Fix renderDownloadWithVersion concatenation order

lib/SlackBuilder/Package.hs

@@ -68,8 +68,8 @@ renderDownloadWithVersion :: MonadThrow m => DownloadTemplate -> Text -> m URI
 renderDownloadWithVersion (DownloadTemplate components) version =
     URI.mkURI $ foldr f "" components
   where
-    f (StaticPlaceholder staticPlaceholder) accumulator = accumulator <> staticPlaceholder
+    f (StaticPlaceholder staticPlaceholder) = (staticPlaceholder <>)
-    f VersionPlaceholder accumulator = accumulator <> version
+    f VersionPlaceholder = (version <>)
 
 -- | Function used to get the latest version of a source.
 data Updater = Updater (SlackBuilderT (Maybe Text)) DownloadTemplate

slackbuilder.cabal

@@ -16,7 +16,6 @@ category: Build
 extra-source-files: CHANGELOG.md
 
 common dependencies
-  ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
   build-depends:
     base ^>= 4.16.4.0,
     cryptonite >= 0.30,
@@ -47,6 +46,8 @@ library slackbuilder-internal
     tomland ^>= 1.3.3,
     transformers ^>= 0.5.6
 
+  ghc-options: -Wall
+
 executable slackbuilder
   import: dependencies
   main-is: Main.hs
@@ -67,6 +68,8 @@ executable slackbuilder
     vector ^>= 0.13.0
   hs-source-dirs: app
 
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
+
 test-suite slackbuilder-test
   import: dependencies
   type: exitcode-stdio-1.0
@@ -78,3 +81,5 @@ test-suite slackbuilder-test
   build-depends:
     hspec >= 2.10.9 && < 2.12,
     slackbuilder-internal
+
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall

tests/SlackBuilder/PackageSpec.hs

@@ -2,13 +2,14 @@ module SlackBuilder.PackageSpec
     ( spec
     ) where 
 
+import Data.List.NonEmpty (NonEmpty(..))
 import SlackBuilder.Package
 import Test.Hspec (Spec, describe, it, shouldBe)
 import Text.URI.QQ (uri)
 
 spec :: Spec
 spec = do
-    describe "renderDownloadWithVersion" $
+    describe "renderDownloadWithVersion" $ do
         it "renders text as URL" $
             let given = DownloadTemplate
                     $ pure
@@ -16,3 +17,11 @@ spec = do
                 actual = renderDownloadWithVersion given "1.2"
                 expected = Just [uri|https://example.com|]
              in actual `shouldBe` expected
+
+        it "renders the components in order" $
+            let given = DownloadTemplate
+                    $ StaticPlaceholder "https://example.com/"
+                    :| [VersionPlaceholder, StaticPlaceholder "/segment"]
+                actual = renderDownloadWithVersion given "1.2"
+                expected = Just [uri|https://example.com/1.2/segment|]
+             in actual `shouldBe` expected