Bump version to 0.6

README.md

@@ -6,24 +6,29 @@
 $ nix build
 ```
 
+## Running
+
+```
+$ nix run
+```
+
 ## Building the Docker image
 
 ```
-# TODO
-$ docker load < $(nix-build nix/docker-image.nix)
+$ docker load < $(nix build .#docker --print-out-paths)
 ```
 
 ## Development Shell
 
-Includes Stack, `haskell-language-server`, `gen-hie` etc.
+Includes Stack, GHC, `haskell-language-server`, `gen-hie` etc.
 
 ```
-nix develop
+$ nix develop
 ```
 
 ## Running Stack and GHC
 
 ```
-nix run .#stack
-nix run .#ghc
+$ nix run .#stack
+$ nix run .#ghc
 ```

app/Main.hs

@@ -24,6 +24,7 @@ import Network.Wai (Application)
 import Servant
   ( Accept (..)
   , Handler
+  , Header
   , MimeRender (..)
   , Server
   , ServerError (..)
@@ -61,14 +62,18 @@ app :: Application
 app = serve (Proxy :: Proxy API) server
 
 type API =
-  "utf8" :> Capture "bytes" Text :> Get '[PlainText, HTML] Utf8Model
+  Header "Host" Text :> Get '[PlainText, HTML] RootModel
+  :<|> "utf8" :> Capture "bytes" Text :> Get '[PlainText, HTML] Utf8Model
   :<|> "codepoints" :> Capture "codepoints" Text :> Get '[PlainText, HTML] CodepointsModel
   :<|> "text" :> Capture "text" Text :> Get '[PlainText, HTML] TextModel
 
 server :: Server API
 server =
-  utf8R :<|> codepointsR :<|> textR
+  rootR :<|> utf8R :<|> codepointsR :<|> textR
   where
+    rootR host = do
+      pure $ RootModel $ fromMaybe "" host
+
     utf8R bytesP = do
       bytes <- Parsers.parseHexBytes bytesP `orThrow` const err400
       pure $ mkUtf8Model bytes
@@ -80,6 +85,38 @@ server =
     textR textP = do
       pure $ TextModel textP
 
+-- /
+
+newtype RootModel = RootModel
+  { host :: Text
+  }
+
+examples :: [Text]
+examples =
+  [ "/text/✅🤔"
+  , "/codepoints/x2705+x1F914"
+  , "/utf8/e2.9c.85.f0.9f.a4.94"
+  ]
+
+instance MimeRender PlainText RootModel where
+  mimeRender _ model = renderText $ Text.unlines $
+    [ "⚞ utoy ⚟"
+    , ""
+    , "This is utoy, a URL-based Unicode playground. Examples:"
+    , ""
+    ] ++ map (urlBase <>) examples
+    where
+      -- We assume HTTPS here. Doesn't work for development on localhost.
+      urlBase = "https://" <> model.host
+
+instance MimeRender HTML RootModel where
+  mimeRender _ model = renderHtml $ documentWithBody $ do
+    H.h1 $ H.toHtml ("⚞ utoy ⚟" :: Text)
+    H.p $ H.toHtml ("This is utoy, a URL-based Unicode playground. Examples:" :: Text)
+    H.ul $ for_ examples $ \example -> do
+      let url = "https://" <> model.host <> example
+      H.li $ H.a ! A.href (H.toValue url) $ H.toHtml example
+
 -- /bytes/<bytes>
 
 newtype Utf8Model = Utf8Model
@@ -197,7 +234,7 @@ instance MimeRender HTML TextModel where
 
 instance MimeRender PlainText TextModel where
   mimeRender _ model = renderText $ Table.render "  "
-    [ map (Table.cl)
+    [ map Table.cl
       [ Text.pack [c]
       , Text.pack $ printf "U+%04X" c
       , Text.pack $ intercalate ", " $ allNames c
@@ -241,7 +278,7 @@ documentWithBody body =
       H.meta ! A.charset "utf-8"
       H.title "utoy"
       H.style $ H.toHtml $ Encoding.decodeUtf8 $(embedFile "static/utoy.css")
-    H.body body
+    H.body $ H.main body
 
 -- HTML routes
 

flake.nix

@@ -13,27 +13,37 @@
       haskellPackages = pkgs.haskell.packages."${settings.ghc}";
 
       ghc = haskellPackages.ghcWithPackages haskellDeps;
+
