diff options
Diffstat (limited to 'deps/node/deps/npm/node_modules/libnpmconfig/node_modules/p-locate/index.js')
-rw-r--r-- | deps/node/deps/npm/node_modules/libnpmconfig/node_modules/p-locate/index.js | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/deps/node/deps/npm/node_modules/libnpmconfig/node_modules/p-locate/index.js b/deps/node/deps/npm/node_modules/libnpmconfig/node_modules/p-locate/index.js new file mode 100644 index 00000000..4bd08aad --- /dev/null +++ b/deps/node/deps/npm/node_modules/libnpmconfig/node_modules/p-locate/index.js @@ -0,0 +1,34 @@ +'use strict'; +const pLimit = require('p-limit'); + +class EndError extends Error { + constructor(value) { + super(); + this.value = value; + } +} + +// The input can also be a promise, so we `Promise.resolve()` it +const testElement = (el, tester) => Promise.resolve(el).then(tester); + +// The input can also be a promise, so we `Promise.all()` them both +const finder = el => Promise.all(el).then(val => val[1] === true && Promise.reject(new EndError(val[0]))); + +module.exports = (iterable, tester, opts) => { + opts = Object.assign({ + concurrency: Infinity, + preserveOrder: true + }, opts); + + const limit = pLimit(opts.concurrency); + + // Start all the promises concurrently with optional limit + const items = [...iterable].map(el => [el, limit(testElement, el, tester)]); + + // Check the promises either serially or concurrently + const checkLimit = pLimit(opts.preserveOrder ? 1 : Infinity); + + return Promise.all(items.map(el => checkLimit(finder, el))) + .then(() => {}) + .catch(err => err instanceof EndError ? err.value : Promise.reject(err)); +}; |