add git-rebuild

when you're running on a server and pushing changes, it's nice to have
just one command that does that and nothing else. this is that command.

builds/rebuild.nix

@@ -18,6 +18,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     mkdir -p $out/bin
     cp $src/rebuild $out/bin
+    cp $src/git-rebuild $out/bin
     wrapProgram $out/bin/rebuild --prefix PATH : ${lib.makeBinPath [ bash ]}
   '';
 

builds/rebuild/git-rebuild

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# make sure we're in dot_testing
+cd ~/dot_testing
+
+git pull
+git stash
+git rebase
+
+rebuild