This snippet contains the steps to generate a terraform plan and post it as a comment of a pull request in Azure DevOps

AzDO-Terraform-Plan-PR.yaml

- script: |
    terraform plan -out tf.tfplan
  displayName: Generate Terraform plan

- script: |
    terraform show -no-color tf.tfplan > $(Agent.TempDirectory)/tf.txt
  displayName: Convert Terraform plan to text

- bash: |
    cd $(Agent.TempDirectory)
    ENCODED_URL=$(echo "$(System.CollectionUri)$(System.TeamProject)/_apis/git/repositories/${{ variables.SourceRepositoryName }}/pullRequests/$(System.PullRequest.PullRequestId)/threads?api-version=7.0" | sed 's/ /%20/g')
    jq --rawfile comment tf.txt '.comments[0].content=$comment' <<< '{"comments": [{"parentCommentId": 0,"content": "","commentType": 1}],"status": 1}' |
    curl --request POST "$ENCODED_URL" \
    --header "Content-Type: application/json" \
    --header "Accept: application/json" \
    --header "Authorization: Bearer $SYSTEM_ACCESSTOKEN" \
    --data @- \
    --verbose
  env:
    SYSTEM_ACCESSTOKEN: $(System.AccessToken)
  displayName: 'Post comment with Terraform Plan'