148 lines
3.9 KiB
C++
148 lines
3.9 KiB
C++
#include <map>
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#include <iostream>
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#include "globals.hh"
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#include "shared.hh"
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#include "eval.hh"
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#include "parser.hh"
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#include "get-drvs.hh"
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#include "attr-path.hh"
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#include "value-to-xml.hh"
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#include "util.hh"
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#include "store-api.hh"
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#include "common-opts.hh"
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#include "help.txt.hh"
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using namespace nix;
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void printHelp()
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{
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std::cout << string((char *) helpText, sizeof helpText);
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}
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static Expr * parseStdin(EvalState & state)
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{
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startNest(nest, lvlTalkative, format("parsing standard input"));
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string s, s2;
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while (getline(std::cin, s2)) s += s2 + "\n";
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return parseExprFromString(s, absPath("."));
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}
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static Path gcRoot;
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static int rootNr = 0;
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static bool indirectRoot = false;
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void processExpr(EvalState & state, const Strings & attrPaths,
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bool parseOnly, bool strict, const Bindings & autoArgs,
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bool evalOnly, bool xmlOutput, Expr * e)
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{
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if (parseOnly)
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std::cout << format("%1%\n");
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else
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foreach (Strings::const_iterator, i, attrPaths) {
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Value v;
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findAlongAttrPath(state, *i, autoArgs, e, v);
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state.forceValue(v);
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PathSet context;
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if (evalOnly)
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if (xmlOutput)
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printValueAsXML(state, strict, v, std::cout, context);
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else {
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if (strict) state.strictForceValue(v);
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std::cout << v << std::endl;
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}
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else {
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DrvInfos drvs;
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getDerivations(state, v, "", autoArgs, drvs);
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foreach (DrvInfos::iterator, i, drvs) {
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Path drvPath = i->queryDrvPath(state);
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if (gcRoot == "")
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printGCWarning();
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else
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drvPath = addPermRoot(drvPath,
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makeRootName(gcRoot, rootNr),
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indirectRoot);
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std::cout << format("%1%\n") % drvPath;
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}
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}
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}
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}
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void run(Strings args)
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{
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EvalState state;
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Strings files;
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bool readStdin = false;
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bool evalOnly = false;
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bool parseOnly = false;
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bool xmlOutput = false;
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bool strict = false;
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Strings attrPaths;
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Bindings autoArgs;
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for (Strings::iterator i = args.begin(); i != args.end(); ) {
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string arg = *i++;
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if (arg == "-")
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readStdin = true;
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else if (arg == "--eval-only") {
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readOnlyMode = true;
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evalOnly = true;
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}
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else if (arg == "--parse-only") {
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readOnlyMode = true;
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parseOnly = evalOnly = true;
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}
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else if (arg == "--attr" || arg == "-A") {
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if (i == args.end())
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throw UsageError("`--attr' requires an argument");
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attrPaths.push_back(*i++);
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}
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else if (parseOptionArg(arg, i, args.end(), state, autoArgs))
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;
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else if (arg == "--add-root") {
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if (i == args.end())
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throw UsageError("`--add-root' requires an argument");
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gcRoot = absPath(*i++);
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}
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else if (arg == "--indirect")
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indirectRoot = true;
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else if (arg == "--xml")
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xmlOutput = true;
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else if (arg == "--strict")
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strict = true;
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else if (arg[0] == '-')
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throw UsageError(format("unknown flag `%1%'") % arg);
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else
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files.push_back(arg);
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}
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if (attrPaths.empty()) attrPaths.push_back("");
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store = openStore();
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if (readStdin) {
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Expr * e = parseStdin(state);
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processExpr(state, attrPaths, parseOnly, strict, autoArgs,
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evalOnly, xmlOutput, e);
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}
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foreach (Strings::iterator, i, files) {
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Path path = absPath(*i);
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Expr * e = parseExprFromFile(path);
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processExpr(state, attrPaths, parseOnly, strict, autoArgs,
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evalOnly, xmlOutput, e);
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}
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state.printStats();
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}
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string programId = "nix-instantiate";
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