lix -

Age	Commit message (Collapse)	Author
2015-11-09	optimizePath(): Detect some .links corruption	Eelco Dolstra
	If automatic store optimisation is enabled, and a hard-linked file in the store gets corrupted, then the corresponding .links entry will also be corrupted. In that case, trying to repair with --repair or --repair-path won't work, because the new "good" file will be replaced by a hard link to the corrupted file. We can catch most of these cases by doing a sanity-check on the file sizes.
2015-07-17	OCD: foreach -> C++11 ranged for	Eelco Dolstra

2014-12-14	Pedantry	Eelco Dolstra

2014-12-09	Explicitly include required C headers	Marko Durkovic

2014-09-01	Add an 'optimiseStore' remote procedure call.	Ludovic Courtès

2014-08-20	Use proper quotes everywhere	Eelco Dolstra

2014-05-15	lvlInfo -> lvlTalkative	Eelco Dolstra

2014-05-15	nix-store --optimise: Remove bogus statistics	Eelco Dolstra

2014-05-15	Remove tab	Eelco Dolstra

2014-05-15	Shortcut store files before lstat	Wout Mertens
	readdir() already returns the inode numbers, so we don't need to call lstat to know if a file was already linked or not.
2014-05-14	Use the inodes given by readdir directly	Wout Mertens

2014-05-13	Preload linked hashes to speed up lookups	Wout Mertens
	By preloading all inodes in the /nix/store/.links directory, we can quickly determine of a hardlinked file was already linked to the hashed links. This is tolerant of removing the .links directory, it will simply recalculate all hashes in the store.
2014-05-10	Shortcut already-hardlinked files	wmertens
	If an inode in the Nix store has more than 1 link, it probably means that it was linked into .links/ by us. If so, skip. There's a possibility that something else hardlinked the file, so it would be nice to be able to override this. Also, by looking at the number of hardlinks for each of the files in .links/, you can get deduplication numbers and space savings.
2013-03-08	Revert "Prevent config.h from being clobbered"	Eelco Dolstra
	This reverts commit 28bba8c44f484eae38e8a15dcec73cfa999156f6.
2013-03-07	Prevent config.h from being clobbered	Eelco Dolstra

2013-02-27	Refactoring: Split off the non-recursive canonicalisePathMetaData()	Eelco Dolstra
	Also, change the file mode before changing the owner. This prevents a slight time window in which a setuid binary would be setuid root.
2013-02-26	Security: Don't allow builders to change permissions on files they don't own	Eelco Dolstra
	It turns out that in multi-user Nix, a builder may be able to do ln /etc/shadow $out/foo Afterwards, canonicalisePathMetaData() will be applied to $out/foo, causing /etc/shadow's mode to be set to 444 (readable by everybody but writable by nobody). That's obviously Very Bad. Fortunately, this fails in NixOS's default configuration because /nix/store is a bind mount, so "ln" will fail with "Invalid cross-device link". It also fails if hard-link restrictions are enabled, so a workaround is: echo 1 > /proc/sys/fs/protected_hardlinks The solution is to check that all files in $out are owned by the build user. This means that innocuous operations like "ln ${pkgs.foo}/some-file $out/" are now rejected, but that already failed in chroot builds anyway.
2013-01-03	Clear any immutable bits in the Nix store	Eelco Dolstra
	Doing this once makes subsequent operations like garbage collecting more efficient since we don't have to call makeMutable() first.
2012-09-19	Remove setting of the immutable bit	Eelco Dolstra
	Using the immutable bit is problematic, especially in conjunction with store optimisation. For instance, if the garbage collector deletes a file, it has to clear its immutable bit, but if the file has additional hard links, we can't set the bit afterwards because we don't know the remaining paths. So now that we support having the entire Nix store as a read-only mount, we may as well drop the immutable bit. Unfortunately, we have to keep the code to clear the immutable bit for backwards compatibility.
2012-08-27	Merge branch 'master' into no-manifests	Eelco Dolstra

2012-08-07	Don't warn about maximum link count exceeded on 0-byte files	Eelco Dolstra

2012-08-05	Fix race condition when two processes create a hard link to a file in .links	Eelco Dolstra
	This is a problem because one process may set the immutable bit before the second process has created its link. Addressed random Hydra failures such as: error: cannot rename `/nix/store/.tmp-link-17397-1804289383' to `/nix/store/rsvzm574rlfip3830ac7kmaa028bzl6h-nixos-0.1pre-git/upstart-interface-version': Operation not permitted
2012-08-05	Fix race condition when two processes create the same link in /nix/store/.links	Eelco Dolstra

2012-08-01	Merge branch 'master' into no-manifests	Eelco Dolstra

2012-08-01	Doh	Eelco Dolstra

2012-08-01	Make ‘nix-store --optimise’ interruptible	Eelco Dolstra

2012-07-30	Refactor settings processing	Eelco Dolstra
	Put all Nix configuration flags in a Settings object.
2012-07-26	Merge branch 'master' into no-manifests	Eelco Dolstra

2012-07-23	Handle platforms that don't support linking to a symlink	Eelco Dolstra
	E.g. Darwin doesn't allow this.
2012-07-23	Unlink the right file	Eelco Dolstra

2012-07-23	Automatically optimise the Nix store when a new path is added	Eelco Dolstra
	Auto-optimisation is enabled by default. It can be turned off by setting auto-optimise-store to false in nix.conf.
2012-07-23	optimiseStore(): Use a content-addressed file store in /nix/store/.links	Eelco Dolstra
	optimiseStore() now creates persistent, content-addressed hard links in /nix/store/.links. For instance, if it encounters a file P with hash H, it will create a hard link P' = /nix/store/.link/<H> to P if P' doesn't already exist; if P' exist, then P is replaced by a hard link to P'. This is better than the previous in-memory map, because it had the tendency to unnecessarily replace hard links with a hard link to whatever happened to be the first file with a given hash it encountered. It also allows on-the-fly, incremental optimisation.
2012-07-11	Rename queryValidPaths() to queryAllValidPaths()	Eelco Dolstra

2012-02-15	On Linux, make the Nix store really read-only by using the immutable bit	Eelco Dolstra
	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.
2010-11-16	* Store the size of a store path in the database (to be precise, the	Eelco Dolstra
	size of the NAR serialisation of the path, i.e., `nix-store --dump PATH'). This is useful for Hydra.
2010-06-04	* Applied a patch from David Brown to prevent `nix-store --optimise'	Eelco Dolstra
	from failing on rename() on BtrFS.
2009-09-24	* And some more.	Eelco Dolstra

2009-04-21	* Use foreach in a lot of places.	Eelco Dolstra

2008-06-18	* `nix-store --optimise': handle files with >= 32000 hard links.	Eelco Dolstra
	(There can easily be more than 32000 occurrences of the empty file.)
2008-06-18	* Some refactoring: put the GC options / results in separate structs.	Eelco Dolstra
	* The garbage collector now also prints the number of blocks freed.
2008-06-09	* Merged the no-bdb branch (-r10900:HEAD	Eelco Dolstra
	https://svn.nixos.org/repos/nix/nix/branches/no-bdb).