Commit graph

160 commits

Author SHA1 Message Date
Eelco Dolstra
5170c5691a nix-channel: Use binary caches advertised by channels
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 17:56:11 -04:00
Eelco Dolstra
46f852cda0 Use a GNU tar flag to shut up warnings about implausibly old timestamp 2012-08-01 16:42:51 -04:00
Eelco Dolstra
afa7e01878 Inline unpack-channel.sh 2012-08-01 16:34:17 -04:00
Eelco Dolstra
8c79100839 Merge branch 'master' into no-manifests 2012-07-26 15:14:33 -04:00
Shea Levy
b1112bbef1 import: If the path is a valid .drv file, parse it and generate a derivation attrset.
The generated attrset has drvPath and outPath with the right string context, type 'derivation', outputName with
the right name, all with a list of outputs, and an attribute for each output.

I see three uses for this (though certainly there may be more):

* Using derivations generated by something besides nix-instantiate (e.g. guix)

* Allowing packages provided by channels to be used in nix expressions. If a channel installed a valid deriver
  for each package it provides into the store, then those could be imported and used as dependencies or installed
  in environment.systemPackages, for example.

* Enable hydra to be consistent in how it treats inputs that are outputs of another build. Right now, if an
  input is passed as an argument to the job, it is passed as a derivation, but if it is accessed via NIX_PATH
  (i.e. through the <> syntax), then it is a path that can be imported. This is problematic because the build
  being depended upon may have been built with non-obvious arguments passed to its jobset file. With this
  feature, hydra can just set the name of that input to the path to its drv file in NIX_PATH
2012-07-25 09:30:17 -04:00
Eelco Dolstra
04559a0d45 Merge branch 'master' of github.com:NixOS/nix into no-manifests 2012-07-11 18:53:27 -04:00
Eelco Dolstra
eae802459d Pass --insecure to curl so that https works 2012-07-09 15:49:20 -04:00
Eelco Dolstra
2dd3117c27 Inline fetchurl.sh 2012-07-09 15:48:55 -04:00
Shea Levy
035aa11403 Remove obsolete comment 2012-07-09 15:29:49 -04:00
Shea Levy
a2865f6b3d corepkgs/fetchurl: Build locally and outside of the chroot 2012-07-09 15:29:49 -04:00
Shea Levy
53f52c2111 corepkgs/fetchurl: the 'system' argument can be optional 2012-07-09 15:29:49 -04:00
Shea Levy
543bf742c9 corepkgs: distribute fetchurl files 2012-07-09 15:29:49 -04:00
Shea Levy
f863673a90 corepkgs/fetchurl: Call the shell directly instead of using the shebang 2012-07-09 15:29:49 -04:00
Shea Levy
a994eb92a4 corepkgs/fetchurl.sh: Use config.nix's curl 2012-07-09 15:29:49 -04:00
Shea Levy
9d94a28bed The fetchurl builder is now fetchurl.sh 2012-07-09 15:29:49 -04:00
Shea Levy
fd2630e1f7 Remove old fetchurl makefile 2012-07-09 15:29:49 -04:00
Shea Levy
6450f5699f Move fetchurl files out of their subdirectory 2012-07-09 15:29:49 -04:00
Shea Levy
40c01ec467 corepkgs/config.nix.in: We'll need curl 2012-07-09 15:29:49 -04:00
Shea Levy
c4df747267 Resurrect old corepkgs fetchurl 2012-07-09 15:29:49 -04:00
Eelco Dolstra
6b1e671ac6 Fix xz compression 2012-07-01 21:57:25 -04:00
Eelco Dolstra
f4190c38ba Allow both bzip2 and xz compression 2012-07-01 18:46:38 -04:00
Eelco Dolstra
4911a10a4e Use XZ compression in binary caches
XZ compresses significantly better than bzip2.  Here are the
compression ratios and execution times (using 4 cores in parallel) on
my /var/run/current-system (3.1 GiB):

  bzip2: total compressed size 849.56 MiB, 30.8% [2m08]
  xz -6: total compressed size 641.84 MiB, 23.4% [6m53]
  xz -7: total compressed size 621.82 MiB, 22.6% [7m19]
  xz -8: total compressed size 599.33 MiB, 21.8% [7m18]
  xz -9: total compressed size 588.18 MiB, 21.4% [7m40]

