[R-pkg-devel] R CMD build --resave-data not working

[Ben Bolker]

   Hmm, I may have written too quickly.  I find these lines from R CMD 
build --help confusing:


  --resave-data=        re-save data files as compactly as possible:
                         "no", "best", "gzip" (default)
   --resave-data         same as --resave-data=best

The first line suggests that gzip compression is the default.  The 
second suggests that "best" is the default.  And are we supposed to use 
quotation marks or not ... ?

   In any case, --resave-data=best and --resave-data="best" both seem 
worth a try.


On 3/11/21 3:57 PM, Jonathan Callahan wrote:
> I am building a package using R 4.0.4 on OS X 10.15.7.
> 
> In a terminal I type:
> 
> R CMD build --resave-data AirSensor
> 
> Then, I check with:
> 
> R CMD check --as-cran AirSensor_1.0.8.tar.gz
> 
> Everything is fine until I see:
> 
> 
> * checking data for ASCII and uncompressed saves ... WARNING
> 
> 
> 
>    Note: significantly better compression could be obtained
> 
>          by using R CMD build --resave-data
> 
>                              old_size new_size compress
> 
>    example_pas.rda              1.6Mb    1.1Mb       xz
> 
>    example_pas_raw.rda          114Kb     86Kb       xz
> 
>    example_pat.rda              965Kb    444Kb       xz
> 
>    example_pat_failure_A.rda    527Kb    259Kb       xz
> 
>    example_pat_failure_B.rda    411Kb    198Kb       xz
> 
>    example_sensor_scaqmd.rda    108Kb     76Kb       xz
> 
> I get the same WARNING if I submit to win-builder.R-project.org.
> 
> I've built many packages in the past and am currently stumped as to what
> might be happening.
>