFile, line)
+ }
+ }
+ }
+ // Process left over overrides
+ for key, val := range overrides {
+ fmt.Fprintf(outFile, "%v=%v\n", key, val)
+ }
+ return nil
+}