Version: 2.25 (dev)

Global options

Options to control the overall behavior of Pants.

Backend: pants.backend.python.lint.isort

Config section: [GLOBAL]

Basic options

`colors`

--[no-]colors
PANTS_COLORS

pants.toml
[GLOBAL]
colors = <bool>

default: False

Whether Pants should use colors in output or not. This may also impact whether some tools Pants runs use color.

When unset, this value defaults based on whether the output destination supports color.

`concurrent`

--[no-]concurrent
PANTS_CONCURRENT

pants.toml
[GLOBAL]
concurrent = <bool>

default: False

Enable concurrent runs of Pants. With this enabled, Pants will start up all concurrent invocations (e.g. in other terminals) without pantsd. As a result, enabling this option will increase the per-run startup cost, but will not block subsequent invocations.

`dynamic_ui`

--[no-]dynamic-ui
PANTS_DYNAMIC_UI

pants.toml
[GLOBAL]
dynamic_ui = <bool>

default: True

Display a dynamically-updating console UI as Pants runs. This is true by default if Pants detects a TTY and there is no 'CI' environment variable indicating that Pants is running in a continuous integration environment.

`dynamic_ui_renderer`

--dynamic-ui-renderer=<DynamicUIRenderer>
PANTS_DYNAMIC_UI_RENDERER

pants.toml
[GLOBAL]
dynamic_ui_renderer = <DynamicUIRenderer>

one of: indicatif-spinner, experimental-prodash
default: indicatif-spinner

If --dynamic-ui is enabled, selects the renderer.

`keep_sandboxes`

--keep-sandboxes=<KeepSandboxes>
PANTS_KEEP_SANDBOXES

pants.toml
[GLOBAL]
keep_sandboxes = <KeepSandboxes>

one of: always, on_failure, never
default: never

Controls whether Pants will clean up local directories used as chroots for running processes.

Pants will log their location so that you can inspect the chroot, and run the __run.sh script to recreate the process using the same argv and environment variables used by Pants. This option is useful for debugging.

`level`

-l<LogLevel>, --level=<LogLevel>
PANTS_LEVEL

pants.toml
[GLOBAL]
level = <LogLevel>

one of: trace, debug, info, warn, error
default: info

Set the logging level.

`local_cache`

--[no-]local-cache
PANTS_LOCAL_CACHE

pants.toml
[GLOBAL]
local_cache = <bool>

default: True

Whether to cache process executions in a local cache persisted to disk at --local-store-dir.

`loop`

--[no-]loop
PANTS_LOOP

pants.toml
[GLOBAL]
loop = <bool>

default: False

Run goals continuously as file changes are detected.

`pantsd`

--[no-]pantsd
PANTS_PANTSD

pants.toml
[GLOBAL]
pantsd = <bool>

default: True

Enables use of the Pants daemon (pantsd). pantsd can significantly improve runtime performance by lowering per-run startup cost, and by memoizing filesystem operations and rule execution.

`remote_cache_read`

--[no-]remote-cache-read
PANTS_REMOTE_CACHE_READ

pants.toml
[GLOBAL]
remote_cache_read = <bool>

default: False

Whether to enable reading from a remote cache.

This cannot be used at the same time as [GLOBAL].remote_execution.

`remote_cache_write`

--[no-]remote-cache-write
PANTS_REMOTE_CACHE_WRITE

pants.toml
[GLOBAL]
remote_cache_write = <bool>

default: False

Whether to enable writing results to a remote cache.

This cannot be used at the same time as [GLOBAL].remote_execution.

`remote_execution`

--[no-]remote-execution
PANTS_REMOTE_EXECUTION

pants.toml
[GLOBAL]
remote_execution = <bool>

default: False

Enables remote workers for increased parallelism. (Alpha)

Alternatively, you can use [GLOBAL].remote_cache_read and [GLOBAL].remote_cache_write to still run everything locally, but to use a remote cache.

`remote_provider`

--remote-provider=<RemoteProvider>
PANTS_REMOTE_PROVIDER

pants.toml
[GLOBAL]
remote_provider = <RemoteProvider>

one of: reapi, experimental-file, experimental-github-actions-cache
default: reapi

The type of provider to use, if using a remote cache and/or remote execution, See https://www.pantsbuild.org/2.25/docs/using-pants/remote-caching-and-execution for details.

Each provider supports different remote_store_address and (optional) remote_execution_address URIs.

Supported values:

reapi: a server using the Remote Execution API (https://github.com/bazelbuild/remote-apis) (supported schemes for URIs: grpc://, grpcs://)
experimental-file: a directory mapped on the current machine (supported schemes for URIs: file://)
experimental-github-actions-cache: the GitHub Actions caching service (supported schemes for URIs: http://, https://)

`session_end_tasks_timeout`

--session-end-tasks-timeout=<float>
PANTS_SESSION_END_TASKS_TIMEOUT

pants.toml
[GLOBAL]
session_end_tasks_timeout = <float>

default: 3.0

The time in seconds to wait for still-running "session end" tasks to complete before finishing completion of a Pants invocation. "Session end" tasks include, for example, writing data that was generated during the applicable Pants invocation to a configured remote cache.

`spec_files`

--spec-files="['<str>', '<str>', ...]"
PANTS_SPEC_FILES

pants.toml
[GLOBAL]
spec_files = [
    '<str>',
    '<str>',
    ...,
]

default: []

Read additional specs (target addresses, files, and/or globs), one per line, from these files.

`tag`

--tag="[[+-]tag1,tag2,..., [+-]tag1,tag2,..., ...]"
PANTS_TAG

pants.toml
[GLOBAL]
tag = [
    [+-]tag1,tag2,...,
    [+-]tag1,tag2,...,
    ...,
]

default: []

Include only targets with these tags (optional '+' prefix) or without these tags ('-' prefix). See https://www.pantsbuild.org/2.25/docs/using-pants/advanced-target-selection.

