forked from lix-project/lix
135 lines
3 KiB
C++
135 lines
3 KiB
C++
#include "dotgraph.hh"
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static string dotQuote(const string & s)
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{
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return "\"" + s + "\"";
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}
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static string nextColour()
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{
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static int n = 0;
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static string colours[] =
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{ "black", "red", "green", "blue"
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, "magenta", "burlywood" };
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return colours[n++ % (sizeof(colours) / sizeof(string))];
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}
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static string makeEdge(const string & src, const string & dst)
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{
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format f = format("%1% -> %2% [color = %3%];\n")
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% dotQuote(src) % dotQuote(dst) % dotQuote(nextColour());
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return f.str();
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}
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static string makeNode(const string & id, const string & label,
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const string & colour)
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{
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format f = format("%1% [label = %2%, shape = box, "
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"style = filled, fillcolor = %3%];\n")
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% dotQuote(id) % dotQuote(label) % dotQuote(colour);
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return f.str();
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}
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static string symbolicName(const string & path)
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{
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string p = baseNameOf(path);
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if (isHash(string(p, 0, Hash::hashSize * 2)) &&
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p[Hash::hashSize * 2] == '-')
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p = string(p, Hash::hashSize * 2 + 1);
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return p;
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}
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string pathLabel(const FSId & id, const string & path)
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{
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return (string) id + "-" + path;
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}
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void printClosure(const FSId & id, const NixExpr & fs)
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{
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Strings workList(fs.closure.roots.begin(), fs.closure.roots.end());
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StringSet doneSet;
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for (Strings::iterator i = workList.begin(); i != workList.end(); i++) {
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cout << makeEdge(pathLabel(id, *i), id);
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}
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while (!workList.empty()) {
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string path = workList.front();
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workList.pop_front();
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if (doneSet.find(path) == doneSet.end()) {
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doneSet.insert(path);
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ClosureElems::const_iterator elem = fs.closure.elems.find(path);
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if (elem == fs.closure.elems.end())
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throw Error(format("bad closure, missing path `%1%'") % path);
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for (StringSet::const_iterator i = elem->second.refs.begin();
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i != elem->second.refs.end(); i++)
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{
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workList.push_back(*i);
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cout << makeEdge(pathLabel(id, *i), pathLabel(id, path));
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}
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cout << makeNode(pathLabel(id, path),
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symbolicName(path), "#ff0000");
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}
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}
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}
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void printDotGraph(const FSIds & roots)
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{
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FSIds workList(roots.begin(), roots.end());
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FSIdSet doneSet;
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cout << "digraph G {\n";
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while (!workList.empty()) {
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FSId id = workList.front();
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workList.pop_front();
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if (doneSet.find(id) == doneSet.end()) {
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doneSet.insert(id);
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NixExpr ne = parseNixExpr(termFromId(id));
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string label, colour;
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if (ne.type == NixExpr::neDerivation) {
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for (FSIdSet::iterator i = ne.derivation.inputs.begin();
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i != ne.derivation.inputs.end(); i++)
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{
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workList.push_back(*i);
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cout << makeEdge(*i, id);
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}
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label = "derivation";
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colour = "#00ff00";
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for (StringPairs::iterator i = ne.derivation.env.begin();
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i != ne.derivation.env.end(); i++)
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if (i->first == "name") label = i->second;
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}
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else if (ne.type == NixExpr::neClosure) {
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label = "<closure>";
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colour = "#00ffff";
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printClosure(id, ne);
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}
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else abort();
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cout << makeNode(id, label, colour);
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}
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}
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cout << "}\n";
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}
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