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// Copyright (C) 2021 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
//go:build ignore
// +build ignore
package main
import (
"bufio"
"flag"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
)
func main() {
var path string
flag.StringVar(&path, "t", "", "Name of file to prune")
flag.Parse()
filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
if err != nil {
log.Fatal(err)
}
if !info.Mode().IsRegular() {
return nil
}
err = pruneInterfaceCheck(path, info.Size())
if err != nil {
log.Fatal(err)
}
err = exec.Command("go", "run", "golang.org/x/tools/cmd/goimports", "-w", path).Run()
if err != nil {
log.Fatal(err)
}
return nil
})
}
func pruneInterfaceCheck(path string, size int64) error {
fd, err := os.Open(path)
if err != nil {
return err
}
defer fd.Close()
tmp, err := os.CreateTemp(".", "")
if err != nil {
return err
}
scanner := bufio.NewScanner(fd)
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(strings.TrimSpace(line), "var _ ") {
continue
}
if _, err := tmp.WriteString(line + "\n"); err != nil {
os.Remove(tmp.Name())
return err
}
}
if err := fd.Close(); err != nil {
return err
}
if err := os.Remove(path); err != nil {
return err
}
return os.Rename(tmp.Name(), path)
}
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