just a file
That's all folks!
Created
June 15, 2018 16:20
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Sends content before and after another stream
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| const fs = require('fs'); | |
| const wrapStream = require('./wrap-stream'); | |
| fs.createReadStream('some-file.txt') // file contents: 'just a file' | |
| .pipe(wrapStream('## Below you will find the contents of some-file.txt:\n\n```\n', '\n```\n\nThat\'s all folks!') | |
| .pipe('output.md') | |
| ; |
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| function wrapStream(prefix, suffix) { | |
| let once = false; | |
| return new Transform({ | |
| objectMode: true, | |
| transform(chunk, _, callback) { | |
| if (!once) { | |
| once = true; | |
| callback(null, `${prefix}${chunk}`); | |
| } | |
| else { | |
| callback(null, chunk); | |
| } | |
| }, | |
| flush(callback) { | |
| callback(null, suffix); | |
| } | |
| }); | |
| } | |
| module.exports = wrapStream; |
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