mirror of
https://github.com/kevinnlsamuel/bak-old.git
synced 2025-12-06 10:05:58 +05:30
136 lines
2.6 KiB
Bash
Executable File
136 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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###################################
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# install script for bak-old.sh #
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# authored by github.com/kevinnls #
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# - another Linux user tired of #
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# type cp file file.bak #
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###################################
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set -e
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VERSION='v0.1.0-beta'
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work_dir=/tmp/bak-old_installation/
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download_url="https://github.com/kevinnls/bak-old/releases/download/${VERSION}/bak-old.sh"
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# list of known downloaders and options for download
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declare -A dlers
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dlers[curl]="curl -fsSLO"
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dlers[wget]="wget -q"
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# list of possible destinations for root user
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r_dstdirs=('/usr/local/bin'
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'/usr/bin'
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'/bin')
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# list of possible destinations for normal user
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u_dstdirs=("$HOME/.local/bin"
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"$HOME/bin")
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declare downloader
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declare dest_dir
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debug(){ ### function to call when $DEBUG is set
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set -xv
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}
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is_command(){ ### function to check if a command exists
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{ command -v $1;} >/dev/null && return 0 || return 1
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}
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# text formatting escape sequences
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txt_bold='\e[1m'
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txt_red='\e[31m'
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txt_green='\e[32m'
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txt_yellow='\e[33m'
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txt_0='\e[0m'
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err_no_downloader(){
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cat <<- EOM
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$(tput setaf 1; tput bold)ERR: missing dependencies$(tput sgr0)
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required by this installation script:
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- wget OR curl
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install either application using your package manager and try again
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alternatively, you can manually download the file from
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$download_url
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to a directory in your PATH
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EOM
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exit 1
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}
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err_no_dest_in_path(){
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cat <<-EOM
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$(tput setaf 1; tput bold)ERR: no preconfigured destinations are in \
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your PATH$(tput sgr0)
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check your PATH variable configuration
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#or specify the destination with -d
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EOM
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exit 1
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}
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err_no_home_dir(){
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cat <<- EOM
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$(tput setaf 1; tput bold)ERR: user $(whoami) does not have a valid home \
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directory
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EOM
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exit 1
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}
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find_dler(){
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for dler in ${!dlers[@]}; do
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is_command $dler && downloader="${dlers[$dler]}"
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[[ -n "$downloader" ]] && return
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done
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[[ -z "$downloader" ]] && err_no_downloader
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}
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find_dest_dir(){
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local user_id=$(id -u)
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local dirlist
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if [[ user_id -eq 0 ]]; then
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dirlist=(${r_dstdirs[@]})
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elif [[ -d "$HOME" ]]; then
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dirlist=(${u_dstdirs[@]})
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else
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err_no_home_dir
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fi
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for dir in ${dirlist[@]}; do
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if [[ "$PATH" =~ /*:${dir}* ]] || [[ "$PATH" =~ /*${dir}:* ]]; then
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dest_dir="$dir"
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fi
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[[ -n "$dest_dir" ]] && return
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done
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[[ -z "$dest_dir" ]] && err_no_dest_in_path
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}
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setup() {
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# setup
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# create temp dir for installation work
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mkdir -p "$work_dir"
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cd "$work_dir"
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}
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cleanup(){
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# cleanup
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cd "$HOME"
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rm -rf "$work_dir"
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}
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install(){
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setup
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find_dler
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echo $downloader
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find_dest_dir
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echo $dest_dir
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cleanup
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}
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### enable debugging if ###
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${DEBUG+debug} ###
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### $DEBUG is set ###
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install |