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ctargets

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

buck2 ctargets​

Resolve target patterns to configured targets

Usage: buck2 ctargets [OPTIONS] [TARGET_PATTERNS]...

Arguments:​

  • <TARGET_PATTERNS> Patterns to interpret

Common Options:​

Common options are documented on the Common Options page.

Options:​

  • --json Print targets as JSON

  • --skip-missing-targets Skip missing targets from BUCK files when non-glob pattern is specified. This option does not skip missing packages and does not ignore errors of BUCK file evaluation

  • -A, --output-all-attributes Output all attributes, equivalent of --output-attribute ''.

    Avoid using this flag in automation because it may be expensive to produce certain attributes, and because it makes harder to track which special attributes are used.

  • -B, --output-basic-attributes Output basic attributes, namely those the user can supply, plus rule type and package name

  • -a, --output-attribute <ATTRIBUTE> Regular expressions to match attributes. Regular expressions are used in "search" mode, so for example empty string matches all attributes including special attributes.

    When using in automation, please specify the regular expression to match the attribute precisely, for example --output-attribute '^headers$' to make it easier to track which special attributes are used.

  • --output-attributes <ATTRIBUTE> Deprecated: Use --output-attribute instead.

    List of space-separated attributes to output, --output-attributes attr1 attr2.

  • --target-platforms <PLATFORM> Configuration target (one) to use to configure targets

  • -m, --modifier <VALUE> A configuration modifier to configure all targets on the command line. This may be a constraint value target.

  • --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.

  • --profile-patterns <PROFILE_PATTERNS> Enables profiling for all evaluations whose evaluation identifier matches one of the provided patterns.

    Some examples identifiers: analysis/cell//buck2/app/buck2_action_impl:buck2_action_impl (cfg:linux-x86_64#27ac5723e0c99706) load/cell//build_defs/json.bzl load/prelude//playground/test.bxl load/cell//build_defs/json.bzl@other_cell load_buildfile/fbcode//third-party-buck/platform010/build/ncurses load_packagefile/fbcode//cli/rust/cli_delegate anon_analysis/anon//:_anon_link_rule (anon: 766183dc9b6f680a) (fbcode//buck2/platform/execution:linux-x86_64#08961b14cfb182aa) bxl/prelude//playground/test.bxl:playground

    You can pass --profile-patterns=.* to enable no-op profiling for everything (additionally pass --profile-patterns-mode=none to use no-op profiling to just get a list of all the identifiers).

    The profile results will be written to individual .profile files in <ROOT_OUTPUT>/<data+time>-<uuid>/ where ROOT_OUTPUT comes from the --profile-patterns-output flag. In that directory there will also be a file listing all the identifiers that were profiled.

    Enabling/disabling profiling of an evaluation will invalidate the results of that evaluation and it will be recomputed. In some cases, this will cause other work to also need to be redone (for example, invalidating the result of loading PACKAGE files causes all consumers to be recomputed). But if you keep profiling options consistent between commands, only the work that is otherwise invalidated will be redone (and only for those would profiling results be created).

    You must also pass --profile-patterns-mode and --profile-patterns-output.

  • --profile-patterns-output <PATH>

  • --profile-patterns-mode <PROFILE_PATTERNS_MODE> Profile mode.

    Memory profiling modes have suffixes either -allocated or -retained.

    -retained means memory kept in frozen starlark heaps after analysis completes. -retained does not work when profiling loading, because no memory is retained after loading and frozen heap is not even created. This is probably what you want when profiling analysis.

    -allocated means allocated memory, including memory which is later garbage collected.

    • Possible values:
      • time-flame
      • heap-allocated
      • heap-retained
      • heap-flame-allocated
      • heap-flame-retained
      • heap-summary-allocated
      • heap-summary-retained
      • statement
      • bytecode
      • bytecode-pairs
      • typecheck
      • coverage
      • none