import { allErrors, bothFlag, empty, help, longFlag, oneOf, parse, parser, string, } from "@eeue56/baner"; import { writeFile } from "fs/promises"; import { install } from "./install"; import { fileExists } from "./utils"; type TemplateType = "web" | "html"; const validTemplates = [ "web", "html" ]; const templateParser = parser([ longFlag("path", "path of Derw file to create", string()), longFlag("template", "Template to use", oneOf(validTemplates)), bothFlag("h", "help", "This help text", empty()), ]); function showInfoHelp() { console.log("Generate a Derw file from a template."); console.log("Also installs required packages."); console.log(help(templateParser)); } async function copyWebTemplate(path: string): Promise { const template = ` import "../derw-packages/derw-lang/html/src/Html" exposing ( HtmlNode, RunningProgram, div, text, program, attribute, class_ ) type alias Model = { } initialModel: Model initialModel = { } type Msg = Noop update: Msg -> Model -> (Msg -> void) -> Model update msg model send = case msg of Noop -> model view: Model -> HtmlNode Msg view model = div [ ] [ ] [ text "Hello" ] root: any root = document.getElementById "root" main: RunningProgram Model Msg main = program { initialModel: initialModel, view: view, update: update, root: root } `.trim() + "\n"; if (await fileExists(path)) { console.log("Already a file!"); process.exit(1); } await writeFile(path, template); } async function copyHtmlTemplate(path: string): Promise { const template = `

`.trim() + "\n"; if (await fileExists(path)) { console.log("Already a file!"); process.exit(1); } await writeFile(path, template); } export async function template( isInPackageDirectory: boolean, argv: string[] ): Promise { const program = parse(templateParser, argv); if (program.flags["h/help"].isPresent) { showInfoHelp(); return; } const errors = allErrors(program); if (errors.length > 0) { console.log("Errors:"); console.log(errors.join("\n")); process.exit(1); } const path = program.flags.path.isPresent && program.flags.path.arguments.kind === "Ok" && (program.flags.path.arguments.value as string); const template = program.flags.template.isPresent && program.flags.template.arguments.kind === "Ok" && (program.flags.template.arguments.value as TemplateType); if (!path) { console.log("You must provide a path via --path"); return; } if (template === "web") { await copyWebTemplate(path); await install(isInPackageDirectory, [ "--name", "derw-lang/html", "--version", "main", ]); } else if (template === "html") { await copyHtmlTemplate(path); } else { console.log( `Template ${template} is unknown. Try one of: ${validTemplates.join( ", " )}` ); } }