Cache improvements

  * Also support stack caching

  * Add `output.stack-root` in `action.yml`

  * Saving cache as a post-script

Author: omelkonian

setup/action.yml

@@ -25,7 +25,7 @@ inputs:
     description: 'If specified, enable-stack must be set. Will run stack setup to install the specified GHC'
   cache:
     required: false
-    description: 'If specified, automatically caches the cabal-related folders.'
+    description: 'If specified, automatically caches cabal/stack-related directories.'
 outputs:
   ghc-path:
     description: 'The path of the ghc executable _directory_'
@@ -35,6 +35,8 @@ outputs:
     description: 'The path of the stack executable _directory_'
   cabal-store:
     description: 'The path to the cabal store'
+  stack-root:
+    description: 'The path to the stack root'
   ghc-exe:
     description: 'The path of the ghc _executable_'
   cabal-exe:
@@ -44,3 +46,4 @@ outputs:
 runs:
   using: 'node12'
   main: 'dist/index.js'
+  post: 'dist/save-cache.js'

setup/dist/action.yml

@@ -25,7 +25,7 @@ inputs:
     description: 'If specified, enable-stack must be set. Will run stack setup to install the specified GHC'
   cache:
     required: false
-    description: 'If specified, automatically caches the cabal-related folders.'
+    description: 'If specified, automatically caches cabal/stack-related directories.'
 outputs:
   ghc-path:
     description: 'The path of the ghc executable _directory_'
@@ -35,6 +35,8 @@ outputs:
     description: 'The path of the stack executable _directory_'
   cabal-store:
     description: 'The path to the cabal store'
+  stack-root:
+    description: 'The path to the stack root'
   ghc-exe:
     description: 'The path of the ghc _executable_'
   cabal-exe:
@@ -44,3 +46,4 @@ outputs:
 runs:
   using: 'node12'
   main: 'dist/index.js'
+  post: 'dist/save-cache.js'