Added flaresolverr service and some other

packages/flaresolverr/default.nix

@@ -0,0 +1,68 @@
+{ pkgs, stdenv }:  
+with pkgs;
+
+stdenv.mkDerivation rec {
+
+pname = "flaresolverr";
+version = "2.2.0";
+
+src = fetchurl {
+    url = "https://github.com/FlareSolverr/FlareSolverr/releases/download/v2.2.0/flaresolverr-v2.2.0-linux-x64.zip";
+    sha256 = "sha256-n3/pbcbz06rPArKizk8j0vNVoEJan7jSOU4fQq29wxg=";
+  };
+
+
+  nativeBuildInputs = [
+    unzip
+  ];
+
+  buildInputs = [ gcc stdenv.cc.cc.lib firefox ];
+
+    preFixup = let
+    libPath = lib.makeLibraryPath [stdenv.cc.cc];
+  in ''
+    orig_size=$(stat --printf=%s $out/bin/flaresolverr)
+    patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/flaresolverr
+    patchelf --set-rpath ${libPath} $out/bin/flaresolverr
+    chmod +x $out/bin/flaresolverr
+    new_size=$(stat --printf=%s $out/bin/flaresolverr)
+    ###### zeit-pkg fixing starts here.
+    # we're replacing plaintext js code that looks like
+    # PAYLOAD_POSITION = '1234                  ' | 0
+    # [...]
+    # PRELUDE_POSITION = '1234                  ' | 0
+    # ^-----20-chars-----^^------22-chars------^
+    # ^-- grep points here
+        #
+    # var_* are as described above
+    # shift_by seems to be safe so long as all patchelf adjustments occur 
+    # before any locations pointed to by hardcoded offsets
+    var_skip=20
+    var_select=22
+    shift_by=$(expr $new_size - $orig_size)
+    function fix_offset {
+      # $1 = name of variable to adjust
+      location=$(grep -obUam1 "$1" $out/bin/flaresolverr | cut -d: -f1)
+      location=$(expr $location + $var_skip)
+      value=$(dd if=$out/bin/flaresolverr iflag=count_bytes,skip_bytes skip=$location \
+                 bs=1 count=$var_select status=none)
+      value=$(expr $shift_by + $value)
+      echo -n $value | dd of=$out/bin/flaresolverr bs=1 seek=$location conv=notrunc
+    }
+    fix_offset PAYLOAD_POSITION
+    fix_offset PRELUDE_POSITION
+    '';
+
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp flaresolverr $out/bin/
+    mkdir -p $out/bin/firefox
+    ln -s ${pkgs.firefox}/bin/firefox $out/bin/firefox/firefox
+  '';
+
+   dontStrip = true;
+
+
+
+}