doc: Suggest running guix-daemon with 'sudo -E'.

Suggested by Martin H. <maze@strahlungsfrei.de>.

* doc/contributing.texi (Running Guix Before It Is Installed): Suggest
'sudo -E'.
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Ludovic Courtès 2017-08-05 23:08:44 +02:00
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@ -110,10 +110,13 @@ actually installing them. So that you can distinguish between your
To that end, all the command-line tools can be used even if you have not
run @code{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:
top build tree of Guix), as in@footnote{The @option{-E} flag to
@command{sudo} guarantees that @code{GUILE_LOAD_PATH} is correctly set
such that @command{guix-daemon} and the tools it uses can find the Guile
modules they need.}:
@example
$ sudo ./pre-inst-env guix-daemon --build-users-group=guixbuild
$ sudo -E ./pre-inst-env guix-daemon --build-users-group=guixbuild
$ ./pre-inst-env guix build hello
@end example