forked from lix-project/lix
* Refactoring: get the selection path stuff out of getDerivations()
and put it into a separate function findAlongAttrPath().
This commit is contained in:
parent
2317d8f671
commit
ca2238cf81
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@ -3,7 +3,8 @@ lib_LTLIBRARIES = libexpr.la
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libexpr_la_SOURCES = nixexpr.cc nixexpr.hh parser.cc parser.hh \
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libexpr_la_SOURCES = nixexpr.cc nixexpr.hh parser.cc parser.hh \
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eval.cc eval.hh primops.cc \
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eval.cc eval.hh primops.cc \
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lexer-tab.c lexer-tab.h parser-tab.c parser-tab.h \
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lexer-tab.c lexer-tab.h parser-tab.c parser-tab.h \
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get-drvs.cc get-drvs.hh
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get-drvs.cc get-drvs.hh \
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attr-path.cc attr-path.hh
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BUILT_SOURCES = nixexpr-ast.cc nixexpr-ast.hh \
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BUILT_SOURCES = nixexpr-ast.cc nixexpr-ast.hh \
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parser-tab.h lexer-tab.h parser-tab.c lexer-tab.c
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parser-tab.h lexer-tab.h parser-tab.c lexer-tab.c
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74
src/libexpr/attr-path.cc
Normal file
74
src/libexpr/attr-path.cc
Normal file
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@ -0,0 +1,74 @@
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#include "attr-path.hh"
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#include "nixexpr-ast.hh"
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bool isAttrs(EvalState & state, Expr e, ATermMap & attrs)
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{
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e = evalExpr(state, e);
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ATermList dummy;
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if (!matchAttrs(e, dummy)) return false;
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queryAllAttrs(e, attrs, false);
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return true;
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}
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Expr findAlongAttrPath(EvalState & state, const string & attrPath, Expr e)
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{
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Strings tokens = tokenizeString(attrPath, ".");
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Error attrError =
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Error(format("attribute selection path `%1%' does not match expression") % attrPath);
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string curPath;
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for (Strings::iterator i = tokens.begin(); i != tokens.end(); ++i) {
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if (!curPath.empty()) curPath += ".";
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curPath += *i;
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/* Is *i an index (integer) or a normal attribute name? */
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enum { apAttr, apIndex } apType = apAttr;
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string attr = *i;
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int attrIndex = -1;
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if (string2Int(attr, attrIndex)) apType = apIndex;
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/* Evaluate the expression. */
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e = evalExpr(state, autoCallFunction(evalExpr(state, e)));
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/* It should evaluate to either an attribute set or an
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expression, according to what is specified in the
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attrPath. */
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if (apType == apAttr) {
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ATermMap attrs(128);
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if (!isAttrs(state, e, attrs))
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throw TypeError(
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format("the expression selected by the selection path `%1%' should be an attribute set but is %2%")
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% curPath % showType(e));
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e = attrs.get(toATerm(attr));
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if (!e)
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throw Error(format("attribute `%1%' in selection path `%2%' not found") % attr % curPath);
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}
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else if (apType == apIndex) {
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ATermList es;
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if (!matchList(e, es))
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throw TypeError(
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format("the expression selected by the selection path `%1%' should be a list but is %2%")
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% curPath % showType(e));
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e = ATelementAt(es, attrIndex);
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if (!e)
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throw Error(format("list index %1% in selection path `%2%' not found") % attrIndex % curPath);
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}
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}
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return e;
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}
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13
src/libexpr/attr-path.hh
Normal file
13
src/libexpr/attr-path.hh
Normal file
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@ -0,0 +1,13 @@
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#ifndef __ATTR_PATH_H
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#define __ATTR_PATH_H
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#include <string>
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#include <map>
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#include "eval.hh"
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Expr findAlongAttrPath(EvalState & state, const string & attrPath, Expr e);
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#endif /* !__ATTR_PATH_H */
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@ -287,6 +287,24 @@ static ATerm concatStrings(EvalState & state, const ATermVector & args)
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}
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}
