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#include <map>
#include <iostream>
#include "globals.hh"
#include "build.hh"
#include "gc.hh"
#include "shared.hh"
#include "eval.hh"
#include "parser.hh"
#include "nixexpr-ast.hh"
#include "get-drvs.hh"
#include "attr-path.hh"
#include "xml-writer.hh"
#include "help.txt.hh"
void printHelp()
{
cout << string((char *) helpText, sizeof helpText);
}
static Expr parseStdin(EvalState & state)
{
startNest(nest, lvlTalkative, format("parsing standard input"));
string s, s2;
while (getline(cin, s2)) s += s2 + "\n";
return parseExprFromString(state, s, absPath("."));
}
static Path gcRoot;
static int rootNr = 0;
static bool indirectRoot = false;
static XMLAttrs singletonAttrs(const string & name, const string & value)
{
XMLAttrs attrs;
attrs[name] = value;
return attrs;
}
static void printTermAsXML(Expr e, XMLWriter & doc)
{
XMLAttrs attrs;
ATerm s;
int i;
ATermList as, es, formals;
ATerm body, pos;
if (matchStr(e, s))
doc.writeEmptyElement("string", singletonAttrs("value", aterm2String(s)));
else if (matchPath(e, s))
doc.writeEmptyElement("path", singletonAttrs("value", aterm2String(s)));
else if (matchUri(e, s))
doc.writeEmptyElement("uri", singletonAttrs("value", aterm2String(s)));
else if (matchNull(e))
doc.writeEmptyElement("null");
else if (matchInt(e, i))
doc.writeEmptyElement("int", singletonAttrs("value", (format("%1%") % i).str()));
else if (e == eTrue)
doc.writeEmptyElement("bool", singletonAttrs("value", "true"));
else if (e == eFalse)
doc.writeEmptyElement("bool", singletonAttrs("value", "false"));
else if (matchAttrs(e, as)) {
XMLOpenElement _(doc, "attrs");
ATermMap attrs(128);
queryAllAttrs(e, attrs);
StringSet names;
for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i)
names.insert(aterm2String(i->key));
for (StringSet::iterator i = names.begin(); i != names.end(); ++i) {
XMLOpenElement _(doc, "attr", singletonAttrs("name", *i));
printTermAsXML(attrs.get(toATerm(*i)), doc);
}
}
else if (matchList(e, es)) {
XMLOpenElement _(doc, "list");
for (ATermIterator i(es); i; ++i)
printTermAsXML(*i, doc);
}
else if (matchFunction(e, formals, body, pos)) {
XMLOpenElement _(doc, "function");
for (ATermIterator i(formals); i; ++i) {
Expr name; ValidValues valids; ATerm dummy;
if (!matchFormal(*i, name, valids, dummy)) abort();
XMLOpenElement _(doc, "arg", singletonAttrs("name", aterm2String(name)));
ATermList valids2;
if (matchValidValues(valids, valids2)) {
for (ATermIterator j(valids2); j; ++j) {
XMLOpenElement _(doc, "value");
printTermAsXML(*j, doc);
}
}
}
}
else
doc.writeEmptyElement("unevaluated");
}
static void printResult(EvalState & state, Expr e,
bool evalOnly, bool xmlOutput, const ATermMap & autoArgs)
{
if (evalOnly)
if (xmlOutput) {
XMLWriter doc(true, cout);
XMLOpenElement root(doc, "expr");
printTermAsXML(e, doc);
} else
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);
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("."));
printMsg(lvlError, format("X %1% Y %2%") % name % value);
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);
}
openDB();
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";
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