Reset state between queries

Owning up to the problem we have a global state in the executor. Make sure it gets reset between calls.

Improve error messages

• When duplicate meta_data blocks that should be the same but aren't, give the user some hint as to what we are looking at.

2.0b1

What's Changed

• Support MetaData by @gordonwatts in #177
• Add JobOptions Injection by @gordonwatts in #180
• Link Libraries attached to collections by @gordonwatts in #183
• Fixes the event info bug by @gordonwatts in #184
• Enable Local Dataset Running by @gordonwatts in #185
• MetaData Improvements by @gordonwatts in #186
• Fix First scoping bug by @gordonwatts in #187
• Merge Common Body MD by @gordonwatts in #188
• Support bool constants in the code by @gordonwatts in #189
• Code Injection Improvements by @gordonwatts in #190
• Strings Are First-Class Citizen by @gordonwatts in #192
• Mount a docker volume as a cache by @gordonwatts in #194
• Build working with new ast packages by @gordonwatts in #195

Full Changelog: 1.4.1...2.0b1

Local dataset running for the C++ backend

Enables using the full local servicex client when running on a local file

• requires docker to run
• You must install the local variant: func_adl_xAOD[local].
• A list of local files is processed into a single analysis file

This is built more along the lines of testing rather than for production. That is for some time in the future if it is needed!

Fixes EventInfo regression

The last release broke access to the EventInfo object - or any object that isn't in a collection. This fixes it.

Link libraries are specified as part of event collection metadata

• Only link libraries that are needed
• Need is encoded in the event collections one uses
• Metadata also carries this information with the link_libraries key.

Metadata Hanlding

Metadata can now be used to send over the wire:

• C++ Functions
• New type declarations (for when something isn't returning a double, e.g. another object)
• New collections

This works for both CMS and ATLAS C++ backends

Updated versoin of func_adl

This is a bug-fix release:

• Use a released version of the func_adl package

PyHEP Upgrade Release

These changes and fixes came from our stress test running on the CMS Run 1 AOD Data for the Higgs Rediscovery

• Added more CMS AOD Type info (far from complete!)
• Upgrade to modern version of awkward for behind-the-scenes work
• Now possible to do null checks - isNonNull from CMS, specifically. Implemented as an add-on function, not something that is central to the design of the code generator, unfortunately.
• One can now extract member variables of C++ structs and classes
• If the top level Select statement is resolves to a dictionary, then a ROOT file with columns the names of the dictionary items will be written out automatically (no need for AsROOT or etc.). This brings it in line with uproot's transformer support.
• Much like tuple resolution, one now has inline dict resolution. This should make it much easier to build new data models on the fly if need be.
• Fixed a bug in scoping of representations, which should make deeply nested statement translation (more) robust.
• Added the "**" python operator (pow in C++)
• Technical debt, some of it at least, repaied.
• Improvements to test coverage

Fix up data file output directory

Make sure the output file directory goes in the right place for CMS