devela/sys/env/env.rs
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// devela::sys::env::env
//
//! A namespaced wrapper for std
//
// NOTES:
// - The lists of expected values for configuration flags can be copied from:
// https://github.com/rust-lang/rust/blob/master/tests/ui/check-cfg/well-known-values.stderr
// - Afterwards they can be procesed with vim commands similar to:
// s/`//g
// s/, /\r/g
// s/\([a-z0-9_.]\+\)/#[cfg(target_arch = "\1")]\r{ "\1" }/
// s/\([a-z0-9_.]\+\)/target_arch = "\1",/
#[cfg(feature = "std")]
use crate::{IoResult, OsStr, OsString, Path, PathBuf, _dep::_std::env::*};
/// A namespaced wrapper for `std::env` functions and constants.
pub struct Env;
impl Env {}
/// # Functions related to command line arguments
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
impl Env {
/// Returns the arguments that this program was started with.
///
/// See [args].
pub fn args() -> Args {
args()
}
/// See [args_os].
pub fn args_os() -> ArgsOs {
args_os()
}
}
/// # Functions related to environment variables
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
impl Env {
/// Fetches the environment variable key from the current process.
///
/// See [var].
pub fn var<K: AsRef<OsStr>>(key: K) -> Result<String, VarError> {
var(key)
}
/// Returns an iterator of (variable, value) pairs of strings,
/// for all the environment variables of the current process.
///
/// See [vars].
pub fn vars() -> Vars {
vars()
}
/// Fetches the environment variable key from the current process.
///
/// See [var_os].
pub fn var_os<K: AsRef<OsStr>>(key: K) -> Option<OsString> {
var_os(key)
}
/// Returns an iterator of (variable, value) pairs of OS strings,
/// for all the environment variables of the current process.
///
/// See [vars_os].
pub fn vars_os() -> VarsOs {
vars_os()
}
/// Removes the environment variable `key` from the environment
/// of the currently running process.
///
/// # Safety
/// See [remove_var].
#[cfg(all(not(feature = "safe_sys"), feature = "unsafe_thread"))]
pub unsafe fn remove_var<K: AsRef<OsStr>>(key: K) {
unsafe { remove_var(key) }
}
/// Sets the environment variable `key` to the value `value`
/// for the currently running process.
///
/// # Safety
/// See [set_var].
#[cfg(all(not(feature = "safe_sys"), feature = "unsafe_thread"))]
pub unsafe fn set_var<K: AsRef<OsStr>, V: AsRef<OsStr>>(key: K, value: V) {
unsafe { set_var(key, value) }
}
}
/// # Functions related to paths.
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
impl Env {
/// Returns the full filesystem path of the current running executable.
///
/// See [current_exe].
pub fn current_exe() -> IoResult<PathBuf> {
current_exe()
}
/// Returns the current working directory.
///
/// See [current_dir].
pub fn current_dir() -> IoResult<PathBuf> {
current_dir()
}
/// Changes the current working directory to the specified path.
///
/// See [set_current_dir].
pub fn set_current_dir<P: AsRef<Path>>(path: P) -> IoResult<()> {
set_current_dir(path)
}
/// Returns the path of a temporary directory.
///
/// See [temp_dir].
pub fn temp_dir() -> PathBuf {
temp_dir()
}
/// Joins a collection of [Path]s appropriately for the `PATH` environment variable.
///
/// See [join_paths].
pub fn join_paths<I, T>(paths: I) -> Result<OsString, JoinPathsError>
where
I: IntoIterator<Item = T>,
T: AsRef<OsStr>,
{
join_paths(paths)
}
/// Parses input according to platform conventions for the `PATH` environment variable.
///
/// See [split_paths].
pub fn split_paths<T: AsRef<OsStr> + ?Sized>(unparsed: &T) -> SplitPaths<'_> {
split_paths(unparsed)
}
}
/// # Constants
impl Env {
/// A string describing the architecture of the CPU that is currently in use.
///
/// Expected values are:
/// `aarch64`, `arm`, `arm64ec`, `avr`, `bpf`, `csky`, `hexagon`, `loongarch64`, `m68k`, `mips`, `mips32r6`, `mips64`, `mips64r6`, `msp430`, `nvptx64`, `powerpc`, `powerpc64`, `riscv32`, `riscv64`, `s390x`, `sparc`, `sparc64`, `wasm32`, `wasm64`, `x86`, `x86_64`, and `xtensa`.
