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