depot - monorepo for the virus lounge

Age	Commit message (Collapse)	Author	Files	Lines
2012-08-01	Report substituter errors to clients of the Nix daemon	Eelco Dolstra	1	-21/+37

2012-07-30	Refactor settings processing	Eelco Dolstra	1	-33/+31
	Put all Nix configuration flags in a Settings object.
2012-07-30	Pass configuration settings to the substituters	Eelco Dolstra	1	-0/+4
	Previously substituters could read nix.conf themselves, but this didn't take --option flags into account.
2012-07-30	Remove unused variables	Eelco Dolstra	1	-2/+0

2012-07-30	Fix whitespace	Eelco Dolstra	1	-71/+71

2012-07-26	Fix the substituter tests	Eelco Dolstra	1	-1/+2

2012-07-26	Merge branch 'master' into no-manifests	Eelco Dolstra	1	-9/+23

2012-07-23	Automatically optimise the Nix store when a new path is added	Eelco Dolstra	1	-0/+7
	Auto-optimisation is enabled by default. It can be turned off by setting auto-optimise-store to false in nix.conf.
2012-07-23	Use lutimes() if available to canonicalise the timestamp of symlinks	Eelco Dolstra	1	-9/+16
	Also use utimes() instead of utime() if lutimes() is not available.
2012-07-18	Merge branch 'master' into no-manifests	Eelco Dolstra	1	-0/+24

2012-07-17	Add function queryPathFromHashPart()	Eelco Dolstra	1	-0/+24
	To implement binary caches efficiently, Hydra needs to be able to map the hash part of a store path (e.g. "gbg...zr7") to the full store path (e.g. "/nix/store/gbg...kzr7-subversion-1.7.5"). (The binary cache mechanism uses hash parts as a key for looking up store paths to ensure privacy.) However, doing a search in the Nix store for /nix/store/<hash>* is expensive since it requires reading the entire directory. queryPathFromHashPart() prevents this by doing a cheap database lookup.
2012-07-11	Replace hasSubstitutes() with querySubstitutablePaths()	Eelco Dolstra	1	-5/+13
	querySubstitutablePaths() takes a set of paths, so this greatly reduces daemon <-> client latency.
2012-07-11	Add a function queryValidPaths()	Eelco Dolstra	1	-0/+9
	queryValidPaths() combines multiple calls to isValidPath() in one. This matters when using the Nix daemon because it reduces latency. For instance, on "nix-env -qas \*" it reduces execution time from 5.7s to 4.7s (which is indistinguishable from the non-daemon case).
2012-07-11	Rename queryValidPaths() to queryAllValidPaths()	Eelco Dolstra	1	-2/+2

2012-07-11	Implement querySubstitutablePathInfos() in the daemon	Eelco Dolstra	1	-12/+0
	Also removed querySubstitutablePathInfo().
2012-07-06	download-from-binary-cache: parallelise fetching of NAR info files	Eelco Dolstra	1	-20/+40
	Getting substitute information using the binary cache substituter has non-trivial latency overhead. A package or NixOS system configuration can have hundreds of dependencies, and in the worst case (when the local info cache is empty) we have to do a separate HTTP request for each of these. If the ping time to the server is t, getting N info files will take tN seconds; e.g., with a ping time of 0.1s to nixos.org, sequentially downloading 1000 info files (a typical NixOS config) will take at least 100 seconds. To fix this problem, the binary cache substituter can now perform requests in parallel. This required changing the substituter interface to support a function querySubstitutablePathInfos() that queries multiple paths at the same time, and rewriting queryMissing() to take advantage of parallelism. (Due to local caching, parallelising queryMissing() is sufficient for most use cases, since it's almost always called before building a derivation and thus fills the local info cache.) For example, parallelism speeds up querying all 1056 paths in a particular NixOS system configuration from 116s to 2.6s. It works so well because the eccentricity of the top-level derivation in the dependency graph is only 9. So we only need 10 round-trips (when using an unlimited number of parallel connections) to get everything. Currently we do a maximum of 150 parallel connections to the server. Thus it's important that the binary cache server (e.g. nixos.org) has a high connection limit. Alternatively we could use HTTP pipelining, but WWW::Curl doesn't support it and libcurl has a hard-coded limit of 5 requests per pipeline.
2012-05-29	Reserve some disk space for the garbage collector	Eelco Dolstra	1	-1/+19
	We can't open a SQLite database if the disk is full. Since this prevents the garbage collector from running when it's most needed, we reserve some dummy space that we can free just before doing a garbage collection. This actually revives some old code from the Berkeley DB days. Fixes #27.
2012-04-23	Merge pull request #2 from viric/master	Eelco Dolstra	1	-0/+6
	Again, adding the sync option
2012-03-26	Make the garbage collector more concurrent	Eelco Dolstra	1	-6/+1
	Make the garbage collector more concurrent by deleting valid paths outside the region where we're holding the global GC lock. This should greatly reduce the time during which new builds are blocked, since the deletion accounts for the vast majority of the time spent in the GC. To ensure that this is safe, the valid paths are invalidated and renamed to some arbitrary path while we're holding the lock. This ensures that we when we finally delete the path, it's not a (newly) valid or locked path.
2012-03-22	Fixing the default of sync-before-registering	Lluís Batlle i Rossell	1	-1/+5
	Setting 'false' as default, as suggested by Eelco. I also added a comment about the setting in the code.
2012-03-22	Adding a nix option to sync before registering a path, for non-ext*	Lluís Batlle i Rossell	1	-0/+2
	filesystems.
2012-03-20	nix-store --clear-failed-paths: Clear derivation outputs	Eelco Dolstra	1	-1/+3
	If the argument to ‘nix-store --clear-failed-paths’ is a derivation, then clear the failed state of its outputs.
2012-03-05	Restore progress indication during nix-copy-closure	Eelco Dolstra	1	-0/+2

