nix: Add a tool for checking Haskell imports and exports (#1768)

2021-04-06 11:46:12 +02:00
parent 9f074cecce
commit 65e7f9e846
11 changed files with 517 additions and 33 deletions
@@ -0,0 +1,30 @@
+{ ghcWithPackages
+, runCommand
+}:
+let
+  name = "hsie";
+  src = ./Main.hs;
+  modules = ps: [
+    ps.aeson
+    ps.aeson-pretty
+    ps.cassava
+    ps.dir-traverse
+    ps.dot
+    ps.ghc-exactprint
+    ps.optparse-applicative
+  ];
+  ghc = ghcWithPackages modules;
+  hsie =
+    runCommand "haskellimports" { inherit name src; }
+      "${ghc}/bin/ghc -O -Werror -Wall -package ghc $src -o $out";
+  bin =
+    runCommand name { inherit hsie name; }
+      ''
+        mkdir -p $out/bin
+        ln -s $hsie $out/bin/$name
+      '';
+  bashCompletion =
+    runCommand "${name}-bash-completion" { inherit bin name; }
+      "$bin/bin/$name --bash-completion-script $bin/bin/$name > $out";
+in
+hsie // { inherit bashCompletion bin; }