Evaluate repo definitions

1 files changed, 53 insertions, 0 deletions

diff --git a/src/Eval.hs b/src/Eval.hs
new file mode 100644
index 0000000..9130dd3
--- /dev/null
+++ b/src/Eval.hs
@@ -0,0 +1,53 @@
+module Eval (
+    EvalInput(..),
+    EvalError(..), textEvalError,
+
+    evalJob,
+    evalJobSet,
+) where
+
+import Control.Monad.Except
+
+import Data.Bifunctor
+import Data.Text (Text)
+import Data.Text qualified as T
+
+import Job.Types
+import Repo
+
+data EvalInput = EvalInput
+    { eiContainingRepo :: Maybe Repo
+    , eiOtherRepos :: [ ( RepoName, Repo ) ]
+    }
+
+data EvalError
+    = OtherEvalError Text
+
+textEvalError :: EvalError -> Text
+textEvalError (OtherEvalError text) = text
+
+evalJob :: EvalInput -> DeclaredJob -> Except EvalError Job
+evalJob EvalInput {..} decl = do
+    otherCheckout <- forM (jobOtherCheckout decl) $ \( DeclaredJobRepo name, checkout ) -> do
+        repo <- maybe (throwError $ OtherEvalError $ "repo `" <> textRepoName name <> "' not defined") return $
+            lookup name eiOtherRepos
+        return ( EvaluatedJobRepo repo, checkout )
+    return Job
+        { jobName = jobName decl
+        , jobContainingCheckout = jobContainingCheckout decl
+        , jobOtherCheckout = otherCheckout
+        , jobRecipe = jobRecipe decl
+        , jobArtifacts = jobArtifacts decl
+        , jobUses = jobUses decl
+        }
+
+evalJobSet :: EvalInput -> DeclaredJobSet -> JobSet
+evalJobSet ei decl = do
+    JobSet
+        { jobsetCommit = jobsetCommit decl
+        , jobsetJobsEither = join $
+            fmap (sequence . map (runExceptStr . evalJob ei)) $
+            jobsetJobsEither decl
+        }
+  where
+    runExceptStr = first (T.unpack . textEvalError) . runExcept