2012-03-01	Remove dependency on sqlite3_table_column_metadata	Eelco Dolstra	1	-7/+0
	Not all SQLite builds have the function sqlite3_table_column_metadata. We were only using it in a schema upgrade check for compatibility with databases that were probably never seen in the wild. So remove it.
2012-02-15	On Linux, make the Nix store really read-only by using the immutable bit	Eelco Dolstra	1	-0/+7
	I was bitten one time too many by Python modifying the Nix store by creating *.pyc files when run as root. On Linux, we can prevent this by setting the immutable bit on files and directories (as in ‘chattr +i’). This isn't supported by all filesystems, so it's not an error if setting the bit fails. The immutable bit is cleared by the garbage collector before deleting a path. The only tricky aspect is in optimiseStore(), since it's forbidden to create hard links to an immutable file. Thus optimiseStore() temporarily clears the immutable bit before creating the link.
2012-02-15	Fix a broken guard around utime()	Eelco Dolstra	1	-2/+5
	Because of an outdated check for a timestamp of 0, we were calling utime() even when it wasn't necessary.
2011-12-30	* Reject a build if there is a cycle among the outputs. This is	Eelco Dolstra	1	-0/+8
	necessary because existing code assumes that the references graph is acyclic.
2011-12-16	* Sync with the trunk.	Eelco Dolstra	1	-20/+46

2011-12-16	* importPath() -> importPaths(). Because of buffering of the input	Eelco Dolstra	1	-2/+15
	stream it's now necessary for the daemon to process the entire sequence of exported paths, rather than letting the client do it.
2011-12-16	* Make the import operation through the daemon much more efficient	Eelco Dolstra	1	-3/+4
	(way fewer roundtrips) by allowing the client to send data in bigger chunks. * Some refactoring.
2011-12-15	* Refactoring: move sink/source buffering into separate classes.	Eelco Dolstra	1	-6/+3
	* Buffer the HashSink. This speeds up hashing a bit because it prevents lots of calls to the hash update functions (e.g. nix-hash went from 9.3s to 8.7s of user time on the closure of my /var/run/current-system).
2011-12-05	* Remove unnecessary quotes. showPaths() already adds quotes.	Eelco Dolstra	1	-1/+1

