如何搜索字符串中第一次出现的“：/”，然后搜索找到的子字符串中所有其他出现的内容，包括“：/”？

Question

A little explanation:

I have a string like (from a commandline programm execution kpsewhich -all etex.src ):

c:/texlive/2019/texmf-dist/tex/luatex/hyph-utf8/etex.srcc:/texlive/2019/texmf-dist/tex/plain/etex/etex.src

This string consists of 2 or more concatenated file paths, which are to be separated again.

Dynamic search pattern: c:/

The files are always on the same volume, here c , but the volume name has to be determined.

Is it possible to do something like this with an RegExp?

I could split the string according to the actual filename etex.src , but is the other approach possible?

Update:

The RegExp as follows

(.+?:[\/\\]+)(?:(?!\1).)* 

meets my requirements even better. How to disassemble a string with CaptureGroup?

Answer 1

I'm guessing that maybe this expression would be somewhat close to what you might want to design:

c:\/.*?(?=c:\/|$)

DEMO

Answer 2

I'm not entirely sure what you want this RegExp to retrieve but if you want to get the array of file paths then you can do it with /(?<!^)[^:]+/g regex:

// in node.js
const str = 'c:/texlive/2019/texmf-dist/tex/luatex/hyph-utf8/etex.srcc:/texlive/2019/texmf-dist/tex/plain/etex/etex.src'
const paths = str.match(/(?<!^)[^:]+/g)
// [
//   "/texlive/2019/texmf-dist/tex/luatex/hyph-utf8/etex.srcc",
//   "/texlive/2019/texmf-dist/tex/plain/etex/etex.src"
// ]

This RegExp searches for a sequence of symbols which don't include : and which don't start at the beginning of the string (this excludes c volume or any other volume name)