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Expr autoCallFunction(Expr e)
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{
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ATermList formals;
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ATerm body, pos;
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if (matchFunction(e, formals, body, pos)) {
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for (ATermIterator i(formals); i; ++i) {
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Expr name, def; ATerm values, def2;
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if (!matchFormal(*i, name, values, def2)) abort();
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if (!matchDefaultValue(def2, def))
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throw TypeError(format("cannot auto-call a function that has an argument without a default value (`%1%')")
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% aterm2String(name));
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}
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e = makeCall(e, makeAttrs(ATermMap(0)));
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}
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return e;
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}
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Expr evalExpr2(EvalState & state, Expr e)
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Expr evalExpr2(EvalState & state, Expr e)
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{
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{
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Expr e1, e2, e3, e4;
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Expr e1, e2, e3, e4;
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@ -380,7 +398,9 @@ Expr evalExpr2(EvalState & state, Expr e)
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}
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}
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}
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}
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else throw TypeError("the left-hand side of the function call is neither a function nor a primop (built-in operation)");
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else throw TypeError(
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format("the left-hand side of the function call is neither a function nor a primop (built-in operation) but %1%")
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% showType(e1));
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}
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}
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/* Attribute selection. */
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/* Attribute selection. */
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@ -59,6 +59,11 @@ string coerceToStringWithContext(EvalState & state,
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ATermList & context, Expr e, bool & isPath);
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ATermList & context, Expr e, bool & isPath);
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Expr wrapInContext(ATermList context, Expr e);
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Expr wrapInContext(ATermList context, Expr e);
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/* Automatically call a function for which each argument has a default
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value. Note: result is a call, not a normal form; it should be
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evaluated by calling evalExpr(). */
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Expr autoCallFunction(Expr e);
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/* Print statistics. */
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/* Print statistics. */
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void printEvalStats(EvalState & state);
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void printEvalStats(EvalState & state);
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@ -58,7 +58,7 @@ typedef set<Expr> Exprs;
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it makes sense for the caller to recursively search for derivations
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it makes sense for the caller to recursively search for derivations
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in `e'. */
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in `e'. */
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static bool getDerivation(EvalState & state, Expr e,
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static bool getDerivation(EvalState & state, Expr e,
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DrvInfos & drvs, Exprs & doneExprs, string attributeName)
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const string & attrPath, DrvInfos & drvs, Exprs & doneExprs)
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{
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{
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try {
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try {
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@ -92,7 +92,7 @@ static bool getDerivation(EvalState & state, Expr e,
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drv.attrs = attrs;
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drv.attrs = attrs;
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drv.attrPath = attributeName;
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drv.attrPath = attrPath;
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drvs.push_back(drv);
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drvs.push_back(drv);
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return false;
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return false;
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@ -107,7 +107,7 @@ bool getDerivation(EvalState & state, Expr e, DrvInfo & drv)
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{
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{
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Exprs doneExprs;
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Exprs doneExprs;
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DrvInfos drvs;
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DrvInfos drvs;
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getDerivation(state, e, drvs, doneExprs, "");
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getDerivation(state, e, "", drvs, doneExprs);
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if (drvs.size() != 1) return false;
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if (drvs.size() != 1) return false;
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drv = drvs.front();
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drv = drvs.front();
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return true;
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return true;
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@ -121,74 +121,29 @@ static string addToPath(const string & s1, const string & s2)
