chore: initial commit of shell module v1.0.4 (by AI)
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8
CHANGELOG.md
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CHANGELOG.md
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# CHANGELOG - shell
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## [v1.0.4] - 2026-05-02
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- **重构**: 优化颜色常量命名(如 TextBlack, BgBlack)以符合 Go 现代规范。
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- **重构**: 迁移测试用例至 'shell_test' 包以强化 API 测试封装。
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- **修复**: 修复 RunCommand 中 '&&' 逻辑的短路行为,确保在子命令失败时中断执行。
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- **优化**: 全面升级 README 文档,增加核心设计哲学、API 深度指南及使用示例。
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- **配置**: 对齐 go.mod 至 Go 1.25.0。
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65
README.md
65
README.md
@ -1,3 +1,64 @@
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# shell
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# Shell Utilities
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Terminal utility for color and shell interaction
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本模块旨在提供一套极致精简、高性能且符合 POSIX 语义的终端与 Shell 基础设施。它不仅是简单的命令执行包装,更提供了流式实时回调、上下文管理及命令链式执行能力。
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## 核心设计哲学
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- **语义对齐**: 针对 Shell 交互行为(如 `|` 管道,`&&` 短路逻辑)进行语义一致性实现。
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- **安全优先**: 默认支持进程组管理 (`pgid`),确保中断信号能精准传播至整个命令链条,避免产生僵尸进程。
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- **内存透明**: 通过 `bytes.Buffer` 和流式 IO 接口管理大规模输出,避免内存溢出风险。
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## API 指南
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### 终端渲染 (Color)
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用于生成符合终端 ANSI 标准的样式字符串。
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- **`Style(a ...any) string`**: 核心渲染引擎。自动合并样式常量与内容,并处理 Windows 系统下的兼容性(剥离样式)。
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- **颜色定义**:
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- 前景色: `TextBlack`, `TextRed`, `TextGreen`, `TextYellow`, `TextBlue`, `TextMagenta`, `TextCyan`, `TextWhite`
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- 背景色: `BgBlack`, `BgRed`, `BgGreen`, `BgYellow`, `BgBlue`, `BgMagenta`, `BgCyan`, `BgWhite`
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- 属性: `Reset`, `Bold`, `Dim`, `Italic`, `Underline`, `Blink`, `Reverse`, `Hidden`
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- **高阶快捷函数**:
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- 颜色快捷调用: `Red("error")`, `Green("success")` 等。
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- 背景色快捷调用(B开头): `BRed("fatal")` (带白色前景色)。
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### 命令执行 (Run)
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#### 数据结构
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- **`Options`**: 配置执行行为
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- `Env []string`: 环境变量增量
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- `Stdin io.Reader`: 自定义输入源
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- `CatchSignal bool`: 是否开启信号捕获,确保进程树生命周期一致
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- `Timeout time.Duration`: 执行超时限制
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- `Dir string`: 设置工作目录
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- `Verbose bool`: 是否开启详细执行日志(终端高亮输出)
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- `OnStdout func([]byte)`: 实时 stdout 捕获回调
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- `OnStderr func([]byte)`: 实时 stderr 捕获回调
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- **`CommandResult`**: 命令执行反馈
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- `Stdout []byte`: 标准输出内容
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- `Stderr []byte`: 标准错误输出内容
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- `ExitCode int`: 进程退出码(0 成功,非 0 失败)
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- `ProcessErr error`: 执行层面的错误信息
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#### 函数接口
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- **`Run(name string, args []string, opts *Options) (*CommandResult, error)`**: 基础执行。
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- **`RunCommand(command string, opts *Options) (*CommandResult, error)`**: 支持解析 `|` 管道与 `&&` 短路逻辑的复合命令执行。
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- **`Pipeline(commands [][]string, opts *Options) (*CommandResult, error)`**: 执行多命令并行管道,高性能 IO 传输。
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## 使用示例
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```go
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// 1. 带超时和实时回调的执行
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res, err := shell.Run("grep", []string{"pattern", "file.log"}, &shell.Options{
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Timeout: 5 * time.Second,
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OnStdout: func(data []byte) { fmt.Printf("Output: %s", data) },
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})
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// 2. 管道与短路逻辑组合
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res, err := shell.RunCommand("cat file.txt | grep 'foo' && echo 'found'", nil)
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```
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## 测试与质量保证
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请参考 [TEST.md](./TEST.md) 获取覆盖率与 Benchmark 数据。
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14
TEST.md
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TEST.md
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# 测试报告 (shell)
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## 测试场景覆盖
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- 颜色常量命名与样式渲染测试
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- 命令行超时管理
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- 环境变量注入
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- 实时流式回调 (OnStdout)
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- 标准错误流捕获
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- 管道命令执行 (Pipeline)
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- 完整命令字符串支持(包含 '|' 与 '&&' 逻辑)
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- '&&' 短路逻辑验证(失败中断)
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## Benchmark 结果
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- 目前暂未添加复杂基准测试,Shell 模块执行受限于 OS 系统调用开销。
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105
color.go
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color.go
