nix-top: init at 0.3.0

This was removed in 329081dc4b72a2b177e034b67fd14484eddf150c, but
since I find this package useful, I'll make an attempt to maintain it.
Fortunately someone had forked the repo before it was deleted.

The derivation has been modified slightly to reflect PR feedback.

1 files changed, 62 insertions, 0 deletions

diff --git a/pkgs/by-name/ni/nix-top/package.nix b/pkgs/by-name/ni/nix-top/package.nix
new file mode 100644
index 000000000000..55170ec40896
--- /dev/null
+++ b/pkgs/by-name/ni/nix-top/package.nix
@@ -0,0 +1,62 @@
+{
+  binutils-unwrapped, # strings
+  coreutils,
+  getent, # /etc/passwd
+  fetchFromGitHub,
+  findutils,
+  lib,
+  makeWrapper,
+  ncurses, # tput
+  ruby,
+  stdenv,
+}:
+
+# No gems used, so mkDerivation is fine.
+let
+  additionalPath = lib.makeBinPath [
+    getent
+    ncurses
+    binutils-unwrapped
+    coreutils
+    findutils
+  ];
+in
+stdenv.mkDerivation rec {
+  pname = "nix-top";
+  version = "0.3.0";
+
+  src = fetchFromGitHub {
+    owner = "jerith666";
+    repo = "nix-top";
+    rev = "v${version}";
+    hash = "sha256-w/TKzbZmMt4CX2KnLwPvR1ydp5NNlp9nNx78jJvhp54=";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  buildInputs = [ ruby ];
+
+  installPhase =
+    ''
+      runHook preInstall
+      mkdir -p $out/libexec/nix-top
+      install -D -m755 ./nix-top $out/bin/nix-top
+      wrapProgram $out/bin/nix-top \
+        --prefix PATH : "$out/libexec/nix-top:${additionalPath}"
+    ''
+    + lib.optionalString stdenv.isDarwin ''
+      ln -s /bin/stty $out/libexec/nix-top
+    ''
+    + ''
+      runHook postInstall
+    '';
+
+  meta = {
+    description = "Tracks what nix is building";
+    homepage = "https://github.com/jerith666/nix-top";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.jerith666 ];
+    platforms = lib.platforms.unix;
+    mainProgram = "nix-top";
+  };
+}