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In GitLab CI script I wanted to

  1. Remove any character other then numbers and dot (.) and
  2. remove all the text after 2nd dot [Ex 5.6.7.8 -> 5.6] if dot exists in text.

So for that I have tried to use sed , but it's not working in GitLab Script (working on bash shell locally)

export BRANCH_NAME={$CI_COMMIT_REF_NAME} | sed 's/\.[^.]*$//'  | sed 's/[^0-9.]//g'

any idea what is missing here ?

If sed is not going to work here then any other option to achieve the same?

Edit : As per @WiktorStribiżew - echo "$CI_COMMIT_REF_NAME" | sed 's/.[^.]$//' | sed 's/[^0-9.]//g' - export BRANCH_NAME=${CI_COMMIT_REF_NAME} | sed 's/.[^.]$//' | sed 's/[^0-9.]//g'

echo is working but export is not

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  • 2
    Does echo "$CI_COMMIT_REF_NAME" | sed 's/\.[^.]*$//' | sed 's/[^0-9.]//g' work? Also, you probably meant ${CI_COMMIT_REF_NAME}, not {$CI_COMMIT_REF_NAME} Commented Jan 11, 2022 at 21:27
  • I go with @WiktorStribiżew - i can also clarify that there is no reason sed should not work in gitlab pipelines (unless it is not installed on the underlying system) Commented Jan 11, 2022 at 21:34
  • @WiktorStribiżew echo "$CI_COMMIT_REF_NAME" | sed 's/\.[^.]*$//' | sed 's/[^0-9.]//g' is working but -export BRANCH_NAME=${CI_COMMIT_REF_NAME} | sed 's/\.[^.]*$//' | sed 's/[^0-9.]//g' is not working !!! Commented Jan 11, 2022 at 21:58
  • 1
    Yeah, just wrap with $(...). See my full answer. Commented Jan 11, 2022 at 21:59

2 Answers 2

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Using sed

$ export BRANCH_NAME=$(echo "$CI_COMMIT_REF_NAME" |sed 's/[A-Za-z]*//g;s/\([0-9]*\.[0-9]*\)\.[^ ]*/\1/g')
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2 Comments

I think you used sed 's/[A-Za-z]*//g to remove Ex, right? I think it was just a shortened word "example", the string OP just wanted to share was 5.6.7.8.
@WiktorStribiżew Indeed. Thanks for pointing that out.
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First of all, to remove all text after and including second dot you need

sed 's/\([^.]*\.[^.]*\).*/\1/'

The sed 's/\.[^.]*$//' sed command removes the last dot and any text after it.

Next, you must have made a typo and you actually meant to write ${CI_COMMIT_REF_NAME} and not {$CI_COMMIT_REF_NAME}.

So, you might be better off with

export BRANCH_NAME=$(echo "$CI_COMMIT_REF_NAME" | sed 's/\([^.]*\.[^.]*\).*/\1/' | sed 's/[^0-9.]//g')
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