find_code: Find scripts containing specific code
In DavidBarke/QWUtils: Useful Methods For Programming with Shiny

Find all the R scripts in a directory that contain some code as defined in pattern. This is especially useful when functions are redesigned and have to be adjusted in all scripts where they are used.

1 2	find_code(directory, pattern, recursive = TRUE, count = FALSE, indices = NULL, ending = ".[.](r\|R\|s\|S\|q)([.](lnk\|LNK))$")

`directory`	A path to the directory containing the R scripts.
`pattern`	Pattern to look for. The default interpretation is a regular expression, as described in stringi::stringi-search-regex. Control options with `regex()`. Match a fixed string (i.e. by comparing only bytes), using `fixed()`. This is fast, but approximate. Generally, for matching human text, you'll want `coll()` which respects character matching rules for the specified locale. Match character, word, line and sentence boundaries with `boundary()`. An empty pattern, "", is equivalent to `boundary("character")`.
`recursive`	If `TRUE`, subdirectories are recursively searched for R scripts.
`count`	If `TRUE`, a vector with the number of occurences per script is returned. If `FALSE`, a `character` vector with the scripts containing at least one occurence is returned.
`indices`	`Integer` vector specifying the indices of lines to be searched in each script. This is useful, if you get an Shiny error indicating the line in which the error occured, but not the script. If `NULL` all lines of each script get searched.