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* Implemented the primops necessary for generating the NixOS manual.

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This commit is contained in:
Eelco Dolstra 2010-04-07 13:55:46 +00:00
parent a353aef0b1
commit fc92244ba8
8 changed files with 160 additions and 146 deletions
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149
src/libexpr/expr-to-xml.cc
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@ -18,24 +18,19 @@ static XMLAttrs singletonAttrs(const string & name, const string & value)
}
/* set<Expr> is safe because all the expressions are also reachable
from the stack, therefore can't be garbage-collected. */
typedef set<Expr> ExprSet;
static void printValueAsXML(EvalState & state, bool strict, Value & v,
XMLWriter & doc, PathSet & context, PathSet & drvsSeen);
static void printTermAsXML(Expr e, XMLWriter & doc, PathSet & context,
ExprSet & drvsSeen);
static void showAttrs(const ATermMap & attrs, XMLWriter & doc,
PathSet & context, ExprSet & drvsSeen)
static void showAttrs(EvalState & state, bool strict, Bindings & attrs,
XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
{
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) {
foreach (Bindings::iterator, i, attrs)
names.insert(aterm2String(i->first));
foreach (StringSet::iterator, i, names) {
XMLOpenElement _(doc, "attr", singletonAttrs("name", *i));
printTermAsXML(attrs.get(toATerm(*i)), doc, context, drvsSeen);
printValueAsXML(state, strict, attrs[toATerm(*i)], doc, context, drvsSeen);
}
}
@ -61,91 +56,93 @@ static void printPatternAsXML(Pattern pat, XMLWriter & doc)
}
static void printTermAsXML(Expr e, XMLWriter & doc, PathSet & context,
ExprSet & drvsSeen)
static void printValueAsXML(EvalState & state, bool strict, Value & v,
XMLWriter & doc, PathSet & context, PathSet & drvsSeen)
{
XMLAttrs attrs;
string s;
ATerm s2;
int i;
ATermList as, es;
ATerm pat, body, pos;
checkInterrupt();
if (matchStr(e, s, context)) /* !!! show the context? */
doc.writeEmptyElement("string", singletonAttrs("value", s));
if (strict) state.forceValue(v);
switch (v.type) {
else if (matchPath(e, s2))
doc.writeEmptyElement("path", singletonAttrs("value", aterm2String(s2)));
case tInt:
doc.writeEmptyElement("int", singletonAttrs("value", (format("%1%") % v.integer).str()));
break;
else if (matchNull(e))
doc.writeEmptyElement("null");
case tBool:
doc.writeEmptyElement("bool", singletonAttrs("value", v.boolean ? "true" : "false"));
break;
else if (matchInt(e, i))
doc.writeEmptyElement("int", singletonAttrs("value", (format("%1%") % i).str()));
case tString:
/* !!! show the context? */
doc.writeEmptyElement("string", singletonAttrs("value", v.string.s));
break;
else if (e == eTrue)
doc.writeEmptyElement("bool", singletonAttrs("value", "true"));
case tPath:
doc.writeEmptyElement("path", singletonAttrs("value", v.path));
break;
else if (e == eFalse)
doc.writeEmptyElement("bool", singletonAttrs("value", "false"));
case tNull:
doc.writeEmptyElement("null");
break;
else if (matchAttrs(e, as)) {
ATermMap attrs;
queryAllAttrs(e, attrs);
Expr a = attrs.get(toATerm("type"));
if (a && matchStr(a, s, context) && s == "derivation") {
XMLAttrs xmlAttrs;
Path outPath, drvPath;
case tAttrs:
if (state.isDerivation(v)) {
XMLAttrs xmlAttrs;
a = attrs.get(toATerm("drvPath"));
if (matchStr(a, drvPath, context))
xmlAttrs["drvPath"] = drvPath;
a = attrs.get(toATerm("outPath"));
if (matchStr(a, outPath, context))
xmlAttrs["outPath"] = outPath;
XMLOpenElement _(doc, "derivation", xmlAttrs);
Bindings::iterator a = v.attrs->find(toATerm("derivation"));
if (drvsSeen.find(e) == drvsSeen.end()) {
drvsSeen.insert(e);
showAttrs(attrs, doc, context, drvsSeen);
} else
doc.writeEmptyElement("repeated");
Path drvPath;
a = v.attrs->find(toATerm("drvPath"));
if (a != v.attrs->end() && a->second.type == tString)
xmlAttrs["drvPath"] = drvPath = a->second.string.s;
a = v.attrs->find(toATerm("outPath"));
if (a != v.attrs->end() && a->second.type == tString)
xmlAttrs["outPath"] = a->second.string.s;
XMLOpenElement _(doc, "derivation", xmlAttrs);
if (drvPath != "" && drvsSeen.find(drvPath) == drvsSeen.end()) {
drvsSeen.insert(drvPath);
showAttrs(state, strict, *v.attrs, doc, context, drvsSeen);
} else
doc.writeEmptyElement("repeated");
}
else {
XMLOpenElement _(doc, "attrs");
showAttrs(state, strict, *v.attrs, doc, context, drvsSeen);
}
break;
case tList: {
XMLOpenElement _(doc, "list");
for (unsigned int n = 0; n < v.list.length; ++n)
printValueAsXML(state, strict, v.list.elems[n], doc, context, drvsSeen);
break;
}
else {
XMLOpenElement _(doc, "attrs");
showAttrs(attrs, doc, context, drvsSeen);
case tLambda: {
XMLOpenElement _(doc, "function");
printPatternAsXML(v.lambda.pat, doc);
break;
}
}
else if (matchList(e, es)) {
XMLOpenElement _(doc, "list");
for (ATermIterator i(es); i; ++i)
printTermAsXML(*i, doc, context, drvsSeen);
default:
doc.writeEmptyElement("unevaluated");
}
else if (matchFunction(e, pat, body, pos)) {
XMLOpenElement _(doc, "function");
printPatternAsXML(pat, doc);
}
else
doc.writeEmptyElement("unevaluated");
}
void printTermAsXML(Expr e, std::ostream & out, PathSet & context)
void printValueAsXML(EvalState & state, bool strict,
Value & v, std::ostream & out, PathSet & context)
{
XMLWriter doc(true, out);
XMLOpenElement root(doc, "expr");
ExprSet drvsSeen;
printTermAsXML(e, doc, context, drvsSeen);
PathSet drvsSeen;
printValueAsXML(state, strict, v, doc, context, drvsSeen);
}