nix-beautify is a tool to indent/format nix based source code and data structures as attrsets and lists.

usage

installation

git clone https://github.com/nixcloud/nix-beautify
cd nix-beautify
nix-env -i nix-beautify -f default.nix

directly

nix-env -i nix-beautify -f https://github.com/nixcloud/nix-beautify/archive/master.tar.gz

usage

cat code.nix | nix-beautify

code.nix

[
{
 fetch = {
 rev = "9831f2c3ac1068a78f50999a30db84270f647af6";
sha256 = "0qxdq599sjwb03znlxy634mdnmfl90770wf1kk37dhzll6i84vkr";
type = "git";
url = "https://github.com/ugorji/go";
};
 goPackagePath = "github.com/ugorji/go";
}
{
 fetch = {
 rev = "d670f9405373e636a5a2765eea47fac0c9bc91a4";
sha256 = "1w1xid51n8v1mydn2m3vgggw8qgpd5a5sr62snsc77d99fpjsrs0";
type = "git";
url = "https://gopkg.in/yaml.v2";
};
 goPackagePath = "gopkg.in/yaml.v2";
}
]

processed output

cat code.nix | nix-beautify
[  
  {
    fetch = {
      rev = "9831f2c3ac1068a78f50999a30db84270f647af6";
      sha256 = "0qxdq599sjwb03znlxy634mdnmfl90770wf1kk37dhzll6i84vkr";
      type = "git";
      url = "https://github.com/ugorji/go";
    };
    goPackagePath = "github.com/ugorji/go";
  }
  {
    fetch = {
      rev = "d670f9405373e636a5a2765eea47fac0c9bc91a4";
      sha256 = "1w1xid51n8v1mydn2m3vgggw8qgpd5a5sr62snsc77d99fpjsrs0";
      type = "git";
      url = "https://gopkg.in/yaml.v2";
    };
    goPackagePath = "gopkg.in/yaml.v2";
  }
]