derw/build/cli/repl.js

An Elm-inspired language that transpiles to TypeScript

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
    var m = o[Symbol.asyncIterator], i;
    return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.repl = void 0;
const promises_1 = require("fs/promises");
const process_1 = require("process");
const readline = __importStar(require("readline"));
const Ts_1 = require("../generators/Ts");
const parser_1 = require("../parser");
const Tokens_1 = require("../Tokens");
const types_1 = require("../types");
const utils_1 = require("./utils");
function exportEverything(module) {
    const exposing = [];
    for (const block of module.body) {
        switch (block.kind) {
            case "Const":
            case "Function": {
                exposing.push(block.name);
                break;
            }
            case "TypeAlias":
            case "UnionType": {
                exposing.push(block.type.name);
                break;
            }
        }
    }
    module.body.push((0, types_1.Export)(exposing));
    return module;
}
async function repl(isInPackageDirectory, argv) {
    var _a, e_1, _b, _c;
    let currentBuffer = [];
    function completer(text) {
        const tokens = (0, Tokens_1.tokenize)(currentBuffer.join("\n"));
        const identifiers = tokens.filter((token) => token.kind === "IdentifierToken");
        return [
            [
                ...new Set(identifiers.map((token) => token.body)),
            ],
            text,
        ];
    }
    const rl = readline.createInterface({
        input: process_1.stdin,
        output: process_1.stdout,
        completer,
        tabSize: 4,
    });
    rl.prompt();
    rl.on("close", () => { });
    let currentlyImportedModule = null;
    let module = null;
    await (0, utils_1.ensureDirectoryExists)("derw-packages/.cli/");
    async function run(currentBuffer) {
        var _a;
        module = (0, parser_1.parseWithContext)([...currentBuffer].join("\n"), "Main");
        module = exportEverything(module);
        const generated = (0, Ts_1.generateTypescript)((0, types_1.contextModuleToModule)(module));
        const fileTimestamp = new Date().getTime();
        const filename = `${process.cwd()}/derw-packages/.cli/${fileTimestamp}.ts`;
        await (0, promises_1.writeFile)(filename, generated);
        currentlyImportedModule = await (_a = filename, Promise.resolve().then(() => __importStar(require(_a))));
    }
    let linesAddedToCurrentBufferSinceLastParsing = [];
    try {
        for (var _d = true, rl_1 = __asyncValues(rl), rl_1_1; rl_1_1 = await rl_1.next(), _a = rl_1_1.done, !_a;) {
            _c = rl_1_1.value;
            _d = false;
            try {
                const line = _c;
                if (line.trim() === "") {
                    module = (0, parser_1.parseWithContext)([
                        ...currentBuffer,
                        "",
                        ...linesAddedToCurrentBufferSinceLastParsing,
                    ].join("\n"), "Main");
                    module = (0, parser_1.addTypeErrors)(module, []);
                    if (module.errors.length > 0) {
                        console.log(`Errors while parsing: ${module.errors.join("\n")}`);
                        linesAddedToCurrentBufferSinceLastParsing = [];
                    }
                    else {
                        for (const newLine of linesAddedToCurrentBufferSinceLastParsing) {
                            currentBuffer.push(newLine);
                        }
                        linesAddedToCurrentBufferSinceLastParsing = [];
                        currentBuffer.push("");
                        console.log("Parsed successfully");
                    }
                }
                else if (line.trim() === ":run") {
                    await run(currentBuffer);
                }
                else if (line.startsWith(":show")) {
                    const name = line.split(" ")[1].trim();
                    await run(currentBuffer);
                    1;
                    if (currentlyImportedModule[name] === undefined) {
                        console.log(`Couldn't find ${name} in current scope.`);
                    }
                    else {
                        console.log(currentlyImportedModule[name]);
                    }
                }
                else if (line.trim() === ":help") {
                    console.log("Enter some code, followed by a blank newline.");
                    console.log("Run the current namespace via :run");
                    console.log("And check the values of code via :show <name>");
                    console.log("Or evaluate a constant or function with :eval <function> <args>");
                }
                else if (line.startsWith(":eval")) {
                    const expression = `
_cli: any
_cli = ${line.split(" ").slice(1).join(" ")}
`;
                    module = (0, parser_1.parseWithContext)([...currentBuffer, "", expression].join("\n"), "Main");
                    module = exportEverything(module);
                    if (module.errors.length > 0) {
                        console.log(`Errors while parsing: ${module.errors.join("\n")}`);
                        continue;
                    }
                    else {
                        console.log("Parsed successfully");
                    }
                    const generated = (0, Ts_1.generateTypescript)((0, types_1.contextModuleToModule)(module));
                    const fileTimestamp = new Date().getTime();
                    const filename = `${process.cwd()}/derw-packages/.cli/${fileTimestamp}.ts`;
                    await (0, promises_1.writeFile)(filename, generated);
                    currentlyImportedModule = await (_a = filename, Promise.resolve().then(() => __importStar(require(_a))));
                    console.log(currentlyImportedModule["_cli"]);
                }
                else {
                    linesAddedToCurrentBufferSinceLastParsing.push(line.split("\t").join("    "));
                }
                rl.prompt();
            }
            finally {
                _d = true;
            }
        }
    }
    catch (e_1_1) { e_1 = { error: e_1_1 }; }
    finally {
        try {
            if (!_d && !_a && (_b = rl_1.return)) await _b.call(rl_1);
        }
        finally { if (e_1) throw e_1.error; }
    }
}
exports.repl = repl;