lix -

Age	Commit message (Collapse)	Author
2012-08-27	Disable the binary cache substituter by default for now	Eelco Dolstra

2012-08-27	Fix stupid type error in calling std::max	Eelco Dolstra

2012-08-27	Add libwww-curl-perl to the Debian/Ubuntu images	Eelco Dolstra

2012-08-27	Add WWW::Curl to the RPM dependencies	Eelco Dolstra

2012-08-27	Add perl-WWW-Curl to the RPM image	Eelco Dolstra

2012-08-27	Whitespace	Eelco Dolstra

2012-08-27	Drop dependency on List::MoreUtils	Eelco Dolstra

2012-08-27	Add missing file	Eelco Dolstra

2012-08-27	Merge branch 'master' into no-manifests	Eelco Dolstra

2012-08-24	Include the output name in the GC root link	Eelco Dolstra
	Output names are now appended to resulting GC symlinks, e.g. by nix-build. For backwards compatibility, if the output is named "out", nothing is appended. E.g. doing "nix-build -A foo" on a derivation that produces outputs "out", "bin" and "dev" will produce symlinks "./result", "./result-bin" and "./result-dev", respectively.
2012-08-22	Receive reserveSpace before calling startWork()	Eelco Dolstra
	Otherwise we can get a SIGPOLL. Reported by Ludovic.
2012-08-20	Check if MS_PRIVATE is defined	Eelco Dolstra
	http://hydra.nixos.org/build/2955671
2012-08-20	In the chroot, make all mounted filesystems private	Eelco Dolstra
	This is required on systemd, which mounts filesystems as "shared" subtrees. Changes to shared trees in a private mount namespace are propagated to the outside world, which is bad.
2012-08-20	Don't bind-mount /proc since we mount our own	Eelco Dolstra

2012-08-19	Fix 1755 permission on temporary directories left behind by ‘-K’	Eelco Dolstra

2012-08-13	Avoid concatenating lists of one string	Eelco Dolstra

2012-08-13	Don't allocate empty lists	Eelco Dolstra
	This saves about 4 MB when evaluating a NixOS system configuration.
2012-08-13	Optimise concatenating a list to an empty list	Eelco Dolstra
	More precisely, in concatLists, if all lists except one are empty, then just return the non-empty list. This reduces the number of list element allocations by 32% when evaluating a NixOS system configuration.
2012-08-13	Add a primop ‘elemAt’ to get an element from a list	Eelco Dolstra

2012-08-13	Add a primop ‘concatLists’	Eelco Dolstra
	This can serve as a generic efficient list builder. For instance, the function ‘catAttrs’ in Nixpkgs can be rewritten from attr: l: fold (s: l: if hasAttr attr s then [(getAttr attr s)] ++ l else l) [] l to attr: l: builtins.concatLists (map (s: if hasAttr attr s then [(getAttr attr s)] else []) l) Statistics before: time elapsed: 1.08683 size of a value: 24 environments allocated: 1384376 (35809568 bytes) list elements: 6946783 (55574264 bytes) list concatenations: 37434 values allocated: 1760440 (42250560 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18273 number of thunks: 1297673 number of thunks avoided: 1380759 number of attr lookups: 430802 number of primop calls: 628912 number of function calls: 1333544 Statistics after (including new catAttrs): time elapsed: 0.959854 size of a value: 24 environments allocated: 1010198 (26829296 bytes) list elements: 1984878 (15879024 bytes) list concatenations: 30488 values allocated: 1589760 (38154240 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18274 number of thunks: 1040925 number of thunks avoided: 1038428 number of attr lookups: 438419 number of primop calls: 474844 number of function calls: 959366
2012-08-13	Provide an efficient implementation of ‘elem’	Eelco Dolstra
	The one in Nixpkgs is O(n^2), this one is O(n). Big reduction in the number of list allocations. Statistics before (on a NixOS system config): time elapsed: 1.17982 size of a value: 24 environments allocated: 1543334 (39624560 bytes) list elements: 9612638 (76901104 bytes) list concatenations: 37434 values allocated: 1854933 (44518392 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18272 number of thunks: 1392467 number of thunks avoided: 1507311 number of attr lookups: 430801 number of primop calls: 691600 number of function calls: 1492502 Statistics after: time elapsed: 1.08683 size of a value: 24 environments allocated: 1384376 (35809568 bytes) list elements: 6946783 (55574264 bytes) list concatenations: 37434 values allocated: 1760440 (42250560 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18273 number of thunks: 1297673 number of thunks avoided: 1380759 number of attr lookups: 430802 number of primop calls: 628912 number of function calls: 1333544
2012-08-13	Add a "filter" primop	Eelco Dolstra
	Evaluation of a NixOS configuration spends quite a lot of time in the "filter" function in Nixpkgs. As implemented in Nixpkgs, this is a O(n^2) operation, so it's a good candidate for providing a more efficient (i.e. primop) implementation. Using it gives a ~10% speed increase and a significant reduction in the number of evaluations. Statistics before (on a NixOS system config): time elapsed: 1.3258 size of a value: 24 environments allocated: 1980939 (50127080 bytes) list elements: 14679308 (117434464 bytes) list concatenations: 50828 values allocated: 2098938 (50374512 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18271 number of thunks: 1645752 number of thunks avoided: 1921196 number of attr lookups: 430798 number of primop calls: 838807 number of function calls: 1930107 Statistics after: time elapsed: 1.17982 size of a value: 24 environments allocated: 1543334 (39624560 bytes) list elements: 9612638 (76901104 bytes) list concatenations: 37434 values allocated: 1854933 (44518392 bytes) attribute sets allocated: 392040 right-biased unions: 186334 values copied in right-biased unions: 591137 symbols in symbol table: 18272 number of thunks: 1392467 number of thunks avoided: 1507311 number of attr lookups: 430801 number of primop calls: 691600 number of function calls: 1492502
2012-08-12	Add some more evaluations stats	Eelco Dolstra