Advanced options

`allow_deprecated_macos_versions`

--allow-deprecated-macos-versions="['<str>', '<str>', ...]"
PANTS_ALLOW_DEPRECATED_MACOS_VERSIONS

pants.toml
[GLOBAL]
allow_deprecated_macos_versions = [
    '<str>',
    '<str>',
    ...,
]

default: []

Silence warnings/errors about running Pants on these versions of macOS. Pants only supports recent versions of macOS. You can try running on older versions, but it may or may not work.

If you have questions or concerns about this, please reach out to us at https://www.pantsbuild.org/community/getting-help.

`backend_packages`

--backend-packages="['<str>', '<str>', ...]"
PANTS_BACKEND_PACKAGES

pants.toml
[GLOBAL]
backend_packages = [
    '<str>',
    '<str>',
    ...,
]

default: []

The backend packages must be present on the PYTHONPATH, typically because they are in the Pants core dist, in a plugin dist, or available as sources in the repo.

`build_file_prelude_globs`

--build-file-prelude-globs="['<str>', '<str>', ...]"
PANTS_BUILD_FILE_PRELUDE_GLOBS

pants.toml
[GLOBAL]
build_file_prelude_globs = [
    '<str>',
    '<str>',
    ...,
]

default: []

Python files to evaluate and whose symbols should be exposed to all BUILD files. See https://www.pantsbuild.org/2.25/docs/writing-plugins/macros.

`build_ignore`

--build-ignore="['<str>', '<str>', ...]"
PANTS_BUILD_IGNORE

pants.toml
[GLOBAL]
build_ignore = [
    '<str>',
    '<str>',
    ...,
]

default: []

Path globs or literals to ignore when identifying BUILD files.

This does not affect any other filesystem operations; use --pants-ignore for that instead.

`build_patterns`

--build-patterns="['<str>', '<str>', ...]"
PANTS_BUILD_PATTERNS

pants.toml
[GLOBAL]
build_patterns = [
    '<str>',
    '<str>',
    ...,
]

default:

[
  "BUILD",
  "BUILD.*"
]

The naming scheme for BUILD files, i.e. where you define targets.

This only sets the naming scheme, not the directory paths to look for. To add ignore patterns, use the option [GLOBAL].build_ignore.

You may also need to update the option [tailor].build_file_name so that it is compatible with this option.

`ca_certs_path`

--ca-certs-path=<str>
PANTS_CA_CERTS_PATH

pants.toml
[GLOBAL]
ca_certs_path = <str>

default: None

Path to a file containing PEM-format CA certificates used for verifying secure connections when downloading files required by a build.

Even when using the docker_environment and remote_environment targets, this path will be read from the local host, and those certs will be used in the environment.

This option cannot be overridden via environment targets, so if you need a different value than what the rest of your organization is using, override the value via an environment variable, CLI argument, or .pants.rc file. See https://www.pantsbuild.org/2.25/docs/using-pants/key-concepts/options.

`cache_content_behavior`

--cache-content-behavior=<CacheContentBehavior>
PANTS_CACHE_CONTENT_BEHAVIOR

pants.toml
[GLOBAL]
cache_content_behavior = <CacheContentBehavior>

one of: fetch, validate, defer
default: fetch

Controls how the content of cache entries is handled during process execution.

When using a remote cache, the fetch behavior will fetch remote cache content from the remote store before considering the cache lookup a hit, while the validate behavior will only validate (for either a local or remote cache) that the content exists, without fetching it.

The defer behavior, on the other hand, will neither fetch nor validate the cache content before calling a cache hit a hit. This "defers" actually fetching the cache entry until Pants needs it (which may be never).

The defer mode is the most network efficient (because it will completely skip network requests in many cases), followed by the validate mode (since it can still skip fetching the content if no consumer ends up needing it). But both the validate and defer modes rely on an experimental feature called "backtracking" to attempt to recover if content later turns out to be missing (validate has a much narrower window for backtracking though, since content would need to disappear between validation and consumption: generally, within one pantsd session).

`docker_execution`

--[no-]docker-execution
PANTS_DOCKER_EXECUTION

pants.toml
[GLOBAL]
docker_execution = <bool>

default: True

If true, docker_environment targets can be used to run builds inside a Docker container.

If false, anytime a docker_environment target is used, Pants will instead fallback to whatever the target's fallback_environment field is set to.

This can be useful, for example, if you want to always use Docker locally, but disable it in CI, or vice versa.

`enable_target_origin_sources_blocks`

--[no-]enable-target-origin-sources-blocks
PANTS_ENABLE_TARGET_ORIGIN_SOURCES_BLOCKS

pants.toml
[GLOBAL]
enable_target_origin_sources_blocks = <bool>

default: False

Enable fine grained target analysis based on line numbers.

`engine_visualize_to`

--engine-visualize-to=<dir_option>
PANTS_ENGINE_VISUALIZE_TO

pants.toml
[GLOBAL]
engine_visualize_to = <dir_option>

default: None

A directory to write execution and rule graphs to as dot files. The contents of the directory will be overwritten if any filenames collide.

`file_downloads_max_attempts`

--file-downloads-max-attempts=<int>
PANTS_FILE_DOWNLOADS_MAX_ATTEMPTS

pants.toml
[GLOBAL]
file_downloads_max_attempts = <int>

default: 4

When Pants downloads files (for example, for the http_source source), Pants will retry the download if a "retryable" error occurs.

This option sets the maximum number of attempts Pants will make to try to download the file before giving up with an error.

`file_downloads_retry_delay`

--file-downloads-retry-delay=<float>
PANTS_FILE_DOWNLOADS_RETRY_DELAY

pants.toml
[GLOBAL]
file_downloads_retry_delay = <float>

default: 0.2

When Pants downloads files (for example, for the http_source source), Pants will retry the download if a "retryable" error occurs. Between each attempt, Pants will delay a random amount of time using an exponential backoff algorithm.

This option sets the "base" duration in seconds used for calculating the retry delay.

`ignore_warnings`

--ignore-warnings="['<str>', '<str>', ...]"
PANTS_IGNORE_WARNINGS

pants.toml
[GLOBAL]
ignore_warnings = [
    '<str>',
    '<str>',
    ...,
]

default: []

Ignore logs and warnings matching these strings.

