fix(client): parse unix socket urls

[raashish1601]

Summary

Adds unix:// URL parsing to RedisClient.parseURL, mapping the socket path into socket.path so callers can configure Unix domain socket connections through the same url option as TCP/TLS connections.

Supported forms include:

• unix:///tmp/redis.sock?db=2
• unix://user:secret@/tmp/redis.sock?db=3

The parser also preserves the existing async credentials provider behavior for URL credentials and validates malformed Unix socket authority/database values.

This PR also includes small typed cleanups in client/index.ts because npm run lint:changed lints the whole touched file and current master has pre-existing lint violations in that file.

Closes #2530.

Validation

• direct node -r ts-node/register/transpile-only checks for Unix socket path, db, credentials provider, and invalid authority
• npm run lint:changed
• npm run build
• git diff --check

I also attempted npx mocha --require ts-node/register/transpile-only packages/client/lib/client/index.spec.ts --grep unix://, but this repo starts its Docker-backed Redis test environment in global hooks before grep-selected tests run. It failed locally at spawn docker ENOENT because Docker is not installed in this environment.

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Note

Medium Risk
Moderate risk because it changes URL parsing and client option derivation, which can affect connection/auth configuration across callers; coverage is improved with new unit tests for unix URLs and invalid inputs.

Overview
Adds unix:// URL support to RedisClient.parseURL, allowing Unix domain socket connections via url by mapping the decoded socket path into socket.path and parsing db from the query string.

Refactors credential extraction into a shared helper so both TCP/TLS and Unix URLs produce username/password plus the async credentialsProvider, and adds validation for malformed Unix authority/path/database values.

Includes small TypeScript typing/lint cleanups around the client factory/proxy types, Multi construction, and invalidate push handler typing.

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Empty db query parameter silently maps to database 0

Low Severity

When the db query parameter is present but empty (e.g., unix:///tmp/redis.sock?db= or unix:///tmp/redis.sock?db), searchParams.get('db') returns '', which passes the !== null check. Number('') evaluates to 0 and isNaN(0) is false, so parsed.database is silently set to 0. Given the PR explicitly validates malformed database values (e.g., ?db=NaN), an empty value likely qualifies as malformed and probably warrants a similar TypeError rather than a silent default.

 

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