forked from lix-project/lix
* `nix-store -q --hash' to quickly query the hash of the contents of a
store path (which is stored in the database).
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9e50e648a4
commit
07b4399fb6
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@ -509,6 +509,14 @@ static Hash queryHash(const Transaction & txn, const Path & storePath)
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}
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Hash queryPathHash(const Path & path)
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{
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if (!isValidPath(path))
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throw Error(format("path `%1%' is not valid") % path);
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return queryHash(noTxn, path);
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}
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void registerValidPath(const Transaction & txn,
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const Path & _path, const Hash & hash, const PathSet & references,
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const Path & deriver)
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@ -89,6 +89,9 @@ void canonicalisePathMetaData(const Path & path);
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/* Checks whether a path is valid. */
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bool isValidPath(const Path & path);
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/* Queries the hash of a valid path. */
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Hash queryPathHash(const Path & path);
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/* Sets the set of outgoing FS references for a store path. Use with
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care! */
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void setReferences(const Transaction & txn, const Path & storePath,
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@ -228,8 +228,9 @@ static void printDrvTree(const Path & drvPath,
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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, qReferences, qReferers,
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qReferersClosure, qDeriver, qBinding, qTree, qGraph } query = qOutputs;
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enum { qOutputs, qRequisites, qReferences, qReferers
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, qReferersClosure, qDeriver, qBinding, qHash
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, qTree, qGraph } query = qOutputs;
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bool useOutput = false;
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bool includeOutputs = false;
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bool forceRealise = false;
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@ -250,6 +251,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
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opArgs.pop_front();
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query = qBinding;
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}
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else if (*i == "--hash") query = qHash;
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else if (*i == "--tree") query = qTree;
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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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@ -279,8 +281,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
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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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*i = fixPath(*i);
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Path path = maybeUseOutput(*i, useOutput, forceRealise);
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Path path = maybeUseOutput(fixPath(*i), useOutput, forceRealise);
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if (query == qRequisites)
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storePathRequisites(path, includeOutputs, paths);
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else if (query == qReferences) queryReferences(noTxn, path, paths);
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@ -295,8 +296,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
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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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*i = fixPath(*i);
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Path deriver = queryDeriver(noTxn, *i);
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Path deriver = queryDeriver(noTxn, fixPath(*i));
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cout << format("%1%\n") %
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(deriver == "" ? "unknown-deriver" : deriver);
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}
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@ -316,6 +316,17 @@ static void opQuery(Strings opFlags, Strings opArgs)
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}
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break;
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case qHash:
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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(fixPath(*i), useOutput, forceRealise);
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Hash hash = queryPathHash(path);
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assert(hash.type == htSHA256);
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cout << format("sha256:%1%\n") % printHash32(hash);
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}
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break;
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case qTree: {
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PathSet done;
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for (Strings::iterator i = opArgs.begin();
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