2018-10-11 03:32:08 +02:00
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{ stdenv, lib, fetchurl }:
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stdenv.mkDerivation rec {
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name = "now-cli-${version}";
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2019-04-11 21:59:31 +02:00
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version = "15.0.4";
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2018-10-11 03:32:08 +02:00
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# TODO: switch to building from source, if possible
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src = fetchurl {
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url = "https://github.com/zeit/now-cli/releases/download/${version}/now-linux.gz";
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2019-04-11 21:59:31 +02:00
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sha256 = "7d8fedccce402b3572834cb13a63b343ac2df9e6ad120937289ee88ce6e48d4c";
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2018-10-11 03:32:08 +02:00
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};
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sourceRoot = ".";
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unpackCmd = ''
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gunzip -c $curSrc > now-linux
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'';
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buildPhase = ":";
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installPhase = ''
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mkdir $out
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mkdir $out/bin
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cp now-linux $out/bin/now
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'';
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# now is a node program packaged using zeit/pkg.
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# thus, it contains hardcoded offsets.
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# patchelf shifts these locations when it expands headers.
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# this could probably be generalised into allowing any program packaged
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# with zeit/pkg to be run on nixos.
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preFixup = let
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libPath = lib.makeLibraryPath [stdenv.cc.cc];
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in ''
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orig_size=$(stat --printf=%s $out/bin/now)
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patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/now
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patchelf --set-rpath ${libPath} $out/bin/now
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chmod +x $out/bin/now
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new_size=$(stat --printf=%s $out/bin/now)
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###### zeit-pkg fixing starts here.
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# we're replacing plaintext js code that looks like
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# PAYLOAD_POSITION = '1234 ' | 0
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# [...]
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# PRELUDE_POSITION = '1234 ' | 0
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# ^-----20-chars-----^^------22-chars------^
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# ^-- grep points here
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#
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# var_* are as described above
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2019-01-13 15:24:54 +01:00
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# shift_by seems to be safe so long as all patchelf adjustments occur
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2018-10-11 03:32:08 +02:00
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# before any locations pointed to by hardcoded offsets
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var_skip=20
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var_select=22
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shift_by=$(expr $new_size - $orig_size)
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function fix_offset {
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# $1 = name of variable to adjust
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location=$(grep -obUam1 "$1" $out/bin/now | cut -d: -f1)
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location=$(expr $location + $var_skip)
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value=$(dd if=$out/bin/now iflag=count_bytes,skip_bytes skip=$location \
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bs=1 count=$var_select status=none)
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value=$(expr $shift_by + $value)
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echo -n $value | dd of=$out/bin/now bs=1 seek=$location conv=notrunc
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}
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fix_offset PAYLOAD_POSITION
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fix_offset PRELUDE_POSITION
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'';
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dontStrip = true;
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meta = with stdenv.lib; {
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homepage = https://zeit.co/now;
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description = "The Command Line Interface for Now - Global Serverless Deployments";
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license = licenses.asl20;
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platforms = platforms.linux;
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maintainers = [ maintainers.bhall ];
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};
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2019-01-13 15:24:54 +01:00
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}
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