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clean

This document provides an overview of the commands and options available under buck2 clean.

buck2 clean​

Delete generated files and caches.

The command also kills the buck2 daemon.

Usage: buck2 clean [OPTIONS]

Options:​

  • --dry-run Performs a dry-run and prints the paths that would be removed.

  • --stale <DURATION> Delete artifacts from buck-out older than 1 week or older than the specified duration, without killing the daemon

  • --tracked-only Only considers tracked artifacts for cleanup.

    buck-out can contain untracked artifacts for different reasons: - Outputs from aborted actions - State getting deleted (e.g., new buckversion that changes the on-disk state format) - Writing to buck-out without being expected by Buck

  • -m, --modifier <VALUE> This option is not used

  • -c, --config <SECTION.OPTION=VALUE> List of config options

  • --config-file <PATH> List of config file paths

  • --fake-host <HOST>

    • Possible values:
      • default
      • linux
      • macos
      • windows

  • --fake-arch <ARCH>

    • Possible values:
      • default
      • aarch64
      • x8664

  • --fake-xcode-version <VERSION-BUILD> Value must be formatted as: version-build (e.g., 14.3.0-14C18 or 14.1-14B47b)

  • --reuse-current-config Re-uses any --config values (inline or via modefiles) if there's a previous command, otherwise the flag is ignored.

    If there is a previous command and --reuse-current-config is set, then the old config is used, ignoring any overrides.

    If there is no previous command but the flag was set, then the flag is ignored, the command behaves as if the flag was not set at all.

  • --exit-when-different-state Used for exiting a concurrent command when a different state is detected

  • --preemptible <PREEMPTIBLE> Used to configure when this command could be preempted by another command for the same isolation dir.

    Normally, when you run two commands - from different terminals, say - buck2 will attempt to run them in parallel. However, if the two commands are based on different state, that is they either have different configs or different filesystem states, buck2 cannot run them in parallel. The default behavior in this case is to block the second command until the first completes.

    • Possible values:
      • never: (default) When another command starts that cannot run in parallel with this one, block that command
      • always: When another command starts, interrupt this command, even if they could run in parallel. There is no good reason to use this other than that it provides slightly nicer superconsole output
      • ondifferentstate: When another command starts that cannot run in parallel with this one, interrupt this command

  • --disable-starlark-types Disable runtime type checking in Starlark interpreter.

    This option is not stable, and can be used only locally to diagnose evaluation performance problems.

  • --stack Record or show target call stacks.

    Starlark call stacks will be included in duplicate targets error.

    If a command outputs targets (like targets command), starlark call stacks will be printed after the targets.

  • --console <super|simple|...> Which console to use for this command

    • Default value: auto
    • Possible values:
      • auto
      • none
      • simple
      • simplenotty
      • simpletty
      • super

  • --ui <UI> Configure additional superconsole ui components.

    Accepts a comma-separated list of superconsole components to add. Possible values are:

    dice - shows information about evaluated dice nodes debugevents - shows information about the flow of events from buckd

    These components can be turned on/off interactively. Press 'h' for help when superconsole is active.

    • Possible values:
      • dice
      • debugevents
      • io: I/O panel
      • re: RE panel

  • --no-interactive-console Disable console interactions

  • --event-log <PATH> Write events to this log file

  • --write-build-id <PATH> Write command invocation id into this file

  • --unstable-write-invocation-record <PATH> Write the invocation record (as JSON) to this path. No guarantees whatsoever are made regarding the stability of the format

  • --command-report-path <PATH> Write the command report to this path. A command report is always written to buck-out/v2/&lt;uuid&gt;/command_report even without this flag