name: Validate suspect image

# Manual-only forensic comparison of a third-party deepseek-harness image
# already present on the runner host's docker daemon against the trusted image
# built by this repository. The suspect image is NEVER executed: `docker
# create` only materializes a container's filesystem, and every inspection
# happens on exported tar content.

on:
  workflow_dispatch:
    inputs:
      suspect:
        description: Suspect image reference (must already be present locally)
        default: runzhliu/deepseek-harness:0.1.1-rc.2
      trusted:
        description: Trusted image reference
        default: gitea.milesward.dev/mward4/deepseek-harness:latest

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Locate suspect image (never pulled, never run)
        run: |
          set -eu
          SUSPECT="${{ inputs.suspect || 'runzhliu/deepseek-harness:0.1.1-rc.2' }}"
          if ! docker image inspect "$SUSPECT" > /tmp/suspect-inspect.json 2>/dev/null; then
            echo "::error::suspect image $SUSPECT is not present on this daemon"
            docker images | grep -i deepseek || true
            exit 1
          fi
          echo "== suspect config (entrypoint/cmd/env/user) =="
          docker image inspect --format \
            'Entrypoint={{json .Config.Entrypoint}} Cmd={{json .Config.Cmd}} User={{json .Config.User}} Env={{json .Config.Env}} Labels={{json .Config.Labels}}' \
            "$SUSPECT"
          echo "== suspect digests =="
          docker image inspect --format '{{json .RepoDigests}} id={{.Id}}' "$SUSPECT"
          echo "== containers using the suspect image on this host =="
          docker ps -a --filter "ancestor=$SUSPECT" --format '{{.ID}} {{.Names}} {{.Status}} {{.Ports}}' || true

      - name: Export both filesystems
        run: |
          set -eu
          SUSPECT="${{ inputs.suspect || 'runzhliu/deepseek-harness:0.1.1-rc.2' }}"
          TRUSTED="${{ inputs.trusted || 'gitea.milesward.dev/mward4/deepseek-harness:latest' }}"
          docker pull -q "$TRUSTED"
          mkdir -p /tmp/suspect /tmp/trusted
          s=$(docker create "$SUSPECT")
          t=$(docker create "$TRUSTED")
          docker export "$s" | tar -x -C /tmp/suspect
          docker export "$t" | tar -x -C /tmp/trusted
          docker rm "$s" "$t" > /dev/null

      - name: Compare installed dsh package against trusted build
        run: |
          set -eu
          echo "== dsh install locations in suspect =="
          find /tmp/suspect -maxdepth 6 -type d -name dsh -path '*@deepseek-ai*' | tee /tmp/suspect-dsh-dirs
          SDIR=$(head -1 /tmp/suspect-dsh-dirs || true)
          TDIR=/tmp/trusted/usr/local/lib/node_modules/@deepseek-ai/dsh
          if [ -z "${SDIR}" ]; then
            echo "::warning::no @deepseek-ai/dsh install found in suspect image"
          else
            echo "== package.json versions =="
            grep -E '"(name|version)"' "$SDIR/package.json" "$TDIR/package.json" | head -8
            echo "== dsh's OWN code (node_modules excluded) =="
            if diff -r --exclude=node_modules "$SDIR" "$TDIR" > /tmp/dsh-own-diff.txt 2>&1; then
              echo "IDENTICAL: suspect's dsh code matches the official npm release byte-for-byte"
            else
              echo "DSH CODE DIFFERENCES FOUND:"
              cat /tmp/dsh-own-diff.txt
            fi
            echo "== dependency tree (node_modules) summary =="
            if diff -r "$SDIR/node_modules" "$TDIR/node_modules" > /tmp/dsh-dep-diff.txt 2>&1; then
              echo "dependencies identical"
            else
              echo "$(grep -c '^diff -r\|^Only in' /tmp/dsh-dep-diff.txt) differing/unique dependency files"
              echo "-- packages with version changes --"
              grep -A0 'package.json$' /tmp/dsh-dep-diff.txt | sed 's|.*node_modules/||; s|/package.json.*||' | sort -u | head -30
            fi
          fi

      - name: Scan suspect for tampering red flags
        run: |
          set -eu
          cd /tmp/suspect
          echo "== world-reachable startup hooks =="
          ls -la etc/cron* etc/init.d 2>/dev/null || true
          find . -maxdepth 3 -name "*.sh" -newer usr/local 2>/dev/null | head || true
          echo "== 0.0.0.0 safety check still present? =="
          grep -rl "intentionally not supported yet for safety" \
            usr/local/lib/node_modules 2>/dev/null \
            && echo "OK: upstream 0.0.0.0 refusal intact" \
            || echo "SUSPICIOUS: upstream 0.0.0.0 safety refusal NOT found (patched out?)"
          echo "== network callouts baked into image config =="
          grep -rEo "https?://[a-zA-Z0-9./_-]+" usr/local/lib/node_modules/@deepseek-ai/dsh/package.json 2>/dev/null | sort -u | head
          echo "== extra npm packages not in trusted image =="
          (cd /tmp/suspect && find usr -maxdepth 5 -type d -path '*node_modules/*' ! -path '*node_modules/*/node_modules*' 2>/dev/null | sort) > /tmp/s.pkgs || true
          (cd /tmp/trusted && find usr -maxdepth 5 -type d -path '*node_modules/*' ! -path '*node_modules/*/node_modules*' 2>/dev/null | sort) > /tmp/t.pkgs || true
          diff /tmp/s.pkgs /tmp/t.pkgs | head -40 || true