Switch active-branches source to S3 endpoint and simplify parsing

[Copilot]

Replace the GCS-hosted branches.json endpoint with the new release team S3 endpoint active-branches.txt, removing JSON parsing overhead in favor of a plain-text line-per-branch format.

elastic/active-branches

• Drop requests dependency entirely; use stdlib urllib.request
• Remove the pip install requests==2.31.0 action step
• Parse response as plain text (one branch per line) instead of payload.get('branches') from JSON

github/backport-active

• Update default backports-url to new S3 endpoint
• Replace get_config_from_url (returned JSON dict) with get_branches_from_url (returns list[str] directly)
• Update unit test mocks from response.json.return_value = {...} to response.text = 'branch1\nbranch2\n...'
• Update README to reflect new URL and plain-text format

Before:

req = requests.get('https://storage.googleapis.com/artifacts-api/snapshots/branches.json')
branches = req.json().get('branches')

After:

with urllib.request.urlopen('https://elastic-release-api.s3.us-west-2.amazonaws.com/public/active-branches.txt') as response:
    branches = [line.strip() for line in response.read().decode('utf-8').splitlines() if line.strip()]

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• elastic-release-api.s3.us-west-2.amazonaws.com
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)
  • Triggering command: /usr/bin/curl curl -v REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[v1v]

@copilot the CI failed with

Traceback (most recent call last):
  File "/home/runner/work/oblt-actions/oblt-actions/./elastic/active-branches/script.py", line 41, in <module>
    response = requests.get(branch_url, headers=headers)
               ^^^^^^^^
NameError: name 'requests' is not defined

[Copilot]

Pull request overview

This PR migrates the “active branches” source from the legacy GCS JSON endpoint to a new release-team S3 plain-text endpoint, simplifying branch parsing and updating consumers accordingly.

Changes:

• Update github/backport-active to default to the new S3 active-branches.txt endpoint and parse branches as plain text lines.
• Update elastic/active-branches to fetch branches via urllib.request and remove the requests install step.
• Adjust unit tests and README docs to reflect the new plain-text format and default URL.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
github/backport-active/test_backport_script.py	Updates mocks to provide branch lists via response.text (line-per-branch) instead of JSON.
github/backport-active/README.md	Updates inputs/docs to describe the new plain-text active-branches endpoint.
github/backport-active/backport_script.py	Replaces JSON config fetching with plain-text branch list parsing.
github/backport-active/action.yml	Updates the default backports-url to the new S3 endpoint.
elastic/active-branches/script.py	Switches branch fetching to urllib.request and parses branches from plain text.
elastic/active-branches/action.yml	Removes the step that installed requests.

[Copilot]

@copilot the CI failed with

...

Fixed in 1edca44; elastic/active-branches now uses urllib for the GitHub branch checks as well, so the workflow no longer depends on requests.

[fr4nc1sc0-r4m0n]

LGTM