2 files changed, 45 insertions, 0 deletions
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 0000000..0f6f82b
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,4 @@
+{ }:
+{
+  mkThinShim = import ./thin-shim.nix;
+}
diff --git a/lib/thin-shim.nix b/lib/thin-shim.nix
new file mode 100644
index 0000000..a9f931b
--- /dev/null
+++ b/lib/thin-shim.nix
@@ -0,0 +1,41 @@
+pkgs:
+let
+  inherit (builtins)
+    map elem;
+
+  inherit (pkgs) stdenv;
+in
+pkg: inst:
+stdenv.mkDerivation {
+  pname = pkg.pname + "-shim";
+  version = pkg.version;
+  nativeBuildInputs = [pkg];
+  dontUnpack = true;
+  buildPhase = ''
+if [ -d ${pkg}/bin ]; then
+    mkdir -p "$out/bin"
+    for exe in $(ls "${pkg}/bin/"); do
+        cat >"$out/bin/$exe" <<EOF
+#!/bin/sh
+
+term=urxvt
+which \$term >/dev/null 2>&1 || term=xterm
+
+if [ "\$DISPLAY" ]; then
+    \$term -e nix shell '${inst}' --command '$exe' \$*
+else
+    nix shell '${inst}' --command '$exe' \$*
+fi
+EOF
+        chmod +x "$out/bin/$exe"
+    done
+fi
+
+for dir in "share/applications" "share/icons"; do
+    if [ -d "${pkg}/$dir" ]; then
+        mkdir -p "$out/$dir"
+        cp -a "${pkg}/$dir/"* "$out/$dir"
+    fi
+done
+'';
+}