#[rustfmt::skip]
pub const ARCH: &'static str = {
#[cfg(feature = "std")]
{ std::env::consts::ARCH }
#[cfg(not(feature = "std"))]
{ // 27 arches:
#[cfg(target_arch = "aarch64")]
{ "aarch64" }
#[cfg(target_arch = "arm")]
{ "arm" }
#[cfg(target_arch = "arm64ec")]
{ "arm64ec" }
#[cfg(target_arch = "avr")]
{ "avr" }
#[cfg(target_arch = "bpf")]
{ "bpf" }
#[cfg(target_arch = "csky")]
{ "csky" }
#[cfg(target_arch = "hexagon")]
{ "hexagon" }
#[cfg(target_arch = "loongarch64")]
{ "loongarch64" }
#[cfg(target_arch = "m68k")]
{ "m68k" }
#[cfg(target_arch = "mips")]
{ "mips" }
#[cfg(target_arch = "mips32r6")]
{ "mips32r6" }
#[cfg(target_arch = "mips64")]
{ "mips64" }
#[cfg(target_arch = "mips64r6")]
{ "mips64r6" }
#[cfg(target_arch = "msp430")]
{ "msp430" }
#[cfg(target_arch = "nvptx64")]
{ "nvptx64" }
#[cfg(target_arch = "powerpc")]
{ "powerpc" }
#[cfg(target_arch = "powerpc64")]
{ "powerpc64" }
#[cfg(target_arch = "riscv32")]
{ "riscv32" }
#[cfg(target_arch = "riscv64")]
{ "riscv64" }
#[cfg(target_arch = "s390x")]
{ "s390x" }
#[cfg(target_arch = "sparc")]
{ "sparc" }
#[cfg(target_arch = "sparc64")]
{ "sparc64" }
#[cfg(target_arch = "wasm32")]
{ "wasm32" }
#[cfg(target_arch = "wasm64")]
{ "wasm64" }
#[cfg(target_arch = "x86")]
{ "x86" }
#[cfg(target_arch = "x86_64")]
{ "x86_64" }
#[cfg(target_arch = "xtensa")]
{ "xtensa" }
#[cfg(not(any(
target_arch = "aarch64",
target_arch = "arm",
target_arch = "arm64ec",
target_arch = "avr",
target_arch = "bpf",
target_arch = "csky",
target_arch = "hexagon",
target_arch = "loongarch64",
target_arch = "m68k",
target_arch = "mips",
target_arch = "mips32r6",
target_arch = "mips64",
target_arch = "mips64r6",
target_arch = "msp430",
target_arch = "nvptx64",
target_arch = "powerpc",
target_arch = "powerpc64",
target_arch = "riscv32",
target_arch = "riscv64",
target_arch = "s390x",
target_arch = "sparc",
target_arch = "sparc64",
target_arch = "wasm32",
target_arch = "wasm64",
target_arch = "x86",
target_arch = "x86_64",
target_arch = "xtensa",
)))]
{ "unknown" }
}
};
/// The family of the operating system.
///
/// The expected values are: `unix`, `wasm`, and `windows`
#[rustfmt::skip]
pub const FAMILY: &'static str = {
#[cfg(feature = "std")]
{ std::env::consts::FAMILY }
#[cfg(not(feature = "std"))]
{
#[cfg(target_family = "unix")]
{ "unix" }
#[cfg(target_family = "wasm")]
{ "wasm" }
#[cfg(target_family = "windows")]
{ "windows" }
#[cfg(not(any(
target_family = "unix",
target_family = "wasm",
target_family = "windows",
)))]
{ "unknown" }
}
};
/// A string describing the vendor of the CPU that is currently in use.
///
/// Expected values are:
/// `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`.
#[rustfmt::skip]
pub const VENDOR: &'static str = { // 15 vendors
#[cfg(target_vendor = "apple")]
{ "apple" }
#[cfg(target_vendor = "espressif")]
{ "espressif" }
#[cfg(target_vendor = "fortanix")]
{ "fortanix" }
#[cfg(target_vendor = "ibm")]
{ "ibm" }
#[cfg(target_vendor = "kmc")]
{ "kmc" }
#[cfg(target_vendor = "nintendo")]
{ "nintendo" }
#[cfg(target_vendor = "nvidia")]
{ "nvidia" }
#[cfg(target_vendor = "pc")]
{ "pc" }
#[cfg(target_vendor = "risc0")]
{ "risc0" }
#[cfg(target_vendor = "sony")]
{ "sony" }
#[cfg(target_vendor = "sun")]
{ "sun" }
#[cfg(target_vendor = "unikraft")]
{ "unikraft" }
#[cfg(target_vendor = "uwp")]
{ "uwp" }
#[cfg(target_vendor = "win7")]
{ "win7" }
#[cfg(target_vendor = "wrs")]
{ "wrs" }
#[cfg(not(any(
target_vendor = "apple",
target_vendor = "espressif",
target_vendor = "fortanix",
target_vendor = "ibm",
target_vendor = "kmc",
target_vendor = "nintendo",
target_vendor = "nvidia",
target_vendor = "pc",
target_vendor = "risc0",
target_vendor = "sony",
target_vendor = "sun",
target_vendor = "unikraft",
target_vendor = "uwp",
target_vendor = "win7",
target_vendor = "wrs",
)))]
{ "unknown" }
};
/// A string describing the specific operating system in use.
///
/// The expected values are:
/// `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm`.
