"#"

lib/state.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# lib/state.sh — Sync state management on orphan branch
+#
+# State persists on an orphan git branch (default: josh-sync-state),
+# committed and pushed to origin. Survives CI runner teardown.
+#
+# Storage layout:
+#   origin/josh-sync-state/
+#     <target>/<branch>.json    (e.g., billing/main.json)
+#
+# JSON per state file:
+#   {
+#     "last_forward": { "mono_sha": "...", "subrepo_sha": "...", "timestamp": "...", "status": "..." },
+#     "last_reverse": { "subrepo_sha": "...", "mono_sha": "...", "timestamp": "...", "status": "..." }
+#   }
+#
+# Forward and reverse state are independent — updated with jq merge.
+#
+# Requires: lib/core.sh sourced first
+# Expects: JOSH_SYNC_TARGET_NAME, BOT_NAME, BOT_EMAIL (set by load_target)
+
+STATE_BRANCH="${JOSH_SYNC_STATE_BRANCH:-josh-sync-state}"
+
+# ─── State Key ──────────────────────────────────────────────────────
+# Namespace with target: "billing" + "main" → "billing/main"
+# Slashes in branch names converted to hyphens.
+
+state_key() {
+  local branch_key="${1//\//-}"
+  echo "${JOSH_SYNC_TARGET_NAME}/${branch_key}"
+}
+
+# ─── Read State ─────────────────────────────────────────────────────
+
+read_state() {
+  local key
+  key=$(state_key "$1")
+  git fetch origin "$STATE_BRANCH" 2>/dev/null || true
+  git show "origin/${STATE_BRANCH}:${key}.json" 2>/dev/null || echo '{}'
+}
+
+# ─── Write State ────────────────────────────────────────────────────
+# Uses git worktree to avoid touching the working tree.
+
+write_state() {
+  local key
+  key=$(state_key "$1")
+  local state_json="$2"
+  local tmp_dir
+  tmp_dir=$(mktemp -d)
+
+  # Try to check out existing state branch, or create orphan
+  if git rev-parse "origin/${STATE_BRANCH}" >/dev/null 2>&1; then
+    git worktree add "$tmp_dir" "origin/${STATE_BRANCH}" 2>/dev/null
+  else
+    git worktree add --detach "$tmp_dir" 2>/dev/null
+    (cd "$tmp_dir" && git checkout --orphan "$STATE_BRANCH" && git rm -rf . 2>/dev/null || true)
+  fi
+
+  # Create target subdirectory and write state
+  mkdir -p "$(dirname "${tmp_dir}/${key}.json")"
+  echo "$state_json" | jq '.' > "${tmp_dir}/${key}.json"
+
+  (
+    cd "$tmp_dir"
+    git add -A
+    if ! git diff --cached --quiet 2>/dev/null; then
+      git -c user.name="$BOT_NAME" -c user.email="$BOT_EMAIL" \
+        commit -m "state: update ${key}"
+      git push origin "HEAD:${STATE_BRANCH}" || log "WARN" "Failed to push state"
+    fi
+  )
+
+  git worktree remove "$tmp_dir" 2>/dev/null || rm -rf "$tmp_dir"
+}