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#!/bin/sh -e
#
# This is a simple package manager written in POSIX 'sh' for
# KISS Linux utlizing the core unix utilites where needed.
#
# The script runs with 'set -e' enabled. It will exit on any
# non-zero return code. This ensures that no function continues
# if it fails at any point.
#
# Keep in mind that this involves extra code in the case where
# an error is optional or required.
#
# The code below conforms to shellcheck's rules. However, some
# lint errors *are* disabled as they relate to unexpected
# behavior (which we do expect).
#
# KISS is available under the MIT license.
#
# - Dylan Araps.
die() {
# Print a message and exit with '1' (error).
printf '\033[31m!>\033[m %s\n' "$@" >&2
exit 1
}
log() {
# Print a message with a colorful arrow to distinguish
# from other output.
printf '\033[32m=>\033[m %s\n' "$@"
}
pkg_search() {
# Figure out which repository a package belongs to by
# searching for directories matching the package name
# in $KISS_PATH/*.
[ "$KISS_PATH" ] || \
die "\$KISS_PATH needs to be set." \
"Example: KISS_PATH=/packages/core:/packages/extra:/packages/xorg" \
"Repositories will be searched in the configured order." \
"The variable should work just like \$PATH."
# Disable globbing with 'set -f' to ensure that the unquoted
# variable doesn't expand into anything nasty.
# shellcheck disable=2086,2046
{
set -f
set -- "$1" $(IFS=:; find $KISS_PATH -maxdepth 1 -name "$1")
set +f
}
# A package may also not be found due to a repository not being
# readable by the current user. Either way, we need to die here.
[ -z "$2" ] && die "Package '$1' not in any repository."
printf '%s\n' "$2"
}
args() {
# Parse script arguments manually. POSIX 'sh' has no 'getopts'
# or equivalent built in.
[ "$1" ] || {
log "$kiss [b|c|i|l|r|u] [pkg]" \
"build: Build a package." \
"checksum: Generate checksums." \
"install: Install a package (Runs build if needed)." \
"list: List packages." \
"remove: Remove a package." \
"update: Check for updates."
exit
}
action=$1
shift
while [ "$1" ]; do
case $action in
b*)
pkg_search "$1"
shift
;;
esac
done
}
main() {
kiss=${0##*/}
args "$@"
}
main "$@"
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