Commit graph

121 commits

Author SHA1 Message Date
Eelco Dolstra
1328aa3307 * Start of concurrent garbage collection. Processes write temporary
roots to a per-process temporary file in /nix/var/nix/temproots
  while holding a write lock on that file.  The garbage collector
  acquires read locks on all those files, thus blocking further
  progress in other Nix processes, and reads the sets of temporary
  roots.
2005-01-31 10:27:25 +00:00
Eelco Dolstra
c505702265 * Fix and simplify the garbage collector (it's still not concurrent,
though).  In particular it's now much easier to register a GC root.
  Just place a symlink to whatever store path it is that you want to
  keep in /nix/var/nix/gcroots.
2005-01-27 15:21:29 +00:00
Eelco Dolstra
066da4ab85 * Really fix the substitute mechanism, i.e., ensure the closure
invariant by registering references through the manifest.
* Added a test for nix-pull.
2005-01-25 17:08:52 +00:00
Eelco Dolstra
6ff48e77f6 * Set the Perl search path properly (reported by Roy van den Broek). 2005-01-19 21:55:02 +00:00
Eelco Dolstra
f3dc231250 * Removed the `id' attribute hack.
* Formalise the notion of fixed-output derivations, i.e., derivations
  for which a cryptographic hash of the output is known in advance.
  Changes to such derivations should not propagate upwards through the
  dependency graph.  Previously this was done by specifying the hash
  component of the output path through the `id' attribute, but this is
  insecure since you can lie about it (i.e., you can specify any hash
  and then produce a completely different output).  Now the
  responsibility for checking the output is moved from the builder to
  Nix itself.

  A fixed-output derivation can be created by specifying the
  `outputHash' and `outputHashAlgo' attributes, the latter taking
  values `md5', `sha1', and `sha256', and the former specifying the
  actual hash in hexadecimal or in base-32 (auto-detected by looking
  at the length of the attribute value).  MD5 is included for
  compatibility but should be considered deprecated.

* Removed the `drvPath' pseudo-attribute in derivation results.  It's
  no longer necessary.

* Cleaned up the support for multiple output paths in derivation store
  expressions.  Each output now has a unique identifier (e.g., `out',
  `devel', `docs').  Previously there was no way to tell output paths
  apart at the store expression level.

* `nix-hash' now has a flag `--base32' to specify that the hash should
  be printed in base-32 notation.

* `fetchurl' accepts parameters `sha256' and `sha1' in addition to
  `md5'.

* `nix-prefetch-url' now prints out a SHA-1 hash in base-32.  (TODO: a
  flag to specify the hash.)
2005-01-17 16:55:19 +00:00
Eelco Dolstra
9ee88bb2f2 * Use absolute paths. 2005-01-14 13:50:00 +00:00
Eelco Dolstra
b17e7cf979 * Script to remove patches from manifests. 2005-01-12 10:40:59 +00:00
Eelco Dolstra
0bc41f632b * Print out less garbage. 2005-01-12 10:37:18 +00:00
Eelco Dolstra
6af4a5a71f * Prototype store optimiser. It searched the Nix store for identical
files and hard-links them to each other to save disk space.

  Currently it doesn't actually do the hard-linking, it just reports
  the amount of space saved if it did.
2005-01-05 09:58:12 +00:00
Eelco Dolstra
c53898cb65 * If a patch already exists, it must still be included in the manifest. 2004-12-31 11:07:12 +00:00
Eelco Dolstra
35b76a81c4 * More instrumentation (statistics go to /nix/var/log/nix/downloads). 2004-12-30 17:19:47 +00:00
Eelco Dolstra
3745cecc6a * Fix handling of chained patches: don't skip patches if intermediate
paths are missing, etc.
2004-12-30 17:09:57 +00:00
Eelco Dolstra
581bcb986f * Some logging for evaluation. 2004-12-30 16:34:54 +00:00
Eelco Dolstra
6270aa727d * Propagate patches from the source distribution to the destination
distribution insofar they are applicable.
2004-12-29 22:17:26 +00:00
Eelco Dolstra
54d8f08588 * Reject patches larger than the full archives they produce. 2004-12-29 19:32:55 +00:00
Eelco Dolstra
2fdb27e7f2 * Atomic file replacement is good. 2004-12-29 19:04:21 +00:00
Eelco Dolstra
e1e9c036f9 * A utility to generate patches between releases based on their
manifests.
2004-12-29 18:58:15 +00:00
Eelco Dolstra
9022cf9adf * A small utility to add the Size and NarHash fields to old manifests. 2004-12-28 21:12:00 +00:00
Eelco Dolstra
4bf58d5379 * Added a function to write manifests. 2004-12-28 21:11:28 +00:00
Eelco Dolstra
3d1b2101cc * Place manifests in /nix/var/nix/manifests.
* Use the new patch downloader.
2004-12-20 16:38:50 +00:00
Eelco Dolstra
7eed57e784 * Sync with changed substitute mechanism.
* Accept the NarHash line.
* Clear substitutes in `nix-channel --update'.
2004-12-20 14:57:03 +00:00
Eelco Dolstra
4d25b0b0bb * Fix nix-pull. 2004-12-16 15:31:50 +00:00
Eelco Dolstra
77970f8daf * Remove `prebuilts.conf' file, it's not like anybody was using it.
* Add /nix/var/nix/manifests directory.
2004-12-16 14:31:49 +00:00
Eelco Dolstra
e3b051aeeb * Include the size of the bzipped archive (necessary for computing the
cheapest download path), as well as the hash of the contents of the
  path (necessary for checking patch applicability).
2004-12-13 16:56:18 +00:00
Eelco Dolstra
862f4c154e * Patch deployment. `download.pl' (intended to be used in the
substitute mechanism) creates a store path by downloading full NAR
  archives and/or patches specified in the available manifests.

