Access tag elements from R's Rd file

A function to extract elements from R's help file.

It is useful, for example, for going through a package and discover who are its authors (useful for me to help me give proper credit in the DESCRIPTION file).

fetch_tag_from_Rd(package, tag = "\\author", ...)

Arguments

package	a character string of the package we are interested in.
tag	a character vector of tag(s) to get from a package's Rd files.
...	not in use.

Source

https://stackoverflow.com/questions/17909081/access-elements-from-rs-rd-file

Value

a character vector with the tag's content, and the name of the Rd source of the function the tag came from.

See also

package_authors

Author

Thomas J. Leeper <thosjleeper@gmail.com>

Examples

if (FALSE) {
fetch_tag_from_Rd("installr", "\\author")
fetch_tag_from_Rd("knitr", "\\author")
fetch_tag_from_Rd("lubridate", "\\author")

fetch_tag_from_Rd("installr", "\\source")

# get all the authors for this package
unique(unname(fetch_tag_from_Rd("installr", "\\author")))

fetch_tag_from_Rd("installr", "\\author")
package_authors("installr")

}