lex-github

GitHub integration for LegionIO. Provides runners for interacting with the GitHub REST API including repositories, issues, pull requests, labels, comments, commits, users, organizations, gists, search, Actions workflows, checks, releases, deployments, webhooks, and full GitHub App + OAuth authentication.

Installation

gem install lex-github

Authentication

Personal Access Token (PAT)

client = Legion::Extensions::Github::Client.new(token: 'ghp_your_token')

GitHub App (JWT + Installation Token)

# Set in Legion::Settings
# github.app.app_id: '12345'
# github.app.private_key_path: '/path/to/private-key.pem'
# github.app.installation_id: '67890'

client = Legion::Extensions::Github::Client.new
# Credentials resolved automatically from settings

Or via Vault:

vault write secret/github/app/app_id value='12345'
vault write secret/github/app/private_key value='-----BEGIN RSA PRIVATE KEY-----...'
vault write secret/github/app/installation_id value='67890'

OAuth Delegated (browser-based login)

# CLI login
legion lex exec github auth login

# Programmatic (using the CLI::Auth mixin)
auth = Object.new.extend(Legion::Extensions::Github::CLI::Auth)
result = auth.login(client_id: 'Iv1.abc', client_secret: 'secret')
# Opens browser → PKCE flow; token can be stored in Vault if Vault integration is configured

Credential Resolution Chain

lex-github resolves credentials automatically in priority order:

1. Vault OAuth delegated token
2. Settings OAuth access token
3. Vault GitHub App installation token (auto-generates on miss)
4. Settings GitHub App installation token
5. Vault PAT
6. Settings PAT (github.token)
7. gh CLI token (gh auth token)
8. GITHUB_TOKEN environment variable

Rate-limited credentials are skipped automatically. Scope-denied credentials (403) are skipped for the specific owner/repo and retried with the next source.

Standalone Usage

require 'legion/extensions/github'

client = Legion::Extensions::Github::Client.new(token: 'ghp_your_token')

# Repositories
client.list_repos(username: 'octocat')
client.get_repo(owner: 'octocat', repo: 'Hello-World')
client.create_repo(name: 'my-new-repo', private: true)

# Issues
client.list_issues(owner: 'octocat', repo: 'Hello-World')
client.create_issue(owner: 'octocat', repo: 'Hello-World', title: 'Bug report')

# Pull Requests
client.list_pull_requests(owner: 'octocat', repo: 'Hello-World')
client.create_pull_request(owner: 'octocat', repo: 'Hello-World', title: 'Fix', head: 'fix-branch', base: 'main')
client.merge_pull_request(owner: 'octocat', repo: 'Hello-World', pull_number: 42)

# GitHub Actions
client.list_workflows(owner: 'octocat', repo: 'Hello-World')
client.trigger_workflow(owner: 'octocat', repo: 'Hello-World', workflow_id: 'ci.yml', ref: 'main')
client.get_workflow_run(owner: 'octocat', repo: 'Hello-World', run_id: 12345)

# Check Runs (CI status)
client.create_check_run(owner: 'octocat', repo: 'Hello-World', name: 'CI', head_sha: 'abc123')
client.update_check_run(owner: 'octocat', repo: 'Hello-World', check_run_id: 1,
                        status: 'completed', conclusion: 'success')

# Releases
client.list_releases(owner: 'octocat', repo: 'Hello-World')
client.create_release(owner: 'octocat', repo: 'Hello-World', tag_name: 'v1.0.0')

# Deployments
client.create_deployment(owner: 'octocat', repo: 'Hello-World', ref: 'main', environment: 'production')
client.create_deployment_status(owner: 'octocat', repo: 'Hello-World', deployment_id: 1, state: 'success')

# Webhooks
client.list_webhooks(owner: 'octocat', repo: 'Hello-World')
client.create_webhook(owner: 'octocat', repo: 'Hello-World',
                      config: { url: 'https://example.com/webhook', content_type: 'json' })

# GitHub App
jwt_token = client.generate_jwt(app_id: '12345', private_key: File.read('private-key.pem'))
client.create_installation_token(jwt: jwt_token, installation_id: '67890')
client.list_installations(jwt: jwt_token)

# Webhook verification
client.verify_signature(payload: request.body.read, signature: request.env['HTTP_X_HUB_SIGNATURE_256'],
                        secret: 'webhook_secret')

Functions

Repositories

• list_repos, get_repo, create_repo, update_repo, delete_repo, list_branches, list_tags

Issues

• list_issues, get_issue, create_issue, update_issue, list_issue_comments, create_issue_comment

Pull Requests

• list_pull_requests, get_pull_request, create_pull_request, update_pull_request, merge_pull_request
• list_pull_request_commits, list_pull_request_files, list_pull_request_reviews, create_review

Labels

• list_labels, get_label, create_label, update_label, delete_label
• add_labels_to_issue, remove_label_from_issue

Comments

• list_comments, get_comment, create_comment, update_comment, delete_comment

Users

• get_authenticated_user, get_user, list_followers, list_following

Organizations

• list_user_orgs, get_org, list_org_repos, list_org_members

Gists

• list_gists, get_gist, create_gist, update_gist, delete_gist

Search

• search_repositories, search_issues, search_users, search_code

Commits

• list_commits, get_commit, compare_commits

Branches

• create_branch

Contents

• commit_files

GitHub Actions

• list_workflows, get_workflow, list_workflow_runs, get_workflow_run, trigger_workflow
• cancel_workflow_run, rerun_workflow, rerun_failed_jobs
• list_workflow_run_jobs, download_workflow_run_logs, list_workflow_run_artifacts

Checks

• create_check_run, update_check_run, get_check_run
• list_check_runs_for_ref, list_check_suites_for_ref, get_check_suite
• rerequest_check_suite, list_check_run_annotations

Releases

• list_releases, get_release, get_latest_release, get_release_by_tag
• create_release, update_release, delete_release
• list_release_assets, delete_release_asset

Deployments

• list_deployments, get_deployment, create_deployment, delete_deployment
• list_deployment_statuses, create_deployment_status, get_deployment_status

Repository Webhooks

• list_webhooks, get_webhook, create_webhook, update_webhook, delete_webhook
• ping_webhook, test_webhook, list_webhook_deliveries

GitHub App Auth

• generate_jwt, create_installation_token, list_installations, get_installation
• generate_manifest, exchange_manifest_code, manifest_url
• verify_signature, parse_event, receive_event

OAuth

• generate_pkce, authorize_url, exchange_code, refresh_token
• request_device_code, poll_device_code, revoke_token

Error Handling

begin
  client.get_repo(owner: 'org', repo: 'private-repo')
rescue Legion::Extensions::Github::RateLimitError => e
  puts "Rate limited, resets at: #{e.reset_at}"
rescue Legion::Extensions::Github::ScopeDeniedError => e
  puts "No credential authorized for #{e.owner}/#{e.repo}"
rescue Legion::Extensions::Github::AuthorizationError => e
  puts "All credentials exhausted: #{e.attempted_sources}"
end

Requirements

• Ruby >= 3.4
• LegionIO framework (optional for standalone client usage)
• faraday >= 2.0
• jwt ~> 2.7 (for GitHub App authentication)
• base64 >= 0.1 (for OAuth PKCE)

License

MIT