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static void getDerivations(EvalState & state, Expr e,
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static void getDerivations(EvalState & state, Expr e,
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DrvInfos & drvs, Exprs & doneExprs, const string & attrPath,
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const string & pathPrefix, DrvInfos & drvs, Exprs & doneExprs)
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const string & pathTaken)
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{
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{
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/* Automatically call functions for which each argument has a
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e = evalExpr(state, autoCallFunction(evalExpr(state, e)));
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default value. */
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ATermList formals;
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ATerm body, pos;
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if (matchFunction(e, formals, body, pos)) {
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for (ATermIterator i(formals); i; ++i) {
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Expr name, def; ATerm values, def2;
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if (!matchFormal(*i, name, values, def2)) abort();
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if (!matchDefaultValue(def2, def))
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throw TypeError(format("cannot auto-call a function that has an argument without a default value (`%1%')")
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% aterm2String(name));
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}
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getDerivations(state,
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makeCall(e, makeAttrs(ATermMap(0))),
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drvs, doneExprs, attrPath, pathTaken);
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return;
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}
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/* Parse the start of attrPath. */
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enum { apNone, apAttr, apIndex } apType;
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string attrPathRest;
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string attr;
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int attrIndex;
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Error attrError =
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Error(format("attribute selection path `%1%' does not match expression") % attrPath);
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if (attrPath.empty())
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apType = apNone;
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else {
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string::size_type dot = attrPath.find(".");
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if (dot == string::npos) {
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attrPathRest = "";
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attr = attrPath;
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} else {
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attrPathRest = string(attrPath, dot + 1);
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attr = string(attrPath, 0, dot);
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}
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apType = apAttr;
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if (string2Int(attr, attrIndex)) apType = apIndex;
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}
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/* Process the expression. */
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/* Process the expression. */
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ATermList es;
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ATermList es;
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DrvInfo drv;
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DrvInfo drv;
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if (!getDerivation(state, e, drvs, doneExprs, pathTaken)) {
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if (!getDerivation(state, e, pathPrefix, drvs, doneExprs))
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if (apType != apNone) throw attrError;
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return;
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return;
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}
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e = evalExpr(state, e);
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if (matchAttrs(e, es)) {
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if (matchAttrs(e, es)) {
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if (apType != apNone && apType != apAttr) throw attrError;
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ATermMap drvMap(ATgetLength(es));
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ATermMap drvMap(ATgetLength(es));
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queryAllAttrs(e, drvMap);
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queryAllAttrs(e, drvMap);
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if (apType == apNone) {
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for (ATermMap::const_iterator i = drvMap.begin(); i != drvMap.end(); ++i) {
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for (ATermMap::const_iterator i = drvMap.begin(); i != drvMap.end(); ++i) {
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startNest(nest, lvlDebug,
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startNest(nest, lvlDebug,
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format("evaluating attribute `%1%'") % aterm2String(i->key));
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format("evaluating attribute `%1%'") % aterm2String(i->key));
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string pathTaken2 = addToPath(pathTaken, aterm2String(i->key));
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string pathPrefix2 = addToPath(pathPrefix, aterm2String(i->key));
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if (getDerivation(state, i->value, drvs, doneExprs, pathTaken2)) {
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if (getDerivation(state, i->value, pathPrefix2, drvs, doneExprs)) {
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/* If the value of this attribute is itself an
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/* If the value of this attribute is itself an
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attribute set, should we recurse into it?
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attribute set, should we recurse into it? => Only
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=> Only if it has a `recurseForDerivations = true'
