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// Copyright 2017 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.
// This file contains extra hooks for testing the go command.
//go:build testgo
// +build testgo
package work
import (
"cmd/go/internal/cfg"
"cmd/go/internal/search"
"fmt"
"os"
"path/filepath"
"runtime"
)
func init() {
if v := os.Getenv("TESTGO_VERSION"); v != "" {
runtimeVersion = v
}
if testGOROOT := os.Getenv("TESTGO_GOROOT"); testGOROOT != "" {
// Disallow installs to the GOROOT from which testgo was built.
// Installs to other GOROOTs — such as one set explicitly within a test — are ok.
allowInstall = func(a *Action) error {
if cfg.BuildN {
return nil
}
rel := search.InDir(a.Target, testGOROOT)
if rel == "" {
return nil
}
callerPos := ""
if _, file, line, ok := runtime.Caller(1); ok {
if shortFile := search.InDir(file, filepath.Join(testGOROOT, "src")); shortFile != "" {
file = shortFile
}
callerPos = fmt.Sprintf("%s:%d: ", file, line)
}
return fmt.Errorf("%stestgo must not write to GOROOT (installing to %s)", callerPos, filepath.Join("GOROOT", rel))
}
}
}
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