+      # Wrap stack to disable its slow Nix integration.
+      # Instead, make it use the GHC defined above.
       stack = pkgs.stdenv.mkDerivation {
         name = "stack";
-        dontUnpack = true;
-        dontConfigure = true;
-        dontBuild = true;
+
+        # The build is simply a call to makeWrapper, so we don't have to
+        # do any of the typical build steps.
+        phases = [ "installPhase" ];
+
         nativeBuildInputs = [ pkgs.makeWrapper ];
+        # makeBinaryWrapper creates a stack executable for us that uses
+        # the GHC defined in this file.
         installPhase = ''
           makeWrapper ${pkgs.stack}/bin/stack $out/bin/stack \
             --prefix PATH : ${ghc}/bin \
             --add-flags '--no-nix --system-ghc --no-install-ghc'
         '';
       };
-      utoy' =
-        { mkDerivation }:
+
+      utoy = pkgs.haskell.lib.justStaticExecutables (haskellPackages.callPackage
+        ({ mkDerivation }:
         mkDerivation {
-          version = "0.5";
+          # Keep this in sync with package.yaml
+          version = "0.6";
           pname = "utoy";
           license = pkgs.lib.licenses.mit;
           src =
+            # We only need these files for building:
             let
-              buildFiles = [
+              whitelist = [
                 ./LICENSE
                 ./utoy.cabal
                 ./Setup.hs
@@ -45,17 +55,21 @@
             in
               pkgs.lib.sources.cleanSourceWith {
                 src = ./.;
-                filter = path: _type: pkgs.lib.any (prefix: pkgs.lib.hasPrefix (toString prefix) path) buildFiles;
+                filter = path: _type: pkgs.lib.any (prefix: pkgs.lib.hasPrefix (toString prefix) path) whitelist;
               };
-
           libraryHaskellDepends = haskellDeps haskellPackages;
-        };
-        utoy = pkgs.haskell.lib.justStaticExecutables (haskellPackages.callPackage utoy' {});
+        }) {});
     in {
       packages.x86_64-linux = {
         inherit ghc;
         inherit stack;
-        inherit utoy;
+
+        docker = 
+          pkgs.dockerTools.buildImage {
+            name = "git.pbrinkmeier.de/paul/utoy";
+            tag = utoy.version;
+            config.Cmd = [ "${utoy}/bin/utoy" ];
+          };
 
         default = utoy;
       };

nix/docker-image.nix

@@ -1,9 +0,0 @@
-let
-  pkgs = import ./pkgs.nix {};
-  utoy = import ../utoy.nix;
-in
-  pkgs.dockerTools.buildImage {
-    name = "git.pbrinkmeier.de/paul/utoy";
-    tag = utoy.version;
-    config.Cmd = [ "${utoy}/bin/utoy" ];
-  }

package.yaml

@@ -1,7 +1,8 @@
 # Adapted from new-template.hsfiles
 
 name:                utoy
-version:             0.5
+# Keep this in sync with the version in flake.nix.
+version:             0.6
 git:                 "https://git.pbrinkmeier.de/paul/utoy"
 license:             MIT
 author:              "Paul Brinkmeier"

stack.yaml

@@ -1,4 +1,5 @@
 # You can get a working environment using nix develop.
+# Keep this in sync with nix/settings.nix
 resolver: ghc-9.4.4
 packages:
 - .

utoy.cabal

@@ -5,7 +5,7 @@ cabal-version: 1.12
 -- see: https://github.com/sol/hpack
 
 name:           utoy
-version:        0.5
+version:        0.6
 author:         Paul Brinkmeier
 maintainer:     hallo@pbrinkmeier.de
 copyright:      2023 Paul Brinkmeier