36 lines
1.6 KiB
Nix
36 lines
1.6 KiB
Nix
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# Where do tcc-seed and protosrc come from if you build with Nix?
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# When building with `make` or `build.sh` you'll have tcc-seed and protosrc
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# long long before you have Nix,
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# so there's no question of where to take them from, you just inject'em.
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# In this case this file isn't used at all and a simpler 0.nix is generated,
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# see recipes/4-rebootstrap-using-nix.sh
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# But not everyone wants to go the full bootstrap route.
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# This file is for when you already have Nix and want to jump into the middle,
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# starting from the second, `using-nix` half of the bootstrap.
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# Cases like hydra or flake-building.
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# One option is to build them using nixpkgs (see 0-from-nixpkgs.nix),
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# but then you need nixpkgs, IFD and stuff.
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# Alternatively we could download them prebuilt from github:ZilchOS,
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# but then there's the question of falling back to another method
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# when recipes/1-stage1/seed.host-executed.sh or recipes/1-stage1/syscall.h
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# are updated.
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# Here's one weird combined approach:
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let
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and = builtins.all (x: x);
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syscall_h_ours = "${../recipes/1-stage1/syscall.h}";
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syscall_h_reference = "/nix/store/678g5j997qzp0srprfg4gqqxcp8mr3g9-syscall.h";
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syscall_h_is_unmodified = (syscall_h_ours == syscall_h_reference);
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stage1_seeder_ours = "${../recipes/1-stage1/seed.host-executed.sh}";
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stage1_seeder_reference = "/nix/store/qv4rmbdclws5nrx3m1vw1pb98qacw226-seed.host-executed.sh";
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stage1_seeder_is_unmodified = (stage1_seeder_ours == stage1_seeder_reference);
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in
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if (and [ syscall_h_is_unmodified stage1_seeder_is_unmodified ])
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then import ./0-prebuilt.nix
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else import ./0-from-nixpkgs.nix
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