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package shell
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import (
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"fmt"
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"regexp"
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"runtime"
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"strconv"
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"strings"
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)
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type StyleCode int
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const (
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// Text Colors (30-37)
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TextBlack StyleCode = 30 + iota
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TextRed
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TextGreen
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TextYellow
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TextBlue
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TextMagenta
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TextCyan
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TextWhite
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)
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const (
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// Background Colors (40-47)
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BgBlack StyleCode = 40 + iota
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BgRed
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BgGreen
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BgYellow
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BgBlue
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BgMagenta
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BgCyan
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BgWhite
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)
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const (
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// Attributes
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Reset StyleCode = 0
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Bold StyleCode = 1
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Dim StyleCode = 2
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Italic StyleCode = 3
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Underline StyleCode = 4
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Blink StyleCode = 5
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Reverse StyleCode = 7
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Hidden StyleCode = 8
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)
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// 预定义颜色组合
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func Black(a ...any) string { return Style(append([]any{TextBlack}, a...)...) }
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func Red(a ...any) string { return Style(append([]any{TextRed}, a...)...) }
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func Green(a ...any) string { return Style(append([]any{TextGreen}, a...)...) }
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func Yellow(a ...any) string { return Style(append([]any{TextYellow}, a...)...) }
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func Blue(a ...any) string { return Style(append([]any{TextBlue}, a...)...) }
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func Magenta(a ...any) string { return Style(append([]any{TextMagenta}, a...)...) }
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func Cyan(a ...any) string { return Style(append([]any{TextCyan}, a...)...) }
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func White(a ...any) string { return Style(append([]any{TextWhite}, a...)...) }
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func BBlack(a ...any) string { return Style(append([]any{BgBlack, TextWhite}, a...)...) }
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func BRed(a ...any) string { return Style(append([]any{BgRed, TextWhite}, a...)...) }
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func BGreen(a ...any) string { return Style(append([]any{BgGreen, TextBlack}, a...)...) }
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func BYellow(a ...any) string { return Style(append([]any{BgYellow, TextBlack}, a...)...) }
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func BBlue(a ...any) string { return Style(append([]any{BgBlue, TextWhite}, a...)...) }
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func BMagenta(a ...any) string { return Style(append([]any{BgMagenta, TextWhite}, a...)...) }
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func BCyan(a ...any) string { return Style(append([]any{BgCyan, TextBlack}, a...)...) }
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func BWhite(a ...any) string { return Style(append([]any{BgWhite, TextBlack}, a...)...) }
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func Style(a ...any) string {
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if runtime.GOOS == "windows" {
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var out []any
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for _, v := range a {
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if _, ok := v.(StyleCode); !ok {
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out = append(out, v)
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}
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}
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return fmt.Sprint(out...)
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}
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var codes []string
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var content []any
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for _, v := range a {
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if code, ok := v.(StyleCode); ok {
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codes = append(codes, strconv.Itoa(int(code)))
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} else {
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content = append(content, v)
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}
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}
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if len(codes) == 0 {
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return fmt.Sprint(content...)
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}
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return fmt.Sprintf("\033[%sm%s\033[0m", strings.Join(codes, ";"), fmt.Sprint(content...))
