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#include "globals.hh"
#include "shared.hh"
#include "eval.hh"
#include "eval-inline.hh"
#include "get-drvs.hh"
#include "attr-path.hh"
#include "value-to-xml.hh"
#include "value-to-json.hh"
#include "util.hh"
#include "store-api.hh"
#include "common-opts.hh"
#include "misc.hh"
#include <map>
#include <iostream>
enum OutputKind {
OUTPUT_PLAIN,
OUTPUT_XML,
OUTPUT_JSON,
};
using namespace nix;
void printHelp()
{
showManPage("nix-instantiate");
}
static Expr * parseStdin(EvalState & state)
{
startNest(nest, lvlTalkative, format("parsing standard input"));
return state.parseExprFromString(drainFD(0), absPath("."));
}
static Path gcRoot;
static int rootNr = 0;
static bool indirectRoot = false;
void processExpr(EvalState & state, const Strings & attrPaths,
bool parseOnly, bool strict, Bindings & autoArgs,
bool evalOnly, OutputKind output, bool location, Expr * e)
{
if (parseOnly) {
std::cout << format("%1%\n") % *e;
return;
}
Value vRoot;
state.eval(e, vRoot);
foreach (Strings::const_iterator, i, attrPaths) {
Value & v(*findAlongAttrPath(state, *i, autoArgs, vRoot));
state.forceValue(v);
PathSet context;
if (evalOnly) {
Value vRes;
if (autoArgs.empty())
vRes = v;
else
state.autoCallFunction(autoArgs, v, vRes);
if (output == OUTPUT_XML)
printValueAsXML(state, strict, location, vRes, std::cout, context);
else if (output == OUTPUT_JSON)
printValueAsJSON(state, strict, vRes, std::cout, context);
else {
if (strict) state.strictForceValue(vRes);
std::cout << vRes << std::endl;
}
} else {
DrvInfos drvs;
getDerivations(state, v, "", autoArgs, drvs, false);
foreach (DrvInfos::iterator, i, drvs) {
Path drvPath = i->queryDrvPath();
/* What output do we want? */
string outputName = i->queryOutputName();
if (outputName == "")
throw Error(format("derivation `%1%' lacks an `outputName' attribute ") % drvPath);
if (gcRoot == "")
printGCWarning();
else {
Path rootName = gcRoot;
if (++rootNr > 1) rootName += "-" + int2String(rootNr);
drvPath = addPermRoot(*store, drvPath, rootName, indirectRoot);
}
std::cout << format("%1%%2%\n") % drvPath % (outputName != "out" ? "!" + outputName : "");
}
}
}
}
void run(Strings args)
{
/* FIXME: hack. */
Strings searchPath;
Strings args2;
for (Strings::iterator i = args.begin(); i != args.end(); ) {
string arg = *i++;
if (!parseSearchPathArg(arg, i, args.end(), searchPath))
args2.push_back(arg);
}
args = args2;
EvalState state(searchPath);
Strings files;
bool readStdin = false;
bool fromArgs = false;
bool findFile = false;
bool evalOnly = false;
bool parseOnly = false;
OutputKind outputKind = OUTPUT_PLAIN;
bool xmlOutputSourceLocation = true;
bool strict = false;
Strings attrPaths;
Bindings autoArgs;
bool wantsReadWrite = false;
for (Strings::iterator i = args.begin(); i != args.end(); ) {
string arg = *i++;
if (arg == "-")
readStdin = true;
else if (arg == "--expr" || arg == "-E")
fromArgs = true;
else if (arg == "--eval" || arg == "--eval-only")
evalOnly = true;
else if (arg == "--read-write-mode")
wantsReadWrite = true;
else if (arg == "--parse" || arg == "--parse-only")
parseOnly = evalOnly = true;
else if (arg == "--find-file")
findFile = true;
else if (arg == "--attr" || arg == "-A") {
if (i == args.end())
throw UsageError("`--attr' requires an argument");
attrPaths.push_back(*i++);
}
else if (parseOptionArg(arg, i, args.end(), state, autoArgs))
;
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")
outputKind = OUTPUT_XML;
else if (arg == "--json")
outputKind = OUTPUT_JSON;
else if (arg == "--no-location")
xmlOutputSourceLocation = false;
else if (arg == "--strict")
strict = true;
else if (arg == "--repair")
state.repair = true;
else if (arg == "--dry-run")
settings.readOnlyMode = true;
else if (arg[0] == '-')
throw UsageError(format("unknown flag `%1%'") % arg);
else
files.push_back(arg);
}
if (evalOnly && !wantsReadWrite)
settings.readOnlyMode = true;
if (attrPaths.empty()) attrPaths.push_back("");
if (findFile) {
foreach (Strings::iterator, i, files) {
Path p = state.findFile(*i);
if (p == "") throw Error(format("unable to find `%1%'") % *i);
std::cout << p << std::endl;
}
return;
}
store = openStore();
if (readStdin) {
Expr * e = parseStdin(state);
processExpr(state, attrPaths, parseOnly, strict, autoArgs,
evalOnly, outputKind, xmlOutputSourceLocation, e);
} else if (files.empty() && !fromArgs)
files.push_back("./default.nix");
foreach (Strings::iterator, i, files) {
Expr * e = fromArgs
? state.parseExprFromString(*i, absPath("."))
: state.parseExprFromFile(resolveExprPath(lookupFileArg(state, *i)));
processExpr(state, attrPaths, parseOnly, strict, autoArgs,
evalOnly, outputKind, xmlOutputSourceLocation, e);
}
state.printStats();
}
string programId = "nix-instantiate";
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