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Add ini-file example (using go-ini)
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12 files changed

+295
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‎examples/singleapp/ini_file/append/.gitignore‎

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config-updated.ini

‎examples/singleapp/ini_file/append/Taskfile.yml‎

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# https://taskfile.dev
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version: '3'
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tasks:
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default:
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cmds:
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- go run main.go
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- cmd: diff -u config.ini config-updated.ini
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ignore_error: true

‎examples/singleapp/ini_file/append/config.ini‎

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[General]
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AppName = MyApplication
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Version = 1.0.0
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License = MIT
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[Database]
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Host = localhost
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User = root
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Password =
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DatabaseName = my_database
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[Logging]
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; ログレベル
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Level = DEBUG
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; ログファイル
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LogFile = /var/log/myapp.log

‎examples/singleapp/ini_file/append/main.go‎

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package main
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import "gopkg.in/ini.v1"
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func main() {
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if err := run(); err != nil {
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panic(err)
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}
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}
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func run() error {
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//
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// iniファイル読み込み
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//
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var (
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cfg *ini.File
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err error
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)
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cfg, err = ini.Load("config.ini")
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if err != nil {
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return err
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}
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//
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// 既存のキーの値を変更
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//
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cfg.Section("Database").Key("User").SetValue("gitpod")
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//
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// 新しいセクションとキーの追加
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//
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newSection := cfg.Section("NewSection")
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newSection.Key("NewKey").SetValue("NewValue")
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//
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// 書き出し
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//
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if err := cfg.SaveTo("config-updated.ini"); err != nil {
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return err
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}
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return nil
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/*
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$ task
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task: [default] go run main.go
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task: [default] diff -u config.ini config-updated.ini
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--- config.ini 2024-01-17 05:18:00.670661597 +0000
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+++ config-updated.ini 2024-01-17 05:19:09.686594430 +0000
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@@ -5,7 +5,7 @@
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[Database]
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Host = localhost
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-User = root
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+User = gitpod
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Password =
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DatabaseName = my_database
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@@ -14,3 +14,6 @@
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Level = DEBUG
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; ログファイル
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LogFile = /var/log/myapp.log
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+
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+[NewSection]
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+NewKey = NewValue
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*/
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}

‎examples/singleapp/ini_file/read/Taskfile.yml‎

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# https://taskfile.dev
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version: '3'
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tasks:
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default:
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cmds:
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- go run main.go

‎examples/singleapp/ini_file/read/config.ini‎

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[General]
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AppName = MyApplication
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Version = 1.0.0
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License = MIT
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[Database]
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Host = localhost
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User = root
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Password =
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DatabaseName = my_database
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[Logging]
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; ログレベル
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Level = DEBUG
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; ログファイル
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LogFile = /var/log/myapp.log

‎examples/singleapp/ini_file/read/main.go‎

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package main
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import (
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"fmt"
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"gopkg.in/ini.v1"
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)
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func main() {
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if err := run(); err != nil {
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panic(err)
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}
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}
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func run() error {
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//
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// iniファイル読み込み
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//
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var (
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cfg *ini.File
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err error
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)
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cfg, err = ini.Load("config.ini")
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if err != nil {
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return err
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}
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//
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// セクション取得
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//
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var (
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secGeneral *ini.Section
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secDatabase *ini.Section
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secLogging *ini.Section
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)
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secGeneral = cfg.Section("General")
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secDatabase = cfg.Section("Database")
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secLogging = cfg.Section("Logging")
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//
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// キー取得
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//
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var (
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keyVersion *ini.Key
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keyHost *ini.Key
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keyLevel *ini.Key
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)
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keyVersion = secGeneral.Key("Version")
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keyHost = secDatabase.Key("Host")
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keyLevel = secLogging.Key("Level")
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//
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// 値取得
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// *ini.Keyにいろいろな型で値を取得するメソッドが用意されている
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//
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fmt.Printf("Version=%s\n", keyVersion.String())
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fmt.Printf("Host=%s\n", keyHost.MustString("unknown"))
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fmt.Printf("Level=%s (%s)\n", keyLevel.Value(), keyLevel.Comment)
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return nil
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/*
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$ task
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task: [default] go run main.go
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Version=1.0.0
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Host=localhost
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Level=DEBUG (; ログレベル)
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*/
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}

‎examples/singleapp/ini_file/write/.gitignore‎

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config.ini

‎examples/singleapp/ini_file/write/Taskfile.yml‎

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# https://taskfile.dev
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version: '3'
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tasks:
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default:
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cmds:
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- go run main.go
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- cat config.ini

‎examples/singleapp/ini_file/write/main.go‎

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package main
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import "gopkg.in/ini.v1"
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func main() {
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if err := run(); err != nil {
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panic(err)
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}
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}
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func run() error {
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//
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// 空のiniファイルを用意
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//
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cfg := ini.Empty()
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//
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// セクションの追加
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//
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var (
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secGeneral *ini.Section
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secDatabase *ini.Section
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secLogger *ini.Section
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)
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secGeneral = cfg.Section("General")
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secDatabase = cfg.Section("Database")
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secLogger = cfg.Section("Logging")
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//
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// キーと値の追加
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//
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secGeneral.NewKey("AppName", "MyApplication")
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secGeneral.NewKey("Version", "1.0.0")
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secGeneral.NewKey("License", "MIT")
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secDatabase.NewKey("Host", "localhost")
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secDatabase.NewKey("User", "root")
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secDatabase.NewKey("Password", "")
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secDatabase.NewKey("DatabaseName", "my_database")
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secLogger.NewKey("Level", "DEBUG")
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key, _ := secLogger.NewKey("LogFile", "/var/log/myapp.log")
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key.Comment = "ログファイル"
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//
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// 書き出し
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//
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if err := cfg.SaveTo("config.ini"); err != nil {
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return err
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}
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return nil
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/*
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$ task
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task: [default] go run main.go
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task: [default] cat config.ini
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[General]
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AppName = MyApplication
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Version = 1.0.0
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License = MIT
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[Database]
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Host = localhost
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User = root
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Password =
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DatabaseName = my_database
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[Logging]
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Level = DEBUG
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; ログファイル
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LogFile = /var/log/myapp.log
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*/
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}

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