Normally, Pants will look for literal matches from the start of the log/warning message, but you can prefix the ignore with $regex$ for Pants to instead treat your string as a regex pattern. For example:

ignore_warnings = [
    "DEPRECATED: option 'config' in scope 'flake8' will be removed",
    '$regex$:No files\s*'
]

`local_execution_root_dir`

--local-execution-root-dir=<str>
PANTS_LOCAL_EXECUTION_ROOT_DIR

pants.toml
[GLOBAL]
local_execution_root_dir = <str>

default: <tmp_dir>

Directory to use for local process execution sandboxing.

The path may be absolute or relative. If the directory is within the build root, be sure to include it in --pants-ignore.

`local_store_dir`

--local-store-dir=<str>
PANTS_LOCAL_STORE_DIR

pants.toml
[GLOBAL]
local_store_dir = <str>

default: $XDG_CACHE_HOME/pants/lmdb_store

Directory to use for the local file store, which stores the results of subprocesses run by Pants.

The path may be absolute or relative. If the directory is within the build root, be sure to include it in --pants-ignore.

`local_store_directories_max_size_bytes`

--local-store-directories-max-size-bytes=<int>
PANTS_LOCAL_STORE_DIRECTORIES_MAX_SIZE_BYTES

pants.toml
[GLOBAL]
local_store_directories_max_size_bytes = <int>

default: 16000000000

The maximum size in bytes of the local store containing directories. Stored below --local-store-dir.

`local_store_files_max_size_bytes`

--local-store-files-max-size-bytes=<int>
PANTS_LOCAL_STORE_FILES_MAX_SIZE_BYTES

pants.toml
[GLOBAL]
local_store_files_max_size_bytes = <int>

default: 256000000000

The maximum size in bytes of the local store containing files. Stored below --local-store-dir.

NB: This size value bounds the total size of all files, but (due to sharding of the store on disk) it also bounds the per-file size to (VALUE / --local-store-shard-count).

This value doesn't reflect space allocated on disk, or RAM allocated (it may be reflected in VIRT but not RSS). However, the default is lower than you might otherwise choose because macOS creates core dumps that include MMAP'd pages, and setting this too high might cause core dumps to use an unreasonable amount of disk if they are enabled.

`local_store_processes_max_size_bytes`

--local-store-processes-max-size-bytes=<int>
PANTS_LOCAL_STORE_PROCESSES_MAX_SIZE_BYTES

pants.toml
[GLOBAL]
local_store_processes_max_size_bytes = <int>

default: 16000000000

The maximum size in bytes of the local store containing process cache entries. Stored below --local-store-dir.

`local_store_shard_count`

--local-store-shard-count=<int>
PANTS_LOCAL_STORE_SHARD_COUNT

pants.toml
[GLOBAL]
local_store_shard_count = <int>

default: 16

The number of LMDB shards created for the local store. This setting also impacts the maximum size of stored files: see --local-store-files-max-size-bytes for more information.

Because LMDB allows only one simultaneous writer per database, the store is split into multiple shards to allow for more concurrent writers. The faster your disks are, the fewer shards you are likely to need for performance.

NB: After changing this value, you will likely want to manually clear the --local-store-dir directory to clear the space used by old shard layouts.

`log_levels_by_target`

--log-levels-by-target="{'key1': val1, 'key2': val2, ...}"
PANTS_LOG_LEVELS_BY_TARGET

pants.toml
[GLOBAL.log_levels_by_target]
key1 = val1
key2 = val2
...

default: {}

Set a more specific logging level for one or more logging targets. The names of logging targets are specified in log strings when the --show-log-target option is set. The logging levels are one of: "error", "warn", "info", "debug", "trace". All logging targets not specified here use the global log level set with --level. For example, you can set --log-levels-by-target='{"workunit_store": "info", "pants.engine.rules": "warn"}'.

`log_show_rust_3rdparty`

--[no-]log-show-rust-3rdparty
PANTS_LOG_SHOW_RUST_3RDPARTY

pants.toml
[GLOBAL]
log_show_rust_3rdparty = <bool>

default: False

Whether to show/hide logging done by 3rdparty Rust crates used by the Pants engine.

`logdir`

--logdir=<dir>
PANTS_LOGDIR

pants.toml
[GLOBAL]
logdir = <dir>

default: None

Write logs to files under this directory.

`loop_max`

--loop-max=<int>
PANTS_LOOP_MAX

pants.toml
[GLOBAL]
loop_max = <int>

default: 4294967296

The maximum number of times to loop when --loop is specified.

`named_caches_dir`

--named-caches-dir=<str>
PANTS_NAMED_CACHES_DIR

pants.toml
[GLOBAL]
named_caches_dir = <str>

default: $XDG_CACHE_HOME/pants/named_caches

Directory to use for named global caches for tools and processes with trusted, concurrency-safe caches.

The path may be absolute or relative. If the directory is within the build root, be sure to include it in --pants-ignore.

`pants_bin_name`

--pants-bin-name=<str>
PANTS_BIN_NAME

pants.toml
[GLOBAL]
pants_bin_name = <str>

default: pants

The name of the script or binary used to invoke Pants. Useful when printing help messages.

`pants_config_files`

--pants-config-files="['<str>', '<str>', ...]"
PANTS_CONFIG_FILES

pants.toml
[GLOBAL]
pants_config_files = [
    '<str>',
    '<str>',
    ...,
]

default:

[
  "<buildroot>/pants.toml"
]

Paths to Pants config files. This may only be set through the environment variable PANTS_CONFIG_FILES and the command line argument --pants-config-files; it will be ignored if in a config file like pants.toml.

`pants_distdir`

--pants-distdir=<dir>
PANTS_DISTDIR

pants.toml
[GLOBAL]
pants_distdir = <dir>

default: <buildroot>/dist

Write end products, such as the results of pants package, to this dir.

