system: Factorize bashrc default configuration.

This factorizes out the remaining bashrc bits from /etc/skel/.bashrc to a the
template used for both /etc/bashrc on Guix System and ~/.bashrc for
home-bash-service-type.

Rationale: The use of /etc/skel introduce state: the file is only copied
originally when the user account is created, and never (automatically)
refreshed again.

* gnu/system.scm (operating-system-etc-service):
<profile>: Guard against souring /etc/bashrc in non-interactive, SSH case.
<bashrc>: Use %default-bashrc, having migrated the remaining definitions to...
* gnu/system/shadow.scm (%default-bashrc): ... here.  Factorize aliases to...
* gnu/services.scm (%default-bash-aliases): ... here.
(%default-bashrc-d-aliases): New variable.
(%default-etc-bashrc-d-files): Include it in the default configuration.
* gnu/services/base.scm (%base-services): Register etc-bashrc-d-service-type.
* gnu/home/services/shells.scm (add-bash-configuration): Do not set PS1, now
part of %default-bashrc.
(home-bash-configuration) [guix-defaults?]: Update doc.
[aliases]: Set %default-bash-aliases as the default value.  Update doc.
* doc/guix.texi (Shells Home Services): Update documentation.
(Service Reference): Update example.

Change-Id: I340c614983a78fd20a9c4a9705e7fc542ae9b513

1 files changed, 10 insertions, 7 deletions

diff --git a/gnu/tests/base.scm b/gnu/tests/base.scm
index 0f31c152e0f..db904d7f102 100644
--- a/gnu/tests/base.scm
+++ b/gnu/tests/base.scm
@@ -187,6 +187,8 @@ test \"$PROFILE_D_OK\" = yes")
                                             "\
 . /etc/bashrc
 set -e -x
+test -f /etc/bashrc.d/bash_completion.sh
+test -f /etc/bashrc.d/aliases.sh
 test -f /etc/bashrc.d/test_bashrc_d.sh
 test \"$BASHRC_D_OK\" = yes"))
                     marionette)))
@@ -606,14 +608,15 @@ functionality tests, using the given KERNEL.")
                                            (plain-file
                                             "invalid-name"
                                             "not a POSIX script -- ignore me")))
-                                    (service
+                                    (simple-service
+                                     'extra-bashrc-d-files
                                      etc-bashrc-d-service-type
-                                     (list (plain-file
-                                            "test_bashrc_d.sh"
-                                            "export BASHRC_D_OK=yes\n")
-                                           (plain-file
-                                            "invalid-name"
-                                            "not a Bash script -- ignore me")))
+                                     (list  (plain-file
+                                             "test_bashrc_d.sh"
+                                             "export BASHRC_D_OK=yes\n")
+                                            (plain-file
+                                             "invalid-name"
+                                             "not a Bash script -- ignore me")))
                                     %base-services)))
                  #:imported-modules '((gnu services herd)
                                       (guix combinators))))