forked from lix-project/lix
* Nix-store queries --references' and
referers' to query the pointer
graph. That is, `nix-store --query --references PATH' shows the set of paths referenced by PATH, and `nix-store --query --referers PATH' shows the set of paths referencing PATH.
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parent
96de272b48
commit
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@ -272,6 +272,16 @@ void queryReferences(const Path & storePath, PathSet & references)
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}
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void queryReferers(const Path & storePath, PathSet & referers)
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{
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Paths referers2;
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if (!isValidPath(storePath))
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throw Error(format("path `%1%' is not valid") % storePath);
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nixDB.queryStrings(noTxn, dbReferers, storePath, referers2);
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referers.insert(referers2.begin(), referers2.end());
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}
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static Substitutes readSubstitutes(const Transaction & txn,
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const Path & srcPath)
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{
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@ -84,6 +84,10 @@ void setReferences(const Transaction & txn, const Path & storePath,
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result is not cleared. */
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void queryReferences(const Path & storePath, PathSet & references);
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/* Queries the set of incoming FS references for a store path. The
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result is not cleared. */
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void queryReferers(const Path & storePath, PathSet & referers);
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/* Constructs a unique store path name. */
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Path makeStorePath(const string & type,
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const Hash & hash, const string & suffix);
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@ -64,10 +64,18 @@ static Path maybeUseOutput(const Path & storePath, bool useOutput)
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}
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static void printPathSet(const PathSet & paths)
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{
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for (PathSet::iterator i = paths.begin();
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i != paths.end(); i++)
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cout << format("%s\n") % *i;
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}
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/* Perform various sorts of queries. */
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static void opQuery(Strings opFlags, Strings opArgs)
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{
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enum { qOutputs, qRequisites, qPredecessors, qGraph } query = qOutputs;
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enum { qOutputs, qRequisites, qReferences, qReferers, qGraph } query = qOutputs;
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bool useOutput = false;
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bool includeOutputs = false;
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@ -75,6 +83,8 @@ static void opQuery(Strings opFlags, Strings opArgs)
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i != opFlags.end(); i++)
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if (*i == "--outputs") query = qOutputs;
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else if (*i == "--requisites" || *i == "-R") query = qRequisites;
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else if (*i == "--references") query = qReferences;
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else if (*i == "--referers") query = qReferers;
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else if (*i == "--graph") query = qGraph;
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else if (*i == "--use-output" || *i == "-u") useOutput = true;
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else if (*i == "--include-outputs") includeOutputs = true;
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@ -92,33 +102,24 @@ static void opQuery(Strings opFlags, Strings opArgs)
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break;
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}
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case qRequisites: {
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case qRequisites:
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case qReferences:
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case qReferers: {
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PathSet paths;
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for (Strings::iterator i = opArgs.begin();
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i != opArgs.end(); i++)
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{
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Path path = maybeUseOutput(*i, useOutput);
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storePathRequisites(path, includeOutputs, paths);
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if (query == qRequisites)
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storePathRequisites(path, includeOutputs, paths);
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else if (query == qReferences) queryReferences(path, paths);
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else if (query == qReferers) queryReferers(path, paths);
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}
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for (PathSet::iterator i = paths.begin();
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i != paths.end(); i++)
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cout << format("%s\n") % *i;
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printPathSet(paths);
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break;
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}
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#if 0
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case qPredecessors: {
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for (Strings::iterator i = opArgs.begin();
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i != opArgs.end(); i++)
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{
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Paths preds = queryPredecessors(*i);
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for (Paths::iterator j = preds.begin();
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j != preds.end(); j++)
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cout << format("%s\n") % *j;
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}
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break;
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}
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case qGraph: {
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PathSet roots;
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for (Strings::iterator i = opArgs.begin();
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