Allow configuration overrides in examples directory

Author: ianfixes

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - `CIConfig.available_override_config_path()` to search for available override files in standard locations
 - `CIConfig.override_file_from_project_library` and `CIConfig.override_file_from_example` to expose config locations
 - CI runner script now expliclty informs about config overrides
+- A project `examples/` directory can now provide its own configuration override file, which provides no new flexibility but simply mirrors the behavior for `tests/`.
 
 ### Changed
 - `CIConfig` now uses `Pathname` instead of strings

SampleProjects/TestSomething/examples/.arduino-ci.yml

@@ -0,0 +1,4 @@
+compile:
+  platforms:
+    - uno
+    - due

SampleProjects/TestSomething/examples/TestSomethingExample/.arduino-ci.yml

@@ -0,0 +1,4 @@
+compile:
+  platforms:
+    - uno
+    - due

exe/arduino_ci.rb

@@ -488,13 +488,16 @@ def perform_example_compilation_tests(cpp_library, config)
     return
   end
 
+  inform("Using configuration override from examples") { config.override_file_from_example(cpp_library.examples_dir) }
+  ex_config = config.from_example(cpp_library.examples_dir)
+
   library_examples.each do |example_path|
     example_name = File.basename(example_path)
     puts
     inform("Discovered example sketch") { example_name }
 
-    inform("Using configuration override from example") { config.override_file_from_example(example_path) }
-    ovr_config = config.from_example(example_path)
+    inform("Using configuration override from example") { ex_config.override_file_from_example(example_path) }
+    ovr_config = ex_config.from_example(example_path)
 
     platforms = choose_platform_set(ovr_config, "library example", ovr_config.platforms_to_build, cpp_library.library_properties)