1 files changed, 59 insertions, 0 deletions
diff --git a/src/libexpr/common-opts.cc b/src/libexpr/common-opts.cc
new file mode 100644
index 000000000000..0ee889a995ef
--- /dev/null
+++ b/src/libexpr/common-opts.cc
@@ -0,0 +1,59 @@
+#include "common-opts.hh"
+#include "../libmain/shared.hh"
+#include "util.hh"
+
+
+namespace nix {
+
+
+bool parseOptionArg(const string & arg, Strings::iterator & i,
+    const Strings::iterator & argsEnd, EvalState & state,
+    Bindings & autoArgs)
+{
+    if (arg != "--arg" && arg != "--argstr") return false;
+
+    UsageError error(format("`%1%' requires two arguments") % arg);
+    
+    if (i == argsEnd) throw error;
+    string name = *i++;
+    if (i == argsEnd) throw error;
+    string value = *i++;
+
+    /* !!! check for duplicates! */
+    Value * v = state.allocValue();
+    autoArgs.push_back(Attr(state.symbols.create(name), v));
+
+    if (arg == "--arg")
+        state.mkThunk_(*v, state.parseExprFromString(value, absPath(".")));
+    else
+        mkString(*v, value);
+
+    autoArgs.sort(); // !!! inefficient
+
+    return true;
+}
+
+
+bool parseSearchPathArg(const string & arg, Strings::iterator & i,
+    const Strings::iterator & argsEnd, EvalState & state)
+{
+    if (arg != "-I") return false;
+    if (i == argsEnd) throw UsageError(format("`%1%' requires an argument") % arg);;
+    state.addToSearchPath(*i++);
+    return true;
+}
+
+
+Path lookupFileArg(EvalState & state, string s)
+{
+    if (s.size() > 2 && s.at(0) == '<' && s.at(s.size() - 1) == '>') {
+        Path p = s.substr(1, s.size() - 2);
+        Path p2 = state.findFile(p);
+        if (p2 == "") throw Error(format("file `%1%' was not found in the Nix search path (add it using $NIX_PATH or -I)") % p);
+        return p2;
+    } else
+        return absPath(s);
+}
+
+
+}