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// run
// Copyright 2020 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.
// Check that batch files are maintained as CRLF files (consistent
// behavior on all operating systems). See golang.org/issue/37791.
package main
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"strings"
)
func main() {
// Ensure that the GOROOT/src/all.bat file exists and has strict CRLF line endings.
enforceBatchStrictCRLF(filepath.Join(runtime.GOROOT(), "src", "all.bat"))
// Walk the entire Go repository source tree (without GOROOT/pkg),
// skipping directories that start with "." and named "testdata",
// and ensure all .bat files found have exact CRLF line endings.
err := filepath.WalkDir(runtime.GOROOT(), func(path string, d os.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() && (strings.HasPrefix(d.Name(), ".") || d.Name() == "testdata") {
return filepath.SkipDir
}
if path == filepath.Join(runtime.GOROOT(), "pkg") {
// GOROOT/pkg is known to contain generated artifacts, not source code.
// Skip it to avoid false positives. (Also see golang.org/issue/37929.)
return filepath.SkipDir
}
if filepath.Ext(d.Name()) == ".bat" {
enforceBatchStrictCRLF(path)
}
return nil
})
if err != nil {
log.Fatalln(err)
}
}
func enforceBatchStrictCRLF(path string) {
b, err := ioutil.ReadFile(path)
if err != nil {
log.Fatalln(err)
}
cr, lf := bytes.Count(b, []byte{13}), bytes.Count(b, []byte{10})
crlf := bytes.Count(b, []byte{13, 10})
if cr != crlf || lf != crlf {
if rel, err := filepath.Rel(runtime.GOROOT(), path); err == nil {
// Make the test failure more readable by showing a path relative to GOROOT.
path = rel
}
fmt.Printf("Windows batch file %s does not use strict CRLF line termination.\n", path)
fmt.Printf("Please convert it to CRLF before checking it in due to golang.org/issue/37791.\n")
os.Exit(1)
}
}
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