Desugar local build tools to build-tool-depends (fixes #516)

src/Hpack/Config.hs

@@ -983,7 +983,7 @@ data Executable = Executable {
 , executableGeneratedModules :: [Module]
 } deriving (Eq, Show)
 
-data BuildTool = BuildTool String String | LocalBuildTool String
+data BuildTool = BuildTool String String
   deriving (Show, Eq, Ord)
 
 data Section a = Section {
@@ -1517,14 +1517,11 @@ toSection packageName_ executableNames = go
 
 type SystemBuildTool = (String, VersionConstraint)
 
-toBuildTool :: Monad m => String -> [String] -> (ParseBuildTool, DependencyVersion)
-  -> Warnings m (Either SystemBuildTool (BuildTool, DependencyVersion))
+toBuildTool :: Monad m => String -> [String] -> (ParseBuildTool, DependencyVersion) -> Warnings m (Either SystemBuildTool (BuildTool, DependencyVersion))
 toBuildTool packageName_ executableNames = \ case
-  (QualifiedBuildTool pkg executable, v)
-    | pkg == packageName_ && executable `elem` executableNames -> localBuildTool executable v
-    | otherwise -> buildTool pkg executable v
+  (QualifiedBuildTool pkg executable, v) -> buildTool pkg executable v
   (UnqualifiedBuildTool executable, v)
-    | executable `elem` executableNames -> localBuildTool executable v
+    | executable `elem` executableNames -> buildTool packageName_ executable v
     | Just pkg <- lookup executable legacyTools -> legacyBuildTool pkg executable v
     | executable `elem` legacySystemTools, DependencyVersion Nothing c <- v -> legacySystemBuildTool executable c
     | otherwise -> buildTool executable executable v
@@ -1533,7 +1530,6 @@ toBuildTool packageName_ executableNames = \ case
 
     systemBuildTool = return . Left
 
-    localBuildTool executable v = return . Right $ (LocalBuildTool executable, v)
     legacyBuildTool pkg executable v = warnLegacyTool pkg executable >> buildTool pkg executable v
     legacySystemBuildTool executable c = warnLegacySystemTool executable >> systemBuildTool (executable, c)
 

src/Hpack/Render.hs

@@ -351,7 +351,6 @@ data RenderBuildTool = BuildTools String | BuildToolDepends String
 
 renderBuildTool :: (BuildTool,  DependencyVersion) -> RenderBuildTool
 renderBuildTool (buildTool, renderVersion -> version) = case buildTool of
-  LocalBuildTool executable -> BuildTools (executable ++ version)
   BuildTool pkg executable
     | pkg == executable && executable `elem` knownBuildTools -> BuildTools (executable ++ version)
     | otherwise -> BuildToolDepends (pkg ++ ":" ++ executable ++ version)

test/EndToEndSpec.hs

@@ -668,15 +668,15 @@ spec = around_ (inTempDirectoryNamed "my-package") $ do
         }
 
       context "when the name of a build tool matches an executable from the same package" $ do
-        it "adds it to build-tools" $ do
+        it "adds it to build-tool-depends" $ do
           [i|
           executables:
             bar:
               build-tools:
                 - bar
           |] `shouldRenderTo` executable_ "bar" [i|
-          build-tools:
-              bar
+          build-tool-depends:
+              my-package:bar
           |]
 
         it "gives per-section unqualified names precedence over global qualified names" $ do
@@ -688,8 +688,8 @@ spec = around_ (inTempDirectoryNamed "my-package") $ do
               build-tools:
                 - bar == 0.2.0
           |] `shouldRenderTo` executable_ "bar" [i|
-          build-tools:
-              bar ==0.2.0
+          build-tool-depends:
+              my-package:bar ==0.2.0
           |]
 
         it "gives per-section qualified names precedence over global unqualified names" $ do
@@ -701,8 +701,8 @@ spec = around_ (inTempDirectoryNamed "my-package") $ do
               build-tools:
                 - my-package:bar == 0.2.0
           |] `shouldRenderTo` executable_ "bar" [i|
-          build-tools:
-              bar ==0.2.0
+          build-tool-depends:
+              my-package:bar ==0.2.0
           |]
 
       context "when the name of a build tool matches a legacy system build tool" $ do

test/Hpack/ConfigSpec.hs

@@ -157,8 +157,8 @@ spec = do
           toBuildTool_ (UnqualifiedBuildTool "bar") `shouldBe` (Right (BuildTool "bar" "bar", anyVersion), [])
 
       context "when name matches a local executable" $ do
-        it "returns a LocalBuildTool" $ do
-          toBuildTool_ (UnqualifiedBuildTool "foo") `shouldBe` (Right (LocalBuildTool "foo", anyVersion), [])
+        it "uses the current package name" $ do
+          toBuildTool_ (UnqualifiedBuildTool "foo") `shouldBe` (Right (BuildTool "my-package" "foo", anyVersion), [])
 
       context "when name matches a legacy executable" $ do
         it "warns" $ do
@@ -177,10 +177,6 @@ spec = do
         it "returns a BuildTool" $ do
           toBuildTool_ (QualifiedBuildTool "other-package" "foo") `shouldBe` (Right (BuildTool "other-package" "foo", anyVersion), [])
 
-      context "when both package matches the current package and executable matches a local executable" $ do
-        it "returns a LocalBuildTool" $ do
-          toBuildTool_ (QualifiedBuildTool "my-package" "foo") `shouldBe` (Right (LocalBuildTool "foo", anyVersion), [])
-
   describe "readPackageConfig" $ do
     it "warns on missing name" $ do
       withPackageWarnings_ [i|