Add minor GHA improvements

See docker-library/bashbrew#77

.github/workflows/ci.yml

@@ -3,13 +3,18 @@ name: GitHub CI
 on:
  pull_request:
  push:
+ workflow_dispatch:
  schedule:
  - cron: 0 0 * * 0
 
 defaults:
  run:
  shell: 'bash -Eeuo pipefail -x {0}'
 
+concurrency:
+ group: ${{ github.ref }}
+ cancel-in-progress: true
+
 jobs:
 
  generate-jobs:
@@ -24,10 +29,15 @@ jobs:
  name: Generate Jobs
  run: |
  strategy="$("$BASHBREW_SCRIPTS/github-actions/generate.sh")"
+
  strategy="$("$BASHBREW_SCRIPTS/github-actions/munge-i386.sh" -c <<<"$strategy")"
+
  strategy="$(jq -c '.matrix.include |= [ .[] | select(.name | (test("i386") | not) or test("alpine")) ]' <<<"$strategy")" # Ubuntu no longer supports i386 (so we can only build test Alpine there; qemu-user-static is too slow for other arches)
- echo "strategy=$strategy" >> "$GITHUB_OUTPUT"
- jq . <<<"$strategy" # sanity check / debugging aid
+
+ EOF="EOF-$RANDOM-$RANDOM-$RANDOM"
+ echo "strategy<<$EOF" >> "$GITHUB_OUTPUT"
+ jq <<<"$strategy" . | tee -a "$GITHUB_OUTPUT"
+ echo "$EOF" >> "$GITHUB_OUTPUT"
 
  test:
  needs: generate-jobs