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if it has a `recurseForDerivations = true'
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attribute. */
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attribute. */
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ATermList es;
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ATermList es;
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Expr e = evalExpr(state, i->value);
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Expr e = evalExpr(state, i->value);
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@ -197,42 +152,22 @@ static void getDerivations(EvalState & state, Expr e,
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queryAllAttrs(e, attrs, false);
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queryAllAttrs(e, attrs, false);
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Expr e2 = attrs.get(toATerm("recurseForDerivations"));
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Expr e2 = attrs.get(toATerm("recurseForDerivations"));
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if (e2 && evalBool(state, e2))
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if (e2 && evalBool(state, e2))
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getDerivations(state, e, drvs, doneExprs, attrPathRest, pathTaken2);
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getDerivations(state, e, pathPrefix2, drvs, doneExprs);
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}
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}
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}
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}
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}
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}
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} else {
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Expr e2 = drvMap.get(toATerm(attr));
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if (!e2) throw Error(format("attribute `%1%' in selection path not found") % attr);
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startNest(nest, lvlDebug,
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format("evaluating attribute `%1%'") % attr);
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string pathTaken2 = addToPath(pathTaken, attr);
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getDerivation(state, e2, drvs, doneExprs, pathTaken2);
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if (!attrPath.empty())
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getDerivations(state, e2, drvs, doneExprs, attrPathRest, pathTaken2);
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}
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return;
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return;
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}
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}
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if (matchList(e, es)) {
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if (matchList(e, es)) {
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if (apType != apNone && apType != apIndex) throw attrError;
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if (apType == apNone) {
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int n = 0;
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int n = 0;
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for (ATermIterator i(es); i; ++i, ++n) {
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for (ATermIterator i(es); i; ++i, ++n) {
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startNest(nest, lvlDebug,
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startNest(nest, lvlDebug,
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format("evaluating list element"));
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format("evaluating list element"));
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string pathTaken2 = addToPath(pathTaken, (format("%1%") % n).str());
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string pathPrefix2 = addToPath(pathPrefix, (format("%1%") % n).str());
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if (getDerivation(state, *i, drvs, doneExprs, pathTaken2))
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if (getDerivation(state, *i, pathPrefix2, drvs, doneExprs))
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getDerivations(state, *i, drvs, doneExprs, attrPathRest, pathTaken2);
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getDerivations(state, *i, pathPrefix2, drvs, doneExprs);
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}
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} else {
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Expr e2 = ATelementAt(es, attrIndex);
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if (!e2) throw Error(format("list index %1% in selection path not found") % attrIndex);
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startNest(nest, lvlDebug,
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format("evaluating list element"));
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string pathTaken2 = addToPath(pathTaken, (format("%1%") % attrIndex).str());
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if (getDerivation(state, e2, drvs, doneExprs, pathTaken2))
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getDerivations(state, e2, drvs, doneExprs, attrPathRest, pathTaken2);
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}
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}
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return;
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return;
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}
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}
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@ -241,9 +176,9 @@ static void getDerivations(EvalState & state, Expr e,
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}
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}
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void getDerivations(EvalState & state, Expr e, DrvInfos & drvs,
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void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
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const string & attrPath)
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DrvInfos & drvs)
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{
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{
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Exprs doneExprs;
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Exprs doneExprs;
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getDerivations(state, e, drvs, doneExprs, attrPath, "");
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getDerivations(state, e, pathPrefix, drvs, doneExprs);
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}
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}
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@ -49,8 +49,8 @@ typedef list<DrvInfo> DrvInfos;
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Otherwise, return false. */
