fix: tool: disinto backup create — export Forgejo issues + disinto-ops git bundle (#1057)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/backup.sh

@@ -0,0 +1,131 @@
+#!/usr/bin/env bash
+# =============================================================================
+# disinto backup — export factory state for migration
+#
+# Usage: source this file, then call backup_create <outfile.tar.gz>
+# Requires: FORGE_URL, FORGE_TOKEN, FORGE_REPO, FORGE_OPS_REPO, OPS_REPO_ROOT
+# =============================================================================
+set -euo pipefail
+
+# Fetch all issues (open + closed) for a repo slug and emit the normalized JSON array.
+# Usage: _backup_fetch_issues <org/repo>
+_backup_fetch_issues() {
+  local repo_slug="$1"
+  local api_url="${FORGE_API_BASE}/repos/${repo_slug}"
+
+  local all_issues="[]"
+  for state in open closed; do
+    local page=1
+    while true; do
+      local page_items
+      page_items=$(curl -sf -X GET \
+        -H "Authorization: token ${FORGE_TOKEN}" \
+        -H "Content-Type: application/json" \
+        "${api_url}/issues?state=${state}&type=issues&limit=50&page=${page}") || {
+        echo "ERROR: failed to fetch ${state} issues from ${repo_slug} (page ${page})" >&2
+        return 1
+      }
+      local count
+      count=$(printf '%s' "$page_items" | jq 'length' 2>/dev/null) || count=0
+      [ -z "$count" ] && count=0
+      [ "$count" -eq 0 ] && break
+      all_issues=$(printf '%s\n%s' "$all_issues" "$page_items" | jq -s 'add')
+      [ "$count" -lt 50 ] && break
+      page=$((page + 1))
+    done
+  done
+
+  # Normalize to the schema: number, title, body, labels, state
+  printf '%s' "$all_issues" | jq '[.[] | {
+    number: .number,
+    title: .title,
+    body: .body,
+    labels: [.labels[]?.name],
+    state: .state
+  }] | sort_by(.number)'
+}
+
+# Create a backup tarball of factory state.
+# Usage: backup_create <outfile.tar.gz>
+backup_create() {
+  local outfile="${1:-}"
+  if [ -z "$outfile" ]; then
+    echo "Error: output file required" >&2
+    echo "Usage: disinto backup create <outfile.tar.gz>" >&2
+    return 1
+  fi
+
+  # Resolve to absolute path before cd-ing into tmpdir
+  case "$outfile" in
+    /*) ;;
+    *) outfile="$(pwd)/${outfile}" ;;
+  esac
+
+  # Validate required env
+  : "${FORGE_URL:?FORGE_URL must be set}"
+  : "${FORGE_TOKEN:?FORGE_TOKEN must be set}"
+  : "${FORGE_REPO:?FORGE_REPO must be set}"
+
+  local forge_ops_repo="${FORGE_OPS_REPO:-${FORGE_REPO}-ops}"
+  local ops_repo_root="${OPS_REPO_ROOT:-}"
+
+  if [ -z "$ops_repo_root" ] || [ ! -d "$ops_repo_root/.git" ]; then
+    echo "Error: OPS_REPO_ROOT (${ops_repo_root:-<unset>}) is not a valid git repo" >&2
+    return 1
+  fi
+
+  local tmpdir
+  tmpdir=$(mktemp -d)
+  trap 'rm -rf "$tmpdir"' EXIT
+
+  local project_name="${FORGE_REPO##*/}"
+
+  echo "=== disinto backup create ==="
+  echo "Forge: ${FORGE_URL}"
+  echo "Repos: ${FORGE_REPO}, ${forge_ops_repo}"
+
+  # ── 1. Export issues ──────────────────────────────────────────────────────
+  mkdir -p "${tmpdir}/issues"
+
+  echo "Fetching issues for ${FORGE_REPO}..."
+  _backup_fetch_issues "$FORGE_REPO" > "${tmpdir}/issues/${project_name}.json"
+  local main_count
+  main_count=$(jq 'length' "${tmpdir}/issues/${project_name}.json")
+  echo "  ${main_count} issues exported"
+
+  echo "Fetching issues for ${forge_ops_repo}..."
+  _backup_fetch_issues "$forge_ops_repo" > "${tmpdir}/issues/${project_name}-ops.json"
+  local ops_count
+  ops_count=$(jq 'length' "${tmpdir}/issues/${project_name}-ops.json")
+  echo "  ${ops_count} issues exported"
+
+  # ── 2. Git bundle of ops repo ────────────────────────────────────────────
+  mkdir -p "${tmpdir}/repos"
+
+  echo "Creating git bundle for ${forge_ops_repo}..."
+  git -C "$ops_repo_root" bundle create "${tmpdir}/repos/${project_name}-ops.bundle" --all 2>&1
+  echo "  bundle created ($(du -h "${tmpdir}/repos/${project_name}-ops.bundle" | cut -f1))"
+
+  # ── 3. Metadata ──────────────────────────────────────────────────────────
+  local created_at
+  created_at=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+  jq -n \
+    --arg created_at "$created_at" \
+    --arg source_host "$(hostname)" \
+    --argjson schema_version 1 \
+    --arg forgejo_url "$FORGE_URL" \
+    '{
+      created_at: $created_at,
+      source_host: $source_host,
+      schema_version: $schema_version,
+      forgejo_url: $forgejo_url
+    }' > "${tmpdir}/metadata.json"
+
+  # ── 4. Pack tarball ──────────────────────────────────────────────────────
+  echo "Creating tarball: ${outfile}"
+  tar -czf "$outfile" -C "$tmpdir" metadata.json issues repos
+  local size
+  size=$(du -h "$outfile" | cut -f1)
+  echo "=== Backup complete: ${outfile} (${size}) ==="
+}