# Daily audit for GHCR container packages that are unlinked from a source
# repository (`repository: null` on the GHCR API).
#
# WHY THIS EXISTS
# ---------------
# When a GHCR container package is not linked to a repository, workflow
# builds in `CopilotKit/CopilotKit` get `403 Forbidden` on push to GHCR —
# the workflow's `GITHUB_TOKEN` only has package-write permissions when
# the package is linked to the actor's repo. We hit this twice in quick
# succession (`showcase-harness` caught manually after a failed deploy, and
# `showcase-pocketbase` caught by a preemptive scan). There is NO GitHub
# API to programmatically link a package to a repo — it is UI-only — so
# the only way to prevent future surprises is detect drift early via a
# scheduled audit + Slack alert.
#
# ALLOWLIST (VERIFIED_ACCESS)
# ---------------------------
# Some packages show `repository: null` on the API but have working
# Actions access because the "Manage Actions access" setting was
# configured manually in the GitHub UI. There is NO API to detect this
# setting, so we maintain an explicit allowlist of package names that
# have been verified to have Actions write access. These are excluded
# from the unlinked-package alert to avoid false positives. See the
# VERIFIED_ACCESS array in the audit step below.
#
# This workflow is the operationalization of the lesson captured in
# `feedback_ghcr_new_package_403.md`.
#
# REQUIRED SECRETS
# ----------------
# - ORG_READ_PACKAGES_PAT: a fine-grained PAT with `read:packages` scope,
#   org-scoped to `CopilotKit`. The default `secrets.GITHUB_TOKEN` does
#   NOT have `read:packages` for the org and cannot list org packages.
# - SLACK_WEBHOOK_GHCR_DRIFT: a CopilotKit-internal Slack incoming-webhook
#   URL. Posts to whichever channel the webhook is bound to (intended:
#   an internal alerts channel).
#
# If `ORG_READ_PACKAGES_PAT` is unset the workflow fails loudly — drift
# detection silently disabled is worse than no workflow at all.
# If `SLACK_WEBHOOK_GHCR_DRIFT` is unset the workflow logs a warning
# (the audit still runs) so a missing webhook does not mask drift.
#
# EXIT CODES
# ----------
# This workflow exits 0 in all non-error cases (including when drift is
# present). The Slack message IS the alert; failing the workflow on
# drift would create noisy red CI checks on a schedule.

name: GHCR unlinked-package audit

on:
  schedule:
    # Daily at 14:00 UTC (07:00 PT / 10:00 ET) — low-traffic window,
    # well before the US workday's deploy activity.
    - cron: "0 14 * * *"
  workflow_dispatch: {}

permissions:
  contents: read

jobs:
  audit:
    name: Audit org container packages for unlinked repos
    # Hoist the Slack webhook into an env var so step-level `if:`
    # expressions can reference it — `secrets.*` is not a valid
    # named-value inside `if:` and causes a workflow startup failure.
    env:
      SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_GHCR_DRIFT }}
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - name: Verify ORG_READ_PACKAGES_PAT is set
        env:
          PAT: ${{ secrets.ORG_READ_PACKAGES_PAT }}
        run: |
          if [ -z "$PAT" ]; then
            echo "::error::ORG_READ_PACKAGES_PAT is not set. This workflow requires a fine-grained PAT with read:packages scope, org-scoped to CopilotKit. See the workflow header comment in .github/workflows/ghcr_unlinked_packages.yml for setup."
            exit 1
          fi
          echo "ORG_READ_PACKAGES_PAT present."

      - name: List org container packages and identify unlinked
        id: audit
        env:
          GH_TOKEN: ${{ secrets.ORG_READ_PACKAGES_PAT }}
        run: |
          set -euo pipefail

          # Page through all container packages in the CopilotKit org.
          # `--paginate` follows Link headers; per_page=100 minimizes
          # request count. `gh api` returns one JSON array per page;
          # `--slurp` is unnecessary because gh concatenates pages into
          # a single stream when called with `--paginate` on an array
          # endpoint.
          all_packages_json="$(gh api \
            --paginate \
            -H "Accept: application/vnd.github+json" \
            "/orgs/CopilotKit/packages?package_type=container&per_page=100")"

          total="$(echo "$all_packages_json" | jq 'length')"
          echo "Total container packages in CopilotKit org: $total"

          # Filter for packages where repository is null. Emit a compact
          # JSON array of {name, visibility} objects for downstream use.
          unlinked_json="$(echo "$all_packages_json" \
            | jq -c '[.[] | select(.repository == null) | {name: .name, visibility: .visibility}]')"

