sc5 support resolves #240

[waggledans]

One-line summary

Upgrade to Sauce Connect 5. This is a breaking change.

Issue : #240

Description

Sauce Connect 5 is the latest and supported version of Sauce Connect. This update provides support for Sauce Connect 5, and removes support for Sauce Connect 4.x.x.

• Support Sauce Connect 5 command line options
• New API endpoint, scDownload for Sauce Connect 5 client download info
• Removed the old API endpoint, scVersions

Running Sauce Connect 5 client

# ./bin/sl sc --region us --tunnel-name node-saucelabs-test
2025/01/28 01:19:52.901099 [control] [INFO] Sauce Connect Proxy version=5.2.2
2025/01/28 01:19:52.901482 [control] [INFO] configuration
2025/01/28 01:19:52.901540 [proxy] [INFO] no upstream proxy specified
2025/01/28 01:19:52.901543 [proxy] [INFO] localhost proxying mode=deny
2025/01/28 01:19:52.901664 [control] [INFO] please wait for 'you may start your tests' to start your tests
2025/01/28 01:19:52.901666 [control] [INFO] provisioning Sauce Connect region=us-west name=node-saucelabs-test
...
2025/01/28 01:20:06.015227 [control] [INFO] Sauce Connect is up, you may start your tests

Calling scDownload API endpoint

# ./bin/sl scDownload --os linux --arch x86_64
{
    "download": {
        "checksums": [
            {
                "value": "2724245e9eff8eb81610a34f1d4c3f7b15dce67aa37a31d6b32dc888427982a5",
                "algorithm": "sha256"
            }
        ],
        "url": "https://saucelabs.com/downloads/sauce-connect/5.2.2/sauce-connect-5.2.2_linux.x86_64.tar.gz",
        "version": "5.2.2"
    }
}

Types of Changes

What types of changes does your code introduce? Keep the ones that apply:

• New feature (breaking change which adds functionality)

Review

List of tasks the reviewer must do to review the PR

• Tests
• Documentation

[budziam]

Please provide a an easy way to pass --metadata runner=XYZ. This will greatly help us identify the platform used to run an SC client. For reference, here's how it was implemented in the java library: https://github.com/saucelabs/ci-sauce/blob/main/src/main/java/com/saucelabs/ci/sauceconnect/SauceConnectManager.java#L364.