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Recursively find files in a directory using Bluebird promises
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| const Promise = require('bluebird') | |
| const fs = require('fs') | |
| Promise.promisifyAll(fs) | |
| const path = require('path') | |
| // Usage: | |
| // const findFiles = require('path/to/findFiles.js') | |
| // findFiles('dir/to/search/in') | |
| // Arg 'files' is used to propagate data of recursive calls to the initial call | |
| // If you really want to, you can use arg 'files' to manually add some files to the result | |
| // Note: Order of results is not guaranteed due to parallel nature of function | |
| findFiles = (dir, files = []) => { | |
| return fs.readdirAsync(dir) | |
| .then((items) => { // items = files || dirs | |
| // items figures as list of tasks, settled promise means task is completed | |
| return Promise.map(items, (item) => { | |
| item = path.resolve(dir, item) | |
| return fs.statAsync(item) | |
| .then((stat) => { | |
| if (stat.isFile()) { | |
| // item is file | |
| files.push(item) | |
| } else if (stat.isDirectory()) { | |
| // item is dir | |
| // note: we only care about this being a promise, not it's resolved value | |
| return findFiles(item, files) | |
| } | |
| }) | |
| }) | |
| }) | |
| .then(() => { | |
| // every task is completed, provide results | |
| return files | |
| }) | |
| } | |
| module.exports = findFiles |
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This is a good algorithm for limited trees (thank You!), but is pretty slow for extended file trees. Comments?