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doc: Add "Running Guix Before It Is Installed".

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* doc/guix.texi (Running Guix Before It Is Installed): New node.
  (Packaging Guidelines): Refer to it.
This commit is contained in:
Ludovic Courtès 2015-05-23 15:55:08 +02:00
parent 92492b2383
commit c71979f416
2 changed files with 44 additions and 13 deletions
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14
HACKING
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@ -2,7 +2,7 @@
#+TITLE: Hacking GNU Guix and Its Incredible Distro
Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
Copyright © 2014 Pierre-Antoine Rault <par@rigelk.eu>
@ -46,17 +46,7 @@ take a look at “info '(guix) Installation'” or send a message to
* Running Guix before it is installed
Command-line tools can be used even if you have not run "make install".
To do that, prefix each command with ‘./pre-inst-env’, as in:
./pre-inst-env guix build --help
Similarly, for a Guile session using the Guix modules:
./pre-inst-env guile -c '(use-modules (guix utils)) (pk (%current-system))'
The ‘pre-inst-env’ script sets up all the environment variables
necessary to support this.
See the same-named section in the manual.
* The Perfect Setup

43
doc/guix.texi
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@ -88,6 +88,7 @@ Installation
* Running the Test Suite:: Testing Guix.
* Setting Up the Daemon:: Preparing the build daemon's environment.
* Invoking guix-daemon:: Running the build daemon.
* Running Guix Before It Is Installed:: Hacker tricks.
Setting Up the Daemon
@ -252,6 +253,7 @@ instead, you want to install the complete GNU operating system,
* Running the Test Suite:: Testing Guix.
* Setting Up the Daemon:: Preparing the build daemon's environment.
* Invoking guix-daemon:: Running the build daemon.
* Running Guix Before It Is Installed:: Hacker tricks.
@end menu
@node Binary Installation
@ -830,6 +832,44 @@ useful in exceptional circumstances, such as if you need to run several
daemons on the same machine.
@end table
@node Running Guix Before It Is Installed
@section Running Guix Before It Is Installed
If you are hacking Guix itself---which is a good idea!---you will find
it useful to test the changes made in your local source tree checkout
without actually installing them.
To that end, all the command-line tools can be used even if you have not
run @command{make install}. To do that, prefix each command with
@command{./pre-inst-env} (the @file{pre-inst-env} script lives in the
top build tree of Guix), as in:
@example
$ sudo ./pre-inst-env guix-daemon --build-users-group=guixbuild
$ ./pre-inst-env guix build hello
@end example
@noindent
Similarly, for a Guile session using the Guix modules:
@example
$ ./pre-inst-env guile -c '(use-modules (guix utils)) (pk (%current-system))'
@end example
The @command{pre-inst-env} script sets up all the environment variables
necessary to support this, including @code{PATH} and
@code{GUILE_LOAD_PATH}.
If you are hacking Guix from Emacs using the wonderful Geiser
(@pxref{Introduction,,, geiser, Geiser User Manual}), make sure to
augment Guile's load path so that it finds source files from your
checkout:
@lisp
;; Assuming the Guix checkout is in ~/src/guix.
(add-to-list 'geiser-guile-load-path "~/src/guix")
@end lisp
@c *********************************************************************
@node Package Management
@ -6215,7 +6255,8 @@ creating packages. For more information on package definitions,
Once a package definition is in place, stored in a file in the Guix
source tree, it can be tested using the @command{guix build} command
(@pxref{Invoking guix build}). For example, assuming the new package is
called @code{gnew}, you may run this command from the Guix build tree:
called @code{gnew}, you may run this command from the Guix build tree
(@pxref{Running Guix Before It Is Installed}):
@example
./pre-inst-env guix build gnew --keep-failed