Note that compression takes much longer.  More importantly, however,
decompression is much faster:

  bzip2: 1m47.274s
  xz -6: 0m55.446s
  xz -7: 0m54.119s
  xz -8: 0m52.388s
  xz -9: 0m51.842s

The only downside to using -9 is that decompression takes a fair
amount (~65 MB) of memory.
2012-06-29 15:24:52 -04:00
Eelco Dolstra
663c06e8cd Disable building in chroot for Nix's corepkgs
The dependencies of the corepkgs are not necessarily in the chroot (or
in the Nix store), so don't build them in a chroot.
2012-05-09 22:14:36 -04:00
Eelco Dolstra
c722193a91 Don't use the build hook for unpacking channels 2012-04-26 16:52:08 +02:00
Eelco Dolstra
0b5107c016 If the (redirected) channel URL contains a version number, use it 2012-04-14 21:05:28 +02:00
Eelco Dolstra
ef902274fd Remove unnecessary "system" argument 2012-04-14 18:48:11 +02:00
Eelco Dolstra
e855c7e2c9 nix-channel improvements
"nix-channel --add" now accepts a second argument: the channel name.
This allows channels to have a nicer name than (say) nixpkgs_unstable.
If no name is given, it defaults to the last component of the URL
(with "-unstable" or "-stable" removed).

Also, channels are now stored in a profile
(/nix/var/nix/profiles/per-user/$USER/channels).  One advantage of
this is that it allows rollbacks (e.g. if "nix-channel --update" gives
an undesirable update).
2012-04-14 18:38:52 +02:00
Eelco Dolstra
a0477a458f * currentOutput -> outputName. "current" implies some temporal
aspect.
2012-01-04 12:00:39 +00:00
Eelco Dolstra
b79b85ad76 * Export the original input attributes of the derivation in
‘drvAttrs’.  This will simplify the implementation of functions such
  as ‘overrideDerivation’ in Nixpkgs, which need to filter out any
  added attributes such as outPath.
2012-01-04 11:56:15 +00:00
Eelco Dolstra
83647f4ef1 * Simplify the implementation of "derivation" a bit: lift out the
common attribution so that they're evaluated only once, etc.  Note
  that the default output is now the first element of the "outputs"
  attribute, rather than the first element of the sorted list of
  outputs.  This seems more user-friendly.
2012-01-04 11:04:19 +00:00
Eelco Dolstra
71f3c46cf6 * Drop the inefficient "Path" suffix in output attribute names. 2012-01-03 15:27:18 +00:00
Eelco Dolstra
921111d197 * Move the implementation of the ‘derivation’ primop into a separate
file.
2012-01-03 14:01:47 +00:00
Eelco Dolstra
9b7df1ef00 * Forgot to add. 2012-01-03 09:19:40 +00:00
Eelco Dolstra
39d45a6b09 * Add a test for nix-channel.
* Refactor the nix-channel unpacker a bit.
2012-01-03 01:51:38 +00:00
Eelco Dolstra
48cea0d01e * Refactoring: Get rid of a few subdirectories in corepkgs/, and some
other simplifications.
* Use <nix/...> to locate the corepkgs.  This allows them to be
  overriden through $NIX_PATH.
* Use bash's pipefail option in the NAR builder so that we don't need
  to create a temporary file.
2012-01-03 00:16:29 +00:00
Eelco Dolstra
fa69ff5726 * Fix the broken reference to bunzip2 in the channel unpack script. 2011-11-05 21:06:24 +00:00
Eelco Dolstra
6fcdbcac20 * Install NixManifest.pm, NixConfig.pm and GeneratePatches.pm under
the Nix:: namespace.
2011-10-10 21:11:08 +00:00
Eelco Dolstra
5693b8a7e2 * nix-push: no need to compute the NAR hash, since the Nix database
already has it (`nix-store -q --hash').
2010-11-17 12:51:54 +00:00
Eelco Dolstra
7f893b7a43 * Allow derivations to hint that they should not be built remotely
using the build hook mechanism, by setting the derivation attribute
  "preferLocalBuild" to true.  This has a few use cases:

  - The user environment builder.  Since it just creates a bunch of
    symlinks without much computation, there is no reason to do it
    remotely.  In fact, doing it remotely requires the entire closure
    of the user environment to be copied to the remote machine, which
    is extremely wasteful.

