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|
#!/bin/bash
# This file is public domain.
#
# This is an interactive command line utility to handle scripts and
# use cases (an use case is a scripts that opens everything needed for
# the user to perform a task).
#
# In order to allow any programming language, your script must have
# a sha-bang (#!) line. If you want it to start a GUI, you can use
# nohup in the command line. Using nohup in the sha-bang has the
# potential unwanted effects of exploding (if you forget to put the
# name of the shell after the word 'nohup') or scattering nohup.out
# files all over the place (if you start it from different places),
# so it's discouraged.
#
# The environment variables affecting this program are:
# $USE_DIR: The directory to store (and read) the scripts. By
# default, it is '~/.userc'.
# $EDITOR: The text editor to edit the scripts. By default, it is
# 'nano'.
# $SHOW: The default command to show the scripts (not editing). By
# default, it is 'less' (you can use cat, nano...).
# Normalize environment variables.
USE_DIR=${USE_DIR:-~/.userc}
[ "$USE_DIR" != / ] && USE_DIR=${USE_DIR%/}
EDITOR=${EDITOR:-nano}
SHOW=${SHOW:-less}
# If if doesn't exist, create it if possible.
if [ ! -d "$USE_DIR" ]; then
if [ -e "$USE_DIR" ]; then
echo "$0: $USE_DIR: Not a directory."
exit
elif mkdir -p "$USE_DIR"; then
echo "$0: Created directory '$USE_DIR'."
else
exit
fi
fi
# Check read/list permissions.
if [ ! -r "$USE_DIR" -o ! -x "$USE_DIR" ]; then
echo "$0: $USE_DIR: Unable to access directory contents."
exit
fi
cd "$USE_DIR"
# Functions
user_wait() {
echo -n "Press any key to continue..."
read
}
error_ro() {
echo "$0: $USE_DIR: Read-only directory."
user_wait
}
read_num () {
echo -n "Script number: "
read num
while [ -z "${use[num]}" ]; do
[ -z "$num" ] && return 0
echo "$0: Invalid number."
echo -n "Script number: "
read num
done
return 0
}
new_script () {
if $writable; then
echo -n "Name: "
read name
[ -z "$name" ] && return 0
touch "$name"
chmod +x "$name"
$EDITOR "$name"
else
error_ro
fi
}
delete_script () {
if $writeable; then
read_num
rm "${use[num]}"
else
error_ro
fi
}
edit_script () {
read_num
while [ ! -w "${use[num]}" ]; do
echo "$0: ${use[num]}: Read-only file."
read_num
done
$EDITOR "${use[num]}"
}
rename_script () {
if $writeable; then
read_num
echo -n "New name: "
read name
[ -z "$name" ] && return 0
mv "${use[num]}" "$name"
else
error_ro
fi
}
show_script () {
read_num
$SHOW "${use[num]}"
}
# Menu
menu () {
clear
# Check write permission.
if [ -w "$USE_DIR" ]; then
writeable=true
else
echo "NOTE: Running in read-only mode."
writeable=false
fi
# Get directory contents
typeset -i cnt=0
use[0]=""
for f in *; do
if [ -f "$f" -a -x "$f" ]; then
cnt=cnt+1
use[cnt]=$f
fi
done
# Start listing options
if $writeable; then
echo " n) New script"
echo " d) Delete script"
echo " r) Rename script"
fi
echo " e) Edit script"
echo " s) Show script"
for i in `seq $cnt`; do
echo -n " $i) ${use[i]}"
[ ! -w "${use[i]}" ] && echo -n " (read only)"
echo
done
# Ask
echo
echo -n "Choose an option: "
read opt
case $opt in
n|N) new_script ;;
d|D) delete_script ;;
e|E) edit_script ;;
r|R) rename_script ;;
s|S) show_script ;;
*)
if [ -n "${use[opt]}" ]; then
"$USE_DIR/${use[opt]}"
exit
fi
esac
}
while true; do
menu
done
|
