crystal2nix: Put it into pkgs

pkgs/development/compilers/mint/crystal2nix.cr

@@ -1,42 +0,0 @@
-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("nix-prefetch-git", 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