misc/android: cleaner to remove stale GOROOT files

Updates #10806

Change-Id: I734d6db026cc7c2e3099a76dc8db8e42b2b90aa7
Reviewed-on: https://go-review.googlesource.com/10390
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/misc/android/cleaner.go b/misc/android/cleaner.go
new file mode 100644 (file)
index 0000000..dafb162
--- /dev/null
+++ b/misc/android/cleaner.go
@@ -0,0 +1,39 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Cleaner removes anything from /data/local/tmp/goroot not on a builtin list.
+// Used by androidtest.bash.
+package main
+
+import (
+       "log"
+       "os"
+       "path/filepath"
+       "strings"
+)
+
+func main() {
+       const goroot = "/data/local/tmp/goroot"
+       expect := make(map[string]bool)
+       for _, f := range strings.Split(files, "\n") {
+               expect[filepath.Join(goroot, f)] = true
+       }
+
+       err := filepath.Walk(goroot, func(path string, info os.FileInfo, err error) error {
+               if expect[path] {
+                       return nil
+               }
+               log.Printf("removing %s", path)
+               if err := os.RemoveAll(path); err != nil {
+                       return err
+               }
+               if info.IsDir() {
+                       return filepath.SkipDir
+               }
+               return nil
+       })
+       if err != nil {
+               log.Fatal(err)
+       }
+}