https://github.com/maru44/catcher-in-the-cli

https://github.com/maru44/catcher-in-the-cli

Last synced: 5 days ago
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• Host: GitHub
• URL: https://github.com/maru44/catcher-in-the-cli
• Owner: maru44
• License: mit
• Created: 2021-11-15T11:40:52.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2021-11-24T06:02:47.000Z (about 3 years ago)
• Last Synced: 2024-06-21T18:03:30.333Z (7 months ago)
• Language: Go
• Size: 29.3 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# The Catcher in the Cli

> *I'm standing on the edge of some crazy cliff. What I have to do, I have to catch everybody if they start to go over the cliff—I mean if they’re running and they don’t look where they’re going I have to come out from somewhere and catch them. That’s all I’d do all day. I’d just be the catcher in the cli and all.*

ref: *The Catcher in the Rye*

## Explain

You can catch `Stdout`, `Stdin` and `Stderr` by using this package.

## Usage

I'll show you usage and that result.

### usage

```go:main.go

package main

import (

	"context"

	"fmt"

	"os"

	"time"

	"github.com/maru44/catcher-in-the-cli"

)

func main() {

	ctx := context.Background()

	c := catcher.GenerateCatcher(

		&catcher.Settings{

			Interval: 4000,

			Repeat:   catcher.IntPtr(2),

		},

	)

	go func() {

		select {

		case <-time.After(500 * time.Millisecond):

			fmt.Println("bbb")

			fmt.Println("ccc")

			fmt.Fprintln(os.Stderr, "ddddd")

		}

	}()

	c.CatchWithCtx(ctx, writeFile)

}

func writeFile(ts []*catcher.Caught) {

	f, _ := os.OpenFile("./_sample/log.log", os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0600)

	defer f.Close()

	for _, t := range ts {

		f.Write([]byte(t.String() + "\n"))

	}

}

```

### result

I ran `go run _sample/main.go` from `/catcher-in-the-cli`.


And also I ran following commands `aaa` and `ls` under main func is running.

**output**

```

aaa

ddddd

exec: "aaa": executable file not found in $PATH

bbb

ccc

ls

LICENSE

README.md

_sample

_sample2

catcher.go

caught.go

domain.go

go.mod

tools.go

```

**log.log**

```log.log

Output: bbb

Output: ccc

Input: aaa

Error: ddddd

Error: exec: "aaa": executable file not found in $PATH

Output: LICENSE

Output: README.md

Output: _sample

Output: _sample2

Output: catcher.go

Output: caught.go

Output: domain.go

Output: go.mod

Output: tools.go

Input: ls

```