Added top-level comaprator script

[judovana]

Hello! I believe the #3991 was closed due to not understanding waht it is doing.

This script is not doing any rebuild, and thus is not comparing on identity, but on binary identically builds only. As it is, it do ot have any similar work present in the toolchain. Can you please reconsider its inclusion?

maybe the in file/main readme:

# This is top level script for comparing two jdks.  It 
# This script expects exactly two args - tag:os.arch/dir/archive, two times
# eg: compare_builds.sh  /usr/lib/jvm/java-21-openjdk /my/home/my_custom_tarball.tar.xz
# eg: compare_builds.sh  /my/custom/dir/with_jdk jdk-21.0.4+7:windows.x64
# if the parameter is tag, the temurin jdk of given tag:os.arch is downloaded
# yo can omit the :os.arch part, then it will be guessed... but you may know better
# It copies and creates all in CWD!!!!
# Pass the files/dirs as absolute values, it should not be that hard
# It is useful to have JAVA_HOME pointing to some other JDK used to compile and run supporting files
# otherwise one of the provided JDKs will be duplicated, and used
# for your own safety, do not run it as root
#
# The JDK you are comparing is launched to get various info about itself
# If you need to compare jdks on different platform then they are for, you need to go manually.

is misleading?

[judovana]

Thje label is not correct this is cygwin (thus windows) and linux

[judovana]

Hello good people. Anybody around? The #3991 was closed as duplicate, and there is no duplicate toolchain. All the tools are written, but the readme is quite complex, and one must follow it. In addition there are quite a few corenr cases.

This script remains valid contribution, which is putting it all together. I found small intersection with detection of signtool, but thats all.

[karianna]

needs linter fixes to start with.

[judovana]

@karianna the linter is all green, but the job never finishes and timeouts:(