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Ideally, file collections are generated by passing proper file
specifications in a single call to collate(). In reality,
post-processing of the file collection objects is sometimes needed.
Thus, we support a selected number of file collection operations.
You can merge file collections after they are collated. This operation returns the union of the files.
library("pkglite")
pkg <- system.file("examples/pkg1/", package = "pkglite")
fc <- merge(
pkg %>% collate(file_root_core()),
pkg %>% collate(file_r()),
pkg %>% collate(file_r(), file_man())
)
fc
#> -- File collection -------------------------------------------------------------
#> -- Package: pkg1 ---------------------------------------------------------------
#> path_rel format
#> 1 DESCRIPTION text
#> 2 NAMESPACE text
#> 3 NEWS.md text
#> 4 README.md text
#> 5 R/data.R text
#> 6 R/hello.R text
#> 7 R/pkg1-package.R text
#> 8 R/sysdata.rda binary
#> 9 man/dataset.Rd text
#> 10 man/hello_world.Rd text
#> 11 man/pkg1-package.Rd text
#> 12 man/figures/logo.png binaryBy design, one file collection object only stores metadata of files from a single package. Therefore, merging file collections from different packages will result in an error.
To remove files from a file collection, use prune():
fc %>% prune(path = c("NEWS.md", "man/figures/logo.png"))
#> -- File collection -------------------------------------------------------------
#> -- Package: pkg1 ---------------------------------------------------------------
#> path_rel format
#> 1 DESCRIPTION text
#> 2 NAMESPACE text
#> 3 README.md text
#> 4 R/data.R text
#> 5 R/hello.R text
#> 6 R/pkg1-package.R text
#> 7 R/sysdata.rda binary
#> 8 man/dataset.Rd text
#> 9 man/hello_world.Rd text
#> 10 man/pkg1-package.Rd textOnly the files matching the exact relative path(s) will be removed.
The prune operation is type-stable. If all files in a file collection are removed, an empty file collection is returned so that it can still be merged with the other file collections.
pkg %>%
collate(file_data()) %>%
prune(path = "data/dataset.rda")
#> -- File collection -------------------------------------------------------------
#> -- Package: pkg1 ---------------------------------------------------------------
#> [1] path_rel format
#> <0 rows> (or 0-length row.names)A file collection might contain files that should almost always be
excluded, such as the files defined in
pattern_file_sanitize():
pattern_file_sanitize()
#> [1] "/\\.DS_Store$" "/Thumbs\\.db$" "/\\.git$"
#> [4] "/\\.svn$" "/\\.hg$" "/\\.Rproj\\.user$"
#> [7] "/\\.Rhistory$" "/\\.RData$" "/\\.Ruserdata$"You can use sanitize() to remove such files (if any)
from a file collection:
fc %>% sanitize()
#> -- File collection -------------------------------------------------------------
#> -- Package: pkg1 ---------------------------------------------------------------
#> path_rel format
#> 1 DESCRIPTION text
#> 2 NAMESPACE text
#> 3 NEWS.md text
#> 4 README.md text
#> 5 R/data.R text
#> 6 R/hello.R text
#> 7 R/pkg1-package.R text
#> 8 R/sysdata.rda binary
#> 9 man/dataset.Rd text
#> 10 man/hello_world.Rd text
#> 11 man/pkg1-package.Rd text
#> 12 man/figures/logo.png binaryThese binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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