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# Helper functions to ensure portability and/or provide choices
_seq() (
# Pure shell counter meant to be used in 'for' loops.
i=0 buf=''
while [ "$(( i += 1 ))" -le "$1" ]; do
buf="$buf $i "
done
printf '%s' "$buf"
)
_stat() (
_user=; eval set -- "$(ls -ld "$1")"
id -u "${_user:=$3}" >/dev/null 2>&1 || _user=root
printf '%s' "$_user"
)
sh256() {
# This is a sha256sum function for outputting a standard
# hash digest. sha256 on BSD systems require an '-r' flag
# for outputting the same way with sha256sum, and still,
# it outputs a single space between the hash and the file
# whereas sha256sum outputs double spaces. It fallbacks to
# openssl, but that is rarely ever needed.
{ sha256sum "$1" 2>/dev/null ||
sha256 -r "$1" 2>/dev/null ||
openssl dgst -r -sha256 "$1" ||
die "No sha256 program could be run." ;} |
while read -r hash _; do printf '%s %s\n' "$hash" "$1"; done
}
decompress() {
case $1 in
*.tar) cat ;;
*.bz2) bzip2 -cd ;;
*.xz|*.txz) xz -dcT 0 ;;
*.tgz|*.gz) gzip -cd ;;
*.zst) zstd -cd ;;
esac < "$1"
}
as_root() {
# Simple function to run a command as root using either 'sudo',
# 'doas' or 'su'. Hurrah for choice.
[ "$uid" = 0 ] || log "Using '${su:-su}' (to become ${user:=root})"
# We are exporting package manager variables, so that we still have the
# same repository paths / access to the same cache directories etc.
set -- HOME="$HOME" \
USER="$user" \
XDG_CACHE_HOME="$XDG_CACHE_HOME" \
CPT_CACHE="$CPT_CACHE" \
CPT_CHOICE="$CPT_CHOICE" \
CPT_COMPRESS="$CPT_COMPRESS" \
CPT_DEBUG="$CPT_DEBUG" \
CPT_FETCH="$CPT_FETCH" \
CPT_FORCE="$CPT_FORCE" \
CPT_HOOK="$CPT_HOOK" \
CPT_KEEPLOG="$CPT_KEEPLOG" \
CPT_PATH="$CPT_PATH" \
CPT_PID="$CPT_PID" \
CPT_PROMPT="$CPT_PROMPT" \
CPT_ROOT="$CPT_ROOT" \
CPT_TMPDIR="$CPT_TMPDIR" \
"$@"
case ${su##*/} in
sls|sudo|doas) "$su" -u "$user" -- env "$@" ;;
su) su -c "env $* <&3" "$user" 3<&0 </dev/tty ;;
*) die "Invalid CPT_SU value: $su" ;;
esac
}
# Local Variables:
# mode: sh
# End:
|
