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These are the flags/commands under buck2 uquery and their --help output:

buck uquery

Perform queries on the unconfigured target graph

The unconfigured target graph consists of the targets as they are
defined in the build files. In this graph, each target appears
exactly once and `select()`s are in the unresolved form. For large
queries, the unconfigured graph may be much smaller than the
configured graph and queries can be much more efficiently performed

When querying the unconfigured graph, dependencies appearing in all
branches of `select()` dictionaries will be treated as dependencies.

Run `buck2 docs uquery` or
for more documentation about the functions available in uquery


Print all the attributes of a target

`buck2 uquery //java/com/example/app:amazing --output-all-attributes

List the deps of a target (special characters in a target will require quotes):
`buck2 uquery 'deps("//java/com/example/app:amazing+more")'`

select() encoding:

When printed, values with `select()`s use a special json encoding.

`1 + select({"//:a": 1, "DEFAULT": 2})` will be encoded as:

`{"__type": "concat", "items": [1, {"__type": "selector", "entries": {"//:a": 1, "DEFAULT": 2}}]}`

Usage: buck2-release uquery [OPTIONS] <QUERY> [QUERY_ARGS]...

the query to evaluate

list of literals for a multi-query (one containing `%s` or `%Ss`)

-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.

Output in JSON format

Output in Graphviz Dot format

Output in a more compact format than Graphviz Dot

--output-format <dot|dot_compact|json|starlark>
Output format (default: list).

dot - dot graph format.

dot_compact - compact alternative to dot format.

json - JSON format.

starlark - targets are printed like starlark code that would produce them.

[possible values: dot, json, dot_compact, starlark]

--modifier <VALUE>
This option is not used

-h, --help
Print help (see a summary with '-h')

Buckconfig Options:
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)

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.

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

[possible values: never, always, ondifferentstate]

Starlark Options:
Disable runtime type checking in Starlark interpreter.

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

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

[default: auto]
[possible values: simple, simplenotty, simpletty, super, auto, none]

--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

Disable console interactions


Event Log Options:
--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

Universal Options:
-v, --verbose <VERBOSITY>
How verbose buck should be while logging.

Values: 0 = Quiet, errors only; 1 = Show status. Default; 2 = more info about errors; 3 =
more info about everything; 4 = more info about everything + stderr;

It can be combined with specific log items (stderr, full_failed_command, commands,
actions, status, stats, success) to fine-tune the verbosity of the log. Example usage

[default: 1]

--oncall <ONCALL>
The oncall executing this command

--client-metadata <CLIENT_METADATA>
Metadata key-value pairs to inject into Buck2's logging. Client metadata must be of the
form `key=value`, where `key` is a snake_case identifier, and will be sent to backend