`pants_ignore`

--pants-ignore="['<str>', '<str>', ...]"
PANTS_IGNORE

pants.toml
[GLOBAL]
pants_ignore = [
    '<str>',
    '<str>',
    ...,
]

default:

[
  ".*/",
  "/dist/",
  "__pycache__",
  "!.semgrep/",
  "!.github/"
]

Paths to ignore for all filesystem operations performed by pants (e.g. BUILD file scanning, glob matching, etc).

Patterns use the gitignore syntax (https://git-scm.com/docs/gitignore). The pants_distdir and pants_workdir locations are automatically ignored.

pants_ignore can be used in tandem with pants_ignore_use_gitignore; any rules specified here are applied after rules specified in a .gitignore file.

`pants_ignore_use_gitignore`

--[no-]pants-ignore-use-gitignore
PANTS_IGNORE_USE_GITIGNORE

pants.toml
[GLOBAL]
pants_ignore_use_gitignore = <bool>

default: True

Include patterns from .gitignore, .git/info/exclude, and the global gitignore files in the option [GLOBAL].pants_ignore, which is used for Pants to ignore filesystem operations on those patterns.

Patterns from [GLOBAL].pants_ignore take precedence over these files' rules. For example, you can use !my_pattern in pants_ignore to have Pants operate on files that are gitignored.

Warning: this does not yet support reading nested gitignore files.

`pants_physical_workdir_base`

--pants-physical-workdir-base=<dir>
PANTS_PHYSICAL_WORKDIR_BASE

pants.toml
[GLOBAL]
pants_physical_workdir_base = <dir>

default: None

When set, a base directory in which to store --pants-workdir contents. If this option is a set, the workdir will be created as symlink into a per-workspace subdirectory.

`pants_subprocessdir`

--pants-subprocessdir=<str>
PANTS_SUBPROCESSDIR

pants.toml
[GLOBAL]
pants_subprocessdir = <str>

default: <buildroot>/.pants.d/pids

The directory to use for tracking subprocess metadata. This should live outside of the dir used by pants_workdir to allow for tracking subprocesses that outlive the workdir data.

`pants_version`

--pants-version=<str>
PANTS_VERSION

pants.toml
[GLOBAL]
pants_version = <str>

default: <pants_version>

Use this Pants version. Note that Pants only uses this to verify that you are using the requested version, as Pants cannot dynamically change the version it is using once the program is already running.

If you use the pants script from https://www.pantsbuild.org/2.25/docs/getting-started/installing-pants, however, changing the value in your pants.toml will cause the new version to be installed and run automatically.

Run pants --version to check what is being used.

`pants_workdir`

--pants-workdir=<dir>
PANTS_WORKDIR

pants.toml
[GLOBAL]
pants_workdir = <dir>

default: <buildroot>/.pants.d/workdir

Write intermediate logs and output files to this dir.

`pantsd_invalidation_globs`

--pantsd-invalidation-globs="['<str>', '<str>', ...]"
PANTS_PANTSD_INVALIDATION_GLOBS

pants.toml
[GLOBAL]
pantsd_invalidation_globs = [
    '<str>',
    '<str>',
    ...,
]

default: []

Filesystem events matching any of these globs will trigger a daemon restart. Pants's own code, plugins, and --pants-config-files are inherently invalidated.

`pantsd_max_memory_usage`

--pantsd-max-memory-usage=<memory_size>
PANTS_PANTSD_MAX_MEMORY_USAGE

pants.toml
[GLOBAL]
pantsd_max_memory_usage = <memory_size>

default: 4GiB

The maximum memory usage of the pantsd process.

When the maximum memory is exceeded, the daemon will restart gracefully, although all previous in-memory caching will be lost. Setting too low means that you may miss out on some caching, whereas setting too high may over-consume resources and may result in the operating system killing Pantsd due to memory overconsumption (e.g. via the OOM killer).

You can suffix with GiB, MiB, KiB, or B to indicate the unit, e.g. 2GiB or 2.12GiB. A bare number will be in bytes.

There is at most one pantsd process per workspace.

`pantsd_pailgun_port`

--pantsd-pailgun-port=<int>
PANTS_PANTSD_PAILGUN_PORT

pants.toml
[GLOBAL]
pantsd_pailgun_port = <int>

default: 0

The port to bind the Pants nailgun server to. Defaults to a random port.

`pantsd_timeout_when_multiple_invocations`

--pantsd-timeout-when-multiple-invocations=<float>
PANTS_PANTSD_TIMEOUT_WHEN_MULTIPLE_INVOCATIONS

pants.toml
[GLOBAL]
pantsd_timeout_when_multiple_invocations = <float>

default: 60.0

The maximum amount of time to wait for the invocation to start until raising a timeout exception. Because pantsd currently does not support parallel runs, any prior running Pants command must be finished for the current one to start. To never timeout, use the value -1.

`pantsrc`

--[no-]pantsrc
PANTS_PANTSRC

pants.toml
[GLOBAL]
pantsrc = <bool>

default: True

Use pantsrc files located at the paths specified in the global option pantsrc_files.

`pantsrc_files`

--pantsrc-files="[<path>, <path>, ...]"
PANTS_PANTSRC_FILES

pants.toml
[GLOBAL]
pantsrc_files = [
    <path>,
    <path>,
    ...,
]

default:

[
  "/etc/pantsrc",
  "~/.pants.rc",
  ".pants.rc"
]

Override config with values from these files, using syntax matching that of --pants-config-files.

`plugins`

--plugins="['<str>', '<str>', ...]"
PANTS_PLUGINS

pants.toml
[GLOBAL]
plugins = [
    '<str>',
    '<str>',
    ...,
]

default: []

Allow backends to be loaded from these plugins (usually released through PyPI). The default backends for each plugin will be loaded automatically. Other backends in a plugin can be loaded by listing them in backend_packages in the [GLOBAL] scope.

`plugins_force_resolve`

--[no-]plugins-force-resolve
PANTS_PLUGINS_FORCE_RESOLVE

pants.toml
[GLOBAL]
plugins_force_resolve = <bool>

default: False

Re-resolve plugins, even if previously resolved.

