56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
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'use strict';
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var assert = require('assert');
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var levenshtein = require('fast-levenshtein');
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function normalizeArgs(registry, args) {
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function getFunction(task) {
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if (typeof task === 'function') {
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return task;
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}
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var fn = registry.get(task);
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if (!fn) {
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var similar = similarTasks(registry, task);
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var err;
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if (similar.length > 0) {
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err = new Error('Task never defined: ' + task + ' - did you mean? ' + similar.join(', '));
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err.task = task;
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err.similar = similar;
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} else {
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err = new Error('Task never defined: ' + task);
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err.task = task;
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}
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throw err;
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}
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return fn;
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}
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var flattenArgs = Array.prototype.concat.apply([], args);
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assert(flattenArgs.length, 'One or more tasks should be combined using series or parallel');
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return flattenArgs.map(getFunction);
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}
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function similarTasks(registry, queryTask) {
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if (typeof queryTask !== 'string') {
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return [];
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}
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var tasks = registry.tasks();
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var similarTasks = [];
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for (var task in tasks) {
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if (Object.prototype.hasOwnProperty.call(tasks, task)) {
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var distance = levenshtein.get(task, queryTask);
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var allowedDistance = Math.floor(0.4 * task.length) + 1;
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if (distance < allowedDistance) {
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similarTasks.push(task);
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}
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}
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}
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return similarTasks;
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}
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module.exports = normalizeArgs;
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