11/11: doc: Explain when guix edit is read-only.

[Alex Kost]

alezost pushed a commit to branch master
in repository guix.

commit 424a323e92d92284efcd30cf548d1f41c556d592
Author: myglc2 <address@hidden>
Date:   Thu Jul 21 18:35:34 2016 -0400

    doc: Explain when guix edit is read-only.
    
    * doc/guix.texi (Invoking guix edit): Explain when you can and can't
      edit the recipe.
    
    Signed-off-by: Alex Kost <address@hidden>
---
 doc/guix.texi |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 9703c72..ec22d94 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4536,8 +4536,9 @@ You can freely access a huge library of build logs!
 
 @cindex package definition, editing
 So many packages, so many source files!  The @command{guix edit} command
-facilitates the life of packagers by pointing their editor at the source
-file containing the definition of the specified packages.  For instance:
+facilitates the life of users and packagers by pointing their editor at
+the source file containing the definition of the specified packages.
+For instance:
 
 @example
 guix edit gcc@@4.9 vim
@@ -4545,9 +4546,15 @@ guix edit gcc@@4.9 vim
 
 @noindent
 launches the program specified in the @code{VISUAL} or in the
address@hidden environment variable to edit the recipe of address@hidden
address@hidden environment variable to view the recipe of address@hidden
 and that of Vim.
 
+If you are using a Guix Git checkout (@pxref{Building from Git}), or
+have created your own packages on @code{GUIX_PACKAGE_PATH}
+(@pxref{Defining Packages}), you will be able to edit the package
+recipes. Otherwise, you will be able to examine the read-only recipes
+for packages currently in the store.
+
 If you are using Emacs, note that the Emacs user interface provides the
 @kbd{M-x guix-edit} command and a similar functionality in the ``package
 info'' and ``package list'' buffers created by the @kbd{M-x