`print_stacktrace`

--[no-]print-stacktrace
PANTS_PRINT_STACKTRACE

pants.toml
[GLOBAL]
print_stacktrace = <bool>

default: False

Print the full exception stack trace for any errors.

`process_execution_cache_namespace`

--process-execution-cache-namespace=<str>
PANTS_PROCESS_EXECUTION_CACHE_NAMESPACE

pants.toml
[GLOBAL]
process_execution_cache_namespace = <str>

default: None

The cache namespace for process execution. Change this value to invalidate every artifact's execution, or to prevent process cache entries from being (re)used for different use-cases or users.

`process_execution_graceful_shutdown_timeout`

--process-execution-graceful-shutdown-timeout=<int>
PANTS_PROCESS_EXECUTION_GRACEFUL_SHUTDOWN_TIMEOUT

pants.toml
[GLOBAL]
process_execution_graceful_shutdown_timeout = <int>

default: 3

The time in seconds to wait when gracefully shutting down an interactive process (such as one opened using pants run) before killing it.

`process_execution_local_enable_nailgun`

--[no-]process-execution-local-enable-nailgun
PANTS_PROCESS_EXECUTION_LOCAL_ENABLE_NAILGUN

pants.toml
[GLOBAL]
process_execution_local_enable_nailgun = <bool>

default: True

Whether or not to use nailgun to run JVM requests that are marked as supporting nailgun.

`process_execution_local_parallelism`

--process-execution-local-parallelism=<int>
PANTS_PROCESS_EXECUTION_LOCAL_PARALLELISM

pants.toml
[GLOBAL]
process_execution_local_parallelism = <int>

default: #cores

Number of concurrent processes that may be executed locally.

This value is independent of the number of threads that may be used to execute the logic in @rules (controlled by --rule-threads-core).

`process_execution_remote_parallelism`

--process-execution-remote-parallelism=<int>
PANTS_PROCESS_EXECUTION_REMOTE_PARALLELISM

pants.toml
[GLOBAL]
process_execution_remote_parallelism = <int>

default: 128

Number of concurrent processes that may be executed remotely.

`process_per_child_memory_usage`

--process-per-child-memory-usage=<memory_size>
PANTS_PROCESS_PER_CHILD_MEMORY_USAGE

pants.toml
[GLOBAL]
process_per_child_memory_usage = <memory_size>

default: 512MiB

The default memory usage for a single "pooled" child process.

Check the documentation for the --process-total-child-memory-usage for advice on how to choose an appropriate value for this option.

You can suffix with GiB, MiB, KiB, or B to indicate the unit, e.g. 2GiB or 2.12GiB. A bare number will be in bytes.

`process_total_child_memory_usage`

--process-total-child-memory-usage=<memory_size>
PANTS_PROCESS_TOTAL_CHILD_MEMORY_USAGE

pants.toml
[GLOBAL]
process_total_child_memory_usage = <memory_size>

default: None

The maximum memory usage for all "pooled" child processes.

When set, this value participates in precomputing the pool size of child processes used by Pants (pooling is currently used only for the JVM). When not set, Pants will default to spawning 2 * --process-execution-local-parallelism pooled processes.

A high value would result in a high number of child processes spawned, potentially overconsuming your resources and triggering the OS' OOM killer. A low value would mean a low number of child processes launched and therefore less parallelism for the tasks that need those processes.

If setting this value, consider also adjusting the value of the --process-per-child-memory-usage option.

You can suffix with GiB, MiB, KiB, or B to indicate the unit, e.g. 2GiB or 2.12GiB. A bare number will be in bytes.

`pythonpath`

--pythonpath="['<str>', '<str>', ...]"
PANTS_PYTHONPATH

pants.toml
[GLOBAL]
pythonpath = [
    '<str>',
    '<str>',
    ...,
]

default: []

Add these directories to PYTHONPATH to search for plugins. This does not impact the PYTHONPATH used by Pants when running your Python code.

`remote_ca_certs_path`

--remote-ca-certs-path=<str>
PANTS_REMOTE_CA_CERTS_PATH

pants.toml
[GLOBAL]
remote_ca_certs_path = <str>

default: None

Path to a PEM file containing CA certificates used for verifying secure connections to [GLOBAL].remote_execution_address and [GLOBAL].remote_store_address.

If unspecified, Pants will attempt to auto-discover root CA certificates when TLS is enabled with remote execution and caching.

`remote_cache_rpc_concurrency`

--remote-cache-rpc-concurrency=<int>
PANTS_REMOTE_CACHE_RPC_CONCURRENCY

pants.toml
[GLOBAL]
remote_cache_rpc_concurrency = <int>

default: 128

The number of concurrent requests allowed to the remote cache service.

`remote_cache_rpc_timeout_millis`

--remote-cache-rpc-timeout-millis=<int>
PANTS_REMOTE_CACHE_RPC_TIMEOUT_MILLIS

pants.toml
[GLOBAL]
remote_cache_rpc_timeout_millis = <int>

default: 1500

Timeout value for remote cache RPCs in milliseconds.

`remote_cache_warnings`

--remote-cache-warnings=<RemoteCacheWarningsBehavior>
PANTS_REMOTE_CACHE_WARNINGS

pants.toml
[GLOBAL]
remote_cache_warnings = <RemoteCacheWarningsBehavior>

one of: ignore, first_only, backoff, always
default: backoff

How frequently to log remote cache failures at the warn log level.

All errors not logged at the warn level will instead be logged at the debug level.

`remote_client_certs_path`

--remote-client-certs-path=<str>
PANTS_REMOTE_CLIENT_CERTS_PATH

pants.toml
[GLOBAL]
remote_client_certs_path = <str>

default: None

Path to a PEM file containing client certificates used for verifying secure connections to [GLOBAL].remote_execution_address and [GLOBAL].remote_store_address when using client authentication (mTLS).

If unspecified, will use regular TLS. Requires remote_client_key_path to also be specified.

