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module Eval (
EvalInput(..),
EvalError(..), textEvalError,
Eval, runEval,
evalJob,
evalJobSet,
evalJobReference,
) where
import Control.Monad
import Control.Monad.Except
import Control.Monad.Reader
import Data.Bifunctor
import Data.List
import Data.Text (Text)
import Data.Text qualified as T
import Config
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
type Eval a = ReaderT EvalInput (ExceptT EvalError IO) a
runEval :: Eval a -> EvalInput -> IO (Either EvalError a)
runEval action einput = runExceptT $ flip runReaderT einput action
evalJob :: EvalInput -> DeclaredJob -> Except EvalError Job
evalJob EvalInput {..} decl = do
otherCheckout <- forM (jobOtherCheckout decl) $ \( DeclaredJobRepo name, revision, checkout ) -> do
repo <- maybe (throwError $ OtherEvalError $ "repo `" <> textRepoName name <> "' not defined") return $
lookup name eiOtherRepos
return ( EvaluatedJobRepo repo, revision, 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
canonicalJobName :: [ Text ] -> Config -> Eval [ JobIdPart ]
canonicalJobName (r : rs) config = do
einput <- ask
let name = JobName r
case find ((name ==) . jobName) (configJobs config) of
Just djob -> do
job <- either throwError return $ runExcept $ evalJob einput djob
let repos = nub $ map (\( EvaluatedJobRepo repo, _, _ ) -> repo) $ jobOtherCheckout job
(JobIdName name :) <$> canonicalOtherCheckouts rs repos
Nothing -> throwError $ OtherEvalError $ "job ‘" <> r <> "’ not found"
canonicalJobName [] _ = throwError $ OtherEvalError "expected job name"
canonicalOtherCheckouts :: [ Text ] -> [ Repo ] -> Eval [ JobIdPart ]
canonicalOtherCheckouts (r : rs) (repo : repos) = do
tree <- tryReadCommit repo r >>= \case
Just commit -> getCommitTree commit
Nothing -> tryReadTree repo r >>= \case
Just tree -> return tree
Nothing -> throwError $ OtherEvalError $ "failed to resolve ‘" <> r <> "’ to a commit or tree in " <> T.pack (show repo)
(JobIdTree (treeId tree) :) <$> canonicalOtherCheckouts rs repos
canonicalOtherCheckouts [] [] = return []
canonicalOtherCheckouts [] (_ : _ ) = throwError $ OtherEvalError $ "expected commit or tree reference"
canonicalOtherCheckouts (r : _) [] = throwError $ OtherEvalError $ "unexpected job ref part ‘" <> r <> "’"
canonicalCommitConfig :: [ Text ] -> Repo -> Eval [ JobIdPart ]
canonicalCommitConfig (r : rs) repo = do
tree <- tryReadCommit repo r >>= \case
Just commit -> getCommitTree commit
Nothing -> tryReadTree repo r >>= \case
Just tree -> return tree
Nothing -> throwError $ OtherEvalError $ "failed to resolve ‘" <> r <> "’ to a commit or tree in " <> T.pack (show repo)
config <- either fail return =<< loadConfigForCommit tree
(JobIdTree (treeId tree) :) <$> canonicalJobName rs config
canonicalCommitConfig [] _ = throwError $ OtherEvalError "expected commit or tree reference"
evalJobReference :: Config -> JobRef -> Eval JobId
evalJobReference config (JobRef rs) =
fmap JobId $ do
asks eiContainingRepo >>= \case
Just defRepo -> do
canonicalCommitConfig rs defRepo
Nothing -> do
canonicalJobName rs config
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