I am trying to transform the file name (TM_FILENAME_BASE) but remove a key word from the middle of the text

Question

For example I have a file named 'prefix-component.suffix.ts'. I would like the result to be PrefixSuffix with the word 'component' removed. I can make this work by using ${TM_FILENAME_BASE/(.*?)\\bcomponent\\b(.*)/${1:/pascalcase}${2:/pascalcase}/g}. ${1:/pascalcase} is everything before 'component' and ${2:/pascalcase} is everthing after. The problem is not all file names have the word 'component' in them so group 1 and 2 are empty in those cases. Is there a way to do this with 1 ${1:/pascalcase} with 'component' removed if it is present.

Answer 1

Make \bcomponent\b and the suffix collectively optional:

${
  TM_FILENAME_BASE
  /
    ^                             # Match at the start of the string
    (.*?)                         # anything, as few as possible,
    (?:                           # until we see
      (?:\bcomponent\b)           # 'component' as a full word
      (.*)                        # followed by anything,
    )?                            # both of which may or may not collectively present
    $                             # right before the end of the string.
  /
    ${1:/pascalcase}
    ${2:/pascalcase}
  /g
}

Before	Prefix	Suffix	After
prefix-component.suffix	prefix-	.suffix	PrefixSuffix
prefix.suffix	prefix.suffix	Nothing	PrefixSuffix

Try it on regex101.com.