Add Sqitch database management tool

pkgs/development/tools/misc/sqitch/default.nix

@@ -0,0 +1,21 @@
+{ stdenv, writeScript, makeWrapper, sqitchModule }:
+stdenv.mkDerivation rec {
+  name = "sqitch-0.999";
+  buildInputs = [ makeWrapper ];
+  propagatedNativeBuildInputs = [ sqitchModule ];
+  builder = writeScript (name + "-builder.sh") ''
+    . ${stdenv}/setup
+    mkdir -p $out/bin
+    cp ${sqitchModule}/bin/sqitch $out/bin
+    fixupPhase
+    wrapProgram $out/bin/sqitch \
+      --prefix PERL5LIB : \
+      "$(for i in "$propagatedNativeBuildInputs" ; do
+           for j in $(cat $i/nix-support/propagated-native-build-inputs) ; do
+             echo -n "$j"/lib/perl5/site_perl:
+           done
+         done
+         echo "$propagatedNativeBuildInputs"/lib/perl5/site_perl
+        )"
+  '';
+}