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