shell/helpers/basic.sh
2024-11-24 23:47:04 +08:00

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#!/bin/bash
source $(dirname $0)/io.sh || exit 255
########################################################
# Little handy helpers for scripting
########################################################
# convert relative path $1 to full one
abspath() {
echo $(realpath -q "${1/#\~/$HOME}")
}
# check if path $1 is writable
is_writable() {
[ -w "$(abspath $1)" ]
}
# check if path $1 is a directory
is_dir() {
[ -d "$(abspath $1)" ]
}
# check if path $1 is a file
is_file() {
[ -f "$(abspath $1)" ]
}
# check if an argument is a shell function
is_function() {
declare -F "$1" > /dev/null
}
# check if string $1 matches regex $2
regex_match() {
printf "%s" "$1" | grep -qP "$2"
}
# check if array $2 contains string $1
in_array() {
local find=$1
shift
for e in "$@"; do
[[ "$e" == "$find" ]] && return 0
done
return 1
}
# join all elements of array $2 with delimiter $1
implode() {
local d=${1-}
local f=${2-}
if shift 2; then
printf %s "$f" "${@/#/$d}"
fi
}
# open url $1 in system web-browser
open_url() {
if which xdg-open > /dev/null; then
xdg-open "$1" </dev/null >/dev/null 2>&1 & disown
elif which gnome-open > /dev/null; then
gnome-open "$1" </dev/null >/dev/null 2>&1 & disown
fi
}
# unpack .tar.gz file $1 into path $2
unpack_targz() {
require tar
tar -xzf "$1" -C "$2"
}
# make soft symbolic link of path $1 to path $2
symlink() {
ln -sf "$1" "$2"
}
# download file $1 into path $2 using wget
download() {
require wget
wget "$1" -O "$2"
}