Fix Rails integration branch name

I'm not aware of the magic how `bundle install` worked when we pointed
to `rails`' `master` branch. `git fetch origin master` in Rails source
fails.

Author: pirj

.github/workflows/ci.yml

@@ -16,15 +16,15 @@ jobs:
       fail-fast: false
       matrix:
        include:
-         # Rails Master (7.0) builds >= 2.7
+         # Edge Rails (7.0) builds >= 2.7
          - ruby: 3.0
            allow_failure: true
            env:
-             RAILS_VERSION: 'master'
+             RAILS_VERSION: 'main'
          - ruby: 2.7
            allow_failure: true
            env:
-             RAILS_VERSION: 'master'
+             RAILS_VERSION: 'main'
 
          # Rails 6.1 builds >= 2.5
          - ruby: 3.0

.travis.yml

@@ -41,7 +41,7 @@ matrix:
     # Rails 6.1 builds >= 2.5
     - jdk: oraclejdk11
       env:
-        - RAILS_VERSION='master'
+        - RAILS_VERSION='main'
         - JRUBY_OPT=--dev
         - JAVA_OPTS="--add-opens java.base/sun.nio.ch=org.jruby.dist --add-opens java.base/java.io=org.jruby.dist --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.security=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.security.cert=ALL-UNNAMED --add-opens=java.base/java.util.zip=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.util.regex=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED  --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/javax.crypto=ALL-UNNAMED --add-opens=java.management/sun.management=ALL-UNNAMED"
 
@@ -64,6 +64,6 @@ matrix:
 
 branches:
   only:
-    - master
+    - main
     - /^\d+-\d+-maintenance$/
     - /^\d+-\d+-dev$/

Gemfile-rails-dependencies

@@ -1,7 +1,7 @@
 version_file = File.expand_path("../.rails-version", __FILE__)
 
 case version = ENV['RAILS_VERSION'] || (File.exist?(version_file) && File.read(version_file).chomp) || ''
-when /master/
+when /main/
   gem "rails", :git => "https://github.com/rails/rails.git"
   gem 'puma', "3.12.1"
   gem 'activerecord-jdbcsqlite3-adapter', git: 'https://github.com/jruby/activerecord-jdbc-adapter', platforms: [:jruby]

Gemfile-sqlite-dependencies

@@ -5,7 +5,7 @@ MAJOR =
   case RAILS_VERSION
   when /5-2-stable/
     5
-  when /master/, /stable/, nil, false, ''
+  when /main/, /stable/, nil, false, ''
     6
   else
     /(\d+)[\.|-]\d+/.match(RAILS_VERSION).captures.first.to_i

features/support/rails_versions.rb

@@ -1,6 +1,6 @@
 def rails_version
   string_version = ENV.fetch("RAILS_VERSION", "~> 6.0.0")
-  if string_version == "master" || string_version.nil?
+  if string_version == "main" || string_version.nil?
     Float::INFINITY
   else
     string_version[/\d[\.-]\d/].tr('-', '.')