clever-tools/default.nix

   1 { stdenv, fetchurl, glibc }:
   2
   3 stdenv.mkDerivation rec {
   4   name = "clever-tools-${version}";
   5   version = "1.1.0";
   6
   7   src = fetchurl {
   8     url = "https://clever-tools.cellar.services.clever-cloud.com/releases/${version}/clever-tools-${version}_linux.tar.gz";
   9     sha256 = "1lkwckmlz2gf41xmnzydpcbly0jcry3bn8lp570gha768ic7xmb1";
  10   };
  11
  12   libPath = stdenv.lib.makeLibraryPath [ stdenv.cc.cc glibc ];
  13
  14   installPhase = ''
  15     tar --extract --file=$src
  16     bin=$out/bin/clever
  17     mkdir -p $out/bin
  18     mv clever $bin
  19   '';
  20
  21   dontStrip = "true";
  22
  23   # See https://github.com/brendan-hall/nixpkgs/blob/e3b313bb59f49f10970205aafd44878d35da07e7/pkgs/development/web/now-cli/default.nix#L25
  24   # There is no helper in nixpkgs lib right now
  25   # The algorithm for zeit/pkg fix is given https://github.com/NixOS/nixpkgs/pull/48193
  26   # it has been used for Unity3D as well https://github.com/NixOS/nixpkgs/pull/48643
  27   preFixup = ''
  28     bin=$out/bin/clever
  29     orig_size=$(stat --printf=%s $bin)
  30     patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $bin
  31     patchelf --set-rpath ${libPath} $bin
  32     new_size=$(stat --printf=%s $bin)
  33     ###### zeit-pkg fixing starts here.
  34     # we're replacing plaintext js code that looks like
  35     # PAYLOAD_POSITION = '1234                  ' | 0
  36     # [...]
  37     # PRELUDE_POSITION = '1234                  ' | 0
  38     # ^-----20-chars-----^^------22-chars------^
  39     # ^-- grep points here
  40     #
  41     # var_* are as described above
  42     # shift_by seems to be safe so long as all patchelf adjustments occur
  43     # before any locations pointed to by hardcoded offsets
  44     var_skip=20
  45     var_select=22
  46     shift_by=$(expr $new_size - $orig_size)
  47     function fix_offset {
  48       # $1 = name of variable to adjust
  49       location=$(grep -obUam1 "$1" $bin | cut -d: -f1)
  50       location=$(expr $location + $var_skip)
  51       value=$(dd if=$bin iflag=count_bytes,skip_bytes skip=$location \
  52                  bs=1 count=$var_select status=none)
  53       value=$(expr $shift_by + $value)
  54       echo -n $value | dd of=$bin bs=1 seek=$location conv=notrunc
  55     }
  56     fix_offset PAYLOAD_POSITION
  57     fix_offset PRELUDE_POSITION
  58   '';
  59 }