pyrox.dev
1{ stdenv, squashfsTools, perl, pathsFromGraph
2
3, # The root directory of the squashfs filesystem is filled with the
4 # closures of the Nix store paths listed here.
5 storeContents ? []
6}:
7
8stdenv.mkDerivation {
9 name = "squashfs.img";
10
11 buildInputs = [perl squashfsTools];
12
13 # For obtaining the closure of `storeContents'.
14 exportReferencesGraph =
15 map (x: [("closure-" + baseNameOf x) x]) storeContents;
16
17 buildCommand =
18 ''
19 # Add the closures of the top-level store objects.
20 storePaths=$(perl ${pathsFromGraph} closure-*)
21
22 # Also include a manifest of the closures in a format suitable
23 # for nix-store --load-db.
24 printRegistration=1 perl ${pathsFromGraph} closure-* > nix-path-registration
25
26 # Generate the squashfs image.
27 mksquashfs nix-path-registration $storePaths $out \
28 -keep-as-directory -all-root -b 1048576 -comp xz -Xdict-size 100%
29 '';
30}