Enum PreviewFeature 

#[repr(u64)]
pub enum PreviewFeature {
    PythonInstallDefault = 1,
    JsonOutput = 2,
    Pylock = 4,
    AddBounds = 8,
    PackageConflicts = 16,
    ExtraBuildDependencies = 32,
    DetectModuleConflicts = 64,
    FormatCommand = 128,
    NativeAuth = 256,
    S3Endpoint = 512,
    CacheSize = 1_024,
    CachePhysicalSpace = 2_048,
    InitProjectFlag = 4_096,
    WorkspaceMetadata = 8_192,
    WorkspaceDir = 16_384,
    WorkspaceList = 32_768,
    SbomExport = 65_536,
    AuthHelper = 131_072,
    DirectPublish = 262_144,
    TargetWorkspaceDiscovery = 524_288,
    MetadataJson = 1_048_576,
    GcsEndpoint = 2_097_152,
    AdjustUlimit = 4_194_304,
    SpecialCondaEnvNames = 8_388_608,
    RelocatableEnvsDefault = 16_777_216,
    PublishRequireNormalized = 33_554_432,
    AuditCommand = 67_108_864,
    ProjectDirectoryMustExist = 134_217_728,
    IndexExcludeNewer = 268_435_456,
    AzureEndpoint = 536_870_912,
    TomlBackwardsCompatibility = 1_073_741_824,
    MalwareCheck = 2_147_483_648,
    VenvSafeClear = 4_294_967_296,
    CheckCommand = 8_589_934_592,
    PackagedInit = 17_179_869_184,
    CentralizedProjectEnvs = 34_359_738_368,
    ToolInstallLocks = 68_719_476_736,
    WorkspaceListScripts = 137_438_953_472,
    NoDistutilsPatch = 274_877_906_944,
    IndexHashAlgorithm = 549_755_813_888,
    LockfileFormatCheck = 1_099_511_627_776,
    LockWithoutMetadata = 2_199_023_255_552,
}

Variants

PythonInstallDefault = 1

Allows installing python and python3 executables.

JsonOutput = 2

Allows --output-format json for various uv commands.

Pylock = 4

Allows installing from pylock.toml files.

AddBounds = 8

Allows configuring the default bounds for uv add invocations.

PackageConflicts = 16

Allows defining workspace conflicts at the package level.

ExtraBuildDependencies = 32

Allows specifying additional dependencies for package builds.

DetectModuleConflicts = 64

Warns when multiple packages would install conflicting Python modules into the same environment.

FormatCommand = 128

Allows using uv format.

NativeAuth = 256

Enables storage of credentials in a system-native location.

S3Endpoint = 512

Allows signing requests to configured S3-compatible endpoints.

CacheSize = 1_024

Allows using uv cache size.

CachePhysicalSpace = 2_048

Reports the physical disk space reclaimed by cache cleanup, accounting for hardlinks and copy-on-write clones.

InitProjectFlag = 4_096

Rejects the deprecated --project option in uv init.

WorkspaceMetadata = 8_192

Allows using uv workspace metadata.

WorkspaceDir = 16_384

Allows using uv workspace dir.

WorkspaceList = 32_768

Allows using uv workspace list.

SbomExport = 65_536

Allows using uv export --format=cyclonedx1.5.

AuthHelper = 131_072

Allows using uv auth helper as a credential helper for external tools.

DirectPublish = 262_144

Allows publishing directly to a package index.

TargetWorkspaceDiscovery = 524_288

Uses the directory containing a local uv run target, rather than the current working directory, as the starting point for project and workspace discovery. This feature takes effect before configuration is loaded.

MetadataJson = 1_048_576

Includes JSON metadata files in built wheels.

GcsEndpoint = 2_097_152

Allows signing requests to configured Google Cloud Storage endpoints.

AdjustUlimit = 4_194_304

On Unix, raises the process’s soft open-file limit at startup, up to the hard limit.

SpecialCondaEnvNames = 8_388_608

Stops treating Conda environments named base or root as special.

RelocatableEnvsDefault = 16_777_216

Creates relocatable virtual environments by default.

PublishRequireNormalized = 33_554_432

Requires normalized distribution filenames when publishing, skipping files whose names are not normalized.

AuditCommand = 67_108_864

Allows using uv audit and uv tool audit.

ProjectDirectoryMustExist = 134_217_728

Rejects an invalid --project path instead of warning and continuing. Except for uv init, the path must already exist as a directory or point to a pyproject.toml file. This feature takes effect before configuration is loaded.

