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68 lines
2.4 KiB
Nix
68 lines
2.4 KiB
Nix
{
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godot3-mono,
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nuget-to-json,
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}:
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godot3-mono.overrideAttrs (
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self: base: {
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pname = "godot3-mono-make-deps";
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nativeBuildInputs = base.nativeBuildInputs ++ [
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nuget-to-json
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];
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nugetDeps = null;
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nugetSource = null;
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nugetConfig = null;
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keepNugetConfig = true;
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outputs = [ "out" ];
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buildPhase = " ";
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installPhase = ''echo "No output intended. Run make-deps.sh instead." > $out'';
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# This script is used to update the accompanying deps.json file, a JSON file listing the
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# nuget packages that the godot-mono code depends on, along with their sha256 hashes. This
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# file is referenced by the godot-mono derivation and needs to be updated every time the
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# godot version is updated. The way it works is:
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#
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# 1) Creates and navigates to a temporary directory and then explicitly runs the unpack,
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# patch, and configure phases from the godot-mono derivation.
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# 2) Instead of building at this point, a nuget restore is performed, downloading all the
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# nuget dependencies of godot-mono into a local folder.
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# 3) Once these have been downloaded, the nuget-to-json tool is used to generate a JSON
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# array listing the locally obtained nuget packages, along with their sha256 hashes.
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# 4) This JSON array is saved as deps.json in the PWD.
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#
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# This process is impure, because it entails downloading files with unknown hashes, so it
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# is run manually by the maintainer within a nix-shell environment. Running the accompanying
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# make-deps.sh instead simplifies this.
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makeDeps = ''
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set -e
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outdir="$(pwd)"
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wrkdir="$(mktemp -d)"
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trap 'rm -rf -- "$wrkdir"' EXIT
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pushd "$wrkdir" > /dev/null
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unpackPhase
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cd source
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patchPhase
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configurePhase
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# Without RestorePackagesPath set, it restores packages to a temp directory. Specifying
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# a path ensures we have a place to run nuget-to-json.
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nugetRestore() { dotnet msbuild -t:Restore -p:RestorePackagesPath=nugetPackages $1; }
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nugetRestore modules/mono/glue/GodotSharp/GodotSharp.sln
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nugetRestore modules/mono/editor/GodotTools/GodotTools.sln
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nuget-to-json nugetPackages > "$outdir"/deps.json
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popd > /dev/null
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'';
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meta = base.meta // {
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description = "Derivation with no output that exists to provide an environment for make-deps.sh";
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};
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}
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)
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