3 files changed, 143 insertions, 0 deletions
diff --git a/pkgs/development/tools/purescript/spago/default.nix b/pkgs/development/tools/purescript/spago/default.nix
new file mode 100644
index 00000000000..51516ed5b25
--- /dev/null
+++ b/pkgs/development/tools/purescript/spago/default.nix
@@ -0,0 +1,61 @@
+{ haskell
+, haskellPackages
+, lib
+
+# The following are only needed for the passthru.tests:
+, cacert
+, git
+, nodejs
+, purescript
+, runCommand
+}:
+
+let
+  spago =
+    haskell.lib.compose.justStaticExecutables
+      (haskell.lib.compose.overrideCabal (oldAttrs: {
+        maintainers = (oldAttrs.maintainers or []) ++ [
+          lib.maintainers.cdepillabout
+        ];
+        changelog =
+          "https://github.com/purescript/spago/releases/tag/${oldAttrs.version}";
+      }) haskellPackages.spago);
+in
+
+spago.overrideAttrs (oldAttrs: {
+  passthru = (oldAttrs.passthru or {}) // {
+    updateScript = ./update.sh;
+
+    # These tests can be run with the following command.  The tests access the
+    # network, so they cannot be run in the nix sandbox.  sudo is needed in
+    # order to change the sandbox option.
+    #
+    # $ sudo nix-build -A spago.passthru.tests --option sandbox relaxed
+    #
+    tests =
+      runCommand
+        "spago-tests"
+        {
+          __noChroot = true;
+          nativeBuildInputs = [
+            cacert
+            git
+            nodejs
+            purescript
+            spago
+          ];
+        }
+        ''
+          # spago expects HOME to be set because it creates a cache file under
+          # home.
+          HOME=$(pwd)
+
+          spago --verbose init
+          spago --verbose build
+          spago --verbose test
+
+          touch $out
+        '';
+  };
+})
+
diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
new file mode 100644
index 00000000000..1747aaa55fd
--- /dev/null
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -0,0 +1,46 @@
+# This has been automatically generated by the script
+# ./update.sh.  This should not be changed by hand.
+{ mkDerivation, aeson, aeson-pretty, ansi-terminal, async-pool
+, base, bower-json, bytestring, containers, cryptonite, dhall
+, directory, either, extra, fetchgit, file-embed, filepath, foldl
+, fsnotify, generic-lens, Glob, hspec, hspec-discover
+, hspec-megaparsec, http-client, http-conduit, http-types
+, lens-family-core, lib, megaparsec, mtl, network-uri, open-browser
+, optparse-applicative, prettyprinter, process, QuickCheck, retry
+, rio, rio-orphans, safe, semver-range, stm, stringsearch, tar
+, template-haskell, temporary, text, time, transformers, turtle
+, unliftio, unordered-containers, utf8-string, versions, with-utf8
+, zlib
+}:
+mkDerivation {
+  pname = "spago";
+  version = "0.20.7";
+  src = fetchgit {
+    url = "https://github.com/purescript/spago.git";
+    sha256 = "0k9ablqhx4m1hk0sc0rx824qq5gr7fp7dpg9rj5v793v6hd3q4jv";
+    rev = "41d9c967dc1db0de03985e31083eb76b3e2fcce4";
+    fetchSubmodules = true;
+  };
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    aeson aeson-pretty ansi-terminal async-pool base bower-json
+    bytestring containers cryptonite dhall directory either file-embed
+    filepath foldl fsnotify generic-lens Glob http-client http-conduit
+    http-types lens-family-core megaparsec mtl network-uri open-browser
+    optparse-applicative prettyprinter process retry rio rio-orphans
+    safe semver-range stm stringsearch tar template-haskell temporary
+    text time transformers turtle unliftio unordered-containers
+    utf8-string versions with-utf8 zlib
+  ];
+  executableHaskellDepends = [
+    ansi-terminal base text turtle with-utf8
+  ];
+  testHaskellDepends = [
+    base containers directory extra hspec hspec-megaparsec megaparsec
+    process QuickCheck temporary text turtle versions
+  ];
+  testToolDepends = [ hspec-discover ];
+  homepage = "https://github.com/purescript/spago#readme";
+  license = lib.licenses.bsd3;
+}
diff --git a/pkgs/development/tools/purescript/spago/update.sh b/pkgs/development/tools/purescript/spago/update.sh
new file mode 100755
index 00000000000..12595885df3
--- /dev/null
+++ b/pkgs/development/tools/purescript/spago/update.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p cabal2nix curl jq haskellPackages.cabal2nix-unstable -I nixpkgs=.
+#
+# This script will update the spago derivation to the latest version using
+# cabal2nix.
+#
+# Note that you should always try building spago after updating it here, since
+# some of the overrides in pkgs/development/haskell/configuration-nix.nix may
+# need to be updated/changed.
+
+set -eo pipefail
+
+# This is the directory of this update.sh script.
+script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# Spago derivation created with cabal2nix.
+spago_derivation_file="${script_dir}/spago.nix"
+
+# This is the current revision of spago in Nixpkgs.
+old_version="$(sed -En 's/.*\bversion = "(.*?)".*/\1/p' "$spago_derivation_file")"
+
+# This is the latest release version of spago on GitHub.
+new_version=$(curl --silent "https://api.github.com/repos/purescript/spago/releases" | jq '.[0].tag_name' --raw-output)
+
+echo "Updating spago from old version $old_version to new version $new_version."
+echo "Running cabal2nix and outputting to ${spago_derivation_file}..."
+
+echo "# This has been automatically generated by the script" > "$spago_derivation_file"
+echo "# ./update.sh.  This should not be changed by hand." >> "$spago_derivation_file"
+
+cabal2nix --revision "$new_version" "https://github.com/purescript/spago.git" >> "$spago_derivation_file"
+
+# TODO: This should ideally also automatically update the docsSearchVersion
+# from pkgs/development/haskell/configuration-nix.nix.
+
+echo "Finished."