TypeScriptToLua/src/cli/information.ts at project-references · TypeScriptToLua/TypeScriptToLua

32 lines (23 loc) · 1.06 KB

import { optionDeclarations } from "./parse";

export const { version } = require("../../package.json");
export const versionString = `Version ${version}`;

const helpString = `
Syntax:   tstl [options] [files...]

Examples: tstl path/to/file.ts [...]
          tstl -p path/to/tsconfig.json

In addition to the options listed below you can also pass options
for the typescript compiler (For a list of options use tsc -h).
Some tsc options might have no effect.
`.trim();

export function getHelpString(): string {
    let result = helpString + "\n\n";

    result += "Options:\n";
    for (const option of optionDeclarations) {
        const aliasStrings = (option.aliases ?? []).map(a => "-" + a);
        const optionString = [...aliasStrings, "--" + option.name].join("|");

        const valuesHint = option.type === "enum" ? option.choices.join("|") : option.type;
        const spacing = " ".repeat(Math.max(1, 45 - optionString.length - valuesHint.length));

        result += `\n ${optionString} <${valuesHint}>${spacing}${option.description}\n`;
    }

    return result;
}

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