diff options
author | Eelco Dolstra <e.dolstra@tudelft.nl> | 2005-02-07 14:32:44 +0000 |
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committer | Eelco Dolstra <e.dolstra@tudelft.nl> | 2005-02-07 14:32:44 +0000 |
commit | fbc434ee4c39e7516f3634371442899864786584 (patch) | |
tree | 9ea7e2d90f78fa6b100c35c135822b984c408882 /src/nix-store | |
parent | 450c358e2055488897349bf50951cce16ad9bc90 (diff) |
* `nix-store -qb' to query derivation environment bindings. Useful
for finding build-time dependencies (possibly after a build). E.g.,
$ nix-store -qb aterm $(nix-store -qd $(which strc))
/nix/store/jw7c7s65n1gwhxpn35j9rgcci6ilzxym-aterm-2.3.1
* Arguments to nix-store can be files within store objects, e.g.,
/nix/store/jw7c...-aterm-2.3.1/bin/baffle.
* Idem for garbage collector roots.
Diffstat (limited to 'src/nix-store')
-rw-r--r-- | src/nix-store/main.cc | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/src/nix-store/main.cc b/src/nix-store/main.cc index 4b8d2cf3f..f9bd3323f 100644 --- a/src/nix-store/main.cc +++ b/src/nix-store/main.cc @@ -32,15 +32,15 @@ static Path findOutput(const Derivation & drv, string id) } -static Path followSymlinks(Path & path) +static Path fixPath(Path path) { path = absPath(path); - while (!isStorePath(path)) { - if (!isLink(path)) return path; + while (!isInStore(path)) { + if (!isLink(path)) break; string target = readLink(path); path = absPath(target, dirOf(path)); } - return path; + return toStorePath(path); } @@ -76,7 +76,7 @@ static void opRealise(Strings opFlags, Strings opArgs) for (Strings::iterator i = opArgs.begin(); i != opArgs.end(); i++) - *i = followSymlinks(*i); + *i = fixPath(*i); if (opArgs.size() > 1) { PathSet drvPaths; @@ -162,19 +162,27 @@ static void printPathSet(const PathSet & paths) static void opQuery(Strings opFlags, Strings opArgs) { enum { qOutputs, qRequisites, qReferences, qReferers, - qReferersClosure, qDeriver, qGraph } query = qOutputs; + qReferersClosure, qDeriver, qBinding, qGraph } query = qOutputs; bool useOutput = false; bool includeOutputs = false; bool forceRealise = false; + string bindingName; for (Strings::iterator i = opFlags.begin(); - i != opFlags.end(); i++) + i != opFlags.end(); ++i) if (*i == "--outputs") query = qOutputs; else if (*i == "--requisites" || *i == "-R") query = qRequisites; else if (*i == "--references") query = qReferences; else if (*i == "--referers") query = qReferers; else if (*i == "--referers-closure") query = qReferersClosure; else if (*i == "--deriver" || *i == "-d") query = qDeriver; + else if (*i == "--binding" || *i == "-b") { + if (opArgs.size() == 0) + throw UsageError("expected binding name"); + bindingName = opArgs.front(); + opArgs.pop_front(); + query = qBinding; + } else if (*i == "--graph") query = qGraph; else if (*i == "--use-output" || *i == "-u") useOutput = true; else if (*i == "--force-realise" || *i == "-f") forceRealise = true; @@ -187,7 +195,7 @@ static void opQuery(Strings opFlags, Strings opArgs) for (Strings::iterator i = opArgs.begin(); i != opArgs.end(); i++) { - *i = followSymlinks(*i); + *i = fixPath(*i); if (forceRealise) realisePath(*i); Derivation drv = derivationFromPath(*i); cout << format("%1%\n") % findOutput(drv, "out"); @@ -203,7 +211,7 @@ static void opQuery(Strings opFlags, Strings opArgs) for (Strings::iterator i = opArgs.begin(); i != opArgs.end(); i++) { - *i = followSymlinks(*i); + *i = fixPath(*i); Path path = maybeUseOutput(*i, useOutput, forceRealise); if (query == qRequisites) storePathRequisites(path, includeOutputs, paths); @@ -219,13 +227,26 @@ static void opQuery(Strings opFlags, Strings opArgs) for (Strings::iterator i = opArgs.begin(); i != opArgs.end(); i++) { - *i = followSymlinks(*i); + *i = fixPath(*i); Path deriver = queryDeriver(noTxn, *i); cout << format("%1%\n") % (deriver == "" ? "unknown-deriver" : deriver); } break; - + + case qBinding: + for (Strings::iterator i = opArgs.begin(); + i != opArgs.end(); i++) + { + *i = fixPath(*i); + Derivation drv = derivationFromPath(*i); + StringPairs::iterator j = drv.env.find(bindingName); + if (j == drv.env.end()) + throw Error(format("derivation `%1%' has no environment binding named `%2%'") + % *i % bindingName); + cout << format("%1%\n") % j->second; + } + break; #if 0 case qGraph: { |