#include <map> #include <iostream> #include "globals.hh" #include "shared.hh" #include "eval.hh" #include "parser.hh" #include "get-drvs.hh" #include "attr-path.hh" #include "expr-to-xml.hh" #include "util.hh" #include "store-api.hh" #include "help.txt.hh" using namespace nix; void printHelp() { std::cout << string((char *) helpText, sizeof helpText); } static Expr parseStdin(EvalState & state) { startNest(nest, lvlTalkative, format("parsing standard input")); string s, s2; while (getline(std::cin, s2)) s += s2 + "\n"; return parseExprFromString(state, s, absPath(".")); } static Path gcRoot; static int rootNr = 0; static bool indirectRoot = false; static void printResult(EvalState & state, Expr e, bool evalOnly, bool xmlOutput, const ATermMap & autoArgs) { PathSet context; if (evalOnly) if (xmlOutput) printTermAsXML(e, std::cout, context); else std::cout << format("%1%\n") % e; else { DrvInfos drvs; getDerivations(state, e, "", autoArgs, drvs); for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) { Path drvPath = i->queryDrvPath(state); if (gcRoot == "") printGCWarning(); else drvPath = addPermRoot(drvPath, makeRootName(gcRoot, rootNr), indirectRoot); std::cout << format("%1%\n") % drvPath; } } } Expr doEval(EvalState & state, string attrPath, bool parseOnly, bool strict, const ATermMap & autoArgs, Expr e) { e = findAlongAttrPath(state, attrPath, autoArgs, e); if (!parseOnly) if (strict) e = strictEvalExpr(state, e); else e = evalExpr(state, e); return e; } void run(Strings args) { EvalState state; Strings files; bool readStdin = false; bool evalOnly = false; bool parseOnly = false; bool xmlOutput = false; bool strict = false; string attrPath; ATermMap autoArgs(128); for (Strings::iterator i = args.begin(); i != args.end(); ) { string arg = *i++; if (arg == "-") readStdin = true; else if (arg == "--eval-only") { readOnlyMode = true; evalOnly = true; } else if (arg == "--parse-only") { readOnlyMode = true; parseOnly = evalOnly = true; } else if (arg == "--attr" || arg == "-A") { if (i == args.end()) throw UsageError("`--attr' requires an argument"); attrPath = *i++; } else if (arg == "--arg") { if (i == args.end()) throw UsageError("`--arg' requires two arguments"); string name = *i++; if (i == args.end()) throw UsageError("`--arg' requires two arguments"); Expr value = parseExprFromString(state, *i++, absPath(".")); autoArgs.set(toATerm(name), value); } else if (arg == "--add-root") { if (i == args.end()) throw UsageError("`--add-root' requires an argument"); gcRoot = absPath(*i++); } else if (arg == "--indirect") indirectRoot = true; else if (arg == "--xml") xmlOutput = true; else if (arg == "--strict") strict = true; else if (arg[0] == '-') throw UsageError(format("unknown flag `%1%'") % arg); else files.push_back(arg); } store = openStore(); if (readStdin) { Expr e = parseStdin(state); e = doEval(state, attrPath, parseOnly, strict, autoArgs, e); printResult(state, e, evalOnly, xmlOutput, autoArgs); } for (Strings::iterator i = files.begin(); i != files.end(); i++) { Path path = absPath(*i); Expr e = parseExprFromFile(state, path); e = doEval(state, attrPath, parseOnly, strict, autoArgs, e); printResult(state, e, evalOnly, xmlOutput, autoArgs); } printEvalStats(state); } string programId = "nix-instantiate";