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2016-04-08 Make LocalStore thread-safeEelco Dolstra1-15/+16
Necessary for multi-threaded commands like "nix verify-paths".
2016-02-24 deletePath(): Succeed if path doesn't existEelco Dolstra1-1/+1
Also makes it robust against concurrent deletions.
2016-02-24 Eliminate reserveSpace flagEelco Dolstra1-0/+3
2016-02-11 Move addPermRoot into StoreEelco Dolstra1-4/+4
2016-02-04 StoreAPI -> StoreEelco Dolstra1-1/+1
Calling a class an API is a bit redundant...
2016-02-04 Eliminate the "store" global variableEelco Dolstra1-26/+23
Also, move a few free-standing functions into StoreAPI and Derivation. Also, introduce a non-nullable smart pointer, ref<T>, which is just a wrapper around std::shared_ptr ensuring that the pointer is never null. (For reference-counted values, this is better than passing a "T&", because the latter doesn't maintain the refcount. Usually, the caller will have a shared_ptr keeping the value alive, but that's not always the case, e.g., when passing a reference to a std::thread via std::bind.)
2015-07-17 OCD: foreach -> C++11 ranged forEelco Dolstra1-22/+21
2015-06-30 GC: Handle ENOSPC creating/moving to the trash directoryEelco Dolstra1-8/+23
Issue #564.
2015-03-06 Fix typos: s/the the/the/Daniel Hahler1-1/+1
2014-12-12 Ensure we're writing to stderr in the builderEelco Dolstra1-2/+2
http://hydra.nixos.org/build/17862041
2014-11-19 Disable vacuuming the DB after garbage collectionEelco Dolstra1-1/+1
Especially in WAL mode on a highly loaded machine, this is not a good idea because it results in a WAL file of approximately the same size ad the database, which apparently cannot be deleted while anybody is accessing it.
2014-11-19 Clean up temp roots in a more C++ wayEelco Dolstra1-26/+0
2014-11-04 nix-store --gc: Don't warn about missing manifests directoryEelco Dolstra1-1/+2
2014-10-03 Remove some duplicate codeEelco Dolstra1-6/+2
2014-08-20 Use proper quotes everywhereEelco Dolstra1-36/+36
2014-08-13 Use regular file GC roots if possibleEelco Dolstra1-1/+4
This makes hydra-eval-jobs create roots as regular files. See 1c208f2b7ef8ffb5e6d435d703dad83223a67bd6.
2014-08-01 findRoots(): Prevent a call to lstat()Eelco Dolstra1-9/+14
This means that getting the roots from /nix/var/nix/.../hydra-roots doesn't need any I/O other than reading the directory.
2014-08-01 Make readDirectory() return inode / file typeEelco Dolstra1-8/+6
2014-08-01 Allow regular files as GC rootsEelco Dolstra1-0/+6
If a root is a regular file, then its name must denote a store path. For instance, the existence of the file /nix/var/nix/gcroots/per-user/eelco/hydra-roots/wzc3cy1wwwd6d0dgxpa77ijr1yp50s6v-libxml2-2.7.7 would cause /nix/store/wzc3cy1wwwd6d0dgxpa77ijr1yp50s6v-libxml2-2.7.7 to be a root. This is useful because it involves less I/O (no need for a readlink() call) and takes up less disk space (the symlink target typically takes up a full disk block, while directory entries are packed more efficiently). This is particularly important for hydra.nixos.org, which has hundreds of thousands of roots, and where reading the roots can take 25 minutes.
2014-03-30 boost::shared_ptr -> std::shared_ptrEelco Dolstra1-3/+1
2014-02-27 Set up a minimal /dev in chrootsEelco Dolstra1-7/+5
Not bind-mounting the /dev from the host also solves the problem with /dev/shm being a symlink to something not in the chroot.
2014-01-21 Fix some clang warningsEelco Dolstra1-2/+0
2013-12-10 Garbage collector: Release locks on temporary root filesEelco Dolstra1-0/+1
This allows processes waiting for such locks to proceed during the trash deletion phase of the garbage collector.
2013-11-14 Remove nix-setuid-helperEelco Dolstra1-1/+1
AFAIK, nobody uses it, it's not maintained, and it has no tests.
2013-10-22 For auto roots, show the intermediate linkEelco Dolstra1-1/+1
I.e. "nix-store -q --roots" will now show (for example) /home/eelco/Dev/nixpkgs/result rather than /nix/var/nix/gcroots/auto/53222qsppi12s2hkap8dm2lg8xhhyk6v
2013-07-12 Garbage collector: Don't follow symlinks arbitrarilyEelco Dolstra1-41/+39
Only indirect roots (symlinks to symlinks to the Nix store) are now supported.
