This program can be used to reduce an Ada code base to a smaller code base while maintaining a base property. It is typically used for minimising a bug reproducer.
Get a Python 3.7+ interpreter, install Libadalang's Python bindings and then run:
pip install /path/to/your/adareducer/clone
The interface is similar to that of the C-Reduce program for C/C++ code bases:
adareducer project_file oracle.sh
Where project_file is the path to a valid .gpr project file, and
oracle.sh is a bash script which returns 0 as long as the program satisfies
the base property that you are testing for, and non-zero otherwise.
For instance, if you are interested in reducing the program while maintaining the property that a particular file contains the text "hello", the oracle might contain something like this:
grep "hello" foo.adb
If you are interested in getting the minimum program that compiles and prints "hello", the oracle might look like this:
# Build the program and exit if the program doesn't build
# Note the -m2 switch: this tells gprbuild not to look at the
# timestamps, but the checksum
gprbuild -m2 -P p.gpr || exit 1
# Launch the program and verify that it prints "hello"
./main | grep "hello"