From 4b96998292442ec03024481c911d88f86c7c36b5 Mon Sep 17 00:00:00 2001
From: Xinglu Chen <public@yoctocell.xyz>
Date: Sun, 7 Nov 2021 12:36:19 +0100
Subject: home: services: bash: Add ‘aliases’ field.
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* doc/guix.texi (Shells Home Services): Document it.
* gnu/home/services/shells.scm (bash-serialize-aliases): New procedure.
(home-bash-configuration, home-bash-extension): Add ‘aliases’ field.
(home-bash-extensions): Adjust accordingly.
* guix/scripts/home/import.scm (generate-bash-configuration+modules): Populate
the ‘alias’ field.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 guix/scripts/home/import.scm | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'guix/scripts/home')

diff --git a/guix/scripts/home/import.scm b/guix/scripts/home/import.scm
index 7a7712dd96..fbf89069a7 100644
--- a/guix/scripts/home/import.scm
+++ b/guix/scripts/home/import.scm
@@ -27,6 +27,9 @@
   #:use-module (gnu packages)
   #:use-module (ice-9 match)
   #:use-module (ice-9 pretty-print)
+  #:use-module (ice-9 rdelim)
+  #:use-module (ice-9 regex)
+  #:use-module (ice-9 popen)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-26)
   #:export (import-manifest
@@ -56,11 +59,32 @@ FILE-NAME with \"-\", and return the basename of it."
   (define (destination-append path)
     (string-append destination-directory "/" path))
 
+  (define (bash-alias->pair line)
+    (if (string-prefix? "alias" line)
+        (let ((matched (string-match "alias (.+)=\"?'?([^\"']+)\"?'?" line)))
+          `(,(match:substring matched 1) . ,(match:substring matched 2)))
+        '()))
+  
+  (define (parse-aliases input)
+    (let loop ((line (read-line input))
+               (result '()))
+      (if (eof-object? line)
+          (reverse result)
+          (loop (read-line input)
+                (cons (bash-alias->pair line) result)))))
+
   (let ((rc (destination-append ".bashrc"))
         (profile (destination-append ".bash_profile"))
         (logout (destination-append ".bash_logout")))
     `((service home-bash-service-type
                (home-bash-configuration
+                ,@(if (file-exists? rc)
+                      `((aliases
+                         ',(let* ((port (open-pipe* OPEN_READ "bash" "-i" "-c" "alias"))
+                               (alist (parse-aliases port)))
+                           (close-port port)
+                           (filter (negate null?) alist))))
+                      '())
                 ,@(if (file-exists? rc)
                       `((bashrc
                          (list (local-file ,rc
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