2012-08-12	Add some basic profiling support to the evaluator	Eelco Dolstra
	Setting the environment variable NIX_COUNT_CALLS to 1 enables some basic profiling in the evaluator. It will count calls to functions and primops as well as evaluations of attributes. For example, to see where evaluation of a NixOS configuration spends its time: $ NIX_SHOW_STATS=1 NIX_COUNT_CALLS=1 ./src/nix-instantiate/nix-instantiate '<nixos>' -A system --readonly-mode ... calls to 39 primops: 239532 head 233962 tail 191252 hasAttr ... calls to 1595 functions: 224157 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:19' 221767 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:14' 221767 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:10' ... evaluations of 7088 attributes: 167377 undefined position 132459 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/attrsets.nix:119:41' 47322 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/attrsets.nix:13:21' ...
2012-08-07	Don't warn about maximum link count exceeded on 0-byte files	Eelco Dolstra

2012-08-05	Handle amount of disk space saved by hard linking being negative	Eelco Dolstra
	Fixes bogus messages like "currently hard linking saves 17592186044416.00 MiB".
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	Count bytes freed deleting unused links	Eelco Dolstra

2012-08-01	Drop the block count in the garbage collector	Eelco Dolstra

2012-08-01	nix-store --gc: Make ‘--max-freed 0’ do the right thing	Eelco Dolstra
	That is, delete almost nothing (it will still remove unused links from /nix/store/.links).
2012-08-01	removeUnusedLinks(): Print stats on disk space saved by hard linking	Eelco Dolstra

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

2012-08-01	nix-channel: Use binary caches advertised by channels	Eelco Dolstra
	Channels can now advertise a binary cache by creating a file <channel-url>/binary-cache-url. The channel unpacker puts these in its "binary-caches" subdirectory. Thus, the URLS of the binary caches for the channels added by root appear in /nix/var/nix/profiles/per-user/eelco/channels/binary-caches/*. The binary cache substituter reads these and adds them to the list of binary caches.
2012-08-01	Doh	Eelco Dolstra

2012-08-01	nix-env: Ignore manifest.nix when recursing into ~/.nix-defexpr	Eelco Dolstra
	Channels are implemented using a profile now, and profiles contain a manifest.nix file. This should be ignored to prevent bogus packages from showing up in nix-env.
2012-08-01	Use a GNU tar flag to shut up warnings about implausibly old timestamp	Eelco Dolstra

2012-08-01	Inline unpack-channel.sh	Eelco Dolstra

2012-08-01	Doh	Eelco Dolstra

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

2012-08-01	download-from-binary-cache: Remove duplicate URLs	Eelco Dolstra

2012-08-01	Report substituter errors to clients of the Nix daemon	Eelco Dolstra

2012-07-31	Allow daemon users to override ‘binary-caches’	Eelco Dolstra
	For security reasons, daemon users can only specify caches that appear in the ‘binary-caches’ and ‘trusted-binary-caches’ options in nix.conf.
2012-07-31	Prevent an injection attack in passing untrusted options to substituters	Eelco Dolstra

2012-07-31	Pass all --option flags to the daemon	Eelco Dolstra

2012-07-31	Add an option ‘build-fallback’ (equivalent to the --fallback flag)	Eelco Dolstra

2012-07-30	Manual: Remove reference to non-existent -I option	Eelco Dolstra

2012-07-30	Refactor settings processing	Eelco Dolstra
	Put all Nix configuration flags in a Settings object.
2012-07-30	Whitespace	Eelco Dolstra

2012-07-30	Do some validation of URLs	Eelco Dolstra