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special characters in prompts need to be escaped before being used in a regex. #98

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jimhester opened this issue Sep 15, 2017 · 0 comments
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@jimhester jimhester commented Sep 15, 2017

I just changed my prompt to be a blue > with

getOption("prompt")
#> [1] "\033[34m> \033[39m"

Which now gives the following output when you try to use reprex

reprex::reprex(input = "x <- 1\n")
Error in grepl(regex, x) :
  invalid regular expression '^> ', reason 'Missing ']''

This is because

reprex/R/ensure.R

Lines 25 to 26 in 04fcbbc

regex <- paste0("^", prompt)
prompts <- grepl(regex, x)

Does not escape the prompt for special regex characters before passing it to grepl().

Will have a PR to fix this shortly.

jimhester added a commit to jimhester/reprex that referenced this issue Sep 15, 2017
Doing so ensures prompts which contain special characters in regular
expressions do not cause errors or unintended regular expressions.

Fixes tidyverse#98
@jennybc jennybc closed this in #99 Sep 15, 2017
jennybc added a commit that referenced this issue Sep 15, 2017
Doing so ensures prompts which contain special characters in regular
expressions do not cause errors or unintended regular expressions.

Fixes #98
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