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61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package cmdenv provides access to certain variable for both command options and environment.
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package cmdenv
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import (
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"os"
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"regexp"
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"strings"
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"github.com/gogf/gf/container/gvar"
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)
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var (
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// Console options.
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cmdOptions = make(map[string]string)
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)
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func init() {
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doInit()
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}
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// doInit does the initialization for this package.
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func doInit() {
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reg := regexp.MustCompile(`\-\-{0,1}(.+?)=(.+)`)
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for i := 0; i < len(os.Args); i++ {
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result := reg.FindStringSubmatch(os.Args[i])
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if len(result) > 1 {
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cmdOptions[result[1]] = result[2]
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}
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}
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}
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// Get returns the command line argument of the specified <key>.
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// If the argument does not exist, then it returns the environment variable with specified <key>.
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// It returns the default value <def> if none of them exists.
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//
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// Fetching Rules:
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// 1. Command line arguments are in lowercase format, eg: gf.<package name>.<variable name>;
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// 2. Environment arguments are in uppercase format, eg: GF_<package name>_<variable name>；
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func Get(key string, def ...interface{}) *gvar.Var {
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value := interface{}(nil)
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if len(def) > 0 {
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value = def[0]
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}
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cmdKey := strings.ToLower(strings.Replace(key, "_", ".", -1))
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if v, ok := cmdOptions[cmdKey]; ok {
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value = v
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} else {
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envKey := strings.ToUpper(strings.Replace(key, ".", "_", -1))
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if v := os.Getenv(envKey); v != "" {
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value = v
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}
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}
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return gvar.New(value)
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}
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