Add a Tag to a Cached Object in the Repository

This hidden function appends a single tag (key-value pair) to the metadata of a cached object identified by its cacheId. Tags can be stored either in a database (via DBI) or in a file-based cache system.

Updates the value of an existing tag for a cached object identified by its cacheId. If the tag does not exist and add = TRUE, the tag will be added. This function supports both database-backed and file-based cache systems.

.addTagsRepo(
  cacheId,
  cachePath = getOption("reproducible.cachePath"),
  tagKey = character(),
  tagValue = character(),
  cacheSaveFormat = getOption("reproducible.cacheSaveFormat"),
  drv = getDrv(getOption("reproducible.drv", NULL)),
  conn = getOption("reproducible.conn", NULL)
)

.updateTagsRepo(
  cacheId,
  cachePath = getOption("reproducible.cachePath"),
  tagKey = character(),
  tagValue = character(),
  add = TRUE,
  cacheSaveFormat = getOption("reproducible.cacheSaveFormat"),
  drv = getDrv(getOption("reproducible.drv", NULL)),
  conn = getOption("reproducible.conn", NULL)
)

Arguments

cacheId

character(1) Unique identifier of the cached object. Must be of length 1.

cachePath

character(1) Path to the cache directory. Defaults to getOption("reproducible.cachePath").

tagKey

character(1) The key for the tag. Must be supplied.

tagValue

character(1) The new value for the tag. Must be supplied.

cacheSaveFormat

character(1) Format used for saving cache files. Defaults to getOption("reproducible.cacheSaveFormat").

drv

A DBI driver object. Defaults to getDrv(getOption("reproducible.drv", NULL)).

conn

A DBI connection object. If NULL, a new connection is created internally.

add

logical(1) If TRUE, adds the tag if it does not exist. Defaults to TRUE.

Value

NULL (invisibly). The function is called for its side effects.

NULL (invisibly). Called for its side effects.

Details

This function is primarily used internally by the reproducible package to maintain metadata about cached objects. It supports both database-backed and file-based caching systems.

• If useDBI() returns TRUE, the tag update is performed in the database table.

• If no rows are affected and add = TRUE, the tag is inserted using .addTagsRepo().

• For file-based caches, the function modifies the tag in the corresponding metadata file.

See also

.addTagsRepo() for adding tags without updating.

Examples

if (FALSE) { # \dontrun{
a <- Cache(rnorm(1))
.addTagsRepo(cacheId = gsub("cacheId:", "", attr(a, "tags")),
             tagKey = "status", tagValue = "processed")
showCache() # last entry is the above line
} # }

if (FALSE) { # \dontrun{
a <- Cache(rnorm(1))
# Update an existing tag
.updateTagsRepo(cacheId = gsub("cacheId:", "", attr(a, "tags")),
             tagKey = "status", tagValue = "second")

# Add a tag if it doesn't exist
.updateTagsRepo(cacheId = gsub("cacheId:", "", attr(a, "tags")),
             tagKey = "status", tagValue = "new", add = TRUE)
} # }