gix-features 0.39.1

A crate to integrate various capabilities using compile-time feature flags
Documentation 
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lints.workspace = true

[package]
name = "gix-features"
description = "A crate to integrate various capabilities using compile-time feature flags"
repository = "https://github.com/GitoxideLabs/gitoxide"
version = "0.39.1"
authors = ["Sebastian Thiel <sebastian.thiel@icloud.com>"]
license = "MIT OR Apache-2.0"
edition = "2021"
rust-version = "1.65"
include = ["src/**/*", "LICENSE-*"]

[lib]
doctest = false
test = false

[features]

default = []
## Provide traits and utilities for providing progress information. These can then be rendered
## using facilities of the `prodash` crate.
progress = ["prodash"]
## Provide human-readable numbers as well as easier to read byte units for progress bars.
progress-unit-human-numbers = ["prodash?/unit-human"]
## Provide human readable byte units for progress bars.
progress-unit-bytes = ["dep:bytesize", "prodash?/unit-bytes"]

## If set, walkdir iterators will be multi-threaded.
fs-walkdir-parallel = ["dep:jwalk", "dep:gix-utils"]

## Provide utilities suitable for working with the `std::fs::read_dir()`.
fs-read-dir = ["dep:gix-utils"]

## Implement `tracing` with `tracing-core`, which provides applications with valuable performance details if they opt-in to it.
##
## Note that this may have overhead as well, thus instrumentations should be used stategically, only providing coarse tracing by default and adding details
## only where needed while marking them with the appropriate level.
tracing = ["gix-trace/tracing"]

## If enabled, detailed tracing is also emitted, which can greatly increase insights but at a cost.
tracing-detail = ["gix-trace/tracing-detail"]

## Use scoped threads and channels to parallelize common workloads on multiple objects. If enabled, it is used everywhere
## where it makes sense.
## As caches are likely to be used and instantiated per thread, more memory will be used on top of the costs for threads.
## The `threading` module will contain thread-safe primitives for shared ownership and mutation, otherwise these will be their single threaded counterparts.
## This way, single-threaded applications don't have to pay for threaded primitives.
parallel = ["dep:crossbeam-channel",
    "dep:parking_lot"]
## If enabled, OnceCell will be made available for interior mutability either in sync or unsync forms.
once_cell = ["dep:once_cell"]
## Makes facilities of the `walkdir` crate partially available.
## In conjunction with the **parallel** feature, directory walking will be parallel instead behind a compatible interface.
walkdir = ["dep:walkdir", "dep:gix-utils"]
#* an in-memory unidirectional pipe using `bytes` as efficient transfer mechanism.
io-pipe = ["dep:bytes"]
## provide a proven and fast `crc32` implementation.
crc32 = ["dep:crc32fast"]

#! ### Mutually Exclusive ZLIB

## Enable the usage of zlib related utilities to compress or decompress data.
## The base `zlib` feature uses the `flate2` Rust crate; the other mutually exclusive features select the `flate2 backend.
## Note that a competitive Zlib implementation is critical to `gitoxide's` object database performance.
## Enabling this without enabling one of the other features below will use a low-performance pure-Rust backend.
zlib = ["dep:flate2", "flate2?/rust_backend", "dep:thiserror"]
## Use the C-based zlib-ng backend, which can compress and decompress significantly faster.
zlib-ng = ["zlib", "flate2?/zlib-ng"]
## Use zlib-ng via its zlib-compat API. Useful if you already need zlib for C
## code elsewhere in your dependencies. Otherwise, use zlib-ng.
zlib-ng-compat = ["zlib", "flate2?/zlib-ng-compat"]
## Use a slower C-based backend which can compress and decompress significantly faster than the rust version.
## Unlike `zlib-ng-compat`, this allows using dynamic linking with system `zlib` libraries and doesn't require cmake.
zlib-stock = ["zlib", "flate2?/zlib"]
## Pure Rust backend, available for completeness even though it's the default
## if neither of the above options are set. Low performance, but pure Rust, so it
## may build in environments where other backends don't.
zlib-rust-backend = ["zlib", "flate2?/rust_backend"]

#! ### Mutually Exclusive SHA1
## A fast SHA1 implementation is critical to `gitoxide's` object database performance
## A multi-crate implementation that can use hardware acceleration, thus bearing the potential for up to 2Gb/s throughput on
## CPUs that support it, like AMD Ryzen or Intel Core i3, as well as Apple Silicon like M1.
## Takes precedence over `rustsha1` if both are specified.
fast-sha1 = ["dep:sha1"]
## A standard and well performing pure Rust implementation of Sha1. Will significantly slow down various git operations.
rustsha1 = ["dep:sha1_smol"]

#! ### Other

## Count cache hits and misses and print that debug information on drop.
## Caches implement this by default, which costs nothing unless this feature is enabled
cache-efficiency-debug = []

[[test]]
name = "hash"
path = "tests/hash.rs"
required-features = ["rustsha1"]

[[test]]
name = "parallel"
path = "tests/parallel_threaded.rs"
required-features = ["parallel", "rustsha1"]

[[test]]
name = "multi-threaded"
path = "tests/parallel_shared_threaded.rs"
required-features = ["parallel", "rustsha1"]

[[test]]
name = "single-threaded"
path = "tests/parallel_shared.rs"
required-features = ["rustsha1"]

[[test]]
name = "pipe"
path = "tests/pipe.rs"
required-features = ["io-pipe"]

[dependencies]
gix-hash = { version = "^0.15.1", path = "../gix-hash" }
gix-trace = { version = "^0.1.11", path = "../gix-trace" }

# for walkdir
gix-utils = { version = "^0.1.13", path = "../gix-utils", optional = true }

# 'parallel' feature
crossbeam-channel = { version = "0.5.0", optional = true }
parking_lot = { version = "0.12.0", default-features = false, optional = true }

jwalk = { version = "0.8.1", optional = true }
walkdir = { version = "2.3.2", optional = true } # used when parallel is off

# hashing and 'fast-sha1' feature
sha1_smol = { version = "1.0.0", optional = true }
crc32fast = { version = "1.2.1", optional = true }
sha1 = { version = "0.10.0", optional = true }

# progress
prodash = { version = "29.0.0", optional = true }
bytesize = { version = "1.0.1", optional = true }

# pipe
bytes = { version = "1.0.0", optional = true }

# zlib module
flate2 = { version = "1.0.33", optional = true, default-features = false }
thiserror = { version = "2.0.0", optional = true }

once_cell = { version = "1.13.0", optional = true }

document-features = { version = "0.2.0", optional = true }

[target.'cfg(unix)'.dependencies]
libc = { version = "0.2.119" }

[dev-dependencies]
bstr = { version = "1.3.0", default-features = false }


# Assembly doesn't yet compile on MSVC on windows, but does on GNU, see https://github.com/RustCrypto/asm-hashes/issues/17
# At this time, only aarch64, x86 and x86_64 are supported.
[target.'cfg(all(any(target_arch = "aarch64", target_arch = "x86", target_arch = "x86_64"), not(target_os = "windows")))'.dependencies]
sha1 = { version = "0.10.0", optional = true, features = ["asm"] }

[package.metadata.docs.rs]
all-features = true
features = ["document-features"]