tra-analysis/website/functions/node_modules/yargs/lib/completion.js
2019-01-06 13:14:45 -06:00

92 lines
2.5 KiB
JavaScript

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