#[rustfmt::skip]
pub const OS: &'static str = {
#[cfg(feature = "std")]
{ std::env::consts::OS }
#[cfg(not(feature = "std"))]
{ // 40 oses:
#[cfg(target_os = "aix")]
{ "aix" }
#[cfg(target_os = "android")]
{ "android" }
#[cfg(target_os = "cuda")]
{ "cuda" }
#[cfg(target_os = "dragonfly")]
{ "dragonfly" }
#[cfg(target_os = "emscripten")]
{ "emscripten" }
#[cfg(target_os = "espidf")]
{ "espidf" }
#[cfg(target_os = "freebsd")]
{ "freebsd" }
#[cfg(target_os = "fuchsia")]
{ "fuchsia" }
#[cfg(target_os = "haiku")]
{ "haiku" }
#[cfg(target_os = "hermit")]
{ "hermit" }
#[cfg(target_os = "horizon")]
{ "horizon" }
#[cfg(target_os = "hurd")]
{ "hurd" }
#[cfg(target_os = "illumos")]
{ "illumos" }
#[cfg(target_os = "ios")]
{ "ios" }
#[cfg(target_os = "l4re")]
{ "l4re" }
#[cfg(target_os = "linux")]
{ "linux" }
#[cfg(target_os = "macos")]
{ "macos" }
#[cfg(target_os = "netbsd")]
{ "netbsd" }
#[cfg(target_os = "none")]
{ "none" }
#[cfg(target_os = "nto")]
{ "nto" }
#[cfg(target_os = "nuttx")]
{ "nuttx" }
#[cfg(target_os = "openbsd")]
{ "openbsd" }
#[cfg(target_os = "psp")]
{ "psp" }
// WAIT: 1.84
// #[cfg(target_os = "psx")]
// { "psx" }
#[cfg(target_os = "redox")]
{ "redox" }
#[cfg(target_os = "rtems")]
{ "rtems" }
#[cfg(target_os = "solaris")]
{ "solaris" }
#[cfg(target_os = "solid_asp3")]
{ "solid_asp3" }
#[cfg(target_os = "teeos")]
{ "teeos" }
#[cfg(target_os = "trusty")]
{ "trusty" }
#[cfg(target_os = "tvos")]
{ "tvos" }
#[cfg(target_os = "uefi")]
{ "uefi" }
#[cfg(target_os = "unknown")]
{ "unknown" }
#[cfg(target_os = "visionos")]
{ "visionos" }
#[cfg(target_os = "vita")]
{ "vita" }
#[cfg(target_os = "vxworks")]
{ "vxworks" }
#[cfg(target_os = "wasi")]
{ "wasi" }
#[cfg(target_os = "watchos")]
{ "watchos" }
#[cfg(target_os = "windows")]
{ "windows" }
#[cfg(target_os = "xous")]
{ "xous" }
#[cfg(target_os = "zkvm")]
{ "zkvm" }
#[cfg(not(any(
target_os = "aix",
target_os = "android",
target_os = "cuda",
target_os = "dragonfly",
target_os = "emscripten",
target_os = "espidf",
target_os = "freebsd",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hermit",
target_os = "horizon",
target_os = "hurd",
target_os = "illumos",
target_os = "ios",
target_os = "l4re",
target_os = "linux",
target_os = "macos",
target_os = "netbsd",
target_os = "none",
target_os = "nto",
target_os = "nuttx",
target_os = "openbsd",
target_os = "psp",
// WAIT: 1.84
// target_os = "psx",
target_os = "redox",
target_os = "rtems",
target_os = "solaris",
target_os = "solid_asp3",
target_os = "teeos",
target_os = "trusty",
target_os = "tvos",
target_os = "uefi",
target_os = "unknown",
target_os = "visionos",
target_os = "vita",
target_os = "vxworks",
target_os = "wasi",
target_os = "watchos",
target_os = "windows",
target_os = "xous",
target_os = "zkvm",
)))]
{ "unknown" }
}
};
/// Specifies the file extension used for shared libraries on this platform
/// that goes after the dot.
///
/// Some possible values:
/// - so
/// - dylib
/// - dll
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
pub const DLL_EXTENSION: &'static str = std::env::consts::DLL_EXTENSION;
/// Specifies the filename prefix used for shared libraries on this platform.
///
/// Some possible values:
/// - lib
/// - "" (an empty string)
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
pub const DLL_PREFIX: &'static str = std::env::consts::DLL_PREFIX;
/// Specifies the filename suffix used for shared libraries on this platform.
///
/// Some possible values:
/// - .so
/// - .dylib
/// - .dll
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
pub const DLL_SUFFIX: &'static str = std::env::consts::DLL_SUFFIX;
/// Specifies the file extension, if any, used for executable binaries on this platform.
///
/// Some possible values:
/// - exe
/// - "" (an empty string)
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
pub const EXE_EXTENSION: &'static str = std::env::consts::EXE_EXTENSION;
/// Specifies the filename suffix used for executable binaries on this platform.
///
/// Some possible values:
/// - .exe
/// - .nexe
/// - .pexe
/// - "" (an empty string)
#[cfg(feature = "std")]
#[cfg_attr(feature = "nightly_doc", doc(cfg(feature = "std")))]
pub const EXE_SUFFIX: &'static str = std::env::consts::EXE_SUFFIX;
}