`remote_client_key_path`

--remote-client-key-path=<str>
PANTS_REMOTE_CLIENT_KEY_PATH

pants.toml
[GLOBAL]
remote_client_key_path = <str>

default: None

Path to a PEM file containing a private key used for verifying secure connections to [GLOBAL].remote_execution_address and [GLOBAL].remote_store_address when using client authentication (mTLS).

If unspecified, will use regular TLS. Requires remote_client_certs_path to also be specified.

`remote_execution_address`

--remote-execution-address=<str>
PANTS_REMOTE_EXECUTION_ADDRESS

pants.toml
[GLOBAL]
remote_execution_address = <str>

default: None

The URI of a server/entity used as a remote execution scheduler. The supported URIs depends on the value of the remote_provider option.

You must also set [GLOBAL].remote_store_address, which will often be the same value.

`remote_execution_append_only_caches_base_path`

--remote-execution-append-only-caches-base-path=<str>
PANTS_REMOTE_EXECUTION_APPEND_ONLY_CACHES_BASE_PATH

pants.toml
[GLOBAL]
remote_execution_append_only_caches_base_path = <str>

default: None

Sets the base path to use when setting up an append-only cache for a process running remotely. If this option is not set, then append-only caches will not be used with remote execution. The option should be set to the absolute path of a writable directory in the remote execution environment where Pants can create append-only caches for use with remotely executing processes.

`remote_execution_extra_platform_properties`

--remote-execution-extra-platform-properties="['<str>', '<str>', ...]"
PANTS_REMOTE_EXECUTION_EXTRA_PLATFORM_PROPERTIES

pants.toml
[GLOBAL]
remote_execution_extra_platform_properties = [
    '<str>',
    '<str>',
    ...,
]

default: []

Platform properties to set on remote execution requests.

Format: property=value. Multiple values should be specified as multiple occurrences of this flag.

Pants itself may add additional platform properties.

If you are using the remote_environment target mechanism, set this value as a field on the target instead. This option will be ignored.

`remote_execution_headers`

--remote-execution-headers="{'key1': val1, 'key2': val2, ...}"
PANTS_REMOTE_EXECUTION_HEADERS

pants.toml
[GLOBAL.remote_execution_headers]
key1 = val1
key2 = val2
...

default: {}

Headers to set on remote execution requests. Format: header=value. Pants may add additional headers.

See [GLOBAL].remote_store_headers as well.

`remote_execution_overall_deadline_secs`

--remote-execution-overall-deadline-secs=<int>
PANTS_REMOTE_EXECUTION_OVERALL_DEADLINE_SECS

pants.toml
[GLOBAL]
remote_execution_overall_deadline_secs = <int>

default: 3600

Overall timeout in seconds for each remote execution request from time of submission

`remote_execution_rpc_concurrency`

--remote-execution-rpc-concurrency=<int>
PANTS_REMOTE_EXECUTION_RPC_CONCURRENCY

pants.toml
[GLOBAL]
remote_execution_rpc_concurrency = <int>

default: 128

The number of concurrent requests allowed to the remote execution service.

`remote_instance_name`

--remote-instance-name=<str>
PANTS_REMOTE_INSTANCE_NAME

pants.toml
[GLOBAL]
remote_instance_name = <str>

default: None

Name of the remote instance to use by remote caching and remote execution.

This is used by some remote servers for routing. Consult your remote server for whether this should be set.

You can also use a Pants plugin which provides remote authentication to dynamically set this value.

`remote_oauth_bearer_token`

--remote-oauth-bearer-token=<str>
PANTS_REMOTE_OAUTH_BEARER_TOKEN

pants.toml
[GLOBAL]
remote_oauth_bearer_token = <str>

default: None

An oauth token to use for gGRPC connections to [GLOBAL].remote_execution_address and [GLOBAL].remote_store_address.

If specified, Pants will add a header in the format authorization: Bearer <token>. You can also manually add this header via [GLOBAL].remote_execution_headers and [GLOBAL].remote_store_headers, or use [GLOBAL].remote_auth_plugin to provide a plugin to dynamically set the relevant headers. Otherwise, no authorization will be performed.

Recommendation: do not place a token directly in pants.toml, instead do one of: set the token via the environment variable (PANTS_REMOTE_OAUTH_BEARER_TOKEN), CLI option (--remote-oauth-bearer-token), or store the token in a file and set the option to "@/path/to/token.txt" to read the value from that file.

`remote_store_address`

--remote-store-address=<str>
PANTS_REMOTE_STORE_ADDRESS

pants.toml
[GLOBAL]
remote_store_address = <str>

default: None

The URI of a server/entity used as a remote file store. The supported URIs depends on the value of the remote_provider option.

`remote_store_batch_api_size_limit`

--remote-store-batch-api-size-limit=<int>
PANTS_REMOTE_STORE_BATCH_API_SIZE_LIMIT

pants.toml
[GLOBAL]
remote_store_batch_api_size_limit = <int>

default: 4194304

The maximum total size of blobs allowed to be sent in a single batch API call to the remote store.

`remote_store_chunk_bytes`

--remote-store-chunk-bytes=<int>
PANTS_REMOTE_STORE_CHUNK_BYTES

pants.toml
[GLOBAL]
remote_store_chunk_bytes = <int>

default: 1048576

Size in bytes of chunks transferred to/from the remote file store.

`remote_store_headers`

--remote-store-headers="{'key1': val1, 'key2': val2, ...}"
PANTS_REMOTE_STORE_HEADERS

pants.toml
[GLOBAL.remote_store_headers]
key1 = val1
key2 = val2
...

default: {}

Headers to set on remote store requests.

Format: header=value. Pants may add additional headers.

See [GLOBAL].remote_execution_headers as well.

`remote_store_rpc_concurrency`

--remote-store-rpc-concurrency=<int>
PANTS_REMOTE_STORE_RPC_CONCURRENCY

pants.toml
[GLOBAL]
remote_store_rpc_concurrency = <int>

default: 128

The number of concurrent requests allowed to the remote store service.

