Interactive non-login shells should not source /etc/profile, otherwise
environment variables set by the user will get clobbered. For
example:
$ export PERL5LIB=/foo
$ bash
$ echo $PERL5LIB
/home/eelco/.nix-profile/lib/perl5/site_perl:/nix/var/nix/profiles/default/lib/perl5/site_perl:/run/current-system/sw/lib/perl5/site_perl:/home/eelco/.nix-profile/lib/perl5/site_perl:/nix/var/nix/profiles/default/lib/perl5/site_perl:/run/current-system/sw/lib/perl5/site_perl
This change does two things:
* "NixOSizes" environment variables generation. This allows some more
error-checking and opens possibilities for a modular environment
configuration. From now on the most of environment variables are
generated directly by the nix code. Generating sh code that
generates environment variables is left in a few places where
nontrivial access to a local environment state is needed.
* By doing the first change this patch untangles bash from the
environment configuration and makes it trivial to add a support for
other non bash-compatible shells.
Now to the sad part. This change is quite large (and I'm not sure it's
possible to split it) and yet is not quite complete, it needs some
changes to nixpkgs to be perfect.
See !!! comments in modules/config/shells-environment.nix.
Main principle behind this change is "change environment generation
and nothing else". In particular, shell configuration principles stay
exactly the same as before.
Aspell can only handle one dict-dir directive and currently we hardocde
that to
ASPELL_CONF="dict-dir $HOME/.nix-profile/lib/aspell"
This means that aspell doesn't work if it is installed to the system or
default nix profile -- it only works in the user profile.
With this change, aspell can be installed to any of the nix profiles. If
it is installed in more than one profile, the most "local" profile wins
(i.e. sysadmin can set up a default, users can override it).
I.e., modules that use "require = [options]". Nowadays that should be
written as
{
options = { ... };
config = { ... };
};
Also, use "imports" instead of "require" in places where we actually
import another module.
If the user tries to run a program that doesn't exist from Bash, the
program name is looked up in a database that maps to Nix package
names. If it is found, we print out a message like:
$ pdflatex
The program ‘pdflatex’ is currently not installed. It is provided by
several packages. You can install it by typing one of the following:
nix-env -i tetex
nix-env -i texlive-core
If the environment variable $NIX_AUTO_INSTALL is set, the command is
installed and executed automatically:
$ hello --version
The program ‘hello’ is currently not installed. It is provided by
the package ‘hello’, which I will now install for you.
installing `hello-2.8'
hello (GNU hello) 2.8
Copyright (C) 2011 Free Software Foundation, Inc. ...
To use this, you must currently manually put the SQLite programs
database in /var/lib/nixos/programs.sqlite. In the future, this file
should be provided as part of the NixOS channel so it gets updated
automatically. To get a test version:
$ curl http://nixos.org/~eelco/programs.sqlite.xz | xz -d > /var/lib/nixos/programs.sqlite
The new configuration.nix option 'environment.enableBashCompletion'
determines whether bash completion is automatically enabled system-wide
for all interactive shells or not. The default setting is 'off'.
The new configuration.nix option 'environment.enableBashCompletion'
determines whether bash completion is automatically enabled system-wide
for all interactive shells or not. The default setting is 'off'.
Note that for attribute-based nix-env installations, the NixOS
channel contains Nixpkgs as its "pkgs" attribute, so
$ nix-env -iA nixos.pkgs.foo
will work instead of the old
$ nix-env -iA nixpkgs_sys.foo
* Fix the path to root's channels installed in ~/.nix-defexpr.
svn path=/nixos/trunk/; revision=33823
* Add a slash to the end of $MODULE_DIR, as expected by depmod. (Not
that running depmod from the command line is all that useful, since
you can't use it to update the tree in the Nix store. But at least
commands like "depmod -n" work now.) Reported by Kirill Elagin on
IRC.
svn path=/nixos/trunk/; revision=33312
warning
-bash: warning: setlocale: LC_TIME: cannot change locale (en_GB.UTF8): No such file or directory
when $LC_TIME is set in environment.shellInit.
svn path=/nixos/trunk/; revision=33248
wasn't sourced in a parent shell (as determined by the environment
variable __ETC_PROFILE_DONE). This prevents overriden values of
environment variables such as $PATH from being clobbered in
subshells.
* Move all aliases to /etc/bashrc (since those are for interactive
use).
svn path=/nixos/trunk/; revision=33246
window in which /bin/sh is missing. This can cause concurrently
running programs to fail (e.g. Hydra jobs =>
http://hydra.nixos.org/build/2267831). You'd think the odds of this
are very low, but they're not.
svn path=/nixos/trunk/; revision=32901
Users who want a user-specific bin directory to override system paths should
configure that in their user-specific ~/.bashrc, not in the system-wide init
file. The global file shouldn't add directories from user homes to $PATH
without knowing whether those actually exist or whether the users even want
them in $PATH. On my system, for example, there is no ~/bin, so I don't want my
$PATH to look for one. Removing an erroneous entry from $PATH is cumbersome,
but adding one is easy, so it feels better to err on the side of caution.
svn path=/nixos/trunk/; revision=31188
