deno_git_cgi.ts

import {
  serve,
  ServerRequest,
} from "https://deno.land/[email protected]/http/server.ts";

const GIT_PROJECT_ROOT = "repoz";
const encoder = new TextEncoder();

async function gitCgi(request: ServerRequest) {
  let [path, query] = request.url.split("?");
  query = query || "";
  const contentType = request.headers.get("Content-Type") || "";

  const git = Deno.run({
    cmd: ["git", "http-backend", "--stateless-rpc", "--enable=receive-pack"],
    env: {
      GIT_HTTP_EXPORT_ALL: "true",
      GIT_PROJECT_ROOT,
      PATH_INFO: path,
      REQUEST_METHOD: request.method,
      QUERY_STRING: query,
      REMOTE_USER: "steve",
      CONTENT_TYPE: contentType,
    },
    stdin: "piped",
    stdout: "piped",
  });

  let wrote = 0;
  wrote = await Deno.copy(request.body, git.stdin);
  console.log("wrote to stdin", wrote);

  // https://github.com/denoland/deno/issues/7727#issuecomment-699698890
  // took me a while to sort that out
  git.stdin.close();

  wrote = await request.w.write(encoder.encode("HTTP/1.1 200 OK\r\n"));
  console.log("wrote header", wrote);

  wrote = await Deno.copy(git.stdout, request.w);
  console.log("copied from stdout", wrote);

  // send output to response
  await request.w.flush();
  console.log("flushed");

  // status
  const status = await git.status();
  console.log("status", status);

  git.close();
  request.conn.close();
}

const port = 4500;
const server = serve({ hostname: "0.0.0.0", port: 4500 });
console.log(
  `HTTP webserver running.  Access it at:  http://localhost:${port}/`
);

for await (const request of server) {
  await gitCgi(request);
}