74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
#include "dotgraph.hh"
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#include "util.hh"
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#include "store-api.hh"
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#include <iostream>
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using std::cout;
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namespace nix {
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static string dotQuote(std::string_view s)
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{
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return "\"" + std::string(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, std::string_view 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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void printDotGraph(ref<Store> store, StorePathSet && roots)
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{
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StorePathSet workList(std::move(roots));
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StorePathSet doneSet;
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cout << "digraph G {\n";
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while (!workList.empty()) {
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auto path = std::move(workList.extract(workList.begin()).value());
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if (!doneSet.insert(path.clone()).second) continue;
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cout << makeNode(std::string(path.to_string()), path.name(), "#ff0000");
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for (auto & p : store->queryPathInfo(path)->references) {
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if (p != path) {
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workList.insert(p.clone());
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cout << makeEdge(std::string(p.to_string()), std::string(path.to_string()));
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}
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}
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}
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cout << "}\n";
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}
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}
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