IndexExcludeNewer = 268_435_456

Allows setting exclude-newer on configured package indexes.

AzureEndpoint = 536_870_912

Allows signing requests to Azure Blob Storage endpoints with Azure credentials.

TomlBackwardsCompatibility = 1_073_741_824

Rewrites pyproject.toml as TOML 1.0 when building source distributions, preserving the original as pyproject.toml.orig to ensure compatibility with older build tools.

MalwareCheck = 2_147_483_648

Allows uv sync and other commands to check for malware using OSV before installing packages.

VenvSafeClear = 4_294_967_296

Prevents uv venv --clear from clearing a directory that does not contain a pyvenv.cfg file unless --force is provided.

CheckCommand = 8_589_934_592

Allows using uv check.

PackagedInit = 17_179_869_184

Makes uv init create a packaged application with a src/ layout, build system, and script entry point by default.

CentralizedProjectEnvs = 34_359_738_368

Stores project virtual environments in the uv cache.

ToolInstallLocks = 68_719_476_736

Stores a uv.lock alongside each installed tool and reuses it for reproducible installations, upgrades, and audits.

WorkspaceListScripts = 137_438_953_472

Allows using uv workspace list --scripts.

NoDistutilsPatch = 274_877_906_944

Stops installing the _virtualenv.py / _virtualenv.pth distutils configuration monkeypatch in virtual environments for Python 3.10 and later.

IndexHashAlgorithm = 549_755_813_888

Allows requiring a hash algorithm for configured package indexes.

LockfileFormatCheck = 1_099_511_627_776

Rejects non-canonical lockfile formatting when using --locked or --check.

LockWithoutMetadata = 2_199_023_255_552

Omit package.metadata from uv.lock.

Implementations

impl PreviewFeature

pub const fn metadata() -> &'static [(Self, &'static str, &'static [&'static str])]

Returns each enum variant, its documentation, and its aliases.

Trait Implementations

impl BitAnd for PreviewFeature

type Output = BitFlags<PreviewFeature>

The resulting type after applying the & operator.

fn bitand(self, other: Self) -> Self::Output

Performs the & operation.

impl BitFlag for PreviewFeature

fn empty() -> BitFlags<Self>

Create a BitFlags with no flags set (in other words, with a value of 0).

fn all() -> BitFlags<Self>

Create a BitFlags with all flags set.

fn from_bits(bits: Self::Numeric) -> Result<BitFlags<Self>, FromBitsError<Self>>

Create a BitFlags if the raw value provided does not contain any illegal flags.

fn from_bits_truncate(bits: Self::Numeric) -> BitFlags<Self>

Create a BitFlags from an underlying bitwise value. If any invalid bits are set, ignore them.

unsafe fn from_bits_unchecked(bits: Self::Numeric) -> BitFlags<Self>

Create a BitFlags unsafely, without checking if the bits form a valid bit pattern for the type.

impl BitOr for PreviewFeature

type Output = BitFlags<PreviewFeature>

The resulting type after applying the | operator.

fn bitor(self, other: Self) -> Self::Output

Performs the | operation.

impl BitXor for PreviewFeature

type Output = BitFlags<PreviewFeature>

The resulting type after applying the ^ operator.

fn bitxor(self, other: Self) -> Self::Output

Performs the ^ operation.

impl Clone for PreviewFeature

fn clone(&self) -> PreviewFeature

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PreviewFeature

impl Debug for PreviewFeature

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for PreviewFeature

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for PreviewFeature

impl FromStr for PreviewFeature

type Err = PreviewFeatureParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Not for PreviewFeature

type Output = BitFlags<PreviewFeature>

The resulting type after applying the ! operator.

fn not(self) -> Self::Output

Performs the unary ! operation.

impl PartialEq for PreviewFeature

fn eq(&self, other: &PreviewFeature) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl RawBitFlags for PreviewFeature

const EMPTY: <Self as RawBitFlags>::Numeric = 0

A value with no bits set.

const DEFAULT: <Self as RawBitFlags>::Numeric = 0

The value used by the Default implementation. Equivalent to EMPTY, unless customized.

const ALL_BITS: <Self as RawBitFlags>::Numeric

A value with all flag bits set.

const BITFLAGS_TYPE_NAME: &'static str = "BitFlags<PreviewFeature>"

The name of the type for debug formatting purposes.

type Numeric = u64

The underlying integer type.

fn bits(self) -> <Self as RawBitFlags>::Numeric

Return the bits as a number type.

impl StructuralPartialEq for PreviewFeature