oe_get could import partial OSM extracts without raising warning or messages

[agila5]

Consider the following example.

# packages
library(osmextract)
#> Data (c) OpenStreetMap contributors, ODbL 1.0. https://www.openstreetmap.org/copyright.
#> Check the package website, https://docs.ropensci.org/osmextract/, for more details.
library(sf)
#> Linking to GEOS 3.9.0, GDAL 3.2.1, PROJ 7.2.1

Import Greater London road network considering only primary, secondary, and tertiary highways

greater_london <- oe_get(
  place = "Greater London", 
  vectortranslate_options = c(
    "-f", "GPKG", 
    "-overwrite", 
    "-where", "highway IN ('primary', 'secondary', 'tertiary')",
    "lines"
  )
)
#> The input place was matched with: Greater London
#> The chosen file was already detected in the download directory. Skip downloading.
#> Start with the vectortranslate operations on the input file!
#> 0...10...20...30...40...50...60...70...80...90...100 - done.
#> Finished the vectortranslate operations on the input file!
#> Reading layer `lines' from data source `C:\Users\Utente\Documents\osm-data\geofabrik_greater-london-latest.gpkg' using driver `GPKG'
#> Simple feature collection with 27950 features and 9 fields
#> Geometry type: LINESTRING
#> Dimension:     XY
#> Bounding box:  xmin: -0.5102405 ymin: 51.28324 xmax: 0.3308773 ymax: 51.69751
#> Geodetic CRS:  WGS 84

Then, after a few weeks, I forget about the vectortranslate query and import Greater London data again:

oe_get("Greater London")
#> The input place was matched with: Greater London
#> The chosen file was already detected in the download directory. Skip downloading.
#> The corresponding gpkg file was already detected. Skip vectortranslate operations.
#> Reading layer `lines' from data source `C:\Users\Utente\Documents\osm-data\geofabrik_greater-london-latest.gpkg' using driver `GPKG'
#> Simple feature collection with 27950 features and 9 fields
#> Geometry type: LINESTRING
#> Dimension:     XY
#> Bounding box:  xmin: -0.5102405 ymin: 51.28324 xmax: 0.3308773 ymax: 51.69751
#> Geodetic CRS:  WGS 84

The vectortranslate conversion is skipped, and oe_get imports the OSM data that were filtered during the previous call to oe_get().

I think that we can implement the following solution. Create a hidden folder within the download_directory with several .txt files that flag if a particular OSM extract was converted using ad-hoc vectortranslate options.