Hi, I was playing around with inotifywait (great tool!) to see the new staged installation of source packages in action. In one terminal I'm monitoring the create/delete/move events of the installation library with:
inotifywait -m --timefmt '%F %T' --format '%T -- %w %e %f' -e create -e delete -e move path/to/R/library/ While in another terminal I install CRAN package abc with: R CMD INSTALL abc_2.1.tar.gz All deps are already installed. ## With R 3.5 When installing abc the first time with R 3.5 inotifywait reports the following events: 2019-04-24 16:57:42 -- /home/hpages/R/R-3.5.r75051/library/ CREATE,ISDIR 00LOCK-abc 2019-04-24 16:57:42 -- /home/hpages/R/R-3.5.r75051/library/ CREATE,ISDIR abc 2019-04-24 16:57:45 -- /home/hpages/R/R-3.5.r75051/library/ DELETE,ISDIR 00LOCK- Then on subsequent times: 2019-04-24 16:58:14 -- /home/hpages/R/R-3.5.r75051/library/ CREATE,ISDIR 00LOCK-abc 2019-04-24 16:58:14 -- /home/hpages/R/R-3.5.r75051/library/ MOVED_FROM,ISDIR abc 2019-04-24 16:58:14 -- /home/hpages/R/R-3.5.r75051/library/ CREATE,ISDIR abc 2019-04-24 16:58:17 -- /home/hpages/R/R-3.5.r75051/library/ DELETE,ISDIR 00LOCK-abc IIUC the additional 'MOVED_FROM,ISDIR abc' event on subsequent installs is triggered by the backing up of the earlier installation in case the new installation fails. ## With R 3.6 First installation: 2019-04-24 17:09:04 -- /home/hpages/R/R-3.6.r76385/library/ CREATE,ISDIR 00LOCK-abc 2019-04-24 17:09:04 -- /home/hpages/R/R-3.6.r76385/library/ CREATE,ISDIR abc 2019-04-24 17:09:08 -- /home/hpages/R/R-3.6.r76385/library/ MOVED_TO,ISDIR abc 2019-04-24 17:09:09 -- /home/hpages/R/R-3.6.r76385/library/ DELETE,ISDIR 00LOCK-abc Subsequent installations: 2019-04-24 17:09:59 -- /home/hpages/R/R-3.6.r76385/library/ CREATE,ISDIR 00LOCK-abc 2019-04-24 17:09:59 -- /home/hpages/R/R-3.6.r76385/library/ MOVED_FROM,ISDIR abc 2019-04-24 17:09:59 -- /home/hpages/R/R-3.6.r76385/library/ CREATE,ISDIR abc 2019-04-24 17:10:02 -- /home/hpages/R/R-3.6.r76385/library/ MOVED_TO,ISDIR abc 2019-04-24 17:10:03 -- /home/hpages/R/R-3.6.r76385/library/ DELETE,ISDIR 00LOCK-abc IIUC the new 'MOVED_TO,ISDIR abc' event is triggered by the package installation folder being moved from the temporary location to the final location. However I wonder about the CREATE,ISDIR abc event. It looks like even for a staged installation tools:::.install_packages() still creates the empty abc dir. This should no longer be necessary because this empty folder is replaced later by the 'MOVED_TO,ISDIR abc' event. Am I missing something? Another thing: the times indicate that the 'MOVED_TO,ISDIR abc' event (move from temp to final location) happens about 3-4 seconds after the 'MOVED_FROM,ISDIR abc' event (backing up). In this interval of time, the abc package is missing. Wouldn't it be safer to leave the earlier installation where it is and to replace it when the new installation folder is moved from the temporary location to the final location? Said otherwise, the backing up step no longer seems necessary with staged installs. So inotifywait would report something like this: 2019-04-24 17:09:59 -- /home/hpages/R/R-3.6.r76385/library/ CREATE,ISDIR 00LOCK-abc 2019-04-24 17:10:02 -- /home/hpages/R/R-3.6.r76385/library/ MOVED_TO,ISDIR abc 2019-04-24 17:10:03 -- /home/hpages/R/R-3.6.r76385/library/ DELETE,ISDIR 00LOCK-abc That is, only 3 events. On first and subsequent installation. Cheers, H. > sessionInfo() R version 3.6.0 beta (2019-04-12 r76385) Platform: x86_64-pc-linux-gnu (64-bit) Running under: Ubuntu 16.04.5 LTS Matrix products: default BLAS: /home/hpages/R/R-3.6.r76385/lib/libRblas.so LAPACK: /home/hpages/R/R-3.6.r76385/lib/libRlapack.so locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=en_US.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] compiler_3.6.0 -- Hervé Pagès Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpa...@fredhutch.org Phone: (206) 667-5791 Fax: (206) 667-1319 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
