GNU bug report logs - #51543
[PATCH 0/2] Some improvements to the Bash home service

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From: Xinglu Chen <public <at> yoctocell.xyz>
To: 51543 <at> debbugs.gnu.org
Cc: Liliana Marie Prikler <liliana.prikler <at> gmail.com>
Subject: [bug#51543] [PATCH 2/2] doc: Improve documentation of the Bash home service
Date: Fri, 05 Nov 2021 15:03:18 +0100

* doc/guix.texi (Shells Home Services): Document ‘home-bash-extension’
  configuration record.
* gnu/home/services/shells.scm (generate-home-bash-documentation): Extract
  docstrings from ‘home-bash-extension’.
  (home-bash-configuration): Expound on docstrings.

Fixes: <https://issues.guix.gnu.org/50991>
---
 doc/guix.texi                | 44 ++++++++++++++++++++++++++++++++----
 gnu/home/services/shells.scm | 29 ++++++++++++++++--------
 2 files changed, 59 insertions(+), 14 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index f7312a5b30..002193e994 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -36159,6 +36159,7 @@
 
 @subsubheading Bash Home Service
 
+@anchor{home-bash-configuration}
 @deftp {Data Type} home-bash-configuration
 Available @code{home-bash-configuration} fields are:
 
@@ -36167,15 +36168,20 @@
 The Bash package to use.
 
 @item @code{guix-defaults?} (default: @code{#t}) (type: boolean)
-Add sane defaults like reading @file{/etc/bashrc}, coloring output for
-@code{ls} provided by guix to @file{.bashrc}.
+Add sane defaults like reading @file{/etc/bashrc} and coloring the output of
+@command{ls} to the end of the @file{.bashrc} file.
 
 @item @code{environment-variables} (default: @code{()}) (type: alist)
-Association list of environment variables to set for the Bash session.
+Association list of environment variables to set for the Bash session.  The
+rules for the @code{home-environment-variables-service-type} apply
+here (@pxref{Essential Home Services}).  The contents of this field will be
+added after the contents of the @code{bash-profile} field.
 
 @item @code{aliases} (default: @code{()}) (type: alist)
-Association list of aliases to set for the Bash session.  The alias will
-automatically be quoted, so something line this:
+Association list of aliases to set for the Bash session.  The aliases
+will be defined after the contents of the @code{bashrc} field has been
+put in the @file{.bashrc} file.  The alias will automatically be quoted,
+so something line this:
 
 @lisp
 '((\"ls\" . \"ls -alF\"))
@@ -36206,7 +36212,35 @@
 process for example).
 
 @end table
+@end deftp
+
+You can extend the Bash service by using the @code{home-bash-extension}
+configuration record, whose fields most mirror that of
+@code{home-bash-configuration} (@pxref{home-bash-configuration}).  The
+contents of the extensions will be added to the end of the corresponding
+Bash configuration files (@pxref{Bash Startup Files,,, bash, The GNU
+Bash Reference Manual}.
+
+@deftp {Data Type} home-bash-extension
+Available @code{home-bash-extension} fields are:
+
+@table @asis
+@item @code{environment-variables} (default: @code{()}) (type: alist)
+Association list of environment variables to set.
+
+@item @code{aliases} (default: @code{()}) (type: alist)
+Association list of aliases to set.
 
+@item @code{bash-profile} (default: @code{()}) (type: text-config)
+List of file-like objects.
+
+@item @code{bashrc} (default: @code{()}) (type: text-config)
+List of file-like objects.
+
+@item @code{bash-logout} (default: @code{()}) (type: text-config)
+List of file-like objects.
+
+@end table
 @end deftp
 
 @subsubheading Zsh Home Service
diff --git a/gnu/home/services/shells.scm b/gnu/home/services/shells.scm
index f24e47f762..9b8427da7b 100644
--- a/gnu/home/services/shells.scm
+++ b/gnu/home/services/shells.scm
@@ -323,16 +323,21 @@ (define-configuration home-bash-configuration
    "The Bash package to use.")
   (guix-defaults?
    (boolean #t)
-   "Add sane defaults like reading @file{/etc/bashrc}, coloring output
-for @code{ls} provided by guix to @file{.bashrc}.")
+   "Add sane defaults like reading @file{/etc/bashrc} and coloring the output of
+@command{ls} to the end of the @file{.bashrc} file.")
   (environment-variables
    (alist '())
-   "Association list of environment variables to set for the Bash session."
+   "Association list of environment variables to set for the Bash session.  The
+rules for the @code{home-environment-variables-service-type} apply
+here (@pxref{Essential Home Services}).  The contents of this field will be
+added after the contents of the @code{bash-profile} field."
    serialize-posix-env-vars)
   (aliases
    (alist '())
-   "Association list of aliases to set for the Bash session.  The alias will
-automatically be quoted, so something line this:
+   "Association list of aliases to set for the Bash session.  The aliases will be
+defined after the contents of the @code{bashrc} field has been put in the
+@file{.bashrc} file.  The alias will automatically be quoted, so something line
+this:
 
 @lisp
 '((\"ls\" . \"ls -alF\"))
@@ -646,10 +651,16 @@ (define (generate-home-shell-profile-documentation)
    'home-shell-profile-configuration))
 
 (define (generate-home-bash-documentation)
-  (generate-documentation
-   `((home-bash-configuration
-      ,home-bash-configuration-fields))
-   'home-bash-configuration))
+  (string-append
+   (generate-documentation
+    `((home-bash-configuration
+       ,home-bash-configuration-fields))
+    'home-bash-configuration)
+   "\n\n"
+   (generate-documentation
+    `((home-bash-extension
+       ,home-bash-extension-fields))
+    'home-bash-extension)))
 
 (define (generate-home-zsh-documentation)
   (generate-documentation
-- 
2.33.0

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