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* Add an operation `nix-store -q --size'.

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This commit is contained in:
Eelco Dolstra 2010-11-17 12:40:52 +00:00
parent 1db6259076
commit e60c962fb8
5 changed files with 40 additions and 10 deletions
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3
src/nix-store/help.txt
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@ -16,7 +16,7 @@ Operations:
--gc: run the garbage collector
--dump: dump a path as a Nix archive, forgetting dependencies
--dump: dump a path as a Nix archive (NAR), forgetting dependencies
--restore: restore a path from a Nix archive, without
registering validity
@ -44,6 +44,7 @@ Query flags:
--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
--size: print the size of the NAR dump of the path
--roots: print the garbage collector roots that point to the path
Query switches (not applicable to all queries):

13
src/nix-store/nix-store.cc
View file

@ -226,7 +226,7 @@ static void printTree(const Path & path,
static void opQuery(Strings opFlags, Strings opArgs)
{
enum { qOutputs, qRequisites, qReferences, qReferrers
, qReferrersClosure, qDeriver, qBinding, qHash
, qReferrersClosure, qDeriver, qBinding, qHash, qSize
, qTree, qGraph, qXml, qResolve, qRoots } query = qOutputs;
bool useOutput = false;
bool includeOutputs = false;
@ -248,6 +248,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
query = qBinding;
}
else if (*i == "--hash") query = qHash;
else if (*i == "--size") query = qSize;
else if (*i == "--tree") query = qTree;
else if (*i == "--graph") query = qGraph;
else if (*i == "--xml") query = qXml;
@ -310,11 +311,15 @@ static void opQuery(Strings opFlags, Strings opArgs)
break;
case qHash:
case qSize:
foreach (Strings::iterator, i, opArgs) {
Path path = maybeUseOutput(followLinksToStorePath(*i), useOutput, forceRealise);
Hash hash = store->queryPathHash(path);
assert(hash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(hash);
ValidPathInfo info = store->queryPathInfo(path);
if (query == qHash) {
assert(info.hash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(info.hash);
} else if (query == qSize)
cout << format("%1%\n") % info.narSize;
}
break;