nix/home/program/bash/module/Util.nix

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{ ... }:
{
text = ''
# Get the number of avaialble cores (threads).
function _core_count() {
cat /proc/cpuinfo | grep ^processor | wc -l
}
# Get the number of available memory (in mebibytes).
function _mem_free() {
free -m | sed -n -e '2p' | awk '{print $7}'
}
# Function-wrapper to iterate with specified function with provided files.
# By default Iterates on all non-hidden files and directories.
# List of variables available to FUNCTION: target - current file, count - current item index, total - sum of targets, failed - count of previously failed items, skipped - count of skipped files, status - status line (not recommended to use).
# Usage: _iterate_targets <FUNCTION> [FILES]
function _iterate_targets() {
local IFS=$'\n'
local foo="''${1}"
local targets=("''${@:2}")
local total=''${#targets[@]}
local count=0
local failed=0
local skipped=0
local code=0
# set dafult value to target all supported archives.
if [[ "''${targets}" = "" ]]; then
_error "No targets provided."
return 1
fi
# iterate each target.
for target in "''${targets[@]}"; do
# increment counter.
((count++))
# status info.
local status="[''${count}/''${total}] ''${target}"
_info "''${status}"
# Call function.
''${foo} "''${target}"
# Show error.
if [[ ''${?} != 0 ]]; then
((failed++))
_error "''${status}: Failed."
fi
# Add newline if not the last one.
[[ "''${count}" = "''${total}" ]] || _info
done
# Show skipped.
if [[ ''${skipped} != 0 ]]; then
_warn
_warn "''${color_byellow}Skipped: ''${skipped}.''${color_default}"
fi
# Show error.
if [[ ''${failed} != 0 ]]; then
[[ "''${skipped}" = 0 ]] && _error
_error "''${color_bred}Failed: ''${failed}.''${color_default}"
false
fi
}
# Skip current iteration.
# Usage: _iterate_skip [MESSAGE]
function _iterate_skip() {
((skipped++))
[[ "''${*}" != "" ]] && _warn "''${color_byellow}''${*}''${color_default}"
}
# Report an error.
# Always returns code 1.
# Usage: _error <MESSAGE>
function _error() {
>&2 echo -e "''${color_bred}''${*}''${color_default}"
return 1
}
# Report a warning.
# Usage: _warn <MESSAGE>
function _warn() {
>&2 echo -e "''${color_byellow}''${*}''${color_default}"
}
# Report a debug.
# Usage: _debug <MESSAGE>
function _debug() {
>&2 echo -e "''${color_bwhite}''${*}''${color_default}"
}
# Report an info.
# Usage: _info <MESSAGE>
function _info() {
>&2 echo -e "''${color_bwhite}''${*}''${color_default}"
}
# Check if array contains an element (strict).
# Usage: _contains <ELEMENT> <ARRAY>
function _contains() {
local IFS=$'\n'
local target="''${1}"
local array="''${@:2}"
if [[ "''${target}" = "" ]] || [[ "''${array}" = "" ]]; then
help _contains
return 2
fi
for item in ''${array[@]}; do
[[ "''${item}" = "''${target}" ]] && return 0
done
return 1
}
# Find an index of an element in array.
# Usage: _index_of <ELEMENT> <ARRAY>
function _index_of() {
local element="''${1}"
local array="''${@:2}"
local index=0
for item in ''${array[@]}; do
[[ "''${item}" = "''${element}" ]] && break
((index++))
done
echo "''${index}"
}
# Check if inside Tmux.
function _is_tmux() {
[[ "''${TERM_PROGRAM}" = "tmux" ]]
}
# Check if root.
function _is_root() {
[[ "''${UID}" = 0 ]]
}
# Ring a bell.
function _bell() {
echo -e '\a'
}
# Get users.
function _get_users() {
local users=("voronind" "dasha")
echo ''${users[@]}
}
# Force the command to be called twice within the specified period in seconds. Used primarily in important keyboard shortcuts like poweroff.
# Usage: _twice <PERIOD> <COMMAND>
function _twice() {
local IFS=$'\n'
local file="/tmp/.twice"
local period=''${1}
local command="''${@:2}"
if [[ "$(cat ''${file} 2> /dev/null)" = "''${command}" ]]; then
''${command}
return 0
fi
echo "''${command}" > "''${file}"
sleep ''${period}
rm "''${file}" 2> /dev/null
}
'';
2024-04-06 03:03:58 +03:00
}