Add scripts/deploy_static_site.sh

2026-04-18 23:29:23 -03:00
parent 5b050c4a21
commit 0d0a930afb
1 changed files with 94 additions and 0 deletions
@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+#
+# Deploy static files using release directories and an atomic symlink switch.
+#
+# This pattern reduces partial deployments because files are copied to a new
+# release directory first. The live path changes only when the copy succeeds.
+#
+# Usage:
+#   bash deploy_static_site.sh --source ./dist --releases /var/www/releases --current /var/www/current
+#   bash deploy_static_site.sh --source ./dist --releases /var/www/releases --current /var/www/current --keep 10
+#
+# Options:
+#   --source DIR     Directory containing built static files.
+#   --releases DIR   Directory that stores timestamped releases.
+#   --current PATH   Symlink path used by the web server.
+#   --keep N         Number of releases to keep. Default: 5.
+#   --help           Show this help message.
+
+set -Eeuo pipefail
+
+source_dir=""
+releases_dir=""
+current_link=""
+keep_releases="5"
+
+usage() {
+  sed -n '2,22p' "$0" | sed 's/^# \{0,1\}//'
+}
+
+log() {
+  printf '[%s] %s\n' "$(date -Is)" "$*"
+}
+
+while [[ "$#" -gt 0 ]]; do
+  case "$1" in
+    --source)
+      source_dir="${2:-}"
+      shift 2
+      ;;
+    --releases)
+      releases_dir="${2:-}"
+      shift 2
+      ;;
+    --current)
+      current_link="${2:-}"
+      shift 2
+      ;;
+    --keep)
+      keep_releases="${2:-}"
+      [[ "$keep_releases" =~ ^[0-9]+$ ]] || { printf 'ERROR: --keep must be an integer.\n' >&2; exit 1; }
+      shift 2
+      ;;
+    --help|-h)
+      usage
+      exit 0
+      ;;
+    *)
+      printf 'ERROR: unknown option: %s\n' "$1" >&2
+      usage >&2
+      exit 1
+      ;;
+  esac
+done
+
+[[ -d "$source_dir" ]] || { printf 'ERROR: source directory does not exist: %s\n' "$source_dir" >&2; exit 1; }
+[[ -n "$releases_dir" ]] || { printf 'ERROR: --releases is required.\n' >&2; exit 1; }
+[[ -n "$current_link" ]] || { printf 'ERROR: --current is required.\n' >&2; exit 1; }
+
+mkdir -p "$releases_dir"
+
+release_id="$(date +%Y%m%d-%H%M%S)"
+release_path="${releases_dir}/${release_id}"
+
+log "Creating release directory: ${release_path}"
+mkdir -p "$release_path"
+
+log "Copying files from ${source_dir}"
+if command -v rsync >/dev/null 2>&1; then
+  rsync -a --delete "${source_dir}/" "${release_path}/"
+else
+  cp -a "${source_dir}/." "$release_path/"
+fi
+
+log "Switching current symlink to ${release_path}"
+ln -sfn "$release_path" "$current_link"
+
+log "Removing old releases, keeping the newest ${keep_releases}."
+find "$releases_dir" -mindepth 1 -maxdepth 1 -type d -printf '%T@ %p\n' \
+  | sort -nr \
+  | awk -v keep="$keep_releases" 'NR > keep {print $2}' \
+  | xargs -r rm -rf
+
+log "Deployment completed successfully."
+