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* nix-store --dump-db / --load-db to dump/load the Nix DB.

Browse source 
* nix-store --register-validity: option to supply the content hash of
  each path.
* Removed compatibility with Nix <= 0.7 stores.
This commit is contained in:
Eelco Dolstra 2008-01-29 18:17:36 +00:00
parent 5b5a3af983
commit 66c51dc215
9 changed files with 130 additions and 137 deletions
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13
doc/manual/release-notes.xml
View file

@ -6,6 +6,19 @@
<!--==================================================================-->
<section xml:id="ssec-relnotes-0.12"><title>Release 0.12 (TBA)</title>
<itemizedlist>
<listitem><para><command>nix-store --dump-db / --load-db</command>.</para></listitem>
</itemizedlist>
</section>
<!--==================================================================-->
<section xml:id="ssec-relnotes-0.11"><title>Release 0.11 (December 31,

34
src/libstore/build.cc
View file

@ -1263,34 +1263,6 @@ string showPaths(const PathSet & paths)
}
/* Return a string accepted by `nix-store --register-validity' that
registers the specified paths as valid. Note: it's the
responsibility of the caller to provide a closure. */
static string makeValidityRegistration(const PathSet & paths,
bool showDerivers)
{
string s = "";
for (PathSet::iterator i = paths.begin(); i != paths.end(); ++i) {
s += *i + "\n";
Path deriver = showDerivers ? store->queryDeriver(*i) : "";
s += deriver + "\n";
PathSet references;
store->queryReferences(*i, references);
s += (format("%1%\n") % references.size()).str();
for (PathSet::iterator j = references.begin();
j != references.end(); ++j)
s += *j + "\n";
}
return s;
}
DerivationGoal::HookReply DerivationGoal::tryBuildHook()
{
if (!useBuildHook) return rpDecline;
@ -1417,7 +1389,7 @@ DerivationGoal::HookReply DerivationGoal::tryBuildHook()
/* The `references' file has exactly the format accepted by
`nix-store --register-validity'. */
writeStringToFile(referencesFN,
makeValidityRegistration(allInputs, true));
makeValidityRegistration(allInputs, true, false));
/* Tell the hook to proceed. */
writeLine(toHook.writeSide, "okay");
@ -1662,7 +1634,7 @@ void DerivationGoal::startBuilder()
/* !!! in secure Nix, the writing should be done on the
build uid for security (maybe). */
writeStringToFile(tmpDir + "/" + fileName,
makeValidityRegistration(refs, false));
makeValidityRegistration(refs, false, false));
}
// The same for derivations
@ -1701,7 +1673,7 @@ void DerivationGoal::startBuilder()
/* !!! in secure Nix, the writing should be done on the
build uid for security (maybe). */
writeStringToFile(tmpDir + "/" + fileName,
makeValidityRegistration(refs, false));
makeValidityRegistration(refs, false, false));
}