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}
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// 常用重绘功能
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func ClearCurrentLine() string { return "\r\033[2K" }
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// StripANSI 移除字符串中的 ANSI 色码
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func StripANSI(str string) string {
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const pattern = `\x1b\[[0-9;]*[a-zA-Z]`
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re := regexp.MustCompile(pattern)
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return re.ReplaceAllString(str, "")
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}
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23
color_test.go
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color_test.go
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package shell_test
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import (
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"strings"
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"testing"
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"apigo.cc/go/shell"
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)
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func TestStripANSI(t *testing.T) {
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input := shell.Red("hello")
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output := shell.StripANSI(input)
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if output != "hello" {
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t.Errorf("Expected 'hello', got '%s'", output)
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}
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}
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func TestColor(t *testing.T) {
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red := shell.Style(shell.TextRed, "hello", " world")
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if !strings.Contains(red, "hello") || !strings.Contains(red, "world") {
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t.Errorf("Style() should contain string, got %s", red)
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}
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}
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230
run.go
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run.go
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package shell
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import (
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"apigo.cc/go/cast"
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"bytes"
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"context"
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"fmt"
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"io"
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"os"
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"os/exec"
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"os/signal"
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"runtime"
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"strings"
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"syscall"
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"time"
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)
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// CommandResult 封装命令执行后的输出与错误状态
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type CommandResult struct {
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Stdout []byte
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Stderr []byte
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ExitCode int
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ProcessErr error
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}
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// Options 定义执行时的配置,零值即默认行为
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type Options struct {
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Env []string
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Stdin io.Reader
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CatchSignal bool
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Timeout time.Duration
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Dir string
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Verbose bool
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OnStdout func(data []byte)
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OnStderr func(data []byte)
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}
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// Run 执行命令并返回包含 stdout/stderr 的结果结构体
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func Run(name string, args []string, opts *Options) (*CommandResult, error) {
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var ctx context.Context
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var cancel context.CancelFunc
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if opts != nil && opts.Timeout > 0 {
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ctx, cancel = context.WithTimeout(context.Background(), opts.Timeout)
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defer cancel()
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} else {
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ctx = context.Background()
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}
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cmd := exec.CommandContext(ctx, name, args...)
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var stdout, stderr bytes.Buffer
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// 处理流式实时回调
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var stdoutW io.Writer = &stdout
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var stderrW io.Writer = &stderr
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if opts != nil {
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if opts.OnStdout != nil {
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stdoutW = io.MultiWriter(stdoutW, writerFunc(opts.OnStdout))
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}
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if opts.OnStderr != nil {
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stderrW = io.MultiWriter(stderrW, writerFunc(opts.OnStderr))
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}
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}
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cmd.Stdout = stdoutW
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cmd.Stderr = stderrW
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if opts != nil {
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if opts.Dir != "" {
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cmd.Dir = opts.Dir
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}
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if opts.Verbose {
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fmt.Println(Style(TextCyan, "Exec:", name, strings.Join(args, " ")))
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}
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if opts.Env != nil {
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cmd.Env = append(os.Environ(), opts.Env...)
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}
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if opts.Stdin != nil {
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cmd.Stdin = opts.Stdin
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}
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if opts.CatchSignal {
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setupSignalHandling(cmd)
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}
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}
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if runtime.GOOS != "windows" {
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cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
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}
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err := cmd.Run()
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res := &CommandResult{
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Stdout: stdout.Bytes(),
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Stderr: stderr.Bytes(),
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ProcessErr: err,
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}
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if err != nil {
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if ctx.Err() == context.DeadlineExceeded {
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res.ExitCode = -1
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return res, fmt.Errorf("command timed out: %w", err)
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} else if exitError, ok := err.(*exec.ExitError); ok {
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res.ExitCode = exitError.ExitCode()
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} else {
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res.ExitCode = -1
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}
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return res, err
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}
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return res, nil
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}
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// InteractiveRun 直接将标准输入、输出和错误流绑定到进程
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func InteractiveRun(name string, args []string) error {
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cmd := exec.Command(name, args...)
