Created
June 10, 2020 14:42
Fetch Crystal dependencies on the lfy
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{ pkgs ? import ./nix { } }: | |
let | |
inherit (builtins) fromJSON readFile toFile elemAt split mapAttrs; | |
inherit (pkgs) | |
crystal runCommand stdenv lib coreutils inclusive pkgconfig openssl; | |
inherit (pkgs.lib) makeBinPath; | |
shardLock2JSON = shardLockFile: | |
runCommand "yaml2json" { buildInputs = [ crystal ]; } '' | |
crystal eval <<-EOF > $out | |
require "json" | |
require "yaml" | |
puts YAML.parse(File.read("${shardLockFile}")).to_json | |
EOF | |
''; | |
fetchShards = shardLockFile: | |
mapAttrs (name: value: | |
let | |
parts = split "\\+git\\.commit\\." value.version; | |
version = elemAt parts 0; | |
rev = elemAt parts 2; | |
in fetchGit { | |
url = value.git; | |
rev = rev; | |
}) (fromJSON (readFile (shardLock2JSON shardLockFile))).shards; | |
shardsDir = shardLockFile: | |
stdenv.mkDerivation { | |
name = "shard-libs"; | |
__structuredAttrs = true; | |
preferLocalBuild = true; | |
PATH = lib.makeBinPath [ coreutils ]; | |
shards = fetchShards shardLockFile; | |
builder = toFile "builder" '' | |
. .attrs.sh | |
out=''${outputs[out]} | |
mkdir $out | |
for name in "''${!shards[@]}"; do | |
echo "Linking shard $name ..." | |
ln -s "''${shards[$name]}" "$out/$name" | |
done | |
''; | |
}; | |
in crystal.buildCrystalPackage { | |
pname = "example"; | |
version = "0.1.0"; | |
format = "crystal"; | |
buildInputs = [ pkgconfig openssl ]; | |
src = inclusive ./. [ ./src ]; | |
preConfigure = '' | |
ln -s ${shardsDir ./shard.lock} lib | |
''; | |
crystalBinaries.example.src = "src/example.cr"; | |
} |
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