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03/13: doc: Add a REPL example.

From: Ludovic Courtès
Subject: 03/13: doc: Add a REPL example.
Date: Mon, 26 Oct 2015 23:02:25 +0000

civodul pushed a commit to branch master
in repository guix.

commit 96856613249ccef0bfce16edd945a841d1b661f7
Author: Ludovic Courtès <address@hidden>
Date:   Mon Oct 26 18:44:18 2015 +0100

    doc: Add a REPL example.
    * doc/contributing.texi (Running Guix Before It Is Installed): Add REPL
    * doc/emacs.texi (Emacs General info): Add @cindex.
 doc/contributing.texi |   24 ++++++++++++++++++++++++
 doc/emacs.texi        |    2 ++
 2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/doc/contributing.texi b/doc/contributing.texi
index 245ce9b..d80c0d5 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -86,6 +86,30 @@ Similarly, for a Guile session using the Guix modules:
 $ ./pre-inst-env guile -c '(use-modules (guix utils)) (pk (%current-system))'
+;;; ("x86_64-linux")
address@hidden example
address@hidden REPL
address@hidden read-eval-print loop
address@hidden and for a REPL (@pxref{Using Guile Interactively,,, guile, Guile
+Reference Manual}):
+$ ./pre-inst-env guile
+scheme@@(guile-user)> ,use(guix)
+scheme@@(guile-user)> ,use(gnu)
+scheme@@(guile-user)> (define snakes
+                       (fold-packages
+                         (lambda (package lst)
+                           (if (string-prefix? "python"
+                                               (package-name package))
+                               (cons package lst)
+                               lst))
+                         '()))
+scheme@@(guile-user)> (length snakes)
+$1 = 361
 @end example
 The @command{pre-inst-env} script sets up all the environment variables
diff --git a/doc/emacs.texi b/doc/emacs.texi
index 0e901e1..b36e859 100644
--- a/doc/emacs.texi
+++ b/doc/emacs.texi
@@ -227,6 +227,8 @@ prefix argument is used.  This has the same meaning as 
 option (@pxref{Invoking guix package}).
 @item C-c C-z
address@hidden REPL
address@hidden read-eval-print loop
 Go to the Guix REPL (@pxref{The REPL,,, geiser, Geiser User Manual}).
 @item h

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