e0204f8d46
Caching path info is generally useful. For instance, it speeds up "nix path-info -rS /run/current-system" (i.e. showing the closure sizes of all paths in the closure of the current system) from 5.6s to 0.15s. This also eliminates some APIs like Store::queryDeriver() and Store::queryReferences().
67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
#include "xmlgraph.hh"
|
|
#include "util.hh"
|
|
#include "store-api.hh"
|
|
|
|
#include <iostream>
|
|
|
|
|
|
using std::cout;
|
|
|
|
namespace nix {
|
|
|
|
|
|
static inline const string & xmlQuote(const string & s)
|
|
{
|
|
// Luckily, store paths shouldn't contain any character that needs to be
|
|
// quoted.
|
|
return s;
|
|
}
|
|
|
|
|
|
static string makeEdge(const string & src, const string & dst)
|
|
{
|
|
format f = format(" <edge src=\"%1%\" dst=\"%2%\"/>\n")
|
|
% xmlQuote(src) % xmlQuote(dst);
|
|
return f.str();
|
|
}
|
|
|
|
|
|
static string makeNode(const string & id)
|
|
{
|
|
format f = format(" <node name=\"%1%\"/>\n") % xmlQuote(id);
|
|
return f.str();
|
|
}
|
|
|
|
|
|
void printXmlGraph(ref<Store> store, const PathSet & roots)
|
|
{
|
|
PathSet workList(roots);
|
|
PathSet doneSet;
|
|
|
|
cout << "<?xml version='1.0' encoding='utf-8'?>\n"
|
|
<< "<nix>\n";
|
|
|
|
while (!workList.empty()) {
|
|
Path path = *(workList.begin());
|
|
workList.erase(path);
|
|
|
|
if (doneSet.find(path) != doneSet.end()) continue;
|
|
doneSet.insert(path);
|
|
|
|
cout << makeNode(path);
|
|
|
|
for (auto & p : store->queryPathInfo(path)->references) {
|
|
if (p != path) {
|
|
workList.insert(p);
|
|
cout << makeEdge(p, path);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
cout << "</nix>\n";
|
|
}
|
|
|
|
|
|
}
|