tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
1{
2 gzip,
3 runCommand,
4 compressDrv,
5}:
6let
7 example = runCommand "sample-drv" { } ''
8 mkdir $out
9 echo 42 > $out/1.txt
10 echo 43 > $out/1.md
11 touch $out/2.png
12 '';
13 drv = compressDrv example {
14 formats = [ "txt" ];
15 compressors.gz = "${gzip}/bin/gzip --force --keep --fast {}";
16 };
17 wrapped = compressDrv drv {
18 formats = [ "md" ];
19 compressors.gz = "${gzip}/bin/gzip --force --keep --fast {}";
20 };
21in
22runCommand "test-compressDrv" { } ''
23 set -ex
24
25 ls -l ${drv}
26 test -h ${drv}/1.txt
27 test -f ${drv}/1.txt.gz
28 cmp ${drv}/1.txt <(${gzip}/bin/zcat ${drv}/1.txt.gz)
29
30 test -h ${drv}/2.png
31 test ! -a ${drv}/2.png.gz
32
33 # compressDrv always points to the final file, no matter how many times
34 # it's been wrapped
35 cmp <(readlink -e ${drv}/1.txt) <(readlink -e ${wrapped}/1.txt)
36
37 test -f ${wrapped}/1.txt.gz
38 test -f ${wrapped}/1.md.gz
39 test ! -f ${drv}/1.md.gz
40
41 mkdir $out
42''