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# Copyright (C) 2013-2015 Miquel Sabaté Solà <mikisabate@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# Print the usage string.
__g_usage() {
echo "usage: g [-h | --help] [-v | --version] <command> [<args>]"
}
# Print the help message.
__g_help() {
__g_usage
echo -e "\nThe g commands are:"
tab=$'\t'
column -t -s $'\t' <<HERE
add${tab}Add a new shortcut.
rm${tab}Remove a shorcut.
list${tab}List all the available shortcuts.
HERE
}
# Fill the hash of shortcuts with the contents of the __g_file.
__g_get_shortcuts() {
local i=0 word=""
__g_shortcuts=()
while read line; do
if [ ! -z "$line" ]; then
if [ "$word" = "" ]; then
word=$line
else
__g_shortcuts[$word]=$(eval echo $line)
word=""
fi
i=$(($i+1))
fi
done < $__g_file
}
# Save the computed shortcuts into the __g_file.
__g_save_shortcuts() {
# Erase the contents of the __g_file.
:>$__g_file
# Finally write the hash into the __g_file.
for i in "${!__g_shortcuts[@]}"; do
echo "$i" >> $__g_file
echo "${__g_shortcuts[$i]}" >> $__g_file
done
}
# Returns true if the given parameter is a keyword, false otherwise.
__g_is_keyword() {
case "$1" in
add | rm | list | -v | --version | -h | --help)
return 0
;;
*)
return 1
esac
}
# It returns a string with all the elements of the given array joined by slash
# characters.
__g_join_path() {
local IFS="/"; echo "$*";
}
# Replacement for the non-standard `realpath` command. Implemented taken from
# https://github.com/travis-ci/gimme.
__g_realpath() {
[ -d "$1" ] && echo "$(cd "$1" && pwd)" || echo "$(cd "$(dirname "$1")"
&& pwd)/$(basename "$1")"
}
# The main function for this script.
g() {
version="0.3.9"
cmd="$1"
if [ -z "$cmd" ]; then
__g_help
return 1
fi
__g_file=$HOME/.gfile
declare -A __g_shortcuts
# Make sure that the __g_file actually exists.
if [ ! -z "$GFILE" ]; then
__g_file="$GFILE"
fi
touch $__g_file
# Parse the command.
case "$cmd" in
-v | --version)
echo "g version $version"
;;
-h | --help)
__g_help
;;
add)
if [ "$#" = "2" ]; then
path=`pwd`
else
if [ "$#" = "3" ]; then
path=$3
else
echo "usage: g add <name> [path]"
return 1
fi
fi
if __g_is_keyword $2; then
echo "Cannot use '$2': keyword."
return 1
fi
__g_get_shortcuts
__g_shortcuts[$2]=$(__g_realpath $path)
__g_save_shortcuts
;;
rm)
if [ "$#" != "2" ]; then
echo "usage: g rm <name>"
return 1
fi
__g_get_shortcuts
unset __g_shortcuts[$2]
__g_save_shortcuts
;;
list)
__g_get_shortcuts
if [[ "$#" = "2" && "$2" = "--keys" ]]; then
str=""
for i in "${!__g_shortcuts[@]}"; do
str="$str $i"
done
echo $str
else
for i in "${!__g_shortcuts[@]}"; do
echo -e "$i\t=> ${__g_shortcuts[$i]}"
done | sort | column -t -s $'\t'
fi
;;
*)
__g_get_shortcuts
# Split the path and check whether the first element is a shortcut or
# not.
IFS='/' read -a path <<< $cmd
init=${path[0]}
if [ -z ${__g_shortcuts[$init]} ]; then
echo -e "Unknown shortcut \`$init'.\n"
__g_usage
return 1
else
# Expand the shortcut and append the remaining parts of the path.
path[0]="${__g_shortcuts[$init]}"
cd $(__g_join_path ${path[@]})
fi
;;
esac
return 0
}
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