This change makes GUIX_EXTENSIONS_PATH handled specially so package extensions
do not need to propagate Guix or extend their native search path to locate the
extension.

* gnu/home/services.scm (environment-variables->setup-environment-script):
Setup GUIX_EXTENSIONS_PATH to locate extensions in profiles that do not
contain Guix.
* gnu/system.scm (operating-system-etc-service): Likewise.
* gnu/packages/containers.scm (guix-compose): Remove unneeded
'native-search-paths' specification.
* gnu/packages/package-management.scm (toys): Likewise.
(guix-xsearch): Likewise.
* guix/search-paths.scm ($GUIX_EXTENSIONS_PATH): Adjust comment.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

The home-gc-root-service-type has gnu/services.scm as location but,
being in gnu/home/services.scm, it should have
gnu/home/services.scm. The tests/home-services.scm test has been broken
since f7b8fbb504094ad617c7102579559efcc56db5fb .
This commit fixes that, by instantiating a new
service-type record instead of directly using the one built by
system->home-service.

This was initially reported by Yelninei at
https://codeberg.org/guix/guix/issues/6946#issuecomment-11318779 .

* gnu/home/services/scm (home-gc-root-service-type): Instantiate a new
service-type record, instead of directly using the one built by
system->home-service.

Fixes: https://codeberg.org/guix/guix/issues/6960
Change-Id: I4389e6bbd2b2e4b0657768228651e8b1c01fee3a

* gnu/home/services.scm (home-gc-root-service-type): New variable.

Merges: https://codeberg.org/guix/guix/pulls/4236
Change-Id: I648068fc005a993b9527ed13ae87470c5ce9b693

* gnu/home/services.scm (shell-variable-definitions): New procedure.
* gnu/home/services/shells.scm (serialize-shell-variables): New procedure.
(home-bash-configuration)[variables]: New field.
(add-bash-configuration): Honor it.
(home-bash-extension)[variables]: New field.
(home-bash-extensions): Handle ‘variables’.
* doc/guix.texi (Shells Home Services): Update.  Change ‘PS1’ example to use
‘variables’, not ‘environment-variables’.
* doc/he-config-bare-bones.scm: Use ‘variables’ instead of ‘bash-profile’.

Change-Id: I29083d6313d10b1eb9d91eccacfb33efefe60d58

* gnu/home/services.scm (files->files-directory): Build file union
without checking for existence of included items.

* tests/guix-home.sh: Verify symlinking files out of store works.

Change-Id: I94054003f4a6be944252ce7a397cf56f0b979554
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

* gnu/home/services.scm: Re-export ‘simple-service‘.

Change-Id: Id680af7050fa23d112e4172d96c15470c3dbeaf9
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Locales installed via Guix Home should be exposed to Guix packages by
default.

* gnu/home/services.scm (environment-variables->setup-environment-script):
Set GUIX_LOCPATH.

Change-Id: Ic61f0832312479ba36f471d92a12e7b4e296389f
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

While they aren’t exported, these temporary variables show up in the
resulting shell, cluttering tab completion and declare -p.

* gnu/home/services.scm (environment-variables->setup-environment-script):
Unset shell variables.
* gnu/home/services/shells.scm (add-shell-profile-file): Likewise.

Change-Id: Ibb634849d9f38c1a9a44c0d493e92231364de958
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

setup-environment already defines this variable. Use it since it’s more
concise.

* gnu/home/services.scm (environment-variables->setup-environment-script):
Use GUIX_PROFILE.

Change-Id: Ib75d8df6294976f4e95cfa7d607dc0ba21ddd258
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Change-Id: I316652aff7418af4b8e83bea24638b1513f8aa97