packaging: Update rc-testdata...
packaging: Update rc-testdata I've seen upcoming trouble with recent nixpkgs and updated the default.nix inside of rc-testdata. This change makes use of the new version for enterprise.

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r198:f1210dd3 default
r940:1fece5a0 default
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license.nix
160 lines | 4.9 KiB | text/x-nix | NixLexer
project: added all source files and assets
r1 # Utility to generate the license information
#
# Usage:
#
# nix-build -I ~/dev license.nix -A result
#
# Afterwards ./result will contain the license information as JSON files.
#
#
# Overview
#
# Uses two steps to get the relevant license information:
#
# 1. Walk down the derivations based on "buildInputs" and
# "propagatedBuildInputs". This results in all dependencies based on the nix
# declartions.
#
# 2. Build Enterprise and query nix-store to get a list of runtime
# dependencies. The results from step 1 are then limited to the ones which
# are in this list.
#
# The result is then available in ./result/license.json.
#
let
nixpkgs = import <nixpkgs> {};
stdenv = nixpkgs.stdenv;
# Enterprise as simple as possible, goal here is just to identify the runtime
# dependencies. Ideally we could avoid building Enterprise at all and somehow
# figure it out without calling into nix-store.
enterprise = import ./default.nix {
doCheck = false;
};
# For a given derivation, return the list of all dependencies
drvToDependencies = drv: nixpkgs.lib.flatten [
drv.nativeBuildInputs or []
drv.propagatedNativeBuildInputs or []
];
# Transform the given derivation into the meta information which we need in
# the resulting JSON files.
drvToMeta = drv: {
name = drv.name or "UNNAMED";
license = if drv ? meta.license then drv.meta.license else "UNKNOWN";
};
# Walk the tree of buildInputs and propagatedBuildInputs and return it as a
# flat list. Duplicates are avoided.
listDrvDependencies = drv: let
addElement = element: seen:
if (builtins.elem element seen)
then seen
else let
newSeen = seen ++ [ element ];
newDeps = drvToDependencies element;
in nixpkgs.lib.fold addElement newSeen newDeps;
initialElements = drvToDependencies drv;
in nixpkgs.lib.fold addElement [] initialElements;
# Reads in a file with store paths and returns a list of derivation names.
#
# Reads the file, splits the lines, then removes the prefix, so that we
# end up with a list of derivation names in the end.
storePathsToDrvNames = srcPath: let
rawStorePaths = nixpkgs.lib.removeSuffix "\n" (
builtins.readFile srcPath);
storePaths = nixpkgs.lib.splitString "\n" rawStorePaths;
# TODO: johbo: Would be nice to use some sort of utility here to convert
# the path to a derivation name.
storePathPrefix = (
builtins.stringLength "/nix/store/zwy7aavnif9ayw30rya1k6xiacafzzl6-");
storePathToName = path:
builtins.substring storePathPrefix (builtins.stringLength path) path;
in (map storePathToName storePaths);
in rec {
# Build Enterprise and call nix-store to retrieve the runtime
# dependencies. The result is available in the nix store.
runtimeDependencies = stdenv.mkDerivation {
name = "runtime-dependencies";
buildInputs = [
# Needed to query the store
nixpkgs.nix
];
unpackPhase = ''
echo "Nothing to unpack"
'';
buildPhase = ''
# Get a list of runtime dependencies
nix-store -q --references ${enterprise} > nix-store-references
'';
installPhase = ''
mkdir -p $out
cp -v nix-store-references $out/
'';
};
# Produce the license overview files.
result = let
# Dependencies according to the nix-store
runtimeDependencyNames = (
storePathsToDrvNames "${runtimeDependencies}/nix-store-references");
# Dependencies based on buildInputs and propagatedBuildInputs
enterpriseAllDependencies = listDrvDependencies enterprise;
enterpriseRuntimeDependencies = let
elemName = element: element.name or "UNNAMED";
isRuntime = element: builtins.elem (elemName element) runtimeDependencyNames;
in builtins.filter isRuntime enterpriseAllDependencies;
# Extract relevant meta information
enterpriseAllLicenses = map drvToMeta enterpriseAllDependencies;
enterpriseRuntimeLicenses = map drvToMeta enterpriseRuntimeDependencies;
in stdenv.mkDerivation {
name = "licenses";
buildInputs = [];
unpackPhase = ''
echo "Nothing to unpack"
'';
buildPhase = ''
mkdir build
# Copy list of runtime dependencies for the Python processor
cp "${runtimeDependencies}/nix-store-references" ./build/nix-store-references
# All licenses which we found by walking buildInputs and
# propagatedBuildInputs
cat > build/all-licenses.json <<EOF
${builtins.toJSON enterpriseAllLicenses}
EOF
# License information for our runtime dependencies only. Basically all
# licenses limited to the items which where also reported by nix-store as
# a dependency.
cat > build/licenses.json <<EOF
${builtins.toJSON enterpriseRuntimeLicenses}
EOF
'';
installPhase = ''
mkdir -p $out
# Store it all, that helps when things go wrong
cp -rv ./build/* $out
'';
};
}