Rollback#332
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# Bootleg: Timestamped Release Directories (Breaking Change) ## Context Bootleg currently deploys by unpacking a tarball directly into the workspace root, resulting in a flat `<workspace>/<appname>/` directory that gets overwritten on every deploy. This makes rollback impossible and leaves no deployment history. This change implements the Capistrano-style pattern proposed in [labzero#243](labzero#243): each deploy unpacks into a timestamped directory under `releases/`, and a `current` symlink points at the active release. This is a **breaking change** — the flat deploy structure is removed entirely with no backward-compat mode. ## Target directory structure on `:app` hosts ``` <workspace>/ ├── releases/ │ ├── 20240101120000/ ← previous │ │ ├── bin/myapp │ │ ├── lib/ │ │ └── releases/ │ └── 20240115093000/ ← current │ ├── bin/myapp │ └── ... └── current -> releases/20240115093000 ``` ## Files changed - `lib/bootleg/tasks/deploy.exs` — `:unpack_release` now extracts into `releases/<ts>/`, symlinks `current`, deletes tarball, optionally prunes via `config :keep_releases, N` - `lib/bootleg/tasks/start.exs`, `stop.exs`, `restart.exs`, `ping.exs`, `update.exs` — all `bin/<app>` paths changed to `current/bin/<app>` - `lib/bootleg/tasks/rollback.exs` (new) — re-points `current` at the second-most-recent release and restarts - `lib/mix/tasks/rollback.ex` (new) — exposes `mix bootleg.rollback` ## New optional config key ```elixir config :keep_releases, 5 # prune to last N releases after each deploy; omit to keep all ``` ## Notes `--strip-components` was dropped in favour of extract-then-move because BusyBox `tar` (Alpine Linux) silently ignores that flag. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
We timestamp the folder and archive name when we create the tarball from the elixir build. This lets us not worry so much about passing around the timestamp to the different parts of deploy that need it and rather just looking for the newest folder in releases/ when we update the current/ pointer.
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Description
Implements Rollback Strategy by timestamping releases and keeping a current pointer to the active release.
Fixes #243
Type of change
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