[ltertools] Develop expand_key Function

[njlyon0]

Summary

Both CAGED and Resilience (the two working groups in this cohort) have reminded me that data discovery is an iterative process and that the harmonize and begin_key functions currently in the ltertools R package don't really reflect this. There would be value in a function that creates the first two columns of the data key but only for datasets not already in the harmonized data file.

Starting Tasks

• Draft expand_key function
• Do needed tweaks for roxygen format
• Consider releasing new version to CRAN

Useful links

• ltertools GitHub repo: lter / ltertools

[njlyon0]

This was specifically prompted by #40 (though also partially inspired by #34 )

[njlyon0]

New Function Implemented

expand_key is now officially part of ltertools (at least in the GitHub version). I also added unit tests and added it to the vignette, NEWS, and README files (should have been in my first pass of sub-tasks but I forgot to include them).

I'm going to consider overnight whether it's worth another release to CRAN because this function is the only change from the prior version so in some ways it feels premature even if it would make it (marginally) easier to access this function

[njlyon0]

Releasing New Version to CRAN

It's a small change from the prior version but I think the ease of installation for a formal CRAN update relative to using the GitHub / dev version is worth the release process. Just incremented from 1.1.0 to 1.2.0 and submitted to CRAN so hopefully they get that up into the official package space soon (and don't find any errors I missed)

New Sub-Tasks

• Await feedback / decision from CRAN reviewer(s)
  • Implement feedback (if any) and resubmit to CRAN
• After acceptance, create a new GitHub release for v1.2.0
• Then update DESCRIPTION and NEWS to new development version

[njlyon0]

v1.2.0 on CRAN!

Lightning fast response from CRAN reviewer and 1.2.0 is now up on CRAN. Just made the release on the GitHub side of things (see here). Just incremented the package documentation to version 1.2.0.900