blob: 2e0f8005bdbdc30b862a779043c35e41ff9d262f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
{ stdenv
, fetchurl
, unzip
}:
stdenv.mkDerivation rec {
pname = "dat";
version = "13.13.1";
suffix = {
x86_64-darwin = "macos-x64";
x86_64-linux = "linux-x64";
}.${stdenv.hostPlatform.system} or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
src = fetchurl {
url = "https://github.com/datproject/dat/releases/download/v${version}/${pname}-${version}-${suffix}.zip";
sha256 = {
x86_64-darwin = "1qj38zn33hhr2v39jw14k2af091bafh5yvhs91h5dnjb2r8yxnaq";
x86_64-linux = "0vgn57kf3j1pbfxlhj4sl1sm2gfd2gcvhk4wz5yf5mzq1vj9ivpv";
}.${stdenv.hostPlatform.system} or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
};
buildInputs = [ unzip ];
dontConfigure = true;
dontBuild = true;
dontStrip = true;
dontPatchELF = true;
installPhase = ''
mkdir -p $out/bin
mv dat $out/bin
'';
# dat is a node program packaged using zeit/pkg.
# thus, it contains hardcoded offsets.
# patchelf shifts these locations when it expands headers.
# this could probably be generalised into allowing any program packaged
# with zeit/pkg to be run on nixos.
preFixup = let
libPath = stdenv.lib.makeLibraryPath [stdenv.cc.cc];
in stdenv.lib.optionalString (!stdenv.isDarwin) ''
orig_size=$(stat --printf=%s $out/bin/dat)
patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/dat
patchelf --set-rpath ${libPath} $out/bin/dat
chmod +x $out/bin/dat
new_size=$(stat --printf=%s $out/bin/dat)
###### zeit-pkg fixing starts here.
# we're replacing plaintext js code that looks like
# PAYLOAD_POSITION = '1234 ' | 0
# [...]
# PRELUDE_POSITION = '1234 ' | 0
# ^-----20-chars-----^^------22-chars------^
# ^-- grep points here
#
# var_* are as described above
# shift_by seems to be safe so long as all patchelf adjustments occur
# before any locations pointed to by hardcoded offsets
var_skip=20
var_select=22
shift_by=$(expr $new_size - $orig_size)
function fix_offset {
# $1 = name of variable to adjust
location=$(grep -obUam1 "$1" $out/bin/dat | cut -d: -f1)
location=$(expr $location + $var_skip)
value=$(dd if=$out/bin/dat iflag=count_bytes,skip_bytes skip=$location \
bs=1 count=$var_select status=none)
value=$(expr $shift_by + $value)
echo -n $value | dd of=$out/bin/dat bs=1 seek=$location conv=notrunc
}
fix_offset PAYLOAD_POSITION
fix_offset PRELUDE_POSITION
'';
meta = with stdenv.lib; {
description = "Peer-to-peer sharing and live synchronization of files";
homepage = "https://dat.foundation/";
license = licenses.bsd3;
platforms = [ "x86_64-linux" "x86_64-darwin" ];
maintainers = with maintainers; [ prusnak ];
};
}
|