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MatusOllah committed Oct 4, 2024
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2 changes: 2 additions & 0 deletions .gitattributes
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# Auto detect text files and perform LF normalization
* text=auto
21 changes: 21 additions & 0 deletions .gitignore
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# If you prefer the allow list template instead of the deny list, see community template:
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
#
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib

# Test binary, built with `go test -c`
*.test

# Output of the go coverage tool, specifically when used with LiteIDE
*.out

# Dependency directories (remove the comment below to include it)
# vendor/

# Go workspace file
go.work
21 changes: 21 additions & 0 deletions LICENSE
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MIT License

Copyright (c) 2024 Matúš Ollah

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
24 changes: 24 additions & 0 deletions README.md
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# stripansi

**stripansi** is a Go package for removing [ANSI escape sequences](https://en.wikipedia.org/wiki/ANSI_escape_code).

## Basic Usage

```go
package main

import (
"fmt"
"os"

"github.com/MatusOllah/stripansi"
)

func main() {
s := "\x1b[38;5;140mhello\x1b[0m world"

fmt.Println(stripansi.String(s)) // "hello world"
fmt.Println(string(stripansi.Bytes([]byte(s)))) // "hello world"
stripansi.NewWriter(os.Stdout).Write([]byte(s)) // "hello world"
}
```
3 changes: 3 additions & 0 deletions go.mod
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module github.com/MatusOllah/stripansi

go 1.23.0
44 changes: 44 additions & 0 deletions stripansi.go
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// package stripansi provides utilities for removing ANSI escape sequences using regular expressions.
package stripansi

import (
"io"
"regexp"
"sync"
)

var re *regexp.Regexp = regexp.MustCompile("[\u001B\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[a-zA-Z\\d]*)*)?\u0007)|(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PRZcf-ntqry=><~]))")

// Regexp returns a copy of the underlying [regexp.Regexp].
func Regexp() *regexp.Regexp {
return re.Copy()
}

// Bytes removes ANSI escape sequences from the byte slice.
func Bytes(b []byte) []byte {
return re.ReplaceAll(b, nil)
}

// String removes ANSI escape sequences from the string.
func String(s string) string {
return re.ReplaceAllString(s, "")
}

// Writer wraps an [io.Writer] and removes ANSI sequences from its output.
type Writer struct {
w io.Writer
mu sync.Mutex
}

// NewWriter creates a new [Writer].
func NewWriter(w io.Writer) *Writer {
return &Writer{w: w}
}

// Write removes ANSI escape sequences and writes to the underlying writer.
func (w *Writer) Write(p []byte) (n int, err error) {
w.mu.Lock()
defer w.mu.Unlock()

return w.w.Write(Bytes(p))
}

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