import { isCommandBuilderCallback } from './command.js';
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import { assertNotStrictEqual } from './typings/common-types.js';
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import * as templates from './completion-templates.js';
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import { isPromise } from './utils/is-promise.js';
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import { parseCommand } from './parse-command.js';
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export function completion(yargs, usage, command, shim) {
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const self = {
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completionKey: 'get-yargs-completions',
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};
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let aliases;
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self.setParsed = function setParsed(parsed) {
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aliases = parsed.aliases;
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};
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const zshShell = (shim.getEnv('SHELL') && shim.getEnv('SHELL').indexOf('zsh') !== -1) ||
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(shim.getEnv('ZSH_NAME') && shim.getEnv('ZSH_NAME').indexOf('zsh') !== -1);
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self.getCompletion = function getCompletion(args, done) {
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const completions = [];
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const current = args.length ? args[args.length - 1] : '';
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const argv = yargs.parse(args, true);
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const parentCommands = yargs.getContext().commands;
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function runCompletionFunction(argv) {
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assertNotStrictEqual(completionFunction, null, shim);
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if (isSyncCompletionFunction(completionFunction)) {
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const result = completionFunction(current, argv);
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if (isPromise(result)) {
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return result
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.then(list => {
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shim.process.nextTick(() => {
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done(list);
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});
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})
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.catch(err => {
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shim.process.nextTick(() => {
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throw err;
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});
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});
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}
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return done(result);
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}
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else {
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return completionFunction(current, argv, completions => {
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done(completions);
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});
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}
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}
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if (completionFunction) {
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return isPromise(argv)
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? argv.then(runCompletionFunction)
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: runCompletionFunction(argv);
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}
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const handlers = command.getCommandHandlers();
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for (let i = 0, ii = args.length; i < ii; ++i) {
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if (handlers[args[i]] && handlers[args[i]].builder) {
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const builder = handlers[args[i]].builder;
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if (isCommandBuilderCallback(builder)) {
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const y = yargs.reset();
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builder(y);
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return y.argv;
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}
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}
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}
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if (!current.match(/^-/) &&
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parentCommands[parentCommands.length - 1] !== current) {
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usage.getCommands().forEach(usageCommand => {
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const commandName = parseCommand(usageCommand[0]).cmd;
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if (args.indexOf(commandName) === -1) {
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if (!zshShell) {
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completions.push(commandName);
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}
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else {
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const desc = usageCommand[1] || '';
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completions.push(commandName.replace(/:/g, '\\:') + ':' + desc);
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}
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}
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});
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}
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if (current.match(/^-/) || (current === '' && completions.length === 0)) {
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const descs = usage.getDescriptions();
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const options = yargs.getOptions();
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Object.keys(options.key).forEach(key => {
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const negable = !!options.configuration['boolean-negation'] &&
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options.boolean.includes(key);
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let keyAndAliases = [key].concat(aliases[key] || []);
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if (negable)
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keyAndAliases = keyAndAliases.concat(keyAndAliases.map(key => `no-${key}`));
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function completeOptionKey(key) {
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const notInArgs = keyAndAliases.every(val => args.indexOf(`--${val}`) === -1);
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if (notInArgs) {
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const startsByTwoDashes = (s) => /^--/.test(s);
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const isShortOption = (s) => /^[^0-9]$/.test(s);
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const dashes = !startsByTwoDashes(current) && isShortOption(key) ? '-' : '--';
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if (!zshShell) {
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completions.push(dashes + key);
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}
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else {
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const desc = descs[key] || '';
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completions.push(dashes +
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`${key.replace(/:/g, '\\:')}:${desc.replace('__yargsString__:', '')}`);
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}
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}
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}
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completeOptionKey(key);
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if (negable && !!options.default[key])
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completeOptionKey(`no-${key}`);
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});
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}
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done(completions);
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};
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self.generateCompletionScript = function generateCompletionScript($0, cmd) {
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let script = zshShell
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? templates.completionZshTemplate
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: templates.completionShTemplate;
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const name = shim.path.basename($0);
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if ($0.match(/\.js$/))
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$0 = `./${$0}`;
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script = script.replace(/{{app_name}}/g, name);
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script = script.replace(/{{completion_command}}/g, cmd);
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return script.replace(/{{app_path}}/g, $0);
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};
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let completionFunction = null;
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self.registerFunction = 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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function isSyncCompletionFunction(completionFunction) {
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return completionFunction.length < 3;
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}
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