A bash script used to minify other bash scripts.

This script will attempt convert any bash script to a one liner (or two lines if counting the shebang) using a state aware parser. This is not always possible for a valid bash syntax, for example with heredocs, which will be left in place.

Usage

Example usage:

./bash-minifier.sh -f="$HOME/Desktop/test.sh" This will minify a script named "test.sh" on the desktop and output its content to stdout.

./bash-minifier.sh -f="$HOME/Desktop/test.sh" -o="$HOME/Desktop/output.sh" This will do the same, but will write the output to a file named "output.sh", and give it execution permissions(due to default settings not overrun), on the users desktop.

./bash-minifier.sh < $HOME/Desktop/test.sh > $HOME/Desktop/output.sh This will read from STDIN and write to STDOUT; because of the redirection, this works the same way as the previous example.

./bash-minifier.sh -F -f="$HOME/Desktop/test.sh" -o="$HOME/Desktop/output.sh" -p=u-r This will minify and write the script to desktop, and remove read access for the current user from it.

Supported options

File

-f or --file

Requires a parameter

This option chooses what file to read from.

Example: ./bash-minifier.sh -f=test.sh

Force

-F or --force

Should not be supplied with a parameter.

Disabled by default

If this option is enabled the script will skip any security checks and will therefore not prompt the user at any time.

Example: ./bash-minifier.sh -F -f=test.sh

Output

-o or --output

Requires a parameter

Defaults to STDOUT

This option specifies where to send the output.

STDOUT will simply send the output to stdout.

File will write the output to a file. To activate this option, simply specify a file path. If a file already exists in the filepath, the script will prompt the user and ask if the file should be overwritten.

Examples: ./bash-minifier.sh -F -f=test.sh -o=STDOUT
./bash-minifier.sh -F -f=test.sh -o="$HOME/Desktop/output.sh" 

Permission

-p or --permission

Requires a parameter

Defaults to u+x

This option will, in case of the output being a file, set the file permission to the content of the parameter

Example: ./bash-minifier.sh -F -f=test.sh -o=$HOME/Desktop/output.sh -p=u-r

Version

-V or --version

Outputs script version

Example: ./bash-minifier.sh -V

Exit codes

0: Everything went well
1: Unknown error
2: User declined to continue when warned
3: File does not exist
4: Unknown argument supplied to script
5: This script will not minify itself
6: Unknown output mode encountered