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parse.ts
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import * as ts from "typescript";
import { BuildMode, CompilerOptions, LuaLibImportKind, LuaTarget } from "../CompilerOptions";
import * as cliDiagnostics from "./diagnostics";
export interface ParsedCommandLine extends ts.ParsedCommandLine {
options: CompilerOptions;
}
interface CommandLineOptionBase {
name: string;
aliases?: string[];
description: string;
}
interface CommandLineOptionOfEnum extends CommandLineOptionBase {
type: "enum";
choices: string[];
}
interface CommandLineOptionOfPrimitive extends CommandLineOptionBase {
type: "boolean" | "string" | "json-array-of-objects" | "array";
}
type CommandLineOption = CommandLineOptionOfEnum | CommandLineOptionOfPrimitive;
export const optionDeclarations: CommandLineOption[] = [
{
name: "buildMode",
description: "'default' or 'library'. Compiling as library will not resolve external dependencies.",
type: "enum",
choices: Object.values(BuildMode),
},
{
name: "extension",
description: 'File extension for the resulting Lua files. Defaults to ".lua"',
type: "string",
},
{
name: "luaBundle",
description: "The name of the lua file to bundle output lua to. Requires luaBundleEntry.",
type: "string",
},
{
name: "luaBundleEntry",
description: "The entry *.ts file that will be executed when entering the luaBundle. Requires luaBundle.",
type: "string",
},
{
name: "luaLibImport",
description: "Specifies how js standard features missing in lua are imported.",
type: "enum",
choices: Object.values(LuaLibImportKind),
},
{
name: "luaTarget",
aliases: ["lt"],
description: "Specify Lua target version.",
type: "enum",
choices: Object.values(LuaTarget),
},
{
name: "noImplicitGlobalVariables",
description:
'Specify to prevent implicitly turning "normal" variants into global variables in the transpiled output.',
type: "boolean",
},
{
name: "noImplicitSelf",
description: 'If "this" is implicitly considered an any type, do not generate a self parameter.',
type: "boolean",
},
{
name: "noHeader",
description: "Specify if a header will be added to compiled files.",
type: "boolean",
},
{
name: "sourceMapTraceback",
description: "Applies the source map to show source TS files and lines in error tracebacks.",
type: "boolean",
},
{
name: "luaPlugins",
description: "List of TypeScriptToLua plugins.",
type: "json-array-of-objects",
},
{
name: "tstlVerbose",
description: "Provide verbose output useful for diagnosing problems.",
type: "boolean",
},
{
name: "noResolvePaths",
description: "An array of paths that tstl should not resolve and keep as-is.",
type: "array",
},
{
name: "lua51AllowTryCatchInAsyncAwait",
description: "Always allow try/catch in async/await functions for Lua 5.1.",
type: "boolean",
},
];
export function updateParsedConfigFile(parsedConfigFile: ts.ParsedCommandLine): ParsedCommandLine {
let hasRootLevelOptions = false;
for (const [name, rawValue] of Object.entries(parsedConfigFile.raw)) {
const option = optionDeclarations.find(option => option.name === name);
if (!option) continue;
if (parsedConfigFile.raw.tstl === undefined) parsedConfigFile.raw.tstl = {};
parsedConfigFile.raw.tstl[name] = rawValue;
hasRootLevelOptions = true;
}
if (parsedConfigFile.raw.tstl) {
if (hasRootLevelOptions) {
parsedConfigFile.errors.push(cliDiagnostics.tstlOptionsAreMovingToTheTstlObject(parsedConfigFile.raw.tstl));
}
for (const [name, rawValue] of Object.entries(parsedConfigFile.raw.tstl)) {
const option = optionDeclarations.find(option => option.name === name);
if (!option) {
parsedConfigFile.errors.push(cliDiagnostics.unknownCompilerOption(name));
continue;
}
const { error, value } = readValue(option, rawValue, OptionSource.TsConfig);
if (error) parsedConfigFile.errors.push(error);
if (parsedConfigFile.options[name] === undefined) parsedConfigFile.options[name] = value;
}
}
return parsedConfigFile;
}
export function parseCommandLine(args: string[]): ParsedCommandLine {
return updateParsedCommandLine(ts.parseCommandLine(args), args);
}
function updateParsedCommandLine(parsedCommandLine: ts.ParsedCommandLine, args: string[]): ParsedCommandLine {
for (let i = 0; i < args.length; i++) {
if (!args[i].startsWith("-")) continue;
const isShorthand = !args[i].startsWith("--");
const argumentName = args[i].substr(isShorthand ? 1 : 2);
const option = optionDeclarations.find(option => {
if (option.name.toLowerCase() === argumentName.toLowerCase()) return true;
if (isShorthand && option.aliases) {
return option.aliases.some(a => a.toLowerCase() === argumentName.toLowerCase());
}
return false;
});
if (option) {
// Ignore errors caused by tstl specific compiler options
parsedCommandLine.errors = parsedCommandLine.errors.filter(
// TS5023: Unknown compiler option '{0}'.
