Adds haskell-docs-cli

packages/haskell-docs-cli.nix

@@ -0,0 +1,42 @@
+{ mkDerivation, aeson, ansi-wl-pprint, async, base, bytestring
+, containers, directory, exceptions, extra, filepath, hashable
+, haskeline, hoogle, html-conduit, http-client, http-client-tls
+, http-types, lib, mtl, network-uri, optparse-applicative, process
+, temporary, terminal-size, text, time, transformers, xml-conduit
+}:
+mkDerivation {
+  pname = "haskell-docs-cli";
+  version = "1.0.0.0";
+  sha256 = "c19d975dd499b5a461e2a45faa99e933bba7901141321dc9c106b7c6e7a3e267";
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    aeson ansi-wl-pprint async base bytestring containers directory
+    exceptions extra filepath hashable haskeline hoogle html-conduit
+    http-client http-client-tls http-types mtl network-uri
+    optparse-applicative process temporary terminal-size text time
+    transformers xml-conduit
+  ];
+  executableHaskellDepends = [
+    aeson ansi-wl-pprint async base bytestring containers directory
+    exceptions extra filepath hashable haskeline hoogle html-conduit
+    http-client http-client-tls http-types mtl network-uri
+    optparse-applicative process temporary terminal-size text time
+    transformers xml-conduit
+  ];
+  testHaskellDepends = [
+    aeson ansi-wl-pprint async base bytestring containers directory
+    exceptions extra filepath hashable haskeline hoogle html-conduit
+    http-client http-client-tls http-types mtl network-uri
+    optparse-applicative process temporary terminal-size text time
+    transformers xml-conduit
+  ];
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  hyperlinkSource = false;
+  homepage = "https://github.com/lazamar/haskell-docs-cli#readme";
+  description = "Search Hoogle and navigate Hackage from the command line";
+  license = lib.licenses.bsd3;
+  mainProgram = "hdc";
+}

packages/optparse-applicative.nix

@@ -0,0 +1,21 @@
+{ mkDerivation, ansi-wl-pprint, base, lib, process, QuickCheck
+, transformers, transformers-compat
+}:
+mkDerivation {
+  pname = "optparse-applicative";
+  version = "0.17.1.0";
+  sha256 = "d179cb740139c55e6dada3c00efaea45f6853a1974d374668323bbbd07e0a5ef";
+  revision = "1";
+  editedCabalFile = "1mhyjlmb1hylmhv77w6gq663drpyiqd09w1x1vy4d63lr46mypyb";
+  libraryHaskellDepends = [
+    ansi-wl-pprint base process transformers transformers-compat
+  ];
+  testHaskellDepends = [ base QuickCheck ];
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  hyperlinkSource = false;
+  homepage = "https://github.com/pcapriotti/optparse-applicative";
+  description = "Utilities and combinators for parsing command line options";
+  license = lib.licenses.bsd3;
+}

programs/default.nix

@@ -52,6 +52,13 @@ let
     brotli
     cabal2nix
     (opaComplete "cabal-plan" (leanHaskellBinary haskellPackages.cabal-plan))
+    (opaComplete "hdc" (
+      leanHaskellBinary (
+        pkgs.haskellPackages.callPackage ../packages/haskell-docs-cli.nix {
+          optparse-applicative = pkgs.haskellPackages.callPackage ../packages/optparse-applicative.nix { };
+        }
+      )
+    ))
     cloc
     difftastic
     dua