Thank you for the amazing action!

[berezovskyi]

@elytvyno @pheyvaer thanks for making this action!

I just set it up on my repo to convert some random JSON files into minimal W3C SPARQL 1.2 Service Description dumps. I used R2RML ca. 10 years ago and using your tool and YARRRML is a breeze!

I have some feedback, I will paste it below but if you have interest to take it further, I can split it up into one issue per item (and, cautiously, maybe can submit PRs - never developed GH actions before, though):

• support for dir separators in the glob - GLOBAL_PATTERN: "blabla/*.yml" fails because find does not like it (‘-name’ matches against basenames only, but the given pattern contains a directory separator (‘/’), thus the expression will evaluate to false all the time. Did you mean ‘-wholename’?)
• avoid committing state into the repo (rml_action_meta) - would be good to put it behind a flag. But, perhaps, you wanted to avoid spurious changes by RDF resource reordering - https://www.w3.org/TR/rdf-canon/ could be helpful.
• add a flag for pretty-printed Turtle - mainly blank nodes but not critical; may be related to https://www.w3.org/TR/rdf-canon/
• Node 16 deprecation address - switch to Node 20; see https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/
• Update README with latest checkout@v2 action declaration
• ignore empty string - example (I think this is due to bad JSON where the key was present with the "" value - would be good to have some processor to ignore that and treat such props as missing)
• try git pull --rebase before push - otherwise the action run and all re-runs fail if a new push was made to the repo
• do not run npm i, it can change installed deps between executions; add a lockfile and run npm ci - though I am not an expert in JS
• configurable suffix instead of _output including no suffix
• the action is a wee bit behind the RMLio/rmlmapper-java releases

Again, this GH Action and YARRRML are seriously good! Thank you so much.