106
src/libstore/local-store.cc
View file

@ -56,7 +56,6 @@ static TableId dbReferrers = 0;
static TableId dbDerivers = 0;
static void upgradeStore07();
static void upgradeStore09();
static void upgradeStore11();
@ -128,12 +127,12 @@ LocalStore::LocalStore(bool reserveSpace)
% curSchema % nixSchemaVersion);
if (curSchema < nixSchemaVersion) {
if (curSchema == 0) /* new store */
curSchema = nixSchemaVersion;
if (curSchema <= 1)
upgradeStore07();
if (curSchema == 2)
upgradeStore09();
if (curSchema == 3)
upgradeStore11();
throw Error("your Nix store is no longer supported");
if (curSchema <= 2) upgradeStore09();
if (curSchema <= 3) upgradeStore11();
writeFile(schemaFN, (format("%1%") % nixSchemaVersion).str());
}
}
@ -261,6 +260,14 @@ bool LocalStore::isValidPath(const Path & path)
}
PathSet LocalStore::queryValidPaths()
{
Paths paths;
nixDB.enumTable(noTxn, dbValidPaths, paths);
return PathSet(paths.begin(), paths.end());
}
static string addPrefix(const string & prefix, const string & s)
{
return prefix + string(1, (char) 0) + s;
@ -1069,93 +1076,6 @@ void LocalStore::optimiseStore(bool dryRun, OptimiseStats & stats)
}
/* Upgrade from schema 1 (Nix <= 0.7) to schema 2 (Nix >= 0.8). */
static void upgradeStore07()
{
printMsg(lvlError, "upgrading Nix store to new schema (this may take a while)...");
Transaction txn(nixDB);
Paths validPaths2;
nixDB.enumTable(txn, dbValidPaths, validPaths2);
PathSet validPaths(validPaths2.begin(), validPaths2.end());
std::cerr << "hashing paths...";
int n = 0;
for (PathSet::iterator i = validPaths.begin(); i != validPaths.end(); ++i) {
checkInterrupt();
string s;
nixDB.queryString(txn, dbValidPaths, *i, s);
if (s == "") {
Hash hash = hashPath(htSHA256, *i);
setHash(txn, *i, hash);
std::cerr << ".";
if (++n % 1000 == 0) {
txn.commit();
txn.begin(nixDB);
}
}
}
std::cerr << std::endl;
txn.commit();
txn.begin(nixDB);
std::cerr << "processing closures...";
for (PathSet::iterator i = validPaths.begin(); i != validPaths.end(); ++i) {
checkInterrupt();
if (i->size() > 6 && string(*i, i->size() - 6) == ".store") {
ATerm t = ATreadFromNamedFile(i->c_str());
if (!t) throw Error(format("cannot read aterm from `%1%'") % *i);
ATermList roots, elems;
if (!matchOldClosure(t, roots, elems)) continue;
for (ATermIterator j(elems); j; ++j) {
ATerm path2;
ATermList references2;
if (!matchOldClosureElem(*j, path2, references2)) continue;
Path path = aterm2String(path2);
if (validPaths.find(path) == validPaths.end())
/* Skip this path; it's invalid. This is a normal
condition (Nix <= 0.7 did not enforce closure
on closure store expressions). */
continue;
PathSet references;
for (ATermIterator k(references2); k; ++k) {
Path reference = aterm2String(*k);
if (validPaths.find(reference) == validPaths.end())
/* Bad reference. Set it anyway and let the
user fix it. */
printMsg(lvlError, format("closure `%1%' contains reference from `%2%' "
"to invalid path `%3%' (run `nix-store --verify')")
% *i % path % reference);
references.insert(reference);
}
PathSet prevReferences;
queryReferences(txn, path, prevReferences);
if (prevReferences.size() > 0 && references != prevReferences)
printMsg(lvlError, format("warning: conflicting references for `%1%'") % path);
if (references != prevReferences)
setReferences(txn, path, references);
}
std::cerr << ".";
}
}
std::cerr << std::endl;
/* !!! maybe this transaction is way too big */
txn.commit();
}
/* Upgrade from schema 2 (0.8 <= Nix <= 0.9) to schema 3 (Nix >=
0.10). The only thing to do here is to upgrade the old `referer'
table (which causes quadratic complexity in some cases) to the new

2
src/libstore/local-store.hh
View file

@ -59,6 +59,8 @@ public:
bool isValidPath(const Path & path);
PathSet queryValidPaths();
Hash queryPathHash(const Path & path);
void queryReferences(const Path & path, PathSet & references);

6
src/libstore/remote-store.cc
View file

@ -185,6 +185,12 @@ bool RemoteStore::isValidPath(const Path & path)
}
PathSet RemoteStore::queryValidPaths()
{
throw Error("not implemented");
}
bool RemoteStore::hasSubstitutes(const Path & path)
{
writeInt(wopHasSubstitutes, to);

2
src/libstore/remote-store.hh
View file

@ -27,6 +27,8 @@ public:
bool isValidPath(const Path & path);
PathSet queryValidPaths();
Hash queryPathHash(const Path & path);
void queryReferences(const Path & path, PathSet & references);

38
src/libstore/store-api.cc
View file

@ -151,11 +151,47 @@ Path computeStorePathForText(const string & suffix, const string & s,
}
ValidPathInfo decodeValidPathInfo(std::istream & str)
/* Return a string accepted by decodeValidPathInfo() that
registers the specified paths as valid. Note: it's the
responsibility of the caller to provide a closure. */
string makeValidityRegistration(const PathSet & paths,
bool showDerivers, bool showHash)
{
string s = "";
for (PathSet::iterator i = paths.begin(); i != paths.end(); ++i) {
s += *i + "\n";
if (showHash)
s += printHash(store->queryPathHash(*i)) + "\n";
Path deriver = showDerivers ? store->queryDeriver(*i) : "";
s += deriver + "\n";
PathSet references;
store->queryReferences(*i, references);
s += (format("%1%\n") % references.size()).str();
for (PathSet::iterator j = references.begin();
j != references.end(); ++j)
s += *j + "\n";
}
return s;
}
ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
{
ValidPathInfo info;
getline(str, info.path);
if (str.eof()) { info.path = ""; return info; }
if (hashGiven) {
string s;
getline(str, s);
info.hash = parseHash(htSHA256, s);
}
getline(str, info.deriver);
string s; int n;
getline(str, s);

