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store: support reinit

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Support reinitializing, based on some current store. This is useful for
upgrading. Note that this is only the backend implementation + tests.
This commit is contained in:
Dirk-Jan C. Binnema
2022-09-28 22:38:06 +03:00
parent 9e60ebb683
commit 5367122c08
3 changed files with 84 additions and 44 deletions
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53
lib/mu-store.cc
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@ -303,44 +303,31 @@ Store::Private::find_message_unlocked(Store::Id docid) const
Store::Store(const std::string& path, Store::Options opts)
: priv_{std::make_unique<Private>(path, none_of(opts & Store::Options::Writable))}
{
if (properties().schema_version == ExpectedSchemaVersion)
return; // all is good.
if (none_of(opts & Store::Options::Writable) &&
any_of(opts & Store::Options::ReInit))
throw Mu::Error(Error::Code::InvalidArgument,
"Options::ReInit requires Options::Writable");
// Now, it seems the schema versions do not match; shall we automatically
// update?
if (none_of(opts & Store::Options::AutoUpgrade)) {
// not allowed to auto-upgrade, so we give up.
throw Mu::Error(Error::Code::SchemaMismatch,
"expected schema-version %s, but got %s; "
"cannot auto-upgrade; please use 'mu init'",
ExpectedSchemaVersion,
properties().schema_version.c_str());
if (any_of(opts & Store::Options::ReInit)) {
/* user wants to re-initialize an existing store */
Config conf{};
conf.batch_size = properties().batch_size;
conf.max_message_size = properties().max_message_size;
const auto root_maildir{properties().root_maildir};
const auto addrs{properties().personal_addresses};
/* close the old one */
this->priv_.reset();
/* and create a new one. */
Store new_store(path, root_maildir, addrs, conf);
this->priv_ = std::move(new_store.priv_);
}
// Okay, let's attempt an auto-upgrade.
g_info("attempt reinit database from schema %s --> %s",
properties().schema_version.c_str(), ExpectedSchemaVersion);
Config conf;
conf.batch_size = properties().batch_size;
conf.max_message_size = properties().max_message_size;
priv_.reset();
priv_ = std::make_unique<Private>(path,
properties().root_maildir,
properties().personal_addresses,
conf);
// Now let's try again.
priv_.reset();
priv_ = std::make_unique<Private>(path, none_of(opts & Store::Options::Writable));
/* otherwise, the schema version should match. */
if (properties().schema_version != ExpectedSchemaVersion)
// Nope, we failed.
throw Mu::Error(Error::Code::SchemaMismatch,
"failed to auto-upgrade from %s to %s; "
"please use 'mu init'",
properties().schema_version.c_str(),
ExpectedSchemaVersion);
"expected schema-version %s, but got %s",
ExpectedSchemaVersion,
properties().schema_version.c_str());
}
Store::Store(const std::string& path,