rshell is a simple shell originally created collaboratively by me and a classmate for CS100 at UCR. It supports execution of commands in $PATH and standard bash connectors like &&, ||, and ;, as well as IO redirection/piping with <, >, and |. There is also a test function to check whether a file exists with the -e flag, whether a file is a directory with the -d flag, and whether a file is a regular file with the -f flag. Unlike the GNU test command, test will also output (True) or (False) depending on the result. For example, test -d src would output (True) and return true if you were in the repo's root directory. The syntax [ -d src ] is also supported. In addition, parentheses are supported for control of precedence, as in (echo a && echo b) || echo c, and quotes can be used as in echo "hi". Anything after a # is treated as a comment and ignored. Finally, the shell can be exited by running exit.
git clone --recurse-submodules https://github.com/Zarhult/rshell.git
cd rshell
cmake .
make
This will generate the rshell executable as well as a test executable that runs the unit tests.