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powerlevel10k/functions/utilities.zsh

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# vim:ft=zsh ts=2 sw=2 sts=2 et fenc=utf-8
################################################################
# Utility functions
# This file holds some utility-functions for
# the powerlevel9k-ZSH-theme
# https://github.com/bhilburn/powerlevel9k
################################################################
# Exits with 0 if a variable has been previously defined (even if empty)
# Takes the name of a variable that should be checked.
function defined() {
[[ ! -z "${(tP)1}" ]]
}
# Given the name of a variable and a default value, sets the variable
# value to the default only if it has not been defined.
#
# Typeset cannot set the value for an array, so this will only work
# for scalar values.
function set_default() {
local varname="$1"
local default_value="$2"
defined "$varname" || typeset -g "$varname"="$default_value"
}
# Converts large memory values into a human-readable unit (e.g., bytes --> GB)
# Takes two arguments:
# * $size - The number which should be prettified
# * $base - The base of the number (default Bytes)
printSizeHumanReadable() {
typeset -F 2 size
size="$1"+0.00001
local extension
extension=('B' 'K' 'M' 'G' 'T' 'P' 'E' 'Z' 'Y')
local index=1
# if the base is not Bytes
if [[ -n $2 ]]; then
local idx
for idx in "${extension[@]}"; do
if [[ "$2" == "$idx" ]]; then
break
fi
index=$(( index + 1 ))
done
fi
while (( (size / 1024) > 0.1 )); do
size=$(( size / 1024 ))
index=$(( index + 1 ))
done
echo "$size${extension[$index]}"
}
# Gets the first value out of a list of items that is not empty.
# The items are examined by a callback-function.
# Takes two arguments:
# * $list - A list of items
# * $callback - A callback function to examine if the item is
# worthy. The callback function has access to
# the inner variable $item.
function getRelevantItem() {
local -a list
local callback
# Explicitly split the elements by whitespace.
list=(${=1})
callback=$2
for item in $list; do
# The first non-empty item wins
try=$(eval "$callback")
if [[ -n "$try" ]]; then
echo "$try"
break;
fi
done
}
# OS detection
case $(uname) in
Darwin)
OS='OSX'
OS_ICON=$(print_icon 'APPLE_ICON')
;;
CYGWIN_NT-* | MSYS_NT-*)
OS='Windows'
OS_ICON=$(print_icon 'WINDOWS_ICON')
;;
FreeBSD)
OS='BSD'
OS_ICON=$(print_icon 'FREEBSD_ICON')
;;
OpenBSD)
OS='BSD'
OS_ICON=$(print_icon 'FREEBSD_ICON')
;;
DragonFly)
OS='BSD'
OS_ICON=$(print_icon 'FREEBSD_ICON')
;;
Linux)
OS='Linux'
os_release_id="$(grep -E '^ID=([a-zA-Z]*)' /etc/os-release | cut -d '=' -f 2)"
case "$os_release_id" in
*arch*)
OS_ICON=$(print_icon 'LINUX_ARCH_ICON')
;;
*debian*)
OS_ICON=$(print_icon 'LINUX_DEBIAN_ICON')
;;
*ubuntu*)
OS_ICON=$(print_icon 'LINUX_UBUNTU_ICON')
;;
*elementary*)
OS_ICON=$(print_icon 'LINUX_ELEMENTARY_ICON')
;;
*fedora*)
OS_ICON=$(print_icon 'LINUX_FEDORA_ICON')
;;
*coreos*)
OS_ICON=$(print_icon 'LINUX_COREOS_ICON')
;;
*gentoo*)
OS_ICON=$(print_icon 'LINUX_GENTOO_ICON')
;;
*mageia*)
OS_ICON=$(print_icon 'LINUX_MAGEIA_ICON')
;;
*centos*)
OS_ICON=$(print_icon 'LINUX_CENTOS_ICON')
;;
*opensuse*|*tumbleweed*)
OS_ICON=$(print_icon 'LINUX_OPENSUSE_ICON')
;;
*sabayon*)
OS_ICON=$(print_icon 'LINUX_SABAYON_ICON')
;;
*slackware*)
OS_ICON=$(print_icon 'LINUX_SLACKWARE_ICON')
;;
*linuxmint*)