2011-12-02	* In ‘nix-store --verify --check-contents’, repair missing hashes	Eelco Dolstra	1	-4/+20
	rather than complain about them.
2011-11-23	* Add an API function exportPaths() that provides the functionality of	Eelco Dolstra	1	-1/+1
	‘nix-store --export’. * Add a Perl module that provides the functionality of ‘nix-copy-closure --to’. This is used by build-remote.pl so it no longer needs to start a separate nix-copy-closure process. Also, it uses the Perl API to do the export, so it doesn't need to start a separate nix-store process either. As a result, nix-copy-closure and build-remote.pl should no longer fail on very large closures due to an "Argument list too long" error. (Note that having very many dependencies in a single derivation can still fail because the environment can become too large. Can't be helped though.)
2011-11-07	* Boldly make SQLite WAL mode the default again. Hopefully the	Eelco Dolstra	1	-4/+3
	intermittent problems are gone by now. WAL mode is preferrable because it does way fewer fsyncs.
2011-11-06	Include all outputs of derivations in the closure of explicitly-passed ↵	Shea Levy	1	-0/+22
	derivation paths This required adding a queryOutputDerivationNames function in the store API
2011-09-12	* Ouch. A store upgrade could cause a substituter to be triggered,	Eelco Dolstra	1	-3/+3
	causing a deadlock.
2011-08-31	* Eliminate all uses of the global variable ‘store’ from libstore.	Eelco Dolstra	1	-1/+1
	This should also fix: nix-instantiate: ./../boost/shared_ptr.hpp:254: T* boost::shared_ptr<T>::operator->() const [with T = nix::StoreAPI]: Assertion `px != 0' failed. which was caused by hashDerivationModulo() calling the ‘store’ object (during store upgrades) before openStore() assigned it.
2011-07-20	* Fix a huuuuge security hole in the Nix daemon. It didn't check that	Eelco Dolstra	1	-0/+51
	derivations added to the store by clients have "correct" output paths (meaning that the output paths are computed by hashing the derivation according to a certain algorithm). This means that a malicious user could craft a special .drv file to build any desired path in the store with any desired contents (so long as the path doesn't already exist). Then the attacker just needs to wait for a victim to come along and install the compromised path. For instance, if Alice (the attacker) knows that the latest Firefox derivation in Nixpkgs produces the path /nix/store/1a5nyfd4ajxbyy97r1fslhgrv70gj8a7-firefox-5.0.1 then (provided this path doesn't already exist) she can craft a .drv file that creates that path (i.e., has it as one of its outputs), add it to the store using "nix-store --add", and build it with "nix-store -r". So the fake .drv could write a Trojan to the Firefox path. Then, if user Bob (the victim) comes along and does $ nix-env -i firefox $ firefox he executes the Trojan injected by Alice. The fix is to have the Nix daemon verify that derivation outputs are correct (in addValidPath()). This required some refactoring to move the hash computation code to libstore.
2010-12-17	* Do a short sleep after SQLITE_BUSY.	Eelco Dolstra	1	-0/+11

2010-12-14	* I forgot to catch SQLiteBusy in registerValidPaths(). So	Eelco Dolstra	1	-38/+31
	registerValidPaths() now handles busy errors and registerValidPath() is simply a wrapper around it.
2010-12-13	* Create /nix/var/nix/db if it's missing.	Eelco Dolstra	1	-0/+1

2010-12-08	* Ignore the result of sqlite3_reset().	Eelco Dolstra	1	-3/+4

2010-12-06	* `nix-store --verify --check-contents': don't hold the global GC lock	Eelco Dolstra	1	-11/+46
	while checking the contents, since this operation can take a very long time to finish. Also, fill in missing narSize fields in the DB while doing this.
2010-12-05	* Retry a transaction if SQLite returns SQLITE_BUSY. This can happen	Eelco Dolstra	1	-61/+83
	even with a very long busy timeout, because SQLITE_BUSY is also returned to resolve deadlocks. This should get rid of random "database is locked" errors. This is kind of hard to test though. * Fix a horrible bug in deleteFromStore(): deletePathWrapped() should be called after committing the transaction, not before, because the commit might not succeed.
2010-11-17	* Before a build, show the disk space that the downloaded store paths	Eelco Dolstra	1	-0/+1
	will approximately require.
2010-11-17	* Add an operation `nix-store -q --size'.	Eelco Dolstra	1	-2/+12

2010-11-16	* Store the size of a store path in the database (to be precise, the	Eelco Dolstra	1	-26/+46
	size of the NAR serialisation of the path, i.e., `nix-store --dump PATH'). This is useful for Hydra.
2010-10-14	* Wrap deleteFromStore() in a transaction. Otherwise there might be a	Eelco Dolstra	1	-5/+8
	race with other processes that add new referrers to a path, resulting in the garbage collector crashing with "foreign key constraint failed". (Nix/4) * Make --gc --print-dead etc. interruptible.
2010-09-01	* Only do "pragma journal_mode = ..." if the current journal mode	Eelco Dolstra	1	-1/+10
	differs from the desired mode. There is an open SQLite ticket `Executing "PRAGMA journal_mode" may delete journal file while it is in use.'