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Merge pull request #498 from bilibili/kratos/upgrade
upgrade kratos
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "path/filepath" | ||
| "sync" | ||
| ) | ||
|
|
||
| var envCache struct { | ||
| once sync.Once | ||
| m map[string]string | ||
| } | ||
|
|
||
| // EnvFile returns the name of the Go environment configuration file. | ||
| func EnvFile() (string, error) { | ||
| if file := os.Getenv("GOENV"); file != "" { | ||
| if file == "off" { | ||
| return "", fmt.Errorf("GOENV=off") | ||
| } | ||
| return file, nil | ||
| } | ||
| dir, err := os.UserConfigDir() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| if dir == "" { | ||
| return "", fmt.Errorf("missing user-config dir") | ||
| } | ||
| return filepath.Join(dir, "go/env"), nil | ||
| } | ||
|
|
||
| func initEnvCache() { | ||
| envCache.m = make(map[string]string) | ||
| file, _ := EnvFile() | ||
| if file == "" { | ||
| return | ||
| } | ||
| data, err := ioutil.ReadFile(file) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
||
| for len(data) > 0 { | ||
| // Get next line. | ||
| line := data | ||
| i := bytes.IndexByte(data, '\n') | ||
| if i >= 0 { | ||
| line, data = line[:i], data[i+1:] | ||
| } else { | ||
| data = nil | ||
| } | ||
|
|
||
| i = bytes.IndexByte(line, '=') | ||
| if i < 0 || line[0] < 'A' || 'Z' < line[0] { | ||
| // Line is missing = (or empty) or a comment or not a valid env name. Ignore. | ||
| // (This should not happen, since the file should be maintained almost | ||
| // exclusively by "go env -w", but better to silently ignore than to make | ||
| // the go command unusable just because somehow the env file has | ||
| // gotten corrupted.) | ||
| continue | ||
| } | ||
| key, val := line[:i], line[i+1:] | ||
| envCache.m[string(key)] = string(val) | ||
| } | ||
| } | ||
|
|
||
| // Getenv gets the value from env or configuration. | ||
| func Getenv(key string) string { | ||
| val := os.Getenv(key) | ||
| if val != "" { | ||
| return val | ||
| } | ||
| envCache.once.Do(initEnvCache) | ||
| return envCache.m[key] | ||
| } |
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