50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
import { promisify } from 'util'
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import path from 'path'
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import { readFile, writeFile } from 'fs'
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const read = promisify(readFile)
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const write = promisify(writeFile)
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import settle from 'p-settle'
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import logger from '@uci-utils/logger'
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let log = logger({ package:'@uci-utils/read-lines', file:'src/read-lines.js'})
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// read lines from one or more files
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function readLines (files=[],dir) {
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log.debug({files:files,dir:dir,msg:'additional files'})
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let list = []
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if (!Array.isArray(files)) files=[files]
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// each set in an the array is new line delimited set of ignore patterns
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// settle returns array of error,value pairs
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return settle(files.map(file => {
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// console.log('directory',path.dirname(file))
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if (path.dirname(file)==='.') file = dir+'/'+file
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log.debug({function:'readLines',file:file,msg:'reading a file of lines into array'})
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return read(file)
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}))
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.then((sets) => {
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sets.forEach( set => {
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if (set.isFulfilled) list.push(...set.value.toString().match(/.+/g))
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else log.warn({function:'readLines', error:set.reason, msg:' was unable to read file'})
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})
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return Promise.resolve(list)
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})
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.catch((err) => {
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// only returned when something horrible is wrong
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return Promise.reject(err)
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})
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}
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// an ignore list should not be huge so can serailize at once
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function writeLines (filePath,list) {
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return write(filePath,list.join('\n'))
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.then(() => {
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log.info({function:'writeLines', file:filePath, msg:'wrote array to file of lines'})
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})
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.catch( err => {
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log.fatal({function:'writeLines', error:err, msg:'unable to write array to file of lines'})
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})
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}
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export default readLines
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export { readLines, writeLines }
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