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72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
var fs = require('fs'),
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path = require('path');
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// add bash completions to your
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// yargs-powered applications.
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module.exports = function (yargs, usage) {
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var self = {
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completionKey: 'get-yargs-completions'
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};
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// get a list of completion commands.
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self.getCompletion = function (done) {
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var completions = [],
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current = process.argv[process.argv.length - 1],
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previous = process.argv.slice(process.argv.indexOf('--' + self.completionKey) + 1),
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argv = yargs.parse(previous);
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// a custom completion function can be provided
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// to completion().
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if (completionFunction) {
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if (completionFunction.length < 3) {
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// synchronous completion function.
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return done(completionFunction(current, argv));
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} else {
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// asynchronous completion function
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return completionFunction(current, argv, function(completions) {
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done(completions);
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});
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}
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}
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if (!current.match(/^-/)) {
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usage.getCommands().forEach(function(command) {
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completions.push(command[0]);
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});
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}
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if (current.match(/^-/)) {
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Object.keys(yargs.getOptions().key).forEach(function(key) {
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completions.push('--' + key);
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});
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}
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done(completions);
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};
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// generate the completion script to add to your .bashrc.
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self.generateCompletionScript = function ($0) {
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var script = fs.readFileSync(
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path.resolve(__dirname, '../completion.sh.hbs'),
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'utf-8'
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),
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name = path.basename($0);
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// add ./to applications not yet installed as bin.
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if ($0.match(/\.js$/)) $0 = './' + $0;
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script = script.replace(/{{app_name}}/g, name);
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return script.replace(/{{app_path}}/g, $0);
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};
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// register a function to perform your own custom
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// completions., this function can be either
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// synchrnous or asynchronous.
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var completionFunction = null;
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self.registerFunction = function (fn) {
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completionFunction = fn;
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}
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return self;
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};
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