Narrow Gitea Actions deploy guardrail

.gitea/workflows/homelab-main.yml

@@ -147,7 +147,7 @@ jobs:
             tofu -chdir="${stack}" validate
           done
 
-      - name: Block automatic deploy for high-impact changes
+      - name: Block automatic deploy for Raspberry Pi Gitea changes
         run: |
           set -euo pipefail
 
@@ -156,14 +156,92 @@ jobs:
           )"
 
           if [[ -n "${event_before}" && ! "${event_before}" =~ ^0+$ ]]; then
-            changed_files="$(git diff --name-only "${event_before}" HEAD)"
+            base_ref="${event_before}"
           else
-            changed_files="$(git diff-tree --no-commit-id --name-only -r HEAD)"
+            base_ref="$(git rev-parse HEAD^ 2>/dev/null || git hash-object -t tree /dev/null)"
           fi
+          changed_files="$(git diff --name-only "${base_ref}" HEAD)"
           printf '%s\n' "${changed_files}"
 
-          if printf '%s\n' "${changed_files}" | grep -Eq '^(bootstrap/(provisioning|cluster|platform|edge)/|infra/gitea/|lab[.]sh|[.]gitea/workflows/)'; then
-            echo "High-impact bootstrap, runner, or workflow changes require a manual Debian run."
+          blocked_files="$(printf '%s\n' "${changed_files}" | grep -E '^infra/gitea/' || true)"
+          if printf '%s\n' "${changed_files}" | grep -qx 'lab.sh' &&
+            python3 - "${base_ref}" <<'PY'
+          import re
+          import subprocess
+          import sys
+
+          base_ref = sys.argv[1]
+          path = "lab.sh"
+          target_functions = {
+              "deploy_gitea",
+              "install_gitea_backup_timer",
+              "backup_gitea",
+              "drill_gitea_restore",
+          }
+
+
+          def function_ranges(content):
+              starts = []
+              for index, line in enumerate(content.splitlines(), 1):
+                  match = re.match(r"^([A-Za-z_][A-Za-z0-9_]*)\(\) \{", line)
+                  if match:
+                      starts.append((index, match.group(1)))
+
+              ranges = []
+              for offset, (start, name) in enumerate(starts):
+                  end = starts[offset + 1][0] - 1 if offset + 1 < len(starts) else len(content.splitlines())
+                  if name in target_functions:
+                      ranges.append((start, end))
+              return ranges
+
+
+          current_ranges = function_ranges(open(path, encoding="utf-8").read())
+          try:
+              base_content = subprocess.check_output(
+                  ["git", "show", f"{base_ref}:{path}"],
+                  stderr=subprocess.DEVNULL,
+                  text=True,
+              )
+          except subprocess.CalledProcessError:
+              base_ranges = []
+          else:
+              base_ranges = function_ranges(base_content)
+
+          diff = subprocess.check_output(
+              ["git", "diff", "--unified=0", base_ref, "HEAD", "--", path],
+              text=True,
+          )
+
+
+          def overlaps(start, length, ranges):
+              if length == 0:
+                  end = start
+              else:
+                  end = start + length - 1
+              return any(start <= range_end and end >= range_start for range_start, range_end in ranges)
+
+
+          for line in diff.splitlines():
+              match = re.match(r"^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@", line)
+              if not match:
+                  continue
+              old_start = int(match.group(1))
+              old_length = int(match.group(2) or "1")
+              new_start = int(match.group(3))
+              new_length = int(match.group(4) or "1")
+              if overlaps(old_start, old_length, base_ranges) or overlaps(new_start, new_length, current_ranges):
+                  sys.exit(0)
+
+          sys.exit(1)
+          PY
+          then
+            blocked_files="${blocked_files}"$'\n'"lab.sh"
+          fi
+          blocked_files="$(printf '%s\n' "${blocked_files}" | sed '/^$/d' | sort -u)"
+
+          if [[ -n "${blocked_files}" ]]; then
+            printf '%s\n' "${blocked_files}"
+            echo "Raspberry Pi Gitea service changes require a manual Debian run."
             exit 1
           fi
 

README.md

@@ -407,12 +407,11 @@ This repo includes a Gitea Actions workflow at
 a repository-scoped Debian host runner with the label `homelab-debian`.
 
 The workflow validates shell syntax, Kubernetes manifests, and all OpenTofu
-stacks before deployment. It automatically stops when high-impact files under
-`bootstrap/provisioning`, `bootstrap/cluster`, `bootstrap/platform`,
-`bootstrap/edge`, `infra/gitea`, `lab.sh`, or `.gitea/workflows` change; those
-changes still require a manual Debian run. Lower-risk app changes proceed to
-`./lab.sh apps` after validation passes, which skips Gitea, Pimox, cluster,
-platform, and edge changes.
+stacks before deployment. Automatic deploy is blocked only for Raspberry Pi
+Gitea service changes: files under `infra/gitea/`, or edits inside the
+`deploy_gitea`, `install_gitea_backup_timer`, `backup_gitea`, or
+`drill_gitea_restore` functions in `lab.sh`. Other changes proceed to
+`./lab.sh apps` after validation passes.
 
 `./lab.sh bootstrap-gitea-repo` also registers the Debian host SSH public key
 with the Gitea repository and switches the Debian working copy's `gitea` remote