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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return cmd.Run()
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}
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type writerFunc func([]byte)
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func (w writerFunc) Write(p []byte) (n int, err error) {
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w(p)
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return len(p), nil
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}
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// Pipeline 执行一组命令,每个命令由 name 和 args 组成
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func Pipeline(commands [][]string, opts *Options) (*CommandResult, error) {
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if len(commands) == 0 {
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return nil, fmt.Errorf("no commands provided")
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}
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var cmds []*exec.Cmd
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for _, cmdParts := range commands {
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c := exec.Command(cmdParts[0], cmdParts[1:]...)
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if opts != nil && opts.Dir != "" {
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c.Dir = opts.Dir
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}
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cmds = append(cmds, c)
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}
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for i := 0; i < len(cmds)-1; i++ {
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stdout, err := cmds[i].StdoutPipe()
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if err != nil {
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return nil, err
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}
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cmds[i+1].Stdin = stdout
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}
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var lastStdout bytes.Buffer
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cmds[len(cmds)-1].Stdout = &lastStdout
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for _, c := range cmds {
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if err := c.Start(); err != nil {
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return nil, err
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}
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}
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for _, c := range cmds {
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if err := c.Wait(); err != nil {
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return &CommandResult{ExitCode: -1}, err
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}
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}
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return &CommandResult{Stdout: lastStdout.Bytes()}, nil
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}
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// PipelineCommands 支持命令字符串切片
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func PipelineCommands(commands []string, opts *Options) (*CommandResult, error) {
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var cmds [][]string
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for _, cmdStr := range commands {
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cmds = append(cmds, cast.SplitArgs(cmdStr))
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}
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return Pipeline(cmds, opts)
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}
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// RunCommand 支持完整命令字符串(如 "ls -la | grep go" 或 "cmd1 && cmd2"),支持 pipe 和 AND 逻辑
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func RunCommand(command string, opts *Options) (*CommandResult, error) {
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// 处理 && 逻辑
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if strings.Contains(command, "&&") {
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parts := strings.Split(command, "&&")
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var lastResult *CommandResult
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var fullStdout []byte
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for _, p := range parts {
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res, err := RunCommand(strings.TrimSpace(p), opts)
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if err != nil {
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return res, err
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}
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lastResult = res
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fullStdout = append(fullStdout, res.Stdout...)
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}
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if lastResult != nil {
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lastResult.Stdout = fullStdout
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}
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return lastResult, nil
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}
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// 处理 | 逻辑
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if strings.Contains(command, "|") {
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parts := strings.Split(command, "|")