9
src/libstore/store-api.hh
View file

@ -35,6 +35,9 @@ public:
/* Checks whether a path is valid. */
virtual bool isValidPath(const Path & path) = 0;
/* Query the set of valid paths. */
virtual PathSet queryValidPaths() = 0;
/* Queries the hash of a valid path. */
virtual Hash queryPathHash(const Path & path) = 0;
@ -249,6 +252,9 @@ extern boost::shared_ptr<StoreAPI> store;
boost::shared_ptr<StoreAPI> openStore(bool reserveSpace = true);
string makeValidityRegistration(const PathSet & paths,
bool showDerivers, bool showHash);
struct ValidPathInfo
{
Path path;
@ -257,7 +263,8 @@ struct ValidPathInfo
PathSet references;
};
ValidPathInfo decodeValidPathInfo(std::istream & str);
ValidPathInfo decodeValidPathInfo(std::istream & str,
bool hashGiven = false);
}

57
src/nix-store/nix-store.cc
View file

@ -401,26 +401,31 @@ static void opReadLog(Strings opFlags, Strings opArgs)
}
static void opRegisterValidity(Strings opFlags, Strings opArgs)
static void opDumpDB(Strings opFlags, Strings opArgs)
{
bool reregister = false; // !!! maybe this should be the default
for (Strings::iterator i = opFlags.begin();
i != opFlags.end(); ++i)
if (*i == "--reregister") reregister = true;
else throw UsageError(format("unknown flag `%1%'") % *i);
if (!opFlags.empty()) throw UsageError("unknown flag");
if (!opArgs.empty())
throw UsageError("no arguments expected");
PathSet validPaths = store->queryValidPaths();
/* !!! this isn't streamy; makeValidityRegistration() builds a
potentially gigantic string. */
cout << makeValidityRegistration(validPaths, true, true);
}
if (!opArgs.empty()) throw UsageError("no arguments expected");
static void registerValidity(bool reregister, bool hashGiven, bool canonicalise)
{
ValidPathInfos infos;
while (1) {
ValidPathInfo info = decodeValidPathInfo(cin);
ValidPathInfo info = decodeValidPathInfo(cin, hashGiven);
if (info.path == "") break;
if (!store->isValidPath(info.path) || reregister) {
/* !!! races */
canonicalisePathMetaData(info.path);
info.hash = hashPath(htSHA256, info.path);
if (canonicalise)
canonicalisePathMetaData(info.path);
if (!hashGiven)
info.hash = hashPath(htSHA256, info.path);
infos.push_back(info);
}
}
@ -432,6 +437,32 @@ static void opRegisterValidity(Strings opFlags, Strings opArgs)
}
static void opLoadDB(Strings opFlags, Strings opArgs)
{
if (!opFlags.empty()) throw UsageError("unknown flag");
if (!opArgs.empty())
throw UsageError("no arguments expected");
registerValidity(true, true, false);
}
static void opRegisterValidity(Strings opFlags, Strings opArgs)
{
bool reregister = false; // !!! maybe this should be the default
bool hashGiven = false;
for (Strings::iterator i = opFlags.begin();
i != opFlags.end(); ++i)
if (*i == "--reregister") reregister = true;
else if (*i == "--hash-given") hashGiven = true;
else throw UsageError(format("unknown flag `%1%'") % *i);
if (!opArgs.empty()) throw UsageError("no arguments expected");
registerValidity(reregister, hashGiven, true);
}
static void opCheckValidity(Strings opFlags, Strings opArgs)
{
bool printInvalid = false;
@ -681,6 +712,10 @@ void run(Strings args)
op = opQuery;
else if (arg == "--read-log" || arg == "-l")
op = opReadLog;
else if (arg == "--dump-db")
op = opDumpDB;
else if (arg == "--load-db")
op = opLoadDB;
else if (arg == "--register-validity")
op = opRegisterValidity;
else if (arg == "--check-validity")