ci: replace bash in workflow by subcommand

.github/workflows/bot.yml

@@ -42,46 +42,12 @@ jobs:
       pr-numbers: ${{ steps.pr-numbers.outputs.pr-numbers }}
 
     steps:
-      - name: Parse event inputs
+      - name: Generate matrix from event
         id: pr-numbers
+        working-directory: contribs/github-bot
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          # Triggered by a workflow dispatch event
-          if [ '${{ github.event_name }}' = 'workflow_dispatch' ]; then
-
-            # If the input is 'all', create a matrix with every open PRs
-            if [ '${{ inputs.pull-request-list }}' = 'all' ]; then
-              pr_list=`gh pr list --state 'open' --repo '${{ github.repository }}' --json 'number' --template '{{$first := true}}{{range .}}{{if $first}}{{$first = false}}{{else}}, {{end}}{{"\""}}{{.number}}{{"\""}}{{end}}'`
-              [ -z "$pr_list" ] && echo 'Error: no opened PR found' >&2 && exit 1
-              echo "pr-numbers=[$pr_list]" >> "$GITHUB_OUTPUT"
-
-            # If the input is not 'all', test for each number in the comma separated
-            # list if the associated PR is opened, then add it to the matrix
-            else
-              pr_list_raw='${{ inputs.pull-request-list }}'
-              pr_list=''
-              IFS=','
-              for number in $pr_list; do
-                trimed=`echo "$number" | xargs`
-                pr_state=`gh pr view "$trimed" --repo '${{ github.repository }}' --json 'state' --template '{{.state}}' 2> /dev/null`
-                [ "$pr_state" != 'OPEN' ] && echo "Error: PR with number <$trimed> is not opened" >&2 && exit 1
-              done
-              echo "pr-numbers=[$pr_list]" >> "$GITHUB_OUTPUT"
-            fi
-
-          # Triggered by comment event, just add the associated PR number to the matrix
-          elif [ '${{ github.event_name }}' = 'issue_comment' ]; then
-            echo 'pr-numbers=["${{ github.event.issue.number }}"]' >> "$GITHUB_OUTPUT"
-
-          # Triggered by pull request target event, just add the associated PR number to the matrix
-          elif [ '${{ github.event_name }}' = 'pull_request_target' ]; then
-            echo 'pr-numbers=["${{ github.event.pull_request.number }}"]' >> "$GITHUB_OUTPUT"
-
-          # Should never happen
-          else
-            echo 'Error: unknown event ${{ github.event_name }}' >&2 && exit 1
-          fi
+        run: go run . matrix >> "$GITHUB_OUTPUT"
 
   # This job processes each pull request in the matrix individually while ensuring
   # that a same PR cannot be processed concurrently by mutliple runners