  Any combination of present paths, full downloads, and patches can be
  used to construct the target path.  In particular, patches can be
  chained in sequence; and full NAR archives of the target path can be
  omitted (i.e., patch-only deployment is possible).  A shortest path
  algorithm is used to find the smallest set of files to be downloaded
  (the edge weights are currently file sizes, but one can imagine
  taking the network speed to the various source into account).

  Patches are binary deltas between two store paths.  To be precise,
  they are the output of the `bsdiff' program applied to the NAR
  archives obtained by dumping (`nix-store --dump') the two store
  paths.  The advantage of diff'ing NAR archives (and not, say, doing
  file-by-file diffs) is that file renames/moves are handled
  automatically.  The disadvantage is that we cannot optimise creation
  of unchanged files (by hard-linking).
2004-12-13 13:47:38 +00:00
Eelco Dolstra
dca48aed34 * Allow an optional hash to be provided. This prevents redundant
fetches.
2004-12-13 13:35:36 +00:00
Eelco Dolstra
feb3ceaee0 * Better error messages. 2004-11-04 20:20:39 +00:00
Eelco Dolstra
2aa1f4717b * Fix File exists' errors if the result' symlink exists but is
dangling.
2004-10-31 12:01:16 +00:00
Eelco Dolstra
2155c0a673 * Register channels as roots of the garbage collector (in
$(localstatedir)/nix/gcroots/channels). 
* In setuid installations, create gcroots/tmp and gcroots/channels
  group-writable.
2004-10-20 14:42:38 +00:00
Eelco Dolstra
88888160d2 * Fix nix-prefetch-url in setuid Nix installations. 2004-10-20 14:40:54 +00:00
Eelco Dolstra
99da51d4de * Show error messages from curl. 2004-10-20 14:05:48 +00:00
Eelco Dolstra
eb233e728f * `--min-age' flag in nix-store and nix-collect-garbage to only delete
unreachable paths that haven't been used for N hours.  For instance,
  `nix-collect-garbage --min-age 168' only deletes paths that haven't
  been accessed in the last week.

  This is useful for instance in the build farm where many derivations
  can be shared between consecutive builds, and we wouldn't want a
  garbage collect to throw them all away.  We could of course register
  them as roots, but then we'd to unregister them at some point, which
  would be a pain to manage.  The `--min-age' flag gives us a sort of
  MRU caching scheme.

  BUG: this really shouldn't be in gc.cc since that violates
  mechanism/policy separation.
2004-08-25 16:54:08 +00:00
Eelco Dolstra
fdec72c6cc * `nix-collect-garbage' now actually performs a garbage collection, it
doesn't just print the set of paths that should be deleted.  So
  there is no more need to pipe the result into `nix-store --delete'
  (which doesn't even exist anymore).
2004-08-25 15:39:13 +00:00
Eelco Dolstra
2d35116c13 * Setuid support for sharing a Nix installation between multiple
users.

  If the configure flag `--enable-setuid' is used, the Nix programs
  nix-env, nix-store, etc. are installed with the setuid bit turned on
  so that they are executed as the user and group specified by
  `--with-nix-user=USER' and `--with-nix-group=GROUP', respectively
  (with defaults `nix' and `nix').

  The setuid programs drop all special privileges if they are executed
  by a user who is not a member of the Nix group.

  The setuid feature is a quick hack to enable sharing of a Nix
  installation between users who trust each other.  It is not
  generally secure, since any user in the Nix group can modify (by
  building an appropriate derivation) any object in the store, and for
  instance inject trojans into binaries used by other users.

