Add XML output to `nix-store'.

* src/nix-store/Makefile.am (nix_store_SOURCES): Add `xmlgraph.cc' and
  `xmlgraph.hh'.

* src/nix-store/help.txt (Operations): Document `--xml'.

* src/nix-store/nix-store.cc (opQuery): Handle `--xml'.

* src/nix-store/xmlgraph.cc, src/nix-store/xmlgraph.hh: New files.
This commit is contained in:
Ludovic Courtès 2010-05-31 16:36:24 +00:00
parent da52f8bea0
commit 8bcdd36f10
5 changed files with 100 additions and 3 deletions

View file

@ -1,6 +1,9 @@
bin_PROGRAMS = nix-store
nix_store_SOURCES = nix-store.cc dotgraph.cc dotgraph.hh help.txt
nix_store_SOURCES = \
nix-store.cc dotgraph.cc dotgraph.hh help.txt \
xmlgraph.cc xmlgraph.hh
nix_store_LDADD = ../libmain/libmain.la ../libstore/libstore.la ../libutil/libutil.la \
../boost/format/libformat.la @ADDITIONAL_NETWORK_LIBS@

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@ -39,6 +39,7 @@ Query flags:
--referrers-closure: print all paths (in)directly refering to the path
--tree: print a tree showing the dependency graph of the path
--graph: print a dot graph rooted at given path
--xml: emit an XML representation of the graph rooted at the given path
--hash: print the SHA-256 hash of the contents of the path
--roots: print the garbage collector roots that point to the path

View file

@ -6,6 +6,7 @@
#include "archive.hh"
#include "shared.hh"
#include "dotgraph.hh"
#include "xmlgraph.hh"
#include "local-store.hh"
#include "util.hh"
#include "help.txt.hh"
@ -226,7 +227,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
{
enum { qOutputs, qRequisites, qReferences, qReferrers
, qReferrersClosure, qDeriver, qBinding, qHash
, qTree, qGraph, qResolve, qRoots } query = qOutputs;
, qTree, qGraph, qXml, qResolve, qRoots } query = qOutputs;
bool useOutput = false;
bool includeOutputs = false;
bool forceRealise = false;
@ -249,6 +250,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
else if (*i == "--hash") query = qHash;
else if (*i == "--tree") query = qTree;
else if (*i == "--graph") query = qGraph;
else if (*i == "--xml") query = qXml;
else if (*i == "--resolve") query = qResolve;
else if (*i == "--roots") query = qRoots;
else if (*i == "--use-output" || *i == "-u") useOutput = true;
@ -327,7 +329,15 @@ static void opQuery(Strings opFlags, Strings opArgs)
PathSet roots;
foreach (Strings::iterator, i, opArgs)
roots.insert(maybeUseOutput(followLinksToStorePath(*i), useOutput, forceRealise));
printDotGraph(roots);
printDotGraph(roots);
break;
}
case qXml: {
PathSet roots;
foreach (Strings::iterator, i, opArgs)
roots.insert(maybeUseOutput(followLinksToStorePath(*i), useOutput, forceRealise));
printXmlGraph(roots);
break;
}

71
src/nix-store/xmlgraph.cc Normal file
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@ -0,0 +1,71 @@
#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(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);
PathSet references;
store->queryReferences(path, references);
for (PathSet::iterator i = references.begin();
i != references.end(); ++i)
{
if (*i != path) {
workList.insert(*i);
cout << makeEdge(*i, path);
}
}
}
cout << "</nix>\n";
}
}

12
src/nix-store/xmlgraph.hh Normal file
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@ -0,0 +1,12 @@
#ifndef __XMLGRAPH_H
#define __XMLGRAPH_H
#include "types.hh"
namespace nix {
void printXmlGraph(const PathSet & roots);
}
#endif /* !__XMLGRAPH_H */