[ENH] Dev-ops, N+1 offset, temporary directory

[anibalsolon]

This PR:

• changes cmake setup to use conan as its library manager
• downloads and points unit tests to the data dir
• changes the logic to use N+1 offset
• implements the temp dir logic from python
• documents on how to run things
• improves example
• improves unit testing based on the python implementation
• implements benchmark run/stats
• add CI using Github Actions

[frheault]

I think the changes look great!

The next item on the list is about .
Maybe after that item, I can try to run the test on my new computer and see if it works?

[arokem]

On my mac, I am currently seeing:

(base) ➜  build git:(enh/devops) cmake .. && make
-- The C compiler identification is AppleClang 11.0.3.11030032
-- The CXX compiler identification is AppleClang 11.0.3.11030032
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Current conanbuildinfo.cmake directory: /Users/arokem/source/trx-cpp/build
-- Found GTest: /Users/arokem/.conan/data/gtest/cci.20210126/_/_/package/aafb7f47234990db9077ed87e3f6c6c9c0e84a95/lib/libgtest.a  
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/arokem/source/trx-cpp/build
[ 25%] Building CXX object CMakeFiles/trx.dir/src/trx.cpp.o
In file included from /Users/arokem/source/trx-cpp/src/trx.cpp:1:
In file included from /Users/arokem/source/trx-cpp/include/trx/trx.h:297:
/Users/arokem/source/trx-cpp/src/trx.tpp:1089:39: error: use of undeclared
      identifier 'canonicalize_file_name'
        std::string directory = (std::string)canonicalize_file_name(path...
                                             ^
1 error generated.
make[2]: *** [CMakeFiles/trx.dir/src/trx.cpp.o] Error 1
make[1]: *** [CMakeFiles/trx.dir/all] Error 2
make: *** [all] Error 2

[frheault]

Great! It all worked!

Just so you know, here are small things I had to do:

After creating the profile, CONAN warn me of 'WARNING: GCC OLD ABI COMPATIBILITY' and told me I likely needed to run this command.
conan profile update settings.compiler.libcxx=libstdc++11 .conan

Then since I used CONAN before when I ran conan install --build=missing --settings=build_type=Debug --profile ./.conan .. I had to add the --update parameters.

Then CMAKE warned me that GTEST was missing,

so I googled it and I installed this:
sudo apt-get install libgtest-dev

And then the build and test worked!

PS: I see the file in ./examples/load_trx.cpp should work but and I see it in the CMAKE, but where is it being built?

[anibalsolon]

@frheault good that it is working now- yes, this command is included in the README

The gtest should have been installed via conan, not sure why it didnt find

[frheault]

@anibalsolon Was I doing something wrong or was the file in ./examples/load_trx.cpp not build?

[frheault]

@anibalsolon Is there something I can run or test before of meeting this afternoon?

[anibalsolon]

@frheault not really- we may need to discuss some design decisions about the cpp implementation today