All: Use Lerna to manage monorepo

packages/app-cli/app/autocompletion.js

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+const { app } = require('./app.js');
+const Note = require('@joplinapp/lib/models/Note.js');
+const Folder = require('@joplinapp/lib/models/Folder.js');
+const Tag = require('@joplinapp/lib/models/Tag.js');
+const { cliUtils } = require('./cli-utils.js');
+const yargParser = require('yargs-parser');
+const fs = require('fs-extra');
+
+async function handleAutocompletionPromise(line) {
+	// Auto-complete the command name
+	const names = await app().commandNames();
+	const words = getArguments(line);
+	// If there is only one word and it is not already a command name then you
+	// should look for commands it could be
+	if (words.length == 1) {
+		if (names.indexOf(words[0]) === -1) {
+			const x = names.filter(n => n.indexOf(words[0]) === 0);
+			if (x.length === 1) {
+				return `${x[0]} `;
+			}
+			return x.length > 0 ? x.map(a => `${a} `) : line;
+		} else {
+			return line;
+		}
+	}
+	// There is more than one word and it is a command
+	const metadata = (await app().commandMetadata())[words[0]];
+	// If for some reason this command does not have any associated metadata
+	// just don't autocomplete. However, this should not happen.
+	if (metadata === undefined) {
+		return line;
+	}
+
+	if (words[0] === 'tag' && words[1] === 'notetags') {
+		metadata.usage = 'tag <tag-command> <note>';
+	}
+
+	// complete an option
+	const next = words.length > 1 ? words[words.length - 1] : '';
+	const l = [];
+	if (next[0] === '-') {
+		for (let i = 0; i < metadata.options.length; i++) {
+			const options = metadata.options[i][0].split(' ');
+			// if there are multiple options then they will be separated by comma and
+			// space. The comma should be removed
+			if (options[0][options[0].length - 1] === ',') {
+				options[0] = options[0].slice(0, -1);
+			}
+			if (words.includes(options[0]) || words.includes(options[1])) {
+				continue;
+			}
+			// First two elements are the flag and the third is the description
+			// Only autocomplete long
+			if (options.length > 1 && options[1].indexOf(next) === 0) {
+				l.push(options[1]);
+			} else if (options[0].indexOf(next) === 0) {
+				l.push(options[0]);
+			}
+		}
+		if (l.length === 0) {
+			return line;
+		}
+		const ret = l.map(a => toCommandLine(a));
+		ret.prefix = `${toCommandLine(words.slice(0, -1))} `;
+		return ret;
+	}
+	// Complete an argument
+	// Determine the number of positional arguments by counting the number of
+	// words that don't start with a - less one for the command name
+	const positionalArgs = words.filter(a => a.indexOf('-') !== 0).length - 1;
+
+	const cmdUsage = yargParser(metadata.usage)['_'];
+	cmdUsage.splice(0, 1);
+
+	if (cmdUsage.length >= positionalArgs) {
+		let argName = cmdUsage[positionalArgs - 1];
+		argName = cliUtils.parseCommandArg(argName).name;
+
+		const currentFolder = app().currentFolder();
+
+		if (argName == 'note' || argName == 'note-pattern') {
+			const notes = currentFolder ? await Note.previews(currentFolder.id, { titlePattern: `${next}*` }) : [];
+			l.push(...notes.map(n => n.title));
+		}
+
+		if (argName == 'notebook') {
+			const folders = await Folder.search({ titlePattern: `${next}*` });
+			l.push(...folders.map(n => n.title));
+		}
+
+		if (argName == 'item') {
+			const notes = currentFolder ? await Note.previews(currentFolder.id, { titlePattern: `${next}*` }) : [];
+			const folders = await Folder.search({ titlePattern: `${next}*` });
+			l.push(...notes.map(n => n.title), folders.map(n => n.title));
+		}
+
+		if (argName == 'tag') {
+			const tags = await Tag.search({ titlePattern: `${next}*` });
+			l.push(...tags.map(n => n.title));
+		}
+
+		if (argName == 'file') {
+			const files = await fs.readdir('.');
+			l.push(...files);
+		}
+
+		if (argName == 'tag-command') {
+			const c = filterList(['add', 'remove', 'list', 'notetags'], next);
+			l.push(...c);
+		}
+
+		if (argName == 'todo-command') {
+			const c = filterList(['toggle', 'clear'], next);
+			l.push(...c);
+		}
+	}
+	if (l.length === 1) {
+		return toCommandLine([...words.slice(0, -1), l[0]]);
+	} else if (l.length > 1) {
+		const ret = l.map(a => toCommandLine(a));
+		ret.prefix = `${toCommandLine(words.slice(0, -1))} `;
+		return ret;
+	}
+	return line;
+}
+function handleAutocompletion(str, callback) {
+	handleAutocompletionPromise(str).then(function(res) {
+		callback(undefined, res);
+	});
+}
+function toCommandLine(args) {
+	if (Array.isArray(args)) {
+		return args
+			.map(function(a) {
+				if (a.indexOf('"') !== -1 || a.indexOf(' ') !== -1) {
+					return `'${a}'`;
+				} else if (a.indexOf('\'') !== -1) {
+					return `"${a}"`;
+				} else {
+					return a;
+				}
+			})
+			.join(' ');
+	} else {
+		if (args.indexOf('"') !== -1 || args.indexOf(' ') !== -1) {
+			return `'${args}' `;
+		} else if (args.indexOf('\'') !== -1) {
+			return `"${args}" `;
+		} else {
+			return `${args} `;
+		}
+	}
+}
+function getArguments(line) {
+	let inSingleQuotes = false;
+	let inDoubleQuotes = false;
+	let currentWord = '';
+	const parsed = [];
+	for (let i = 0; i < line.length; i++) {
+		if (line[i] === '"') {
+			if (inDoubleQuotes) {
+				inDoubleQuotes = false;
+				// maybe push word to parsed?
+				// currentWord += '"';
+			} else {
+				inDoubleQuotes = true;
+				// currentWord += '"';
+			}
+		} else if (line[i] === '\'') {
+			if (inSingleQuotes) {
+				inSingleQuotes = false;
+				// maybe push word to parsed?
+				// currentWord += "'";
+			} else {
+				inSingleQuotes = true;
+				// currentWord += "'";
+			}
+		} else if (/\s/.test(line[i]) && !(inDoubleQuotes || inSingleQuotes)) {
+			if (currentWord !== '') {
+				parsed.push(currentWord);
+				currentWord = '';
+			}
+		} else {
+			currentWord += line[i];
+		}
+	}
+	if (!(inSingleQuotes || inDoubleQuotes) && /\s/.test(line[line.length - 1])) {
+		parsed.push('');
+	} else {
+		parsed.push(currentWord);
+	}
+	return parsed;
+}
+function filterList(list, next) {
+	const output = [];
+	for (let i = 0; i < list.length; i++) {
+		if (list[i].indexOf(next) !== 0) continue;
+		output.push(list[i]);
+	}
+	return output;
+}
+
+module.exports = { handleAutocompletion };