Double substitution on Github Action - Nested substitution #26419

juancarlosjr97 · 2020-10-31T23:54:26Z

juancarlosjr97
Oct 31, 2020

I have a problem with a double substitution on a GitHub Action. I have a secret named: MASTER_ENVIRONMENT_NAME and STAGING_ENVIRONMENT_NAME

On GitHub actions, I am trying to use the value of the env variable depending on the branch like this:

BRANCH_NAME=${GITHUB_REF##*/}
DEPLOYMENT=secrets.${BRANCH_NAME^^}_ENVIRONMENT_NAME
echo ${{ secrets.${BRANCH_NAME^^}_ENVIRONMENT_NAME }} // Failing here

I have tried multiple combinations but all failing, any thought?

Answered by juancarlosjr97

Nov 1, 2020

Hi @Simran-B thank you for your reply.

Actually, I found the solution not that long ago doing the following:

- name: Set Branch Credentials
  run: |
    BRANCH_NAME=${GITHUB_REF##*/}
    BRANCH_NAME=${BRANCH_NAME^^}
    echo "BRANCH_ENVIRONMENT_NAME=${BRANCH_NAME}_ENVIRONMENT_NAME" >> $GITHUB_ENV

name: Deploy run: echo ${{ secrets[env.BRANCH_ENVIRONMENT_NAME] }}

Thank you very much!

View full answer

Simran-B · 2020-11-01T14:01:39Z

Simran-B
Nov 1, 2020

Maybe like this:

- name: Determine branch name
  id: branch-name
  run: |
    BRANCH_NAME="${GITHUB_REF##*/}"
    echo "::set-output name=upper::${BRANCH_NAME^^}"
- name: Pick secret dynamically
  run: |
    echo "secrets.${{ steps.branch-name.outputs.upper }}_ENVIRONMENT_NAME:"
    echo "${{ secrets[format('{0}_ENVIRONMENT_NAME', steps.branch-name.outputs.upper)] }}"

0 replies

juancarlosjr97 · 2020-11-01T14:14:51Z

juancarlosjr97
Nov 1, 2020
Author

Hi @Simran-B thank you for your reply.

Actually, I found the solution not that long ago doing the following:

- name: Set Branch Credentials
  run: |
    BRANCH_NAME=${GITHUB_REF##*/}
    BRANCH_NAME=${BRANCH_NAME^^}
    echo "BRANCH_ENVIRONMENT_NAME=${BRANCH_NAME}_ENVIRONMENT_NAME" >> $GITHUB_ENV

name: Deploy

run: echo ${{ secrets[env.BRANCH_ENVIRONMENT_NAME] }}

Thank you very much!

0 replies

Simran-B · 2020-11-01T14:19:19Z

Simran-B
Nov 1, 2020

Cool, I think yours is easier to parse.

BTW. Is there a way to combine ${NAME##...} and ${NAME^^} in bash?

//edit: Bash doesn’t seem to support nesting

stackoverflow.com

Bash Nested Substring Removal (Extraction)?

string, bash, substring

asked by Chris on 07:52PM - 24 Jan 18 UTC

0 replies

juancarlosjr97 · 2020-11-01T14:37:31Z

juancarlosjr97
Nov 1, 2020
Author

I am not sure if it is possible to combine ${NAME##...} and ${NAME^^}

However, it is possible to do this

TEST="part-1/part-2/part-needed"
echo ${TEST##*/} | tr [a-z] [A-Z] // PART-NEEDED

Thank you :slight_smile:

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Double substitution on Github Action - Nested substitution #26419

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Double substitution on Github Action - Nested substitution #26419

juancarlosjr97 Oct 31, 2020

Replies: 4 comments

Simran-B Nov 1, 2020

juancarlosjr97 Nov 1, 2020 Author

Simran-B Nov 1, 2020

Bash Nested Substring Removal (Extraction)?

juancarlosjr97 Nov 1, 2020 Author

juancarlosjr97
Oct 31, 2020

Simran-B
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juancarlosjr97
Nov 1, 2020
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Simran-B
Nov 1, 2020

juancarlosjr97
Nov 1, 2020
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