OS_ICON=$(print_icon 'LINUX_MINT_ICON')
;;
*alpine*)
OS_ICON=$(print_icon 'LINUX_ALPINE_ICON')
;;
*aosc*)
OS_ICON=$(print_icon 'LINUX_AOSC_ICON')
;;
*nixos*)
OS_ICON=$(print_icon 'LINUX_NIXOS_ICON')
;;
*devuan*)
OS_ICON=$(print_icon 'LINUX_DEVUAN_ICON')
;;
*manjaro*)
OS_ICON=$(print_icon 'LINUX_MANJARO_ICON')
;;
*)
OS='Linux'
OS_ICON=$(print_icon 'LINUX_ICON')
;;
esac
8 years ago
# Check if we're running on Android
case $(uname -o 2>/dev/null) in
Android)
OS='Android'
OS_ICON=$(print_icon 'ANDROID_ICON')
;;
esac
;;
SunOS)
OS='Solaris'
OS_ICON=$(print_icon 'SUNOS_ICON')
;;
*)
OS=''
OS_ICON=''
;;
esac
# Determine the correct sed parameter.
#
# `sed` is unfortunately not consistent across OSes when it comes to flags.
SED_EXTENDED_REGEX_PARAMETER="-r"
if [[ "$OS" == 'OSX' ]]; then
local IS_BSD_SED="$(sed --version &>> /dev/null || echo "BSD sed")"
if [[ -n "$IS_BSD_SED" ]]; then
SED_EXTENDED_REGEX_PARAMETER="-E"
fi
fi
# Determine if the passed segment is used in the prompt
#
# Pass the name of the segment to this function to test for its presence in
# either the LEFT or RIGHT prompt arrays.
# * $1: The segment to be tested.
segment_in_use() {
local key=$1
if [[ -n "${POWERLEVEL9K_LEFT_PROMPT_ELEMENTS[(r)$key]}" ]] || [[ -n "${POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS[(r)$key]}" ]]; then
return 0
else
return 1
fi
}
# Print a deprecation warning if an old segment is in use.
# Takes the name of an associative array that contains the
# deprecated segments as keys, the values contain the new
# segment names.
print_deprecation_warning() {
typeset -AH raw_deprecated_segments
raw_deprecated_segments=(${(kvP@)1})
for key in ${(@k)raw_deprecated_segments}; do
if segment_in_use $key; then
# segment is deprecated
print -P "%F{yellow}Warning!%f The '$key' segment is deprecated. Use '%F{blue}${raw_deprecated_segments[$key]}%f' instead. For more informations, have a look at the CHANGELOG.md."
fi
done
}
# A helper function to determine if a segment should be
# joined or promoted to a full one.
# Takes three arguments:
# * $1: The array index of the current segment
# * $2: The array index of the last printed segment
# * $3: The array of segments of the left or right prompt
function segmentShouldBeJoined() {
local current_index=$1
local last_segment_index=$2
# Explicitly split the elements by whitespace.
local -a elements
elements=(${=3})
local current_segment=${elements[$current_index]}
local joined=false
if [[ ${current_segment[-7,-1]} == '_joined' ]]; then
joined=true
# promote segment to a full one, if the predecessing full segment
# was conditional. So this can only be the case for segments that
# are not our direct predecessor.
if (( $(($current_index - $last_segment_index)) > 1)); then
# Now we have to examine every previous segment, until we reach
# the last printed one (found by its index). This is relevant if
# all previous segments are joined. Then we want to join our
# segment as well.
local examined_index=$((current_index - 1))
while (( $examined_index > $last_segment_index )); do
local previous_segment=${elements[$examined_index]}
# If one of the examined segments is not joined, then we know
# that the current segment should not be joined, as the target
# segment is the wrong one.
if [[ ${previous_segment[-7,-1]} != '_joined' ]]; then
joined=false
break
fi
examined_index=$((examined_index - 1))