  - `fetchurl'.  Performing the download on a remote machine and then
    copying it to the local machine involves twice as much network
    traffic as performing the download locally, and doesn't save any
    CPU cycles on the local machine.
2010-08-04 12:13:58 +00:00
Eelco Dolstra
83dfa89870 * Sync with the trunk. 2010-05-07 14:46:47 +00:00
Ludovic Courtès
4750065ada buildenv: Special-case Python's site.py' and site.pyc'.
* corepkgs/buildenv/builder.pl.in (createLinks): Skip `site.py' and
  `site.pyc' files.
2010-05-05 20:46:41 +00:00
Ludovic Courtès
4bab25a28d buildenv: Special-case Python's `easy-install.pth' files.
* corepkgs/buildenv/builder.pl.in (createLinks): Skip `easy-install.pth'
  files.  Comment the hack.
2010-05-03 13:13:38 +00:00
Eelco Dolstra
fe2d869e04 * Store user environment manifests as a Nix expression in
$out/manifest.nix rather than as an ATerm.

  (Hm, I thought I committed this two days ago...)
2010-04-21 15:08:58 +00:00
Eelco Dolstra
3ce5f07793 * Ugly hack to make `nix-channel' work on Cygwin. 2010-02-02 17:01:16 +00:00
Eelco Dolstra
7f254706b0 * Allow the channel to declare a name for itself. 2009-03-03 14:47:39 +00:00
Eelco Dolstra
055608227f * nix-env: allow ~/.nix-defexpr to be a directory. If it is, then the
Nix expressions in that directory are combined into an attribute set
  {file1 = import file1; file2 = import file2; ...}, i.e. each Nix
  expression is an attribute with the file name as the attribute
  name.  Also recurses into directories.

* nix-env: removed the "--import" (-I) option which set the
  ~/.nix-defexpr symlink.

* nix-channel: don't use "nix-env --import", instead symlink
  ~/.nix-defexpr/channels.  So finally nix-channel --update doesn't
  override any default Nix expressions but combines with them.

  This means that you can have (say) a local Nixpkgs SVN tree and use
  it as a default for nix-env:

  $ ln -s .../path-to-nixpkgs-tree ~/.nix-defexpr/nixpkgs_svn

  and be subscribed to channels (including Nixpkgs) at the same time.
  (If there is any ambiguity, the -A flag can be used to
  disambiguate, e.g. "nix-env -i -A nixpkgs_svn.pan".)
2007-09-17 16:08:24 +00:00
Eelco Dolstra
bddc83a148 * New builtin function "isFunction". You're not supposed to use it
;-)
* Channels: fix channels that are plain lists of derivations (like
  strategoxt-unstable) instead  of functions (like nixpkgs-unstable).
  This fixes the error message "error: the left-hand side of the
  function call is neither a function nor a primop (built-in
  operation) but a list".
2007-05-16 16:17:04 +00:00
Eelco Dolstra
30beeb27a9 * Set the right priorities when recovering from a directory
collision.
2007-05-02 19:38:02 +00:00
Eelco Dolstra
93aefd9fc0 * Give unpacked channels more sensible names than 0, 1, ... They now
get the basename of the channel URL (e.g., nixpkgs-unstable).  The
  top-level Nix expression of the channel is now an attribute set, the
  attributes of which are the individual channels (e.g.,
  {nixpkgs_unstable = ...; strategoxt_unstable = ...}).  This makes
  attribute paths ("nix-env -qaA" and "nix-env -iA") more sensible,
  e.g., "nix-env -iA nixpkgs_unstable.subversion".
2007-05-01 23:16:38 +00:00
Eelco Dolstra
a46db5d013 * Package conflict resolution through priority levels. If there is a
user environment collission between two packages due to overlapping
  file names, then a package with a higher priority will overwrite the
  symlinks of a package with a lower priority.  E.g.,

    $ nix-env --set-flag priority 5 gcc
    $ nix-env --set-flag priority 10 binutils

  gives gcc a higher priority than binutils (higher number = lower
  priority).
2007-04-27 23:28:44 +00:00
Eelco Dolstra
3d05166086 * Allow conflicting packages to be kept in a user environment, and
allow switching between them (NIX-80).

