wip

helpers/basic.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+source $( dirname $(readlink -e -- "${BASH_SOURCE}"))/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"
+}
+
+# download file $1 into path $2 using curl
+cdownload() {
+    require curl
+    curl -fsSL "$1" -o "$2"
+}