$ curl -L YOUR_RELEASE_URL_FROM_GITHUB.tar.gz  -o urlencode.tar.gz
$ tar -xf urlencode.tar.gz
# The following will make the command be globally available in your system
$ mv urlencode /usr/local/bin

git clone https://github.com/your-username/urlencode
cd urlencode
cargo build --release

$ echo "Hello World\!" | urlencode
# Output: "Hello%20World%21%0A"   <--- Please note the %0A at the end of the line, 
#                                      this is because "echo" withouth any flags 
#                                      will output a new line at the end of the string
$ echo -n "Hello World\!" | urlencode
# Output: "Hello%20World%21"

$ echo "Hello%20World%21" | urlencode -d
# Output: "Hello World!"

$ echo -n "TEST AAAABBBB" | urlencode | urlencode | urlencode
# Output TEST%252520AAAABBBB%250A%0A <-- previous new lines get urlencoded as well 

$ echo -n "TEST AAAABBBB" | urlencode -n | urlencode -n | urlencode -n 
# Output: TEST%252520AAAABBBB  <-- no new line

$ urlencode --help
A simple command line utility for URL encoding or decoding stdin.

Usage: urlencode [OPTIONS] [TEXT_TO_PARSE]

Arguments:
  [TEXT_TO_PARSE]  Text to parse, this parameter overrides stdin

Options:
  -d, --decode     Decode stdin instead of encoding
  -n, --nonewline  Do not append a newline to the output
  -h, --help       Print help information
  -V, --version    Print version information