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#include "dotgraph.hh"
#include "store-api.hh"
#include <iostream>
using std::cout;
namespace nix {
static std::string dotQuote(std::string_view s)
{
return "\"" + std::string(s) + "\"";
}
static const std::string & nextColour()
{
static int n = 0;
static std::vector<std::string> colours
{ "black", "red", "green", "blue"
, "magenta", "burlywood" };
return colours[n++ % colours.size()];
}
static std::string makeEdge(std::string_view src, std::string_view dst)
{
return fmt("%1% -> %2% [color = %3%];\n",
dotQuote(src), dotQuote(dst), dotQuote(nextColour()));
}
static std::string makeNode(std::string_view id, std::string_view label,
std::string_view colour)
{
return fmt("%1% [label = %2%, shape = box, "
"style = filled, fillcolor = %3%];\n",
dotQuote(id), dotQuote(label), dotQuote(colour));
}
void printDotGraph(ref<Store> store, StorePathSet && roots)
{
StorePathSet workList(std::move(roots));
StorePathSet doneSet;
cout << "digraph G {\n";
while (!workList.empty()) {
auto path = std::move(workList.extract(workList.begin()).value());
if (!doneSet.insert(path).second) continue;
cout << makeNode(std::string(path.to_string()), path.name(), "#ff0000");
for (auto & p : store->queryPathInfo(path)->references) {
if (p != path) {
workList.insert(p);
cout << makeEdge(std::string(p.to_string()), std::string(path.to_string()));
}
}
}
cout << "}\n";
}
}
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