2013-04-26 addAdditionalRoots(): Check each path only onceEelco Dolstra1-2/+2
2013-03-08 Revert "Prevent config.h from being clobbered"Eelco Dolstra1-1/+4
This reverts commit 28bba8c44f484eae38e8a15dcec73cfa999156f6.
2013-03-07 Prevent config.h from being clobberedEelco Dolstra1-4/+1
2013-01-05 Delete a left-over trash directory before doing a GCEelco Dolstra1-1/+4
2013-01-04 Fix "0 store paths deleted" messageEelco Dolstra1-0/+2
2013-01-03 Clear any immutable bits in the Nix storeEelco Dolstra1-2/+0
Doing this once makes subsequent operations like garbage collecting more efficient since we don't have to call makeMutable() first.
2012-12-20 Yet another rewrite of the garbage collectorEelco Dolstra1-130/+133
But this time it's *obviously* correct! No more segfaults due to infinite recursions for sure, etc. Also, move directories to /nix/store/trash instead of renaming them to /nix/store/bla-gc-<pid>. Then we can just delete /nix/store/trash at the end.
2012-12-19 If gc-keep-derivations is set, only keep the actual deriverEelco Dolstra1-1/+1
This prevents zillions of derivations from being kept, and fixes an infinite recursion in the garbage collector (due to an obscure cycle that can occur with fixed-output derivations).
2012-09-19 Templatise tokenizeString()Eelco Dolstra1-1/+1
2012-09-13 Vacuum the SQLite DB after running the garbage collectorEelco Dolstra1-0/+3
2012-09-13 Delete paths in a component in topologically sorted orderEelco Dolstra1-1/+3
The outputs of a derivation can refer to each other (even though they cannot have cycles), so they have to be deleted in the right order. http://hydra.nixos.org/build/3026118
2012-09-12 Handle gc-keep-outputs and gc-keep-derivations both enabledEelco Dolstra1-94/+97
If the options gc-keep-outputs and gc-keep-derivations are both enabled, you can get a cycle in the liveness graph. There was a hack to handle this, but it didn't work with multiple-output derivations, causing the garbage collector to fail with errors like ‘error: cannot delete path `...' because it is in use by `...'’. The garbage collector now handles strongly connected components in the liveness graph as a unit and decides whether to delete all or none of the paths in an SCC.
2012-08-27 Merge branch 'master' into no-manifestsEelco Dolstra1-8/+24
2012-08-05 Handle amount of disk space saved by hard linking being negativeEelco Dolstra1-2/+2
Fixes bogus messages like "currently hard linking saves 17592186044416.00 MiB".
2012-08-01 Count bytes freed deleting unused linksEelco Dolstra1-2/+4
2012-08-01 Drop the block count in the garbage collectorEelco Dolstra1-3/+2
2012-08-01 nix-store --gc: Make ‘--max-freed 0’ do the right thingEelco Dolstra1-2/+2
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 linkingEelco Dolstra1-1/+16
2012-07-30 Refactor settings processingEelco Dolstra1-39/+39
Put all Nix configuration flags in a Settings object.
2012-07-23 Garbage collect unused links in /nix/store/.linksEelco Dolstra1-0/+37
Incremental optimisation requires creating links in /nix/store/.links to all files in the store. However, this means that if we delete a store path, no files are actually deleted because links in /nix/store/.links still exists. So we need to check /nix/store/.links for files with a link count of 1 and delete them.
2012-04-16 Fix obscure race condition in GC root creationEelco Dolstra1-16/+18
This should fix rare Hydra errors of the form: error: symlinking `/nix/var/nix/gcroots/per-user/hydra/hydra-roots/7sfhs5fdmjxm8sqgcpd0pgcsmz1kq0l0-nixos-iso-0.1pre33785-33795' to `/nix/store/7sfhs5fdmjxm8sqgcpd0pgcsmz1kq0l0-nixos-iso-0.1pre33785-33795': File exists
2012-03-26 Mac OS X fixEelco Dolstra1-0/+3
2012-03-26 Delete non-directory valid paths right awayEelco Dolstra1-16/+27
It's unlikely that rename() is faster than unlink() on a regular file or symlink, so don't bother.
2012-03-26 Make the garbage collector more concurrentEelco Dolstra1-11/+42
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.