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https://github.com/FairwindsOps/polaris.git
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54a4f92695
copy config.yaml to docker image enable external usage of dashboard package gofmt fix comment use packr for assets add gobuffalo/packr dependency add dependencies fix pointer issues add output-file option
96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cache
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"sync"
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)
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// Default returns the default cache to use, or nil if no cache should be used.
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func Default() *Cache {
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defaultOnce.Do(initDefaultCache)
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return defaultCache
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}
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var (
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defaultOnce sync.Once
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defaultCache *Cache
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)
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// cacheREADME is a message stored in a README in the cache directory.
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// Because the cache lives outside the normal Go trees, we leave the
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// README as a courtesy to explain where it came from.
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const cacheREADME = `This directory holds cached build artifacts from the Go build system.
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Run "go clean -cache" if the directory is getting too large.
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See golang.org to learn more about Go.
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`
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// initDefaultCache does the work of finding the default cache
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// the first time Default is called.
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func initDefaultCache() {
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dir, showWarnings := defaultDir()
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if dir == "off" {
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return
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}
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if err := os.MkdirAll(dir, 0777); err != nil {
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if showWarnings {
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fmt.Fprintf(os.Stderr, "go: disabling cache (%s) due to initialization failure: %s\n", dir, err)
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}
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return
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}
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if _, err := os.Stat(filepath.Join(dir, "README")); err != nil {
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// Best effort.
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ioutil.WriteFile(filepath.Join(dir, "README"), []byte(cacheREADME), 0666)
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}
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c, err := Open(dir)
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if err != nil {
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if showWarnings {
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fmt.Fprintf(os.Stderr, "go: disabling cache (%s) due to initialization failure: %s\n", dir, err)
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}
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return
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}
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defaultCache = c
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}
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// DefaultDir returns the effective GOCACHE setting.
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// It returns "off" if the cache is disabled.
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func DefaultDir() string {
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dir, _ := defaultDir()
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return dir
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}
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// defaultDir returns the effective GOCACHE setting.
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// It returns "off" if the cache is disabled.
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// The second return value reports whether warnings should
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// be shown if the cache fails to initialize.
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func defaultDir() (string, bool) {
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dir := os.Getenv("GOCACHE")
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if dir != "" {
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return dir, true
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}
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// Compute default location.
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dir, err := os.UserCacheDir()
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if err != nil {
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return "off", true
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}
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dir = filepath.Join(dir, "go-build")
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// Do this after filepath.Join, so that the path has been cleaned.
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showWarnings := true
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switch dir {
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case "/.cache/go-build":
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// probably docker run with -u flag
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// https://golang.org/issue/26280
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showWarnings = false
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}
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return dir, showWarnings
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}
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