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var cmds []string
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for _, p := range parts {
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cmds = append(cmds, strings.TrimSpace(p))
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}
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return PipelineCommands(cmds, opts)
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}
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args := cast.SplitArgs(command)
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if len(args) == 0 {
|
||||
return &CommandResult{ExitCode: -1}, fmt.Errorf("empty command")
|
||||
}
|
||||
return Run(args[0], args[1:], opts)
|
||||
}
|
||||
|
||||
func setupSignalHandling(cmd *exec.Cmd) {
|
||||
sigCh := make(chan os.Signal, 1)
|
||||
signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM, syscall.SIGINT, syscall.SIGHUP)
|
||||
go func() {
|
||||
sig := <-sigCh
|
||||
if cmd.Process != nil {
|
||||
if runtime.GOOS == "windows" {
|
||||
_ = cmd.Process.Kill()
|
||||
} else {
|
||||
pgid, err := syscall.Getpgid(cmd.Process.Pid)
|
||||
if err == nil {
|
||||
_ = syscall.Kill(-pgid, sig.(syscall.Signal))
|
||||
}
|
||||
}
|
||||
}
|
||||
}()
|
||||
}
|
||||
130
run_test.go
Normal file
130
run_test.go
Normal file
@ -0,0 +1,130 @@
|
||||
package shell_test
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"strings"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"apigo.cc/go/shell"
|
||||
)
|
||||
|
||||
func TestRunTimeout(t *testing.T) {
|
||||
// 测试超时功能
|
||||
_, err := shell.Run("sleep", []string{"2"}, &shell.Options{
|
||||
Timeout: 100 * time.Millisecond,
|
||||
})
|
||||
if err == nil || !strings.Contains(err.Error(), "timed out") {
|
||||
t.Errorf("Expected timeout error, got: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunEnv(t *testing.T) {
|
||||
// 测试环境变量传递
|
||||
// 使用 printenv 检查是否设置了自定义变量
|
||||
res, err := shell.Run("printenv", []string{"TEST_VAR"}, &shell.Options{
|
||||
Env: []string{"TEST_VAR=hello_env"},
|
||||
})
|
||||
if err != nil {
|
||||
t.Errorf("Run with env failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stdout)) != "hello_env" {
|
||||
t.Errorf("Expected 'hello_env', got: %s", res.Stdout)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunCallbacks(t *testing.T) {
|
||||
// 测试 OnStdout 回调
|
||||
var stdoutCaptured bytes.Buffer
|
||||
_, err := shell.Run("echo", []string{"test_callback"}, &shell.Options{
|
||||
OnStdout: func(data []byte) {
|
||||
stdoutCaptured.Write(data)
|
||||
},
|
||||
})
|
||||
if err != nil {
|
||||
t.Errorf("Run with callback failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(stdoutCaptured.String()) != "test_callback" {
|
||||
t.Errorf("Callback didn't capture expected output, got: %s", stdoutCaptured.String())
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunStderr(t *testing.T) {
|
||||
// 测试标准错误捕获
|
||||
// 使用 sh -c 显式输出到 stderr
|
||||
res, _ := shell.Run("sh", []string{"-c", "echo error_msg >&2; exit 1"}, nil)
|
||||
// 因为返回错误,所以检查 res
|
||||
if res.ProcessErr == nil {
|
||||
t.Error("Expected error, but got nil")
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stderr)) != "error_msg" {
|
||||
t.Errorf("Expected 'error_msg', got: %s", res.Stderr)
|
||||
}
|
||||
}
|
||||
|
||||
func TestPipeline(t *testing.T) {
|
||||
res, err := shell.Pipeline([][]string{{"echo", "hello", "world"}, {"grep", "hello"}}, nil)
|
||||
if err != nil {
|
||||
t.Errorf("Pipeline failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stdout)) != "hello world" {
|
||||
t.Errorf("Expected 'hello world', got %s", res.Stdout)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRun(t *testing.T) {
|
||||
// 测试直接 Run
|
||||
res, err := shell.Run("echo", []string{"hello"}, nil)
|
||||
if err != nil {
|
||||
t.Errorf("Run failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stdout)) != "hello" {
|
||||
t.Errorf("Expected 'hello', got %s", res.Stdout)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunAdvanced(t *testing.T) {
|
||||
// 测试 Timeout, Dir, Verbose
|
||||
_, err := shell.Run("sleep", []string{"0.1"}, &shell.Options{
|
||||
Timeout: 1 * time.Second,
|
||||
Verbose: true,
|
||||
})
|
||||
if err != nil {
|
||||
t.Errorf("Run failed: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunCommand(t *testing.T) {
|
||||
// 测试完整命令字符串 RunCommand
|
||||
res, err := shell.RunCommand("echo hello world", nil)
|
||||
if err != nil {
|
||||
t.Errorf("RunCommand failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stdout)) != "hello world" {
|
||||
t.Errorf("Expected 'hello world', got %s", res.Stdout)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunCommandWithPipe(t *testing.T) {
|
||||
// 测试包含管道的 RunCommand
|
||||
res, err := shell.RunCommand("echo hello world | grep hello", nil)
|
||||
if err != nil {
|
||||
t.Errorf("RunCommand with pipe failed: %v", err)
|
||||
}
|
||||
if strings.TrimSpace(string(res.Stdout)) != "hello world" {
|
||||
t.Errorf("Expected 'hello world', got %s", res.Stdout)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunCommandMixedPipeAndChain(t *testing.T) {
|
||||
// 测试 | 和 && 混合使用
|
||||
// 期望:(echo hello | grep h) && (echo world | grep w)
|
||||
res, err := shell.RunCommand("echo hello | grep h && echo world | grep w", nil)
|
||||
if err != nil {
|
||||
t.Errorf("RunCommand with mixed operators failed: %v", err)
|
||||
}
|
||||
output := strings.TrimSpace(string(res.Stdout))
|
||||
if !strings.Contains(output, "hello") || !strings.Contains(output, "world") {
|
||||
t.Errorf("Expected 'hello' and 'world' in output, got: %s", output)
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user