Find a text string in files

Which files in a folder (and its subfolders) include/exclude a given text string

Usage

WhichFile(String, Folder, fixed = TRUE, DoesExist = TRUE)

Arguments

String

The text string or regular expression being sought.

Folder

The head folder to start searching in.

fixed

Fixed text string or if FALSE, a regular expression that will be passed to grep().

DoesExist

If TRUE, it shows the files that do include the text string of interest; if FALSE, files that lack the search string are returned.

Details

Finding a given search string in a pile of text files is time-consuming. Finding which files lack that search string is even harder.

Value

A vector of filenames returned as character strings.

Author

A. Jonathan R. Godfrey in response to a request from CRAN to add missing text to help documentation.

Note

This search uses readLines() which throws plenty of warnings if the files being searched across do not all end in a blank line.