message: [appveyor] Skip AppVeyor builds for boring files
  This list is not exhaustive (e.g., CONTRIBUTING.md is not included). To
  keep it maintainable, it only contains high-churn files that don't
  affect the build.
  * CHANGELOG.md doesn't affect the build but get changes almost daily.
  * Travis CI-specific files don't affect the Windows builds.
diff: version: 1.0.{build}
  clone_depth: 15
  + skip_commits:
  + files:
  + # These files are high-churn, but don't affect the build.
  + #
  + # NB: README.md is NOT in this list; the documentation build
  + # consumes it.
  + - CHANGELOG.md
  + # These files are only used by the Travis CI builds and don't affect
  + # the Windows builds.
  + - .travis.yml
  + - tools/image-builder/**
  +
  environment:
  global:
  STACK_ROOT: "c:\\sr"
  