GITHUB ACTION string chars from string

Question

I have set an env variable called BRANCH and in there I have "release/v4.1.2". I'm on ubuntu and I want to update that env variable to just be left with "v4.1.2". I am totally stuck. Nothing I try works.

something like this?

run:|
BRANCH="${BRANCH//[^0-9]/}"

Answer 1

You could use the Bash Shell Parameter Expansion feature, like:

>echo "${BRANCH#"release/"}"
v4.1.2

so you can combine it in your action like:

run:|
release="${BRANCH#"release/"}"
echo "BRANCH=${release}" >> $GITHUB_ENV

By setting an env variable, like described here