scripts/src/eprefix-activate

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#!/usr/bin/env bash
# This file is part of scripts.
# scripts is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
# scripts is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with scripts. If not, see <https://www.gnu.org/licenses/>.
# Original author: Maciej Barć <xgqt@riseup.net>
# Copyright (c) 2020, src_prepare group
# Licensed under the GNU GPL v3 License
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# Source this to enter the Eprefix environment
# Like this for example:
# $ source $HOME/gentoo/eprefix-activate
# >>> Set eprefix
EPREFIX=${EPREFIX:-${HOME}/gentoo}
export EPREFIX
# >>> Funcion definitions
command_exists() {
if command -v "${1}" >/dev/null
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then
return 0
fi
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return 1
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}
if command_exists tput
then
eprefix_good="$(tput bold)$(tput setaf 2)*$(tput sgr0)"
eprefix_bad="$(tput bold)$(tput setaf 1)*$(tput sgr0)"
eprefix_warn="$(tput bold)$(tput setaf 3)*$(tput sgr0)"
else
eprefix_good="*"
eprefix_bad="*"
eprefix_warn="*"
fi
eprefix_addpath() {
if [ -d "${1}" ]
then
PATH=${1}:${PATH}
export PATH
else
printf "%s\n" "${eprefix_warn} ${1} not found" >> /dev/stderr
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fi
}
eprefix_addman() {
if [ -d "${1}" ]
then
MANPATH=${1}:${MANPATH}
export MANPATH
else
printf "%s\n" "${eprefix_warn} ${1} not found" >> /dev/stderr
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fi
}
eprefix_packages() {
if [ -d "${EPREFIX}/var/db/pkg" ]
then
find "${EPREFIX}"/var/db/pkg/*/* -type d | wc -l
fi
}
eprefix_world() {
if [ -f "${EPREFIX}/var/lib/portage/world" ]
then
wc -l < "${EPREFIX}/var/lib/portage/world"
fi
}
# >>> Checks
# Exit if script is not sourced
case ${-} in
*i* )
:
;;
* )
printf "%s\n" \
"${eprefix_bad} Error: not a login shell" \
"${eprefix_bad} Run: source ${0}" \
">>> Exiting the shell" >> /dev/stderr
exit 1
;;
esac
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# Exit if eprefix does not exist
if [ ! -d "${EPREFIX}" ]
then
printf "%s\n" \
"${eprefix_bad} No ${EPREFIX} found!" \
">>> Exiting the shell" >> /dev/stderr
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sleep 3
exit 1
fi
# >>> PATH setup
# Add directories to PATH
eprefix_addpath "${EPREFIX}/bin"
eprefix_addpath "${EPREFIX}/opt/bin"
eprefix_addpath "${EPREFIX}/sbin"
eprefix_addpath "${EPREFIX}/tmp/bin"
eprefix_addpath "${EPREFIX}/tmp/usr/bin"
eprefix_addpath "${EPREFIX}/usr/bin"
eprefix_addpath "${EPREFIX}/usr/local/bin"
eprefix_addpath "${EPREFIX}/usr/local/sbin"
eprefix_addpath "${EPREFIX}/usr/sbin"
# Add manpages
eprefix_addman "${EPREFIX}/usr/local/share/man"
eprefix_addman "${EPREFIX}/usr/share/binutils-data/x86_64-pc-linux-gnu/2.34/man"
eprefix_addman "${EPREFIX}/usr/share/man"
# >>> General env setup
# Process .sh files
for sh in "${EPREFIX}"/etc/profile.d/*.sh
do
# shellcheck disable=SC1090 disable=SC1091
[ -r "${sh}" ] && source "${sh}"
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done
unset sh
# Set Portage shell
CONFIG_SHELL="${EPREFIX}/bin/bash"
export CONFIG_SHELL
# Misc env vars
CONFIG_PROTECT_MASK="${CONFIG_PROTECT_MASK} ${EPREFIX}/etc/ca-certificates.conf"
CONFIG_PROTECT_MASK="${CONFIG_PROTECT_MASK} ${EPREFIX}/etc/gentoo-release"
CONFIG_PROTECT_MASK="${CONFIG_PROTECT_MASK} ${EPREFIX}/etc/sandbox.d"
CONFIG_PROTECT_MASK="${CONFIG_PROTECT_MASK} ${EPREFIX}/etc/terminfo"
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GCC_SPECS=""
LANG="en_US.utf8"
export CONFIG_PROTECT_MASK
export GCC_SPECS
export LANG
# Set umask
umask 022
# >>> Use Eprefix's tools
# We just use "which" because we put Eprefix's PATHs first
# before the system ones
EDITOR="$(command -v nano)"
PAGER="$(command -v less)"
export EDITOR
export PAGER
# >>> Emerge options
# Sandbox does not work well on Prefix
# Bug: 490246
FEATURES="${FEATURES} -usersandbox -sandbox"
export FEATURES
# Check if we are on a prefix profile
printf "\n"
if command_exists eselect
then
eprofile="$(eselect profile show)"
if [[ "${eprofile}" == *prefix* ]]
then
printf "%s\n" "${eprefix_good} ${eprofile}"
else
printf "%s\n" "${eprefix_bad} You are not on a prefix profile" >> /dev/stderr
fi
unset eprofile
else
printf "%s\n" "${eprefix_bad} Could not determine running profile" >> /dev/stderr
fi
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# >>> Finish
printf "\n%s\n" \
">>> Sourced the eprefix script\n" \
"${eprefix_good} Prefix: ${EPREFIX}" \
"${eprefix_good} Packages: $(eprefix_packages)" \
"${eprefix_good} In World: $(eprefix_world)" \
"${eprefix_good} Have fun! ;-)"
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if command_exists emerge
then
printf "\n%s\n" ">>> Environment ready"
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else
printf "\n%s\n" \
"${eprefix_bad} Could not locate emerge" \
"${eprefix_bad} Environment may be broken" \
">>> Continuing anyway..." >> /dev/stderr
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fi
# >>> Cleanup
unset eprefix_good
unset eprefix_bad
unset eprefix_warn