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diff --git a/doc/guix-cookbook.texi b/doc/guix-cookbook.texi index f541592d13..8a9d075a3d 100644 --- a/doc/guix-cookbook.texi +++ b/doc/guix-cookbook.texi @@ -64,6 +64,7 @@ Translation Project}. * Packaging:: Packaging tutorials * System Configuration:: Customizing the GNU System * Advanced package management:: Power to the users! +* Environment management:: Control environment * Acknowledgments:: Thanks! * GNU Free Documentation License:: The license of this document. @@ -2269,6 +2270,130 @@ It's safe to delete the Guix channel profile you've just installed with the channel specification, the project profile does not depend on it. @c ********************************************************************* +@node Environment management +@chapter Environment management + +Guix provides multiple tools to manage environment. This chapter +demonstrate such utilities. + +@menu +* Guix environment via direnv:: Setup Guix environment with direnv +@end menu + +@node Guix environment via direnv +@section Guix environment via direnv + +Guix provides a @samp{direnv} package, which could extend shell after +directory change. This tool could be used to prepare a pure Guix +environment. + +The following example provides a shell function for @file{~/.direnvrc} +file, which could be used from Guix Git repository in +@file{~/src/guix/.envrc} file to setup a build environment similar to +described in @pxref{Building from Git,,, guix, GNU Guix Reference +Manual}. + +Create a @file{~/.direnvrc} with a Bash code: + +@example +# Thanks <https://github.com/direnv/direnv/issues/73#issuecomment-152284914> +export_function() +@{ + local name=$1 + local alias_dir=$PWD/.direnv/aliases + mkdir -p "$alias_dir" + PATH_add "$alias_dir" + local target="$alias_dir/$name" + if declare -f "$name" >/dev/null; then + echo "#!$SHELL" > "$target" + declare -f "$name" >> "$target" 2>/dev/null + # Notice that we add shell variables to the function trigger. + echo "$name \$*" >> "$target" + chmod +x "$target" + fi +@} + +use_guix() +@{ + # Set GitHub token. + export GUIX_GITHUB_TOKEN="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" + + # Unset 'GUIX_PACKAGE_PATH'. + export GUIX_PACKAGE_PATH="" + + # Recreate a garbage collector root. + gcroots="$HOME/.config/guix/gcroots" + mkdir -p "$gcroots" + gcroot="$gcroots/guix" + if [ -L "$gcroot" ] + then + rm -v "$gcroot" + fi + + # Miscellaneous packages. + PACKAGES_MAINTENANCE=( + direnv + git + git:send-email + git-cal + gnupg + guile-colorized + guile-readline + less + ncurses + openssh + xdot + ) + + # Environment packages. + PACKAGES=(help2man guile-sqlite3 guile-gcrypt) + + # Thanks <https://lists.gnu.org/archive/html/guix-devel/2016-09/msg00859.html> + eval "$(guix environment --search-paths --root="$gcroot" --pure guix --ad-hoc $@{PACKAGES[@@]@} $@{PACKAGES_MAINTENANCE[@@]@} "$@@")" + + # Predefine configure flags. + configure() + @{ + ./configure --localstatedir=/var --prefix= + @} + export_function configure + + # Run make and optionally build something. + build() + @{ + make -j 2 + if [ $# -gt 0 ] + then + ./pre-inst-env guix build "$@@" + fi + @} + export_function build + + # Predefine push Git command. + push() + @{ + git push --set-upstream origin + @} + export_function push + + clear # Clean up the screen. + git-cal --author='Your Name' # Show contributions calendar. + + # Show commands help. + echo " +build build a package or just a project if no argument provided +configure run ./configure with predefined parameters +push push to upstream Git repository +" +@} +@end example + +Every project containing @file{.envrc} with a string @code{use guix} +will have predefined environment variables and procedures. + +Run @command{direnv allow} to setup the environment for the first time. + +@c ********************************************************************* @node Acknowledgments @chapter Acknowledgments |