  Example: two versions of Pan:

    $ nix-env -q pan
    pan-0.128
    pan-0.14.2.91

    $ readlink $(which pan)
    /nix/store/l38jrbilw269drpjkx7kinhrxj6fjh59-pan-0.14.2.91/bin/pan

  At most one of them can be active any given time.  Assuming than
  0.14.2.91 is active, you can active 0.128 as follows:

    $ nix-env --set-flag active false pan-0.14.2.91
    $ nix-env --set-flag active true pan-0.128

    $ readlink $(which pan)
    /nix/store/nziqwnlzy7xl385kglxhg75pfl5i936n-pan-0.128/bin/pan

  More flags to follow.
2007-04-27 22:40:59 +00:00
Eelco Dolstra
5ca45d085e * Use "propagated-user-env-packages", not "propagated-build-inputs"
for packages that should be propagated to the user environment.
2006-09-25 15:11:59 +00:00
Eelco Dolstra
02f2335712 * Propagated packages now have lower priority; they are symlinked
*after* the packages that have been explicitly installed, and
  collisions are ignored.
2006-09-25 15:07:45 +00:00
Eelco Dolstra
561a07f51d * Revert unintentional commit. 2006-08-22 13:18:51 +00:00
Eelco Dolstra
18e4ac0fc6 * `nix-instantiate --{eval|parse}-only --xml': print an XML
representation instead of an ATerm.
* Indent XML output.
2006-08-16 10:32:30 +00:00
Eelco Dolstra
5a6b45e252 * In nar.nix, path -> storePath, otherwise we get a collision between
environment variable names on Cygwin (where they are case
  insensitive).
2006-08-07 18:22:57 +00:00
Eelco Dolstra
b5988004d6 * Support for srcdir != builddir (NIX-41). 2006-05-12 11:47:45 +00:00
Eelco Dolstra
3fae65d4cc * Adhockery. 2005-07-22 20:37:39 +00:00
Eelco Dolstra
6842bc9ac4 * Be quiet when untarring a channel file. 2005-05-01 09:36:28 +00:00
Eelco Dolstra
7d876f8fa7 * Get rid of fetchurl, we don't need it anymore. 2005-04-07 14:35:44 +00:00
Eelco Dolstra
c815aff21b * `nix-store --add-fixed' to preload the outputs of fixed-output
derivations.  This is mostly to simplify the implementation of
  nix-prefetch-{url, svn}, which now work properly in setuid
  installations.

* Enforce valid store names in `nix-store --add / --add-fixed'.
2005-04-07 14:01:51 +00:00
Eelco Dolstra
bacd3a6cfa * Purify all corepkgs builders. 2005-03-15 12:03:15 +00:00
Eelco Dolstra
e52ae1c0ff * Use SHA-256 for nix-push. 2005-03-15 11:12:48 +00:00
Eelco Dolstra
8eff18cd43 * Set NAR name to content hash; previous nix-push names were not
unique.
* Drop `hashAlgo' attribute in manifests; prefix hashes with the hash
  algorithm instead.
2005-03-14 15:09:53 +00:00
Eelco Dolstra
543d7a41dc * Automatically add propagated build inputs to user environments.
Maybe this is a bad idea.
2005-03-07 13:27:56 +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
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
3d1b2101cc * Place manifests in /nix/var/nix/manifests.
* Use the new patch downloader.
2004-12-20 16:38:50 +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
d6db574ec1 * Check exit status of pipe elements. 2004-11-08 11:32:10 +00:00
Eelco Dolstra
37d7abd694 * New language feature: with expressions.
The expression `with E1; E2' evaluates to E2 with all bindings in
  the attribute set E1 substituted.  E.g.,

    with {x = 123;}; x

  evaluates to 123.  That is, the attribute set E1 is in scope in E2.

  This is particularly useful when importing files containing lots
  definitions.  E.g., instead of

    let {
      inherit (import ./foo.nix) a b c d e f;

      body = ... a ... f ...;
    }

  we can now say

    with import ./foo.nix;

    ... a ... f ...

