diff options
Diffstat (limited to 'doc/manual/src/release-notes/rl-0.12.md')
-rw-r--r-- | doc/manual/src/release-notes/rl-0.12.md | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/doc/manual/src/release-notes/rl-0.12.md b/doc/manual/src/release-notes/rl-0.12.md index 3a4aba07d..7042abb4c 100644 --- a/doc/manual/src/release-notes/rl-0.12.md +++ b/doc/manual/src/release-notes/rl-0.12.md @@ -7,23 +7,23 @@ Nix process crashes; no write access is needed for read-only operations; no more running out of Berkeley DB locks on certain operations. - + You still need to compile Nix with Berkeley DB support if you want Nix to automatically convert your old Nix store to the new schema. If you don’t need this, you can build Nix with the `configure` option `--disable-old-db-compat`. - + After the automatic conversion to the new schema, you can delete the old Berkeley DB files: - + $ cd /nix/var/nix/db $ rm __db* log.* derivers references referrers reserved validpaths DB_CONFIG - + The new metadata is stored in the directories `/nix/var/nix/db/info` and `/nix/var/nix/db/referrer`. Though the metadata is stored in human-readable plain-text files, they are not intended to be human-editable, as Nix is rather strict about the format. - + The new storage schema may or may not require less disk space than the Berkeley DB environment, mostly depending on the cluster size of your file system. With 1 KiB clusters (which seems to be the `ext3` @@ -50,11 +50,11 @@ last access time. This allows non-recently used stuff to be deleted. The option `--max-atime time` specifies an upper limit to the last accessed time of paths that may be deleted. For instance, - - ``` + + ``` $ nix-store --gc -v --max-atime $(date +%s -d "2 months ago") ``` - + deletes everything that hasn’t been accessed in two months. - `nix-env` now uses optimistic profile locking when performing an @@ -73,7 +73,7 @@ now always shown by `nix-env`, `nix-store -r` and `nix-build`. The total download size of substitutable paths is now also shown. For instance, a build will show something like - + the following derivations will be built: /nix/store/129sbxnk5n466zg6r1qmq1xjv9zymyy7-activate-configuration.sh.drv /nix/store/7mzy971rdm8l566ch8hgxaf89x7lr7ik-upstart-jobs.drv @@ -84,24 +84,24 @@ ... - Language features: - + - @-patterns as in Haskell. For instance, in a function definition - + f = args @ {x, y, z}: ...; - + `args` refers to the argument as a whole, which is further pattern-matched against the attribute set pattern `{x, y, z}`. - + - “`...`” (ellipsis) patterns. An attribute set pattern can now say `...` at the end of the attribute name list to specify that the function takes *at least* the listed attributes, while ignoring additional attributes. For instance, - + {stdenv, fetchurl, fuse, ...}: ... - + defines a function that accepts any attribute set that includes at least the three listed attributes. - + - New primops: `builtins.parseDrvName` (split a package name string like `"nix-0.12pre12876"` into its name and version components, e.g. `"nix"` and `"0.12pre12876"`), |