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doc: Add "The Perfect Setup" in 'HACKING'.

* HACKING (The Perfect Setup): New section.
wip-grafts
Ludovic Courtès 9 years ago
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  1. 17
      HACKING

17
HACKING

@ -23,6 +23,23 @@ Similarly, for a Guile session using the Guix modules:
The ‘pre-inst-env’ script sets up all the environment variables
necessary to support this.
* The Perfect Setup
The Perfect Setup to hack on Guix is basically the perfect setup used
for Guile hacking (info "(guile) Using Guile in Emacs"). First, you
need more than an editor, you need [[http://www.gnu.org/software/emacs][Emacs]], empowered by the wonderful
[[http://nongnu.org/geiser/][Geiser]].
Geiser allows for interactive and incremental development from within
Emacs: code compilation and evaluation from within buffers, access to
on-line documentation (docstrings), context-sensitive completion, M-. to
jump to an object definition, a REPL to try out your code, and more.
To actually edit the code, Emacs already has a neat Scheme mode. But in
addition to that, you must not miss [[http://www.emacswiki.org/emacs/ParEdit][Paredit]]. It provides facilities to
directly operate on the syntax tree, such as raising an s-expression or
wrapping it, swallowing or rejecting the following s-expression, etc.
* Adding new packages
Package recipes in Guix look like this:

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