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* `nix-instantiate ... --arg NAME VALUE': allow arguments to be passed

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to functions from the command line.
* nix-build: started removing backticks.
This commit is contained in:
Eelco Dolstra 2006-07-28 16:03:28 +00:00
parent c11839d7b2
commit 4661282fde
8 changed files with 58 additions and 32 deletions
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12
scripts/nix-build.in
View file

@ -77,6 +77,12 @@ EOF
push @instArgs, ("--attr", $ARGV[$n]);
}
elsif ($arg eq "--arg") {
die "$0: `--arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
push @instArgs, ("--arg", $ARGV[$n + 1], $ARGV[$n + 2]);
$n += 2;
}
elsif (substr($arg, 0, 1) eq "-") {
push @buildArgs, $arg;
}
@ -103,8 +109,10 @@ if (!defined $outLink) {
foreach my $expr (@exprs) {
# Instantiate.
my $drvPaths = `@bindir@/nix-instantiate --add-root "$drvLink" --indirect @instArgs "$expr"`;
my @drvPaths = split ' ', $drvPaths;
my @drvPaths;
open DRVPATHS, "-|", "@bindir@/nix-instantiate", "--add-root", $drvLink, "--indirect", @instArgs, $expr;
while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
close DRVPATHS;
foreach my $drvPath (@drvPaths) {
my $target = readlink $drvPath;

2
src/libexpr/attr-path.cc
View file

@ -33,7 +33,7 @@ Expr findAlongAttrPath(EvalState & state, const string & attrPath, Expr e)
if (string2Int(attr, attrIndex)) apType = apIndex;
/* Evaluate the expression. */
e = evalExpr(state, autoCallFunction(evalExpr(state, e)));
e = evalExpr(state, autoCallFunction(evalExpr(state, e), ATermMap(1)));
/* It should evaluate to either an attribute set or an
expression, according to what is specified in the

15
src/libexpr/eval.cc
View file

@ -287,20 +287,27 @@ static ATerm concatStrings(EvalState & state, const ATermVector & args)
}
Expr autoCallFunction(Expr e)
Expr autoCallFunction(Expr e, const ATermMap & args)
{
ATermList formals;
ATerm body, pos;
if (matchFunction(e, formals, body, pos)) {
ATermMap actualArgs(128);
for (ATermIterator i(formals); i; ++i) {
Expr name, def; ATerm values, def2;
Expr name, def, value; ATerm values, def2;
if (!matchFormal(*i, name, values, def2)) abort();
if (!matchDefaultValue(def2, def))
if ((value = args.get(name)))
actualArgs.set(name, makeAttrRHS(value, makeNoPos()));
else if (!matchDefaultValue(def2, def))
throw TypeError(format("cannot auto-call a function that has an argument without a default value (`%1%')")
% aterm2String(name));
}
e = makeCall(e, makeAttrs(ATermMap(0)));
e = makeCall(e, makeAttrs(actualArgs));
}
return e;
}

6
src/libexpr/eval.hh
View file

@ -60,9 +60,9 @@ string coerceToStringWithContext(EvalState & state,
Expr wrapInContext(ATermList context, Expr e);
/* Automatically call a function for which each argument has a default
value. Note: result is a call, not a normal form; it should be
evaluated by calling evalExpr(). */
Expr autoCallFunction(Expr e);
value or has a binding in the `args' map. Note: result is a call,
not a normal form; it should be evaluated by calling evalExpr(). */
Expr autoCallFunction(Expr e, const ATermMap & args);
/* Print statistics. */
void printEvalStats(EvalState & state);

13
src/libexpr/get-drvs.cc
View file

@ -121,9 +121,10 @@ static string addToPath(const string & s1, const string & s2)
static void getDerivations(EvalState & state, Expr e,
const string & pathPrefix, DrvInfos & drvs, Exprs & doneExprs)
const string & pathPrefix, const ATermMap & autoArgs,
DrvInfos & drvs, Exprs & doneExprs)
{
e = evalExpr(state, autoCallFunction(evalExpr(state, e)));
e = evalExpr(state, autoCallFunction(evalExpr(state, e), autoArgs));
/* Process the expression. */
ATermList es;
@ -152,7 +153,7 @@ static void getDerivations(EvalState & state, Expr e,
queryAllAttrs(e, attrs, false);
Expr e2 = attrs.get(toATerm("recurseForDerivations"));
if (e2 && evalBool(state, e2))
getDerivations(state, e, pathPrefix2, drvs, doneExprs);
getDerivations(state, e, pathPrefix2, autoArgs, drvs, doneExprs);
}
}
}
@ -167,7 +168,7 @@ static void getDerivations(EvalState & state, Expr e,
format("evaluating list element"));
string pathPrefix2 = addToPath(pathPrefix, (format("%1%") % n).str());
if (getDerivation(state, *i, pathPrefix2, drvs, doneExprs))
getDerivations(state, *i, pathPrefix2, drvs, doneExprs);
getDerivations(state, *i, pathPrefix2, autoArgs, drvs, doneExprs);
}
return;
}
@ -177,8 +178,8 @@ static void getDerivations(EvalState & state, Expr e,
void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
DrvInfos & drvs)
const ATermMap & autoArgs, DrvInfos & drvs)
{
Exprs doneExprs;
getDerivations(state, e, pathPrefix, drvs, doneExprs);
getDerivations(state, e, pathPrefix, autoArgs, drvs, doneExprs);
}

