arch/pkg/de-p1st-installer/lib/util.sh

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function join_by() {
# Join array elements with character $1
#
# arg $1: delimiter
# arg $2: name of source array
# arg $3: variable name to store result
local -n ptr=$2 || return $?
local -n ptr2=$3 || return $?
ptr2=$(printf ",%s" "${ptr[@]}")
ptr2=${ptr2:1}
}
function newline_to_space() {
# Replaces all newlines with spaces
#
# arg $1: name of variable
local -n ptr=$1 || return $?
# Replace newlines with spaces
# See bash string substitution: https://gist.github.com/JPvRiel/b279524d3e56229a896477cb8082a72b
# echo "replacing newlines in str: -->$ptr<--"
ptr="${ptr//$'\n'/' '}"
# echo "new str is: -->$ptr<--"
}
function newline_separated_to_array() {
# Watch out for tailing newlines as these will get an empty array entry at the end.
# $1 and $2 can be equal (if the result shall be written to the input variable)
#
# arg $1: name of variable with newline separated list
# arg $2: name of array to store values into
local -n ptr=$1 || return $?
local -n ptr2=$2 || return $?
# ptr newline separated list.
# Store this as array ptr2.
readarray -t ptr2 <<<"$ptr"
}
function space_separated_to_array() {
# arg $1: name of variable with space separated list
# arg $2: name of array to store values into
local -n ptr=$1 || return $?
local -n ptr2=$2 || return $?
# ptr space separated list.
# Store this as array ptr2.
# Without newline at last array element: https://unix.stackexchange.com/a/519917/315162
readarray -d " " -t ptr2 < <(printf '%s' "$ptr")
}
function get_cpu_vendor() {
# @post
# CPU_VENDOR ("amd", "intel", "none")
if [ -z "${CPU_VENDOR}" ]; then
# if CPU_VENDOR has no value yet, ask user for input!
local vendor_id
vendor_id=$(cat /proc/cpuinfo | grep vendor_id | head -1 | sed 's|vendor_id\s*:\s*||')
if [ "$vendor_id" = "AuthenticAMD" ]; then
CPU_VENDOR="amd"
elif [ "$vendor_id" = "GenuineIntel" ]; then
CPU_VENDOR="intel"
else
echo "Unknown CPU vendor: $vendor_id"
return 1
fi
fi
}