clever-tools/default.nix

   1 { stdenv, fetchurl, glibc }:
   2
   3 stdenv.mkDerivation rec {
   4   name = "clever-tools-${version}";
   5   version = "2.6.0";
   6
   7   src = fetchurl {
   8     url = "https://clever-tools.clever-cloud.com/releases/${version}/clever-tools-${version}_linux.tar.gz";
   9     sha256 = "0ibnwayl73q54gh2l8b14wc8cr5rvxn2nxpczcz6swwrwwyny0h1";
  10   };
  11
  12   libPath = stdenv.lib.makeLibraryPath [ stdenv.cc.cc glibc ];
  13
  14   unpackPhase = ''
  15     tar --extract --file=$src
  16   '';
  17
  18   installPhase = ''
  19     bin=$out/bin/clever
  20     mkdir -p $out/bin
  21     mv clever-tools-${version}_linux/clever $bin
  22   '';
  23
  24   dontStrip = "true";
  25
  26   # See https://github.com/brendan-hall/nixpkgs/blob/e3b313bb59f49f10970205aafd44878d35da07e7/pkgs/development/web/now-cli/default.nix#L25
  27   # There is no helper in nixpkgs lib right now
  28   # The algorithm for zeit/pkg fix is given https://github.com/NixOS/nixpkgs/pull/48193
  29   # it has been used for Unity3D as well https://github.com/NixOS/nixpkgs/pull/48643
  30   preFixup = ''
  31     bin=$out/bin/clever
  32     orig_size=$(stat --printf=%s $bin)
  33     patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $bin
  34     patchelf --set-rpath ${libPath} $bin
  35     new_size=$(stat --printf=%s $bin)
  36     ###### zeit-pkg fixing starts here.
  37     # we're replacing plaintext js code that looks like
  38     # PAYLOAD_POSITION = '1234                  ' | 0
  39     # [...]
  40     # PRELUDE_POSITION = '1234                  ' | 0
  41     # ^-----20-chars-----^^------22-chars------^
  42     # ^-- grep points here
  43     #
  44     # var_* are as described above
  45     # shift_by seems to be safe so long as all patchelf adjustments occur
  46     # before any locations pointed to by hardcoded offsets
  47     var_skip=20
  48     var_select=22
  49     shift_by=$(expr $new_size - $orig_size)
  50     function fix_offset {
  51       # $1 = name of variable to adjust
  52       location=$(grep -obUam1 "$1" $bin | cut -d: -f1)
  53       location=$(expr $location + $var_skip)
  54       value=$(dd if=$bin iflag=count_bytes,skip_bytes skip=$location \
  55                  bs=1 count=$var_select status=none)
  56       value=$(expr $shift_by + $value)
  57       echo -n $value | dd of=$bin bs=1 seek=$location conv=notrunc
  58     }
  59     fix_offset PAYLOAD_POSITION
  60     fix_offset PRELUDE_POSITION
  61   '';
  62 }