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import type { Protocol, Type } from "../src/protocol/schema";
import { writeFileSync } from "node:fs";
import { spawnSync } from "node:child_process";
run().catch(console.error);
async function run() {
const cwd = new URL("../src/protocol/", import.meta.url);
const runner = "Bun" in globalThis ? "bunx" : "npx";
const write = (name: string, data: string) => {
const path = new URL(name, cwd);
writeFileSync(path, data);
spawnSync(runner, ["prettier", "--write", path.pathname], { cwd, stdio: "ignore" });
};
const schema: Protocol = await download(
"https://microsoft.github.io/debug-adapter-protocol/debugAdapterProtocol.json",
);
write("protocol.json", JSON.stringify(schema));
const types = formatProtocol(schema);
write("index.d.ts", `// GENERATED - DO NOT EDIT\n${types}`);
}
function formatProtocol(protocol: Protocol, extraTs?: string): string {
const { definitions } = protocol;
const requestMap = new Map();
const responseMap = new Map();
const eventMap = new Map();
let body = `export namespace DAP {`;
loop: for (const [key, definition] of Object.entries(definitions)) {
if (/[a-z]+Request$/i.test(key)) {
continue;
}
if (/[a-z]+Arguments$/i.test(key)) {
const name = key.replace(/(Request)?Arguments$/, "");
const requestName = `${name}Request`;
requestMap.set(toMethod(name), requestName);
body += formatType(definition, requestName);
continue;
}
if ("allOf" in definition) {
const { allOf } = definition;
for (const type of allOf) {
if (type.type !== "object") {
continue;
}
const { description, properties = {} } = type;
if (/[a-z]+Event$/i.test(key)) {
const { event, body: type = {} } = properties;
if (!event || !("enum" in event)) {
continue;
}
const [eventKey] = event.enum ?? [];
eventMap.set(eventKey, key);
const eventType: Type = {
type: "object",
description,
...type,
};
body += formatType(eventType, key);
continue loop;
}
if (/[a-z]+Response$/i.test(key)) {
const { body: type = {} } = properties;
const bodyType: Type = {
type: "object",
description,
...type,
};
const name = key.replace(/Response$/, "");
responseMap.set(toMethod(name), key);
body += formatType(bodyType, key);
continue loop;
}
}
}
body += formatType(definition, key);
}
for (const [key, name] of responseMap) {
if (requestMap.has(key)) {
continue;
}
const requestName = `${name.replace(/Response$/, "")}Request`;
requestMap.set(key, requestName);
body += formatType({ type: "object", properties: {} }, requestName);
}
body += formatMapType("RequestMap", requestMap);
body += formatMapType("ResponseMap", responseMap);
body += formatMapType("EventMap", eventMap);
if (extraTs) {
body += extraTs;
}
return body + "};";
}
function formatMapType(key: string, typeMap: Map<string, string>): string {
const type: Type = {
type: "object",
required: [...typeMap.keys()],
properties: Object.fromEntries([...typeMap.entries()].map(([key, value]) => [key, { $ref: value }])),
};
return formatType(type, key);
}
function formatType(type: Type, key?: string): string {
const { description, type: kind } = type;
let body = "";
if (key) {
if (description) {
body += `\n${toComment(description)}\n`;
}
body += `export type ${key}=`;
}
if (kind === "boolean") {
body += "boolean";
} else if (kind === "number" || kind === "integer") {
body += "number";
} else if (kind === "string") {
const { enum: choices } = type;
if (choices) {
body += choices.map(value => `"${value}"`).join("|");
} else {
body += "string";
}
} else if (kind === "array") {
const { items } = type;
const itemType = items ? formatType(items) : "unknown";
body += `${itemType}[]`;
} else if (kind === "object") {
const { properties, required } = type;
if (!properties || Object.keys(properties).length === 0) {
body += "{}";
} else {
body += "{";
for (const [key, { description, ...type }] of Object.entries(properties)) {
if (description) {
body += `\n${toComment(description)}`;
}
const delimit = required?.includes(key) ? ":" : "?:";
body += `\n${key}${delimit}${formatType(type)};`;
}
body += "}";
}
} else if ("$ref" in type) {
const { $ref: ref } = type;
body += ref.split("/").pop() || "unknown";
} else if ("allOf" in type) {
const { allOf } = type;
body += allOf.map(type => formatType(type)).join("&");
} else {
body += "unknown";
}
if (key) {
body += ";";
}
return body;
}
function toMethod(name: string): string {
return `${name.substring(0, 1).toLowerCase()}${name.substring(1)}`;
}
function toComment(description?: string): string {
if (!description) {
return "";
}
const lines = ["/**", ...description.split("\n").map(line => ` * ${line.trim()}`), "*/"];
return lines.join("\n");
}
async function download<T>(url: string | URL): Promise<T> {
const response = await fetch(url);
if (!response.ok) {
throw new Error(`Failed to download ${url}: ${response.statusText}`);
}
return response.json();
}
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