dotfiles/bin/qemush

124 lines
2.3 KiB
Bash
Executable file

#!/bin/bash
exec_as() {
local user
user="$1"
shift
if [ "$(whoami)" != "$user" ]; then
exec sudo -u "$user" "$0" "$@"
else
cd || exit
fi
}
exec_as qemu "$@"
bin=bin
images=images
if [ -t 1 ]; then
cat=src-hilite-lesspipe.sh
else
cat='cat'
fi
PATH="./${bin}:${PATH}"
EDITOR="${EDITOR:-nvim}"
alias ls='ls --color=auto'
alias exec='exec '
shopt -s expand_aliases
umask 027
perror() {
>&2 printf '\033[1;31mERROR:\033[0m \033[1m%s\033[0m\n' "$*"
}
public_help() {
local name
name="$(basename "$0")"
exec cat << EOF
${name}: usage:
${name} active - (default behaviour) list active VMs
${name} start <VM name> - start a VM
${name} watch <VM name> - attach VM screen session
${name} ls - list available VMs
${name} edit <VM name> - edit VM launching script
${name} rm <VM name> - delete launch script
${name} diskls - list available disk images
${name} diskadd <disk name> <size> - create a disk image
${name} diskrm <disk name> - delete disk image
${name} shell - start a shell as user qemu
${name} help - show this help
EOF
}
error_usage() {
perror "Invalid usage"
>&2 public_help
return 1
}
public_start() {
local vm_name="$1"
shift
exec screen -S "$vm_name" "$vm_name" "$@"
}
public_watch() {
exec screen -dr "$1"
}
public_active() {
exec screen -ls
}
public_ls() {
echo "Available machines:"
exec ls "$bin"
}
diskpath() {
printf "%s.qcow2" "${images}/${1}"
}
public_diskadd() {
exec qemu-img create -f qcow2 "$(diskpath "$1")" "$2"
}
public_diskrm() {
exec rm -vi -- "$(diskpath "$1")"
}
public_diskls() {
echo "Available disks:"
exec ls "$images"
}
public_edit() {
local file="${bin}/${1}"
"$EDITOR" "$file"
exec chmod u+x "$file"
}
public_rm() {
exec rm -vi -- "${bin}/${1}"
}
public_shell() {
exec bash -i
}
public_cat() {
exec "$cat" "${bin}/${1}"
}
function="$1"
shift
if [ -z "$function" ]; then
public_active
elif declare -F | cut -d \ -f 3- | grep '^public_' | sed 's/^public_//' | grep -q "^${function}$"; then
"public_${function}" "$@"
else
error_usage
fi