2
src/libexpr/get-drvs.hh
View file

@ -50,7 +50,7 @@ typedef list<DrvInfo> DrvInfos;
bool getDerivation(EvalState & state, Expr e, DrvInfo & drv);
void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
DrvInfos & drvs);
const ATermMap & autoArgs, DrvInfos & drvs);
#endif /* !__GET_DRVS_H */

8
src/nix-env/main.cc
View file

@ -65,7 +65,7 @@ static void loadDerivations(EvalState & state, Path nixExprPath,
string systemFilter, DrvInfos & elems)
{
getDerivations(state,
parseExprFromFile(state, absPath(nixExprPath)), "", elems);
parseExprFromFile(state, absPath(nixExprPath)), "", ATermMap(1), elems);
/* Filter out all derivations not applicable to the current
system. */
@ -119,7 +119,7 @@ static DrvInfos queryInstalled(EvalState & state, const Path & userEnv)
e = bottomupRewrite(addPos, e);
DrvInfos elems;
getDerivations(state, e, "", elems);
getDerivations(state, e, "", ATermMap(1), elems);
return elems;
}
@ -334,7 +334,7 @@ static void queryInstSources(EvalState & state,
{
Expr e2 = parseExprFromString(state, *i, absPath("."));
Expr call = makeCall(e2, e1);
getDerivations(state, call, "", elems);
getDerivations(state, call, "", ATermMap(1), elems);
}
break;
@ -390,7 +390,7 @@ static void queryInstSources(EvalState & state,
getDerivations(state,
findAlongAttrPath(state, *i,
parseExprFromFile(state, instSource.nixExprPath)),
"", elems);
"", ATermMap(1), elems);
break;
}
}

32
src/nix-instantiate/main.cc
View file

@ -34,7 +34,7 @@ static bool indirectRoot = false;
static void printResult(EvalState & state, Expr e,
bool evalOnly, bool printArgs)
bool evalOnly, bool printArgs, const ATermMap & autoArgs)
{
if (evalOnly)
cout << format("%1%\n") % e;
@ -62,7 +62,7 @@ static void printResult(EvalState & state, Expr e,
else {
DrvInfos drvs;
getDerivations(state, e, "", drvs);
getDerivations(state, e, "", autoArgs, drvs);
for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) {
Path drvPath = i->queryDrvPath(state);
if (gcRoot == "")
@ -86,6 +86,7 @@ void run(Strings args)
bool parseOnly = false;
bool printArgs = false;
string attrPath;
ATermMap autoArgs(128);
for (Strings::iterator i = args.begin();
i != args.end(); )
@ -106,20 +107,29 @@ void run(Strings args)
readOnlyMode = true;
printArgs = true;
}
else if (arg == "--add-root") {
if (i == args.end())
throw UsageError("`--add-root requires an argument");
gcRoot = absPath(*i++);
}
else if (arg == "--attr" || arg == "-A") {
if (i == args.end())
throw UsageError("`--attr requires an argument");
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[0] == '-')
throw UsageError(format("unknown flag `%1%`") % arg);
throw UsageError(format("unknown flag `%1%'") % arg);
else
files.push_back(arg);
}
@ -129,7 +139,7 @@ void run(Strings args)
if (readStdin) {
Expr e = findAlongAttrPath(state, attrPath, parseStdin(state));
if (!parseOnly) e = evalExpr(state, e);
printResult(state, e, evalOnly, printArgs);
printResult(state, e, evalOnly, printArgs, autoArgs);
}
for (Strings::iterator i = files.begin();
@ -139,7 +149,7 @@ void run(Strings args)
Expr e = findAlongAttrPath(state, attrPath,
parseExprFromFile(state, path));
if (!parseOnly) e = evalExpr(state, e);
printResult(state, e, evalOnly, printArgs);
printResult(state, e, evalOnly, printArgs, autoArgs);
}
printEvalStats(state);