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#!/bin/bash
# Original Author: Alexander Epstein https://github.com/alexanderepstein
currentVersion="1.10.0"
configuredClient=""
search="0"
insensitive=""
recursive=""
boundry=""
## This function determines which http get tool the system has installed and returns an error if there isnt one
getConfiguredClient()
{
if command -v curl &>/dev/null ; then
configuredClient="curl"
elif command -v wget &>/dev/null ; then
configuredClient="wget"
elif command -v fetch &>/dev/null ; then
configuredClient="fetch"
else
echo "Error: This tool reqires either curl, wget, or fetch to be installed."
return 1
fi
}
## Allows to call the users configured client without if statements everywhere
httpGet()
{
case "$configuredClient" in
curl) curl -A curl -s "$@";;
wget) wget -qO- "$@";;
fetch) fetch -o "...";;
esac
}
checkInternet()
{
echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1 # query google with a get request
if [ $? -eq 0 ]; then #check if the output is 0, if so no errors have occured and we have connected to google successfully
return 0
else
echo "Error: no active internet connection" >&2 #sent to stderr
return 1
fi
}
usage()
{
echo "Cheat tool"
echo "Usage: cheat [flags] [command] or cheat [flags] [programming language] [subject]"
echo " -s Does a search for last argument rather than looking for exact match"
echo " -i Case insensitive search"
echo " -b Word boundaries in search"
echo " -r Recursive search"
echo " -h Show the help"
echo " -v Get the tool version"
echo "Special Pages:"
echo " hello Describes building the hello world program written in the language"
echo " list This lists all cheatsheets related to previous arg if none it lists all cheatsheets"
echo " learn Shows a learn-x-in-minutes language cheat sheet perfect for getting started with the language"
echo " 1line A collection of one-liners in this language"
echo " weirdness A collection of examples of weird things in this language"
}
getCheatSheet()
{
if [[ $# == 1 ]]; then
if [[ $search == "1" ]];then
link=cheat.sh/~$1
else
link=cheat.sh/$1
fi
else
link=cheat.sh/$1
fi
if [[ $# == 2 ]];then
if [[ $search == "1" ]];then
link+=/~$2
else
link+=/$2
fi
fi
if [[ $insensitive != "" || $recursive != "" || $boundry != "" ]];then link+=/$boundry$insensitive$recursive; fi
httpGet $link
}
checkSpecialPage()
{
temp=$1
if [[ $1 == "list" ]];then
temp=":list"
elif [[ $1 == "learn" ]];then
temp=":list"
elif [[ $1 == "styles" ]];then
temp=":styles"
fi
if [[ $2 == "1" ]];then
arg1=$temp
else
arg2=$temp
fi
}
getConfiguredClient || exit 1
#checkInternet || exit 1
while getopts "ribuvhis" opt; do
case $opt in
\?)
echo "Invalid option: -$OPTARG" >&2
exit 1
;;
h)
usage
exit 0
;;
v)
echo "Version $currentVersion"
exit 0
;;
i)
insensitive="i"
search="1"
;;
b)
boundry="b"
search="1"
;;
r)
recursive="r"
search="1"
;;
s)
search="1"
;;
:)
echo "Option -$OPTARG requires an argument." >&2
exit 1
;;
esac
done
for arg
do
if [[ $arg != "-r" && $arg != "-s" && $arg != "-b" && $arg != "-i" ]];then
if [ -z ${arg1+x} ];then
arg1=$arg
fi
if [ ! -z ${arg1+x} ];then
arg2=$arg
fi
fi
done
checkSpecialPage $arg1 1
checkSpecialPage $arg2 2
if [[ $# == 0 ]]; then
usage
exit 0
elif [[ $1 == "help" || $1 == ":help" ]];then
usage
exit 0
else
if [[ $arg1 != $arg2 ]];then
getCheatSheet $arg1 $arg2
else
getCheatSheet $arg1
fi
exit 0
fi