chore: retarget master branch refs to main (#5507)

Prepares for the master -> main release-branch rename:
- workflow triggers (pr, stb_tests, backend_tests, frontend_tests,
  documentation) now target main
- console-sync-release pipeline + secrets sample branch refs
- Chart.yaml icon raw URL (raw URLs do not redirect on rename)
- package.json climate script diff base
- .travis.yml branch allowlist (v2-master left as-is)
- docs: release_guide, contributing guides, developer-environment,
  devops_guide, cf-api-v2-usage, README license badge
- CONTRIBUTING.md: corrected stale claim that PRs target master
  (they target develop; main is the release branch)

Other projects' master URLs (helm, gimme, mo, mariadb, angular-cli,
monocular) and historical CHANGELOG entries are untouched.

Author: nabramovitz

.github/workflows/backend_tests.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - develop
-      - master
+      - main
     # tools/stb has its own gate (stb_tests.yml); skip the backend suite
     # for stb-only changes.
     paths-ignore:

.github/workflows/documentation.yml

@@ -2,9 +2,9 @@ name: documentation
 
 on:
   pull_request:
-    branches: [master]
+    branches: [main]
   push:
-    branches: [master]
+    branches: [main]
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: 'true'

.github/workflows/frontend_tests.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - develop
-      - master
+      - main
     # tools/stb has its own gate (stb_tests.yml); skip the frontend suite
     # for stb-only changes.
     paths-ignore:

.github/workflows/pr.yml

@@ -10,13 +10,13 @@ name: Pull Request Tests
 on:
   pull_request:
     branches:
-      - master
+      - main
       - develop
       - 'angular**'
   push:
     branches:
       - develop
-      - master
+      - main
 
 env:
   NODE_OPTIONS: --max-old-space-size=5500

.github/workflows/stb_tests.yml

@@ -16,13 +16,13 @@ name: STB Tests
 on:
   pull_request:
     branches:
-      - master
+      - main
       - develop
       - 'angular**'
   push:
     branches:
       - develop
-      - master
+      - main
     paths:
       - 'tools/stb/**'
 

.travis.yml

@@ -17,7 +17,7 @@ install:
 filter_secrets: false
 branches:
   only:
-    - master
+    - main
     - v2-master
     - e2e-tests
 cache:

CONTRIBUTING.md

@@ -35,7 +35,7 @@ To send your code change, use GitHub pull requests. The workflow is as follows:
 
   1. Fork the project.
 
-  1. Create a branch based on `master`.
+  1. Create a branch based on `develop`.
 
   1. Implement your change, including tests and documentation.
 
@@ -66,8 +66,8 @@ pointing to the number of the issue (e.g. "Fixes #123").
 
 ### Pull requests and branches
 
-All work happens in branches. The master branch is only used as the target for pull
-requests.
+All work happens in branches. The develop branch is the target for pull
+requests; releases are cut from main.
 
 During code review you often need to update pull requests. Usually you do that
 by pushing additional commits.

README.md

@@ -4,7 +4,7 @@
 <a href="https://goreportcard.com/report/github.com/cloudfoundry/stratos"><img src="https://goreportcard.com/badge/github.com/cloudfoundry-incubator/stratos"/></a>
 <a href="https://codecov.io/gh/cloudfoundry-community/stratos/branch/master"><img src="https://codecov.io/gh/cloudfoundry-community/stratos/branch/master/graph/badge.svg"/></a>
 [![GitHub release](https://img.shields.io/github/release/cloudfoundry-community/stratos.svg)](https://github.com/cloudfoundry/stratos/releases/latest)
-[![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/cloudfoundry/stratos/blob/master/LICENSE)
+[![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/cloudfoundry/stratos/blob/main/LICENSE)
 [![slack.cloudfoundry.org](https://slack.cloudfoundry.org/badge.svg)](https://cloudfoundry.slack.com/messages/C80EP4Y57/)
 
 # Roadmap

deploy/ci/console-sync-release.yml

@@ -8,7 +8,7 @@ resources:
 - name: helm-charts-repository
   type: git
   source:
-    branch: master
+    branch: main
     private_key: {{github-private-key}}
     uri: {{release-helm-repo}}
 jobs:

deploy/ci/secrets.yml-sample

@@ -1,6 +1,6 @@
 # Branches
-stratos-deploy-branch: master
-stratos-ui-branch: master
+stratos-deploy-branch: main
+stratos-ui-branch: main
 ui-pr-label: my-pr-label
 
 # Images