  The setuid programs are owned by root, not the Nix user.  This is
  because on Unix normal users cannot change the real uid, only the
  effective uid.  Many programs don't work properly when the real uid
  differs from the effective uid.  For instance, Perl will turn on
  taint mode.  However, the setuid programs drop all root privileges
  immediately, changing all uids and gids to the Nix user and group.
2004-08-20 14:49:05 +00:00
Eelco Dolstra
937ce0cd21 * Flag `--no-link' suppresses symlinking to the output path.
* Handle multiple derivations correctly.
2004-08-18 12:11:31 +00:00
Eelco Dolstra
e8a95108c0 * Nix-build places a symlink `result' in the current directory to the
store object just built.
2004-07-28 13:32:45 +00:00
Eelco Dolstra
d051cd40e1 * Nix-instantiate can return multiple store expressions. 2004-06-22 15:17:04 +00:00
Eelco Dolstra
3093af58a7 * A utility script `nix-build' that builds Nix expressions and prints
their output paths (and only that) on standard output.
2004-06-22 15:12:34 +00:00
Eelco Dolstra
37ee6cef99 * Adapted nix-pull to use the new substitute mechanism. 2004-06-21 09:51:23 +00:00
Eelco Dolstra
759c953196 * Look for GC roots in @localstatedir@/nix/gcroots. 2004-04-22 14:17:57 +00:00
Eelco Dolstra
21655a70f5 * Channels. These allow you to stay current with an evolving set of
Nix expressions.

  To subscribe to a channel (needs to be done only once):

    nix-channel --add \
      http://catamaran.labs.cs.uu.nl/dist/nix/channels/nixpkgs-unstable

  This just adds the given URL to ~/.nix-channels (which can also be
  edited manually).

  To update from all channels:

    nix-channel --update

  This fetches the latest expressions and pulls cache manifests.  The
  default Nix expression (~/.nix-defexpr) is made to point to the
  conjunction of the expressions downloaded from all channels.

  So to update all installed derivations in the current user
  environment:

    nix-channel --update
    nix-env --upgrade '*'

  If you are really courageous, you can put this in a cronjob or
  something.

  You can subscribe to multiple channels.  It is not entirely clear
  what happens when there are name clashes between derivations from
  different channels.  From nix-env/main.cc it appears that the one
  with the lowest (highest?) hash will be used, which is pretty
  meaningless.
2004-04-21 14:54:05 +00:00
Eelco Dolstra
7cce0c34e1 * Allow extra parameters to be passed to Curl through the `CURL_FLAGS'
environment variable.  This is useful for passing authentication
  information (it won't show up in `ps').  Hacky - nix-push should
  abstract over the use of Curl.
2004-04-15 15:14:16 +00:00
Eelco Dolstra
b275f2ed3b * `*.gcroot' files can now containing multiple roots. 2004-04-14 08:09:27 +00:00
Eelco Dolstra
153429520a * Distributed the wrong file. 2004-04-06 15:55:27 +00:00
Eelco Dolstra
03f1d1ecb5 * Switched from wget to curl.
* Made the dependencies on bzip2 and the shell explicit.
2004-04-06 08:18:51 +00:00
Eelco Dolstra
beda10f5a2 * Make perl a dependency of Nix. 2004-03-15 15:23:53 +00:00
Eelco Dolstra
7f0ed370da * Use $(storedir) instead of $(prefix)/store. 2004-02-20 11:32:30 +00:00
Eelco Dolstra
1ad9d11247 * Only include predecessors that are themselves being pushed.
Otherwise the substitute mechanism can break in subtle ways.
2004-02-13 10:43:31 +00:00
Eelco Dolstra
92e832348d * Lots of manual stuff. Reference pages for most Nix commands.
* nix-pull now requires the full url to the manifest, i.e.,
  `/MANIFEST/' is no longer automatically appended.
* nix-prefetch-url works again.
2004-02-10 16:14:47 +00:00
Eelco Dolstra
66e94d3275 * Improvements to profiles. Generations are now per-profile, e.g.,
default -> default-94-link
  default-82-link -> /nix/store/cc4480...
  default-83-link -> /nix/store/caeec8...
  ...
  default-94-link -> /nix/store/2896ca...
  experimental -> experimental-2-link
  experimental-1-link -> /nix/store/cc4480...
  experimental-2-link -> /nix/store/a3148f...

* `--profile' / `-p' -> `--switch-profile' / `-S'
* `--link' / `-l' -> `--profile' / `-p'
* The default profile is stored in $prefix/var/nix/profiles.
  $prefix/var/nix/links is gone.  Profiles can be stored anywhere.
* The current profile is now referenced from ~/.nix-profile, not
  ~/.nix-userenv.
* The roots to the garbage collector now have extension `.gcroot', not
  `.id'.
2004-02-06 10:30:20 +00:00