magic-nix-cache-action/dist/index.js.map

{"version":3,"sources":["../src/index.ts"],"sourcesContent":["import * as fs from \"node:fs/promises\";\nimport * as os from \"node:os\";\nimport * as path from \"node:path\";\nimport { spawn, exec, SpawnOptions } from \"node:child_process\";\nimport { openSync, readFileSync } from \"node:fs\";\nimport { inspect, promisify } from \"node:util\";\nimport * as http from \"http\";\n\nimport * as core from \"@actions/core\";\nimport { Tail } from \"tail\";\nimport got from \"got\";\nimport { IdsToolbox } from \"detsys-ts\";\n\nconst ENV_CACHE_DAEMONDIR = \"MAGIC_NIX_CACHE_DAEMONDIR\";\n\nconst gotClient = got.extend({\n  retry: {\n    limit: 1,\n    methods: [\"POST\", \"GET\", \"PUT\", \"HEAD\", \"DELETE\", \"OPTIONS\", \"TRACE\"],\n  },\n  hooks: {\n    beforeRetry: [\n      (error, retryCount) => {\n        core.info(`Retrying after error ${error.code}, retry #: ${retryCount}`);\n      },\n    ],\n  },\n});\n\nasync function fetchAutoCacher(toolbox: IdsToolbox): Promise<string> {\n  const closurePath = await toolbox.fetch();\n  toolbox.recordEvent(\"load_closure\");\n  const { stdout } = await promisify(exec)(\n    `cat \"${closurePath}\" | xz -d | nix-store --import`,\n  );\n\n  const paths = stdout.split(os.EOL);\n  // Since the export is in reverse topologically sorted order, magic-nix-cache is always the penultimate entry in the list (the empty string left by split being the last).\n  const last_path = paths.at(-2);\n  return `${last_path}/bin/magic-nix-cache`;\n}\n\nfunction tailLog(daemonDir: string): Tail {\n  const log = new Tail(path.join(daemonDir, \"daemon.log\"));\n  core.debug(`tailing daemon.log...`);\n  log.on(\"line\", (line) => {\n    core.info(line);\n  });\n  return log;\n}\n\nasync function setUpAutoCache(toolbox: IdsToolbox): Promise<void> {\n  const tmpdir = process.env[\"RUNNER_TEMP\"] || os.tmpdir();\n  const required_env = [\n    \"ACTIONS_CACHE_URL\",\n    \"ACTIONS_RUNTIME_URL\",\n    \"ACTIONS_RUNTIME_TOKEN\",\n  ];\n\n  let anyMissing = false;\n  for (const n of required_env) {\n    if (!process.env.hasOwnProperty(n)) {\n      anyMissing = true;\n      core.warning(\n        `Disabling automatic caching since required environment ${n} isn't available`,\n      );\n    }\n  }\n\n  if (anyMissing) {\n    return;\n  }\n\n  core.debug(`GitHub Action Cache URL: ${process.env[\"ACTIONS_CACHE_URL\"]}`);\n\n  const daemonDir = await fs.mkdtemp(path.join(tmpdir, \"magic-nix-cache-\"));\n\n  let daemonBin: string;\n  if (core.getInput(\"source-binary\")) {\n    daemonBin = core.getInput(\"source-binary\");\n  } else {\n    daemonBin = await fetchAutoCacher(toolbox);\n  }\n\n  let runEnv;\n  if (core.isDebug()) {\n    runEnv = {\n      RUST_LOG: \"trace,magic_nix_cache=debug,gha_cache=debug\",\n      RUST_BACKTRACE: \"full\",\n      ...process.env,\n    };\n  } else {\n    runEnv = process.env;\n  }\n\n  const notifyPort = core.getInput(\"startup-notification-port\");\n\n  const notifyPromise = new Promise<Promise<void>>((resolveListening) => {\n    const promise = new Promise<void>(async (resolveQuit) => {\n      const notifyServer = http.createServer((req, res) => {\n        if (req.method === \"POST\" && req.url === \"/\") {\n          core.debug(`Notify server shutting down.`);\n          res.writeHead(200, { \"Content-Type\": \"application/json\" });\n          res.end(\"{}\");\n          notifyServer.close(() => {\n            resolveQuit();\n          });\n        }\n      });\n\n      notifyServer.listen(notifyPort, () => {\n        core.debug(`Notify server running.`);\n        resolveListening(promise);\n      });\n    });\n  });\n\n  // Start tailing the daemon log.\n  const outputPath = `${daemonDir}/daemon.log`;\n  const output = openSync(outputPath, \"a\");\n  const log = tailLog(daemonDir);\n  const netrc = await netrcPath();\n  const nixConfPath = `${process.env[\"HOME\"]}/.config/nix/nix.conf`;\n\n  const daemonCliFlags: string[] = [\n    \"--startup-notification-url\",\n    `http://127.0.0.1:${notifyPort}`,\n    \"--listen\",\n    core.getInput(\"listen\"),\n    \"--upstream\",\n    core