  I.e., we don't have to say what variables should be brought into scope.
2004-10-25 16:54:56 +00:00
Niels Janssen
995d08208e * prevent collision on log directory 2004-09-19 15:53:37 +00:00
Eelco Dolstra
37ee6cef99 * Adapted nix-pull to use the new substitute mechanism. 2004-06-21 09:51:23 +00:00
Eelco Dolstra
b6df68c942 * Dist error. 2004-04-21 14:57:46 +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
2c5a8bf49f * Use @storedir@, not @prefix@/store. 2004-04-14 10:45:11 +00:00
Eelco Dolstra
2be8ac48bb * Make the creation of user environments much faster and more storage
efficient by creating only a single symlink to entire directory
  trees unless a collission occurs.
2004-04-06 11:42:28 +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
6d46e647ba * Fixed the old envpkgs filename. 2004-02-04 16:20:51 +00:00
Eelco Dolstra
94175e978a * RPM spec file.
* Respect DESTDIR variable.
2003-12-30 20:09:00 +00:00
Eelco Dolstra
d1d87badf6 * Bug fix. Hmm, I thought I'd fixed this before :-| 2003-11-24 16:38:46 +00:00
Eelco Dolstra
af7e6fe22e * Don't use a hard-coded path. 2003-11-22 21:12:36 +00:00
Eelco Dolstra
9486dda115 * Fix nix-push. 2003-11-22 20:39:51 +00:00
Eelco Dolstra
ab0bc4999a * Maintain integrity of the substitute and successor mappings when
deleting a path in the store.
* Allow absolute paths in Nix expressions.
* Get nix-prefetch-url to work again.
* Various other fixes.
2003-11-22 18:45:56 +00:00
Eelco Dolstra
9898746ef3 * nix-env: a tool to manage user environments.
* Replace all directory reading code by a generic readDirectory()
  function.
2003-11-19 17:27:16 +00:00
Eelco Dolstra
0791282b2f * Substitutes and nix-pull now work again.
* Fixed a segfault caused by the buffering of stderr.
* Fix now allows the specification of the full output path.  This
  should be used with great care, since it by-passes the normal hash
  generation.
* Incremented the version number to 0.4 (prerelease).
2003-10-16 16:29:57 +00:00
Eelco Dolstra
ab5e8767fa * Get nix-push to work again.
* Fixed svn:ignore on externals/.
2003-10-16 13:13:39 +00:00
Eelco Dolstra
563afb7fcc * Use passive FTP in wget. 2003-10-02 15:48:47 +00:00
Eelco Dolstra
e78f753aa8 * Include the right files in a distribution. 2003-10-02 12:22:19 +00:00
Eelco Dolstra
25304af72e * Set a path. 2003-08-28 10:51:52 +00:00
Eelco Dolstra
c4f1f49574 * nix-push generated invalid (old-style) slices.
* nar.sh needs a path.
2003-08-28 10:10:12 +00:00
Eelco Dolstra
e374dbf89b * A script `nix-prefetch-url' to fetch a URL, place it in the Nix
store, and print its hash.
2003-08-15 10:13:41 +00:00
Eelco Dolstra
9ad39df282 * `==' is not a valid operator. 2003-08-06 10:00:30 +00:00
Eelco Dolstra
d551062ec4 * Scan for wget and use the full path in fetchurl.sh.
* Use nix-hash (not md5sum) in fetchurl.sh.
2003-08-06 09:35:05 +00:00
Eelco Dolstra
aaee69cfde * INSTALL_DATA -> INSTALL_PROGRAM to ensure that the execute bit
remains set.
2003-07-30 10:14:58 +00:00
Eelco Dolstra
39ce70025b * Incorporated Berkeley DB and ATerm into the source tree.
* `make dist'.
2003-07-23 15:53:34 +00:00
Eelco Dolstra
e877c69d78 * Substitutes now should produce a path with the same id as they are
substituting for (obvious, really).

* For greater efficiency, nix-pull/unnar will place the output in a
  path that is probably the same as what is actually needed, thus
  preventing a path copy.

* Even if a output id is given in a Fix package expression, ensure
  that the resulting Nix derive expression has a different id.  This
  is because Nix expressions that are semantically equivalent (i.e.,
  build the same result) might be different w.r.t. efficiency or
  divergence.  It is absolutely vital for the substitute mechanism
  that such expressions are not used interchangeably.
2003-07-22 15:15:15 +00:00
Eelco Dolstra
c7bdb76fe4 * Syntax fixes.
* When pushing, put the hash in the file name so that the 
  client can verify (proof-carrying file names?).
2003-07-21 21:34:56 +00:00