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#include "dotgraph.hh"
#include "util.hh"
#include "store-api.hh"
#include <iostream>
using std::cout;
namespace nix {
static string dotQuote(std::string_view s)
{
return "\"" + std::string(s) + "\"";
}
static string nextColour()
{
static int n = 0;
static string colours[] =
{ "black", "red", "green", "blue"
, "magenta", "burlywood" };
return colours[n++ % (sizeof(colours) / sizeof(string))];
}
static string makeEdge(const string & src, const string & dst)
{
format f = format("%1% -> %2% [color = %3%];\n")
% dotQuote(src) % dotQuote(dst) % dotQuote(nextColour());
return f.str();
}
static string makeNode(const string & id, std::string_view label,
const string & colour)
{
format f = format("%1% [label = %2%, shape = box, "
"style = filled, fillcolor = %3%];\n")
% dotQuote(id) % dotQuote(label) % dotQuote(colour);
return f.str();
}
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.clone()).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.clone());
cout << makeEdge(std::string(p.to_string()), std::string(path.to_string()));
}
}
}
cout << "}\n";
}
}
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