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#include <map>
#include <iostream>
#include "globals.hh"
#include "normalise.hh"
#include "shared.hh"
#include "expr.hh"
#include "eval.hh"
#if 0
static Path searchPath(const Paths & searchDirs, const Path & relPath)
{
if (string(relPath, 0, 1) == "/") return relPath;
for (Paths::const_iterator i = searchDirs.begin();
i != searchDirs.end(); i++)
{
Path path = *i + "/" + relPath;
if (pathExists(path)) return path;
}
throw Error(
format("path `%1%' not found in any of the search directories")
% relPath);
}
#endif
#if 0
static Expr evalExpr2(EvalState & state, Expr e)
{
/* Conditional. */
if (ATmatch(e, "If(<term>, <term>, <term>)", &e1, &e2, &e3)) {
e1 = evalExpr(state, e1);
Expr x;
if (ATmatch(e1, "True")) x = e2;
else if (ATmatch(e1, "False")) x = e3;
else throw badTerm("expecting a boolean", e1);
return evalExpr(state, x);
}
/* Ad-hoc function for string matching. */
if (ATmatch(e, "HasSubstr(<term>, <term>)", &e1, &e2)) {
e1 = evalExpr(state, e1);
e2 = evalExpr(state, e2);
char * s1, * s2;
if (!ATmatch(e1, "<str>", &s1))
throw badTerm("expecting a string", e1);
if (!ATmatch(e2, "<str>", &s2))
throw badTerm("expecting a string", e2);
return
string(s1).find(string(s2)) != string::npos ?
ATmake("True") : ATmake("False");
}
/* BaseName primitive function. */
if (ATmatch(e, "BaseName(<term>)", &e1)) {
e1 = evalExpr(state, e1);
if (!ATmatch(e1, "<str>", &s1))
throw badTerm("string expected", e1);
return ATmake("<str>", baseNameOf(s1).c_str());
}
}
#endif
static Expr evalStdin(EvalState & state)
{
Nest nest(lvlTalkative, format("evaluating standard input"));
Expr e = ATreadFromFile(stdin);
if (!e)
throw Error(format("unable to read a term from stdin"));
return evalExpr(state, e);
}
static void printNixExpr(EvalState & state, Expr e)
{
ATermList es;
if (ATmatch(e, "Attrs([<list>])", &es)) {
Expr a = queryAttr(e, "type");
if (a && evalString(state, a) == "derivation") {
a = queryAttr(e, "drvPath");
if (a) {
cout << format("%1%\n") % evalPath(state, a);
return;
}
}
}
if (ATmatch(e, "[<list>]", &es)) {
while (!ATisEmpty(es)) {
printNixExpr(state, evalExpr(state, ATgetFirst(es)));
es = ATgetNext(es);
}
return;
}
throw badTerm("top level does not evaluate to one or more Nix expressions", e);
}
void run(Strings args)
{
EvalState state;
Strings files;
bool readStdin = false;
#if 0
state.searchDirs.push_back(".");
state.searchDirs.push_back(nixDataDir + "/fix");
#endif
for (Strings::iterator it = args.begin();
it != args.end(); )
{
string arg = *it++;
#if 0
if (arg == "--includedir" || arg == "-I") {
if (it == args.end())
throw UsageError(format("argument required in `%1%'") % arg);
state.searchDirs.push_back(*it++);
}
else
#endif
if (arg == "--verbose" || arg == "-v")
verbosity = (Verbosity) ((int) verbosity + 1);
else if (arg == "-")
readStdin = true;
else if (arg[0] == '-')
throw UsageError(format("unknown flag `%1%`") % arg);
else
files.push_back(arg);
}
openDB();
if (readStdin) {
Expr e = evalStdin(state);
printNixExpr(state, e);
}
for (Strings::iterator it = files.begin();
it != files.end(); it++)
{
Expr e = evalFile(state, absPath(*it));
printNixExpr(state, e);
}
printEvalStats(state);
}
string programId = "fix";
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