`remote_store_rpc_retries`

--remote-store-rpc-retries=<int>
PANTS_REMOTE_STORE_RPC_RETRIES

pants.toml
[GLOBAL]
remote_store_rpc_retries = <int>

default: 2

Number of times to retry any RPC to the remote store before giving up.

`remote_store_rpc_timeout_millis`

--remote-store-rpc-timeout-millis=<int>
PANTS_REMOTE_STORE_RPC_TIMEOUT_MILLIS

pants.toml
[GLOBAL]
remote_store_rpc_timeout_millis = <int>

default: 30000

Timeout value for remote store RPCs (not including streaming requests) in milliseconds.

`rule_threads_core`

--rule-threads-core=<int>
PANTS_RULE_THREADS_CORE

pants.toml
[GLOBAL]
rule_threads_core = <int>

default: max(2, #cores/2)

The number of threads to keep active and ready to execute @rule logic (see also: --rule-threads-max).

Values less than 2 are not currently supported.

This value is independent of the number of processes that may be spawned in parallel locally (controlled by --process-execution-local-parallelism).

`rule_threads_max`

--rule-threads-max=<int>
PANTS_RULE_THREADS_MAX

pants.toml
[GLOBAL]
rule_threads_max = <int>

default: None

The maximum number of threads to use to execute @rule logic. Defaults to a small multiple of --rule-threads-core.

`show_log_target`

--[no-]show-log-target
PANTS_SHOW_LOG_TARGET

pants.toml
[GLOBAL]
show_log_target = <bool>

default: False

Display the target where a log message originates in that log message's output. This can be helpful when paired with --log-levels-by-target.

`stats_record_option_scopes`

--stats-record-option-scopes="['<str>', '<str>', ...]"
PANTS_STATS_RECORD_OPTION_SCOPES

pants.toml
[GLOBAL]
stats_record_option_scopes = [
    '<str>',
    '<str>',
    ...,
]

default:

[
  "*"
]

Option scopes to record in stats on run completion. Options may be selected by joining the scope and the option with a ^ character, i.e. to get option pantsd in the GLOBAL scope, you'd pass GLOBAL^pantsd. Add a '*' to the list to capture all known scopes.

`streaming_workunits_complete_async`

--[no-]streaming-workunits-complete-async
PANTS_STREAMING_WORKUNITS_COMPLETE_ASYNC

pants.toml
[GLOBAL]
streaming_workunits_complete_async = <bool>

default: True

True if stats recording should be allowed to complete asynchronously when pantsd is enabled. When pantsd is disabled, stats recording is always synchronous. To reduce data loss, this flag defaults to false inside of containers, such as when run with Docker.

`streaming_workunits_level`

--streaming-workunits-level=<LogLevel>
PANTS_STREAMING_WORKUNITS_LEVEL

pants.toml
[GLOBAL]
streaming_workunits_level = <LogLevel>

one of: trace, debug, info, warn, error
default: debug

The level of workunits that will be reported to streaming workunit event receivers.

Workunits form a tree, and even when workunits are filtered out by this setting, the workunit tree structure will be preserved (by adjusting the parent pointers of the remaining workunits).

`streaming_workunits_report_interval`

--streaming-workunits-report-interval=<float>
PANTS_STREAMING_WORKUNITS_REPORT_INTERVAL

pants.toml
[GLOBAL]
streaming_workunits_report_interval = <float>

default: 1.0

Interval in seconds between when streaming workunit event receivers will be polled.

`subproject_roots`

--subproject-roots="['<str>', '<str>', ...]"
PANTS_SUBPROJECT_ROOTS

pants.toml
[GLOBAL]
subproject_roots = [
    '<str>',
    '<str>',
    ...,
]

default: []

Paths that correspond with build roots for any subproject that this project depends on.

`unmatched_build_file_globs`

--unmatched-build-file-globs=<GlobMatchErrorBehavior>
PANTS_UNMATCHED_BUILD_FILE_GLOBS

pants.toml
[GLOBAL]
unmatched_build_file_globs = <GlobMatchErrorBehavior>

one of: ignore, warn, error
default: warn

What to do when files and globs specified in BUILD files, such as in the sources field, cannot be found.

This usually happens when the files do not exist on your machine. It can also happen if they are ignored by the [GLOBAL].pants_ignore option, which causes the files to be invisible to Pants.

`unmatched_cli_globs`

--unmatched-cli-globs=<GlobMatchErrorBehavior>
PANTS_UNMATCHED_CLI_GLOBS

pants.toml
[GLOBAL]
unmatched_cli_globs = <GlobMatchErrorBehavior>

one of: ignore, warn, error
default: error

What to do when command line arguments, e.g. files and globs like dir::, cannot be found.

This usually happens when the files do not exist on your machine. It can also happen if they are ignored by the [GLOBAL].pants_ignore option, which causes the files to be invisible to Pants.

`verify_config`

--[no-]verify-config
PANTS_VERIFY_CONFIG

pants.toml
[GLOBAL]
verify_config = <bool>

default: True

Verify that all config file values correspond to known options.

`watch_filesystem`

--[no-]watch-filesystem
PANTS_WATCH_FILESYSTEM

pants.toml
[GLOBAL]
watch_filesystem = <bool>

default: True

Set to False if Pants should not watch the filesystem for changes. pantsd or loop may not be enabled.

Deprecated options

`allow_deprecated_macos_before_12`

--[no-]allow-deprecated-macos-before-12
PANTS_ALLOW_DEPRECATED_MACOS_BEFORE_12

pants.toml
[GLOBAL]
allow_deprecated_macos_before_12 = <bool>

default: False
Deprecated, will be removed in version: 2.26.0.dev0.
Upgrade your operating system or write `allow_deprecated_macos_versions = ["10", "11"]` instead.

Silence warnings about running Pants on macOS 10.15 - 11. In future versions, Pants will only be supported on macOS 12 and newer.

If you have questions or concerns about this, please reach out to us at https://www.pantsbuild.org/community/getting-help.

