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function NixOS () {
var env = Components.classes["@mozilla.org/process/environment;1"].
getService(Components.interfaces.nsIEnvironment);
if (env.exists("NIXOS"))
this.nixos = env.get("NIXOS");
if (env.exists("NIXOS_CONFIG"))
this.config = env.get("NIXOS_CONFIG");
if (env.exists("NIXPKGS"))
this.nixpkgs = env.get("NIXPKGS");
if (env.exists("mountPoint"))
this.root = env.get("mountPoint");
if (env.exists("NIXOS_OPTION"))
this.optionBin = env.get("NIXOS_OPTION");
this.option = new Option("options", this, null);
};
NixOS.prototype = {
root: "",
nixos: "/etc/nixos/nixos",
nixpkgs: "/etc/nixos/nixpkgs",
config: "/etc/nixos/configuration.nix",
instantiateBin: "/run/current-system/sw/bin/nix-instantiate",
optionBin: "/run/current-system/sw/bin/nixos-option",
tmpFile: "nixos-gui",
option: null
};
function Option (name, context, parent) {
this.name = name;
this.context_ = context;
if (parent == null)
this.path = "";
else if (parent.path == "")
this.path = name;
else
this.path = parent.path + "." + name;
};
Option.prototype = {
load: function () {
var env = "";
env += "'NIXOS=" + this.context_.root + this.context_.nixos + "' ";
env += "'NIXOS_PKGS=" + this.context_.root + this.context_.nixpkgs + "' ";
env += "'NIXOS_CONFIG=" + this.context_.config + "' ";
var out = makeTempFile(this.context_.tmpFile);
var prog = this.context_.optionBin + " 2>&1 >" + out.path + " ";
var args = " --xml " + this.path;
runProgram(/*env + */ prog + args);
var xml = readFromFile(out);
out.remove(false);
// jQuery does a stack overflow when converting a huge XML to a DOM.
var dom = DOMParser().parseFromString(xml, "text/xml");
var xmlAttrs = $("expr > attrs > attr", dom);
this.isOption = xmlAttrs.first().attr("name") == "_isOption";
if (!this.isOption)
this.loadSubOptions(xmlAttrs);
else
this.loadOption(xmlAttrs);
this.isLoaded = true;
},
loadSubOptions: function (xmlAttrs) {
var cur = this;
var attrs = new Array();
xmlAttrs.each(
function (index) {
var name = $(this).attr("name");
var attr = new Option(name, cur.context_, cur);
attrs.push(attr);
}
);
this.subOptions = attrs;
},
optionAttributeMap: {
_isOption: function (cur, v) { },
value: function (cur, v) { cur.value = xml2nix($(v).children().first()); },
default: function (cur, v) { cur.defaultValue = xml2nix($(v).children().first()); },
example: function (cur, v) { cur.example = xml2nix($(v).children().first()); },
description: function (cur, v) { cur.description = this.string(v); },
typename: function (cur, v) { cur.typename = this.string(v); },
options: function (cur, v) { cur.loadSubOptions($("attrs", v).children()); },
declarations: function (cur, v) { cur.declarations = this.pathList(v); },
definitions: function (cur, v) { cur.definitions = this.pathList(v); },
string: function (v) {
return $(v).children("string").first().attr("value");
},
pathList: function (v) {
var list = [];
$(v).children("list").first().children().each(
function (idx) {
list.push($(this).attr("value"));
}
);
return list;
}
},
loadOption: function (attrs) {
var cur = this;
attrs.each(
function (index) {
var name = $(this).attr("name");
log("loadOption: " + name);
cur.optionAttributeMap[name](cur, this);
}
);
},
// keep the context under which this option has been used.
context_: null,
// name of the option.
name: "",
// result of nixos-option.
value: null,
typename: null,
defaultValue: null,
example: null,
description: "",
declarations: [],
definitions: [],
// path to reach this option
path: "",
// list of options accessible from here.
isLoaded: false,
isOption: false,
subOptions: []
};
var xml2nix_pptable = {
attrs: function (node, depth, pp) {
var children = node.children().not(
function () {
var name = $(this).attr("name");
return name.charAt(0) == "_";
}
);
var c = 0;
var out = "";
out += "{";
depth += 1;
children.each(
function (idx) {
c += 1;
out += pp.indent(depth);
out += pp.dispatch($(this), depth, pp);
}
);
depth -= 1;
if (c > 0)
out += this.indent(depth);
else
out += " ";
out += "}";
return out;
},
list: function (node, depth, pp) {
var children = node.children();
var c = 0;
var out = "";
out += "[";
depth += 1;
children.each(
function (idx) {
c += 1;
out += pp.indent(depth);
out += pp.dispatch($(this), depth, pp);
}
);
depth -= 1;
if (c > 0)
out += this.indent(depth);
else
out += " ";
out += "]";
return out;
},
attr: function (node, depth, pp) {
var name = node.attr("name");
var out = "";
var val = "";
out += name + " = ";
depth += 1;
val = pp.dispatch(node.children().first(), depth, pp);
out += val;
depth -= 1;
out += ";";
return out;
},
string: function (node, depth, pp) {
return "\"" + node.attr("value") + "\"";
},
path: function (node, depth, pp) {
return node.attr("value");
},
bool: function (node, depth, pp) {
return node.attr("value");
},
"int": function (node, depth, pp) {
return node.attr("value");
},
null: function (node, depth, pp) {
return "null";
},
derivation: function (node, depth, pp) {
return "<derivation>";
},
function: function (node, depth, pp) {
return "<function>";
},
unevaluated: function (node, depth, pp) {
return "<unevaluated>";
},
dispatch: function (node, depth, pp) {
for (var key in pp)
{
if(node.is(key))
{
// log(this.indent(depth) + "dispatch: " + key);
var out = pp[key](node, depth, pp);
// log(this.indent(depth) + "dispatch: => " + out);
return out;
}
}
return "<dispatch-error>";
},
indent: function (depth) {
var ret = "\n";
while (depth--)
ret += " ";
return ret;
}
};
function xml2nix(node) {
var depth = 0;
var pp = xml2nix_pptable;
var out = pp.dispatch(node, depth, pp);
// log("pretty:\n" + out);
return out;
}
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