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|
{ lib
, runCommand
, jq
, yq
}:
{ pname ? null
# A list of dependency package names.
, dependencies
# An attribute set of package names to sources.
, dependencySources
}:
let
packages = lib.genAttrs dependencies (dependency: rec {
src = dependencySources.${dependency};
inherit (src) packageRoot;
});
in
(runCommand "${lib.optionalString (pname != null) "${pname}-"}package-config.json" {
inherit packages;
nativeBuildInputs = [ jq yq ];
__structuredAttrs = true;
}) ''
declare -A packageSources
declare -A packageRoots
while IFS=',' read -r name src packageRoot; do
packageSources["$name"]="$src"
packageRoots["$name"]="$packageRoot"
done < <(jq -r '.packages | to_entries | map("\(.key),\(.value.src),\(.value.packageRoot)") | .[]' "$NIX_ATTRS_JSON_FILE")
for package in "''${!packageSources[@]}"; do
if [ ! -e "''${packageSources["$package"]}/''${packageRoots["$package"]}/pubspec.yaml" ]; then
echo >&2 "The package sources for $package are missing. Is the following path inside the source derivation?"
echo >&2 "Source path: ''${packageSources["$package"]}/''${packageRoots["$package"]}/pubspec.yaml"
exit 1
fi
languageConstraint="$(yq -r .environment.sdk "''${packageSources["$package"]}/''${packageRoots["$package"]}/pubspec.yaml")"
if [[ "$languageConstraint" =~ ^[[:space:]]*(\^|>=|>)?[[:space:]]*([[:digit:]]+\.[[:digit:]]+)\.[[:digit:]]+.*$ ]]; then
languageVersionJson="\"''${BASH_REMATCH[2]}\""
elif [ "$languageConstraint" = 'any' ]; then
languageVersionJson='null'
else
# https://github.com/dart-lang/pub/blob/68dc2f547d0a264955c1fa551fa0a0e158046494/lib/src/language_version.dart#L106C35-L106C35
languageVersionJson='"2.7"'
fi
jq --null-input \
--arg name "$package" \
--arg path "''${packageSources["$package"]}/''${packageRoots["$package"]}" \
--argjson languageVersion "$languageVersionJson" \
'{
name: $name,
rootUri: "file://\($path)",
packageUri: "lib/",
languageVersion: $languageVersion,
}'
done | jq > "$out" --slurp '{
configVersion: 2,
generator: "nixpkgs",
packages: .,
}'
''
|