done
fi
fi
# Return 1 means error; return 0 means no error. So we have
# to invert $joined
if [[ "$joined" == "true" ]]; then
return 0
else
return 1
fi
}
################################################################
# Given a directory path, truncate it according to the settings.
# Parameters:
# * $1 Path: string - the directory path to be truncated
# * $2 Length: integer - length to truncate to
# * $3 Delimiter: string - the delimiter to use
# * $4 From: string - "right" | "middle". If omited, assumes right.
function truncatePath() {
# if the current path is not 1 character long (e.g. "/" or "~")
if (( ${#1} > 1 )); then
# convert $2 from string to integer
2=$(( $2 ))
# set $3 to "" if not defined
[[ -z $3 ]] && 3="" || 3=$(echo -n $3)
# set $4 to "right" if not defined
[[ -z $4 ]] && 4="right"
# create a variable for the truncated path.
local trunc_path
# if the path is in the home folder, add "~/" to the start otherwise "/"
[[ $1 == "~"* ]] && trunc_path='~/' || trunc_path='/'
# split the path into an array using "/" as the delimiter
local paths=$1
paths=(${(s:/:)${paths//"~\/"/}})
# declare locals for the directory being tested and its length
local test_dir test_dir_length
# do the needed truncation
case $4 in
right)
# include the delimiter length in the threshhold
local threshhold=$(( $2 + ${#3} ))
# loop through the paths
for (( i=1; i<${#paths}; i++ )); do
# get the current directory value
test_dir=$paths[$i]
test_dir_length=${#test_dir}
# only truncate if the resulting truncation will be shorter than
# the truncation + delimiter length and at least 3 characters
if (( $test_dir_length > $threshhold )) && (( $test_dir_length > 3 )); then
# use the first $2 characters and the delimiter
trunc_path+="${test_dir:0:$2}$3/"
else
# use the full path
trunc_path+="${test_dir}/"
fi
done
;;
middle)
# we need double the length for start and end truncation + delimiter length
local threshhold=$(( $2 * 2 ))
# create a variable for the start of the end truncation
local last_pos
# loop through the paths
for (( i=1; i<${#paths}; i++ )); do
# get the current directory value
test_dir=$paths[$i]
test_dir_length=${#test_dir}
# only truncate if the resulting truncation will be shorter than
# the truncation + delimiter length
if (( $test_dir_length > $threshhold )); then
# use the first $2 characters, the delimiter and the last $2 characters
last_pos=$(( $test_dir_length - $2 ))
trunc_path+="${test_dir:0:$2}$3${test_dir:$last_pos:$test_dir_length}/"
else
# use the full path
trunc_path+="${test_dir}/"
fi
done
;;
esac
# return the truncated path + the current directory
echo $trunc_path${1:t}
else # current path is 1 character long (e.g. "/" or "~")
echo $1
fi
}
# Given a directory path, truncate it according to the settings for
# `truncate_from_right`
function truncatePathFromRight() {
local delim_len=${#POWERLEVEL9K_SHORTEN_DELIMITER:-1}
echo $1 | sed $SED_EXTENDED_REGEX_PARAMETER \
"s@(([^/]{$((POWERLEVEL9K_SHORTEN_DIR_LENGTH))})([^/]{$delim_len}))[^/]+/@\2$POWERLEVEL9K_SHORTEN_DELIMITER/@g"
}
# Search recursively in parent folders for given file.
function upsearch () {
if [[ "$PWD" == "$HOME" || "$PWD" == "/" ]]; then
echo "$PWD"
elif test -e "$1"; then
pushd .. > /dev/null
upsearch "$1"
popd > /dev/null
echo "$PWD"
else
pushd .. > /dev/null
upsearch "$1"
popd > /dev/null
fi
}