How to add REGEX in a string inside a shell script?

Question

The following command detects if any of the staged files in git is myFile.js:

echo $(git diff --cached --name-only --diff-filter=ACM | egrep 'path/to/myFile.jsx?$')

But I want to detect any .js file in that folder. I tried this but it didn't work:

echo $(git diff --cached --name-only --diff-filter=ACM | egrep 'path/to/{*}.jsx?$')

How to add a wild card for the filename here?

You should almost never use echo $(somecommand) -- the echo and the $( ) mostly cancel each other out, except for some potential parsing weirdnesses in between them. Just run the command directly (unless you want those parsing weirdnesses for some reason). — Gordon Davisson
– Gordon Davisson, Commented Jun 25, 2020 at 21:41
thanks, I was just echoing for debugging purposes, in the actual code the whole part after the echo is set as a var @GordonDavisson — user967451
– user967451, Commented Jun 25, 2020 at 22:57

anubhava · Accepted Answer · 2020-06-25 20:59:19Z

1

Replace:

egrep 'path/to/{*}.jsx?$'

with:

egrep 'path/to/.+\.jsx?$'

answered Jun 25, 2020 at 20:59

anubhava

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