diff options
Diffstat (limited to 'src/libexpr/common-opts.cc')
-rw-r--r-- | src/libexpr/common-opts.cc | 59 |
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..9b3421f6c4bc --- /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++, true); + 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); +} + + +} |