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v4.0.0

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@github-actions github-actions released this 24 Aug 16:50
· 40 commits to main since this release
v4.0.0
1cf8083

Task is now a Rust program. v4.0.0 is a full rewrite that aims to be drop-in
compatible.

Highlights

  • Local deduplicated cache. A content-defined-chunking, zstd-compressed,
    content-addressed cache (the ocicas crate) backs --export-cache /
    --import-cache and the OCI cache backend, so shared build outputs are stored
    and transferred once.
  • Native Jinja templating (opt-in), with migration. Alongside the existing
    Go text/template syntax, a Taskfile can opt into native
    minijinja with templater: jinja,
    unlocking {% for %}, {% if %}, filters, and function-call syntax. The
    dialect is auto-detected per file; task --migrate converts a Go-syntax
    Taskfile to Jinja (preview by default, --write to apply).
  • Go template syntax is deprecated. Files that still use it get a one-time
    warning pointing at task --migrate. Go rendering will be removed in a future
    release; migration will remain. Suppress the warning with
    TASK_NO_GO_DEPRECATION=1.
  • vk-registry distributed lock. cache.lock: vk://host/<prefix> takes the
    build-once lock over the registry's own /lock API, so one vk-registry serves
    both the oci:// cache and the lock with no separate Redis. Credentials come
    from the URL (Basic) or $TASK_VK_LOCK_TOKEN (bearer); the lease is renewed
    by a heartbeat and expires 30 s after a holder goes away.
  • Single static binary. The release build links no system C libraries
    (musl-static, rustls+ring) and ships as one file.

Intentional differences from Task v3

  • A duplicate task key in a Taskfile is now an error instead of silently
    taking the last definition.
  • Task env/vars take precedence over the process environment by default. A
    task-defined env/vars value overrides one already present in the inherited
    environment; set TASK_X_ENV_PRECEDENCE=0 to restore the old order where the
    process environment wins.
  • Remote (HTTP) Taskfiles are not supported.

Known gaps

  • Storing cache contents in Redis (cache.url: redis://) is not supported.
    (The file and OCI cache backends, and the Redis and vk-registry distributed
    locks — cache.lock: redis:// and vk:// — all work.)
  • Syntax highlighting in error snippets.
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