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Otherwise, return false. */
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bool getDerivation(EvalState & state, Expr e, DrvInfo & drv);
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bool getDerivation(EvalState & state, Expr e, DrvInfo & drv);
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void getDerivations(EvalState & state, Expr e, DrvInfos & drvs,
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void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
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const string & attrPath = "");
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DrvInfos & drvs);
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#endif /* !__GET_DRVS_H */
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#endif /* !__GET_DRVS_H */
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@ -10,6 +10,7 @@
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#include "help.txt.hh"
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#include "help.txt.hh"
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#include "nixexpr-ast.hh"
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#include "nixexpr-ast.hh"
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#include "get-drvs.hh"
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#include "get-drvs.hh"
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#include "attr-path.hh"
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#include "pathlocks.hh"
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#include "pathlocks.hh"
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#include <cerrno>
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#include <cerrno>
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@ -36,7 +37,6 @@ struct InstallSourceInfo
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||||||
Path nixExprPath; /* for srcNixExprDrvs, srcNixExprs */
|
Path nixExprPath; /* for srcNixExprDrvs, srcNixExprs */
|
||||||
Path profile; /* for srcProfile */
|
Path profile; /* for srcProfile */
|
||||||
string systemFilter; /* for srcNixExprDrvs */
|
string systemFilter; /* for srcNixExprDrvs */
|
||||||
string attrPath; /* srcAttrPath */
|
|
||||||
};
|
};
|
||||||
|
|
||||||
|
|
||||||
|
@ -65,7 +65,7 @@ static void loadDerivations(EvalState & state, Path nixExprPath,
|
||||||
string systemFilter, DrvInfos & elems)
|
string systemFilter, DrvInfos & elems)
|
||||||
{
|
{
|
||||||
getDerivations(state,
|
getDerivations(state,
|
||||||
parseExprFromFile(state, absPath(nixExprPath)), elems);
|
parseExprFromFile(state, absPath(nixExprPath)), "", elems);
|
||||||
|
|
||||||
/* Filter out all derivations not applicable to the current
|
/* Filter out all derivations not applicable to the current
|
||||||
system. */
|
system. */
|
||||||
|
@ -119,7 +119,7 @@ static DrvInfos queryInstalled(EvalState & state, const Path & userEnv)
|
||||||
e = bottomupRewrite(addPos, e);
|
e = bottomupRewrite(addPos, e);
|
||||||
|
|
||||||
DrvInfos elems;
|
DrvInfos elems;
|
||||||
getDerivations(state, e, elems);
|
getDerivations(state, e, "", elems);
|
||||||
return elems;
|
return elems;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -334,7 +334,7 @@ static void queryInstSources(EvalState & state,
|
||||||
{
|
{
|
||||||
Expr e2 = parseExprFromString(state, *i, absPath("."));
|
Expr e2 = parseExprFromString(state, *i, absPath("."));
|
||||||
Expr call = makeCall(e2, e1);
|
Expr call = makeCall(e2, e1);
|
||||||
getDerivations(state, call, elems);
|
getDerivations(state, call, "", elems);
|
||||||
}
|
}
|
||||||
|
|
||||||
break;
|
break;
|
||||||
|
@ -388,7 +388,9 @@ static void queryInstSources(EvalState & state,
|
||||||
for (Strings::const_iterator i = args.begin();
|
for (Strings::const_iterator i = args.begin();
|
||||||
i != args.end(); ++i)
|
i != args.end(); ++i)
|
||||||
getDerivations(state,
|
getDerivations(state,
|
||||||
parseExprFromFile(state, instSource.nixExprPath), elems, *i);
|
findAlongAttrPath(state, *i,
|
||||||
|
parseExprFromFile(state, instSource.nixExprPath)),
|
||||||
|
"", elems);
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -9,6 +9,7 @@
|
||||||
#include "parser.hh"
|
#include "parser.hh"
|
||||||
#include "nixexpr-ast.hh"
|
#include "nixexpr-ast.hh"
|
||||||
#include "get-drvs.hh"
|
#include "get-drvs.hh"
|
||||||
|
#include "attr-path.hh"
|
||||||
#include "help.txt.hh"
|
#include "help.txt.hh"
|
||||||
|
|
||||||
|
|
||||||
|
@ -18,13 +19,12 @@ void printHelp()
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
static Expr evalStdin(EvalState & state, bool parseOnly)
|
static Expr parseStdin(EvalState & state)
|
||||||
{
|
{
|
||||||
startNest(nest, lvlTalkative, format("evaluating standard input"));
|
startNest(nest, lvlTalkative, format("parsing standard input"));
|
||||||
string s, s2;
|
string s, s2;
|
||||||
while (getline(cin, s2)) s += s2 + "\n";
|
while (getline(cin, s2)) s += s2 + "\n";
|
||||||
Expr e = parseExprFromString(state, s, absPath("."));
|
return parseExprFromString(state, s, absPath("."));
|
||||||
return parseOnly ? e : evalExpr(state, e);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
@ -34,7 +34,7 @@ static bool indirectRoot = false;
|
||||||
|
|
||||||
|
|
||||||
static void printResult(EvalState & state, Expr e,
|
static void printResult(EvalState & state, Expr e,
|
||||||
bool evalOnly, bool printArgs, const string & attrPath)
|
bool evalOnly, bool printArgs)
|
||||||
{
|
{
|
||||||
if (evalOnly)
|
if (evalOnly)
|
||||||
cout << format("%1%\n") % e;
|
cout << format("%1%\n") % e;
|
||||||
|
@ -54,7 +54,7 @@ static void printResult(EvalState & state, Expr e,
|
||||||
|
|
||||||
else {
|
else {
|
||||||
DrvInfos drvs;
|
DrvInfos drvs;
|
||||||
getDerivations(state, e, drvs, attrPath);
|
getDerivations(state, e, "", drvs);
|
||||||
for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) {
|
for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) {
|
||||||
Path drvPath = i->queryDrvPath(state);
|
Path drvPath = i->queryDrvPath(state);
|
||||||
if (gcRoot == "")
|
if (gcRoot == "")
|
||||||
|
@ -119,18 +119,19 @@ void run(Strings args)
|
||||||
openDB();
|
openDB();
|
||||||
|
|
||||||
if (readStdin) {
|
if (readStdin) {
|
||||||
Expr e = evalStdin(state, parseOnly);
|
Expr e = findAlongAttrPath(state, attrPath, parseStdin(state));
|
||||||
printResult(state, e, evalOnly, printArgs, attrPath);
|
if (!parseOnly) e = evalExpr(state, e);
|
||||||
|
printResult(state, e, evalOnly, printArgs);
|
||||||
}
|
}
|
||||||
|
|
||||||
for (Strings::iterator i = files.begin();
|
for (Strings::iterator i = files.begin();
|
||||||
i != files.end(); i++)
|
i != files.end(); i++)
|
||||||
{
|
{
|
||||||
Path path = absPath(*i);
|
Path path = absPath(*i);
|
||||||
Expr e = parseOnly
|
Expr e = findAlongAttrPath(state, attrPath,
|
||||||
? parseExprFromFile(state, path)
|
parseExprFromFile(state, path));
|
||||||
: evalFile(state, path);
|
if (!parseOnly) e = evalExpr(state, e);
|
||||||
printResult(state, e, evalOnly, printArgs, attrPath);
|
printResult(state, e, evalOnly, printArgs);
|
||||||
}
|
}
|
||||||
|
|
||||||
printEvalStats(state);
|
printEvalStats(state);
|
||||||
|
|
Loading…
Reference in a new issue