initial cut, only run jobs for modified packages

mono_repo.yaml

@@ -6,6 +6,8 @@ coverage_service:
 - coveralls
 - codecov
 
+smart_jobs: true
+
 github:
   # Setting just `cron` keeps the defaults for `push` and `pull_request`
   cron: '0 0 * * 0' # “At 00:00 (UTC) on Sunday.”

mono_repo/lib/src/ci_shared.dart

@@ -32,6 +32,7 @@ String get createdWith => '# Created with package:mono_repo v$_pkgVersion';
 
 String get _pkgVersion => _isTesting ? '1.2.3' : packageVersion;
 
+const calculateChangesJobName = 'Calculating affected packages';
 const selfValidateJobName = 'mono_repo self validate';
 
 final selfValidateCommands = [

mono_repo/lib/src/commands/github/action_info.dart

@@ -38,6 +38,13 @@ enum ActionInfo implements Comparable<ActionInfo> {
     name: 'Upload coverage to codecov.io',
     repo: 'codecov/codecov-action',
     version: codecovCodecovActionVersion,
+  ),
+
+  /// See https://github.com/marketplace/actions/paths-changes-filter
+  pathsFilter(
+    name: 'Produce variables based on which packages are affected',
+    repo: 'dorny/paths-filter',
+    version: dornyPathsFilterVersion,
   );
 
   const ActionInfo({

mono_repo/lib/src/commands/github/action_versions.dart

@@ -12,3 +12,4 @@ const actionsCheckoutVersion = '8e5e7e5ab8b370d6c329ec480221332ada57f0ab';
 const subositoFlutterActionVersion = '48cafc24713cca54bbe03cdc3a423187d413aafa';
 const coverallsappGithubActionVersion = 'master';
 const codecovCodecovActionVersion = 'main';
+const dornyPathsFilterVersion = 'v2';