Don't run swig on CI

Author: robinst

.github/workflows/ci.yml

@@ -11,6 +11,7 @@ jobs:
     env:
       PLATFORM: x86_64-linux
       TAGLIB_VERSION: 1.11.1
+      SKIP_SWIG: true
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-ruby@v1

Rakefile

@@ -33,6 +33,6 @@ import 'tasks/gemspec_check.rake'
 # by Swig. Since the ExtensionTasks depend on the *_wrap.cxx files,
 # compiling the extensions will trigger Swig, which is not desired as
 # those files have already been generated and there's no reason to make
-# Swig a variable of the CI. To prevent those dependencies, do not import
-# swig.rake when running in Travis.
-import 'tasks/swig.rake' unless ENV['TRAVIS'] == 'true'
+# Swig a variable of the CI. The environment variable can be set to
+# prevent running swig.
+import 'tasks/swig.rake' unless ENV['SKIP_SWIG'] == 'true'