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nixpkgs/pkgs/development/compilers/crystal/crystal2nix.cr
2019-08-26 18:23:55 +02:00

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Crystal

require "yaml"
require "json"
class PrefetchJSON
JSON.mapping(sha256: String)
end
class ShardLock
YAML.mapping(
version: Float32,
shards: Hash(String, Hash(String, String))
)
end
File.open "shards.nix", "w+" do |file|
file.puts %({)
yaml = ShardLock.from_yaml(File.read("shard.lock"))
yaml.shards.each do |key, value|
owner, repo = value["github"].split("/")
url = "https://github.com/#{value["github"]}"
rev = if value["version"]?
"v#{value["version"]}"
else
value["commit"]
end
sha256 = ""
args = ["--url", url, "--rev", rev]
Process.run("@nixPrefetchGit@", args: args) do |x|
x.error.each_line { |e| puts e }
sha256 = PrefetchJSON.from_json(x.output).sha256
end
file.puts %( #{key} = {)
file.puts %( owner = "#{owner}";)
file.puts %( repo = "#{repo}";)
file.puts %( rev = "#{rev}";)
file.puts %( sha256 = "#{sha256}";)
file.puts %( };)
end
file.puts %(})
end