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Codewalkers/coverage/src/preview/port-allocator.ts.html
Lukas May 34578d39c6 refactor: Restructure monorepo to apps/server/ and apps/web/ layout 
Move src/ → apps/server/ and packages/web/ → apps/web/ to adopt
standard monorepo conventions (apps/ for runnable apps, packages/
for reusable libraries). Update all config files, shared package
imports, test fixtures, and documentation to reflect new paths.

Key fixes:
- Update workspace config to ["apps/*", "packages/*"]
- Update tsconfig.json rootDir/include for apps/server/
- Add apps/web/** to vitest exclude list
- Update drizzle.config.ts schema path
- Fix ensure-schema.ts migration path detection (3 levels up in dev,
  2 levels up in dist)
- Fix tests/integration/cli-server.test.ts import paths
- Update packages/shared imports to apps/server/ paths
- Update all docs/ files with new paths
2026-03-03 11:22:53 +01:00

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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/**
* Port Allocator
*
* Finds the next available port for a preview deployment.
* Queries running preview containers and performs a bind test.
*/
&nbsp;
import { createServer } from 'node:net';
import { getPreviewPorts } from './docker-client.js';
import { createModuleLogger } from '../logger/index.js';
&nbsp;
const log = createModuleLogger('preview:port');
&nbsp;
/** Starting port for preview deployments */
const BASE_PORT = 9100;
&nbsp;
/** Maximum port to try before giving up */
const MAX_PORT = 9200;
&nbsp;
/**
* Allocate the next available port for a preview deployment.
*
* 1. Queries running preview containers for their cw.port labels
* 2. Finds the next port &gt;= BASE_PORT that isn't in use
* 3. Performs a bind test to verify no external conflict
*
* @returns An available port number
* @throws If no port is available in the range
*/
export async function allocatePort(): Promise&lt;number&gt; {
const usedPorts = new Set(await getPreviewPorts());
log.debug({ usedPorts: Array.from(usedPorts) }, 'ports in use by previews');
&nbsp;
for (let port = BASE_PORT; port &lt; MAX_PORT; port++) {
if (usedPorts.has(port)) continue;
&nbsp;
if (await isPortAvailable(port)) {
log.info({ port }, 'allocated port');
return port;
}
}
&nbsp;
<span class="cstat-no" title="statement not covered" > throw new Error(`No available ports in range ${BASE_PORT}-${MAX_PORT}`);</span>
}
&nbsp;
/**
* Test if a port is available by attempting to bind to it.
*/
async function isPortAvailable(port: number): Promise&lt;boolean&gt; {
return new Promise((resolve) =&gt; {
const server = createServer();
&nbsp;
server.once('error', () =&gt; {
resolve(false);
});
&nbsp;
server.listen(port, '127.0.0.1', () =&gt; {
server.close(() =&gt; {
resolve(true);
});
});
});
}
&nbsp;</pre></td></tr></table></pre>
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