          # Packages with `repository: null` that have verified Actions access
          # configured via the GitHub UI ("Manage Actions access" → CopilotKit →
          # Write). These are not truly drifted — pushes work fine — but there
          # is no API to detect this, so we maintain an explicit allowlist.
          # To add a package here: verify in the package settings UI that
          # "Manage Actions access" lists CopilotKit with Write role, then
          # add the exact package name to this array.
          VERIFIED_ACCESS=("showcase-pocketbase")

          # Remove allowlisted packages from the unlinked set.
          unlinked_json_before_filter="$unlinked_json"
          if [ ${#VERIFIED_ACCESS[@]} -gt 0 ]; then
            allowlist_filter=$(printf '"%s",' "${VERIFIED_ACCESS[@]}")
            allowlist_filter="[${allowlist_filter%,}]"
            unlinked_json="$(echo "$unlinked_json" \
              | jq -c --argjson allow "$allowlist_filter" \
                '[.[] | select(.name as $n | $allow | index($n) | not)]')"
          fi

          skipped=$(($(echo "$unlinked_json_before_filter" | jq 'length') - $(echo "$unlinked_json" | jq 'length')))
          if [ "$skipped" -gt 0 ]; then
            echo "Skipped $skipped package(s) with verified Actions access (allowlist)."
          fi

          unlinked_count="$(echo "$unlinked_json" | jq 'length')"
          echo "Unlinked container packages: $unlinked_count"

          # Emit outputs for the next step. Use the multiline-output
          # delimiter form for the JSON array so jq output with embedded
          # special chars survives intact.
          {
            echo "unlinked_count=$unlinked_count"
            echo "unlinked_json<<EOF"
            echo "$unlinked_json"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

          if [ "$unlinked_count" = "0" ]; then
            echo "::notice::No GHCR drift — all CopilotKit org container packages are linked to a repository."
          else
            echo "::warning::Detected $unlinked_count unlinked container package(s):"
            echo "$unlinked_json" | jq -r '.[] | "  - \(.name) (\(.visibility))"'
          fi

      - name: Build Slack payload
        id: payload
        if: steps.audit.outputs.unlinked_count != '0'
        env:
          UNLINKED_JSON: ${{ steps.audit.outputs.unlinked_json }}
          UNLINKED_COUNT: ${{ steps.audit.outputs.unlinked_count }}
          RUN_URL: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
        run: |
          set -euo pipefail

          # Build a single `text` field with mrkdwn — keeps the payload
          # compatible with both incoming-webhooks and channel webhooks.
          # Each unlinked package gets a deep link to its Actions-access
          # settings page, where the UI fix lives.
          lines="$(echo "$UNLINKED_JSON" | jq -r '.[] | "• <https://github.com/orgs/CopilotKit/packages/container/\(.name)/settings|\(.name)> (\(.visibility))"')"

          # Build message via printf — avoids heredoc indentation
          # gotchas (closing delimiter must be column-0, which confuses
          # YAML linters on `run: |` blocks). mrkdwn renders *bold*,
          # _italic_, and <url|label> links.
          nl=$'\n'
          message=":warning: *GHCR drift detected* — ${UNLINKED_COUNT} container package(s) in the \`CopilotKit\` org are unlinked from a source repository.${nl}${nl}"
          message="${message}${lines}${nl}${nl}"
          message="${message}*UI fix (per package):* open the settings link above → *Manage Actions access* → *Add Repository* → \`CopilotKit/CopilotKit\` → *Write*.${nl}${nl}"
          message="${message}_This drift breaks future workflow builds with \`403 Forbidden\` on push to GHCR. <${RUN_URL}|View audit run>_"

          # Emit as a multiline output so the next step can consume it
          # without re-quoting through a shell.
          {
            echo "text<<EOF"
            echo "$message"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Notify Slack (drift detected)
        if: steps.audit.outputs.unlinked_count != '0' && env.SLACK_WEBHOOK != ''
        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
        with:
          webhook: ${{ secrets.SLACK_WEBHOOK_GHCR_DRIFT }}
          webhook-type: incoming-webhook
          # Wrap the dynamic message via toJSON so quotes/newlines/
          # backslashes inside package names or visibility values are
          # safely JSON-encoded instead of breaking the payload.
          payload: |
            { "text": ${{ toJSON(steps.payload.outputs.text) }} }

      - name: Log (no Slack — webhook unset)
        if: steps.audit.outputs.unlinked_count != '0' && env.SLACK_WEBHOOK == ''
        run: |
          echo "::warning::Drift detected but SLACK_WEBHOOK_GHCR_DRIFT is not set; no Slack notification sent. See run logs above for the unlinked package list."

      - name: Log (no drift)
        if: steps.audit.outputs.unlinked_count == '0'
        run: |
          echo "No drift — exiting 0."