`native_options_validation`

--native-options-validation=<NativeOptionsValidation>
PANTS_NATIVE_OPTIONS_VALIDATION

pants.toml
[GLOBAL]
native_options_validation = <NativeOptionsValidation>

one of: ignore, warning, error
default: warning
Deprecated, will be removed in version: 2.26.0.dev0.
The legacy parser has been removed so this option has no effect.

Pants is switching its option parsing system from a legacy parser written in Python to a new one written in Rust.

The results of parsing a given option by each system should be identical. However during a transition period we will run both parsers and compare their results. This option controls how to report discrepancies that arise.

error: Discrepancies will cause Pants to exit.
warning: Discrepancies will be logged but Pants will continue.
ignore: A last resort to turn off this check entirely.

If you encounter discrepancies that are not easily resolvable, please reach out to us on Slack or file an issue: https://www.pantsbuild.org/community/getting-help.

The native parser will become the default in 2.23.x, and the legacy parser will be removed in 2.24.x. So it is imperative that we find out about any discrepancies during this transition period.

`process_cleanup`

--[no-]process-cleanup
PANTS_PROCESS_CLEANUP

pants.toml
[GLOBAL]
process_cleanup = <bool>

default: True
Deprecated, will be removed in version: 3.0.0.dev0.
Use the `keep_sandboxes` option instead.

If false, Pants will not clean up local directories used as chroots for running processes. Pants will log their location so that you can inspect the chroot, and run the __run.sh script to recreate the process using the same argv and environment variables used by Pants. This option is useful for debugging.

None

Basic options
Advanced options
Deprecated options
Related subsystems

Basic options​

colors​

concurrent​

dynamic_ui​

dynamic_ui_renderer​

keep_sandboxes​

level​

local_cache​

loop​

pantsd​

remote_cache_read​

remote_cache_write​

remote_execution​

remote_provider​

session_end_tasks_timeout​

spec_files​

tag​

Advanced options​

allow_deprecated_macos_versions​

backend_packages​

build_file_prelude_globs​

build_ignore​

build_patterns​

ca_certs_path​

cache_content_behavior​

docker_execution​

enable_target_origin_sources_blocks​

engine_visualize_to​

file_downloads_max_attempts​

file_downloads_retry_delay​

ignore_warnings​

local_execution_root_dir​

local_store_dir​

local_store_directories_max_size_bytes​

local_store_files_max_size_bytes​

local_store_processes_max_size_bytes​

local_store_shard_count​

log_levels_by_target​

log_show_rust_3rdparty​

logdir​

loop_max​

named_caches_dir​

pants_bin_name​

pants_config_files​

pants_distdir​

pants_ignore​

pants_ignore_use_gitignore​

pants_physical_workdir_base​

pants_subprocessdir​

pants_version​

pants_workdir​

pantsd_invalidation_globs​

pantsd_max_memory_usage​

pantsd_pailgun_port​

pantsd_timeout_when_multiple_invocations​

pantsrc​

pantsrc_files​

plugins​

plugins_force_resolve​

print_stacktrace​

process_execution_cache_namespace​

process_execution_graceful_shutdown_timeout​

process_execution_local_enable_nailgun​

process_execution_local_parallelism​

process_execution_remote_parallelism​

process_per_child_memory_usage​

process_total_child_memory_usage​

pythonpath​

remote_ca_certs_path​

remote_cache_rpc_concurrency​

remote_cache_rpc_timeout_millis​

remote_cache_warnings​

remote_client_certs_path​

remote_client_key_path​

remote_execution_address​

remote_execution_append_only_caches_base_path​

remote_execution_extra_platform_properties​

remote_execution_headers​

remote_execution_overall_deadline_secs​

remote_execution_rpc_concurrency​

Basic options

`colors`

`concurrent`

`dynamic_ui`

`dynamic_ui_renderer`

`keep_sandboxes`

`level`

`local_cache`

`loop`

`pantsd`

`remote_cache_read`

`remote_cache_write`

`remote_execution`

`remote_provider`

`session_end_tasks_timeout`

`spec_files`

`tag`

Advanced options

`allow_deprecated_macos_versions`

`backend_packages`

`build_file_prelude_globs`

`build_ignore`

`build_patterns`

`ca_certs_path`

`cache_content_behavior`

`docker_execution`

`enable_target_origin_sources_blocks`

`engine_visualize_to`

`file_downloads_max_attempts`

`file_downloads_retry_delay`

`ignore_warnings`

`local_execution_root_dir`

`local_store_dir`

`local_store_directories_max_size_bytes`

`local_store_files_max_size_bytes`

`local_store_processes_max_size_bytes`

`local_store_shard_count`

`log_levels_by_target`

`log_show_rust_3rdparty`

`logdir`

`loop_max`

`named_caches_dir`

`pants_bin_name`

`pants_config_files`

`pants_distdir`

`pants_ignore`

`pants_ignore_use_gitignore`

`pants_physical_workdir_base`

`pants_subprocessdir`

`pants_version`

`pants_workdir`

`pantsd_invalidation_globs`

`pantsd_max_memory_usage`

`pantsd_pailgun_port`

`pantsd_timeout_when_multiple_invocations`

`pantsrc`

`pantsrc_files`

`plugins`

`plugins_force_resolve`

`print_stacktrace`

`process_execution_cache_namespace`

`process_execution_graceful_shutdown_timeout`

`process_execution_local_enable_nailgun`

`process_execution_local_parallelism`

`process_execution_remote_parallelism`

`process_per_child_memory_usage`

`process_total_child_memory_usage`

`pythonpath`

`remote_ca_certs_path`

`remote_cache_rpc_concurrency`

`remote_cache_rpc_timeout_millis`

`remote_cache_warnings`

`remote_client_certs_path`

`remote_client_key_path`

`remote_execution_address`

`remote_execution_append_only_caches_base_path`

`remote_execution_extra_platform_properties`

`remote_execution_headers`

`remote_execution_overall_deadline_secs`

`remote_execution_rpc_concurrency`