// TS5025: Unknown compiler option '{0}'. Did you mean '{1}'?
e => !((e.code === 5023 || e.code === 5025) && String(e.messageText).includes(`'${args[i]}'.`))
);
const { error, value, consumed } = readCommandLineArgument(option, args[i + 1]);
if (error) parsedCommandLine.errors.push(error);
parsedCommandLine.options[option.name] = value;
if (consumed) {
// Values of custom options are parsed as a file name, exclude them
parsedCommandLine.fileNames = parsedCommandLine.fileNames.filter(f => f !== args[i + 1]);
i += 1;
}
}
}
return parsedCommandLine;
}
interface CommandLineArgument extends ReadValueResult {
consumed: boolean;
}
function readCommandLineArgument(option: CommandLineOption, value: any): CommandLineArgument {
if (option.type === "boolean") {
if (value === "true" || value === "false") {
value = value === "true";
} else {
// Set boolean arguments without supplied value to true
return { value: true, consumed: false };
}
}
if (value === undefined) {
return {
error: cliDiagnostics.compilerOptionExpectsAnArgument(option.name),
value: undefined,
consumed: false,
};
}
return { ...readValue(option, value, OptionSource.CommandLine), consumed: true };
}
enum OptionSource {
CommandLine,
TsConfig,
}
interface ReadValueResult {
error?: ts.Diagnostic;
value: any;
}
function readValue(option: CommandLineOption, value: unknown, source: OptionSource): ReadValueResult {
if (value === null) return { value };
switch (option.type) {
case "boolean":
case "string": {
if (typeof value !== option.type) {
return {
value: undefined,
error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
};
}
return { value };
}
case "array":
case "json-array-of-objects": {
const isInvalidNonCliValue = source === OptionSource.TsConfig && !Array.isArray(value);
const isInvalidCliValue = source === OptionSource.CommandLine && typeof value !== "string";
if (isInvalidNonCliValue || isInvalidCliValue) {
return {
value: undefined,
error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
};
}
const shouldParseValue = source === OptionSource.CommandLine && typeof value === "string";
if (!shouldParseValue) return { value };
if (option.type === "array") {
const array = value.split(",");
return { value: array };
}
try {
const objects = JSON.parse(value);
if (!Array.isArray(objects)) {
return {
value: undefined,
error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
};
}
return { value: objects };
} catch (e) {
if (!(e instanceof SyntaxError)) throw e;
return {
value: undefined,
error: cliDiagnostics.compilerOptionCouldNotParseJson(option.name, e.message),
};
}
}
case "enum": {
if (typeof value !== "string") {
return {
value: undefined,
error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, "string"),
};
}
const enumValue = option.choices.find(c => c.toLowerCase() === value.toLowerCase());
if (enumValue === undefined) {
const optionChoices = option.choices.join(", ");
return {
value: undefined,
error: cliDiagnostics.argumentForOptionMustBe(`--${option.name}`, optionChoices),
};
}
return { value: enumValue };
}
}
}