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Guix provides a ‘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 ~/.direnvrc file, which could be used from Guix Git repository in ~/src/guix/.envrc file to setup a build environment similar to described in veja Building from Git em GNU Guix Reference Manual.
Create a ~/.direnvrc with a Bash code:
# 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 shell --search-paths --root="$gcroot" --pure \ --development guix ${PACKAGES[@]} ${PACKAGES_MAINTENANCE[@]} "$@")" # Predefine configure flags. configure() { ./configure } 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 " }
Every project containing .envrc with a string use guix
will
have predefined environment variables and procedures.
Run direnv allow
to setup the environment for the first time.
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