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use crate::ffi::OsStr;
use crate::fmt;
use crate::io;
use crate::marker::PhantomData;
use crate::num::NonZeroI32;
use crate::path::Path;
use crate::sys::fs::File;
use crate::sys::pipe::AnonPipe;
use crate::sys::unsupported;
use crate::sys_common::process::{CommandEnv, CommandEnvs};
pub use crate::ffi::OsString as EnvKey;
////////////////////////////////////////////////////////////////////////////////
// Command
////////////////////////////////////////////////////////////////////////////////
pub struct Command {
env: CommandEnv,
}
// passed back to std::process with the pipes connected to the child, if any
// were requested
pub struct StdioPipes {
pub stdin: Option<AnonPipe>,
pub stdout: Option<AnonPipe>,
pub stderr: Option<AnonPipe>,
}
// FIXME: This should be a unit struct, so we can always construct it
// The value here should be never used, since we cannot spawn processes.
pub enum Stdio {
Inherit,
Null,
MakePipe,
}
impl Command {
pub fn new(_program: &OsStr) -> Command {
Command { env: Default::default() }
}
pub fn arg(&mut self, _arg: &OsStr) {}
pub fn env_mut(&mut self) -> &mut CommandEnv {
&mut self.env
}
pub fn cwd(&mut self, _dir: &OsStr) {}
pub fn stdin(&mut self, _stdin: Stdio) {}
pub fn stdout(&mut self, _stdout: Stdio) {}
pub fn stderr(&mut self, _stderr: Stdio) {}
pub fn get_program(&self) -> &OsStr {
panic!("unsupported")
}
pub fn get_args(&self) -> CommandArgs<'_> {
CommandArgs { _p: PhantomData }
}
pub fn get_envs(&self) -> CommandEnvs<'_> {
self.env.iter()
}
pub fn get_current_dir(&self) -> Option<&Path> {
None
}
pub fn spawn(
&mut self,
_default: Stdio,
_needs_stdin: bool,
) -> io::Result<(Process, StdioPipes)> {
unsupported()
}
pub fn output(&mut self) -> io::Result<(ExitStatus, Vec<u8>, Vec<u8>)> {
unsupported()
}
}
impl From<AnonPipe> for Stdio {
fn from(pipe: AnonPipe) -> Stdio {
pipe.diverge()
}
}
impl From<io::Stdout> for Stdio {
fn from(_: io::Stdout) -> Stdio {
// FIXME: This is wrong.
// Instead, the Stdio we have here should be a unit struct.
panic!("unsupported")
}
}
impl From<io::Stderr> for Stdio {
fn from(_: io::Stderr) -> Stdio {
// FIXME: This is wrong.
// Instead, the Stdio we have here should be a unit struct.
panic!("unsupported")
}
}
impl From<File> for Stdio {
fn from(_file: File) -> Stdio {
// FIXME: This is wrong.
// Instead, the Stdio we have here should be a unit struct.
panic!("unsupported")
}
}
impl fmt::Debug for Command {
fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
Ok(())
}
}
#[derive(PartialEq, Eq, Clone, Copy, Debug, Default)]
#[non_exhaustive]
pub struct ExitStatus();
impl ExitStatus {
pub fn exit_ok(&self) -> Result<(), ExitStatusError> {
Ok(())
}
pub fn code(&self) -> Option<i32> {
Some(0)
}
}
impl fmt::Display for ExitStatus {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "<dummy exit status>")
}
}
pub struct ExitStatusError(!);
impl Clone for ExitStatusError {
fn clone(&self) -> ExitStatusError {
self.0
}
}
impl Copy for ExitStatusError {}
impl PartialEq for ExitStatusError {
fn eq(&self, _other: &ExitStatusError) -> bool {
self.0
}
}
impl Eq for ExitStatusError {}
impl fmt::Debug for ExitStatusError {
fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0
}
}
impl Into<ExitStatus> for ExitStatusError {
fn into(self) -> ExitStatus {
self.0
}
}
impl ExitStatusError {
pub fn code(self) -> Option<NonZeroI32> {
self.0
}
}
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
pub struct ExitCode(bool);
impl ExitCode {
pub const SUCCESS: ExitCode = ExitCode(false);
pub const FAILURE: ExitCode = ExitCode(true);
pub fn as_i32(&self) -> i32 {
self.0 as i32
}
}
impl From<u8> for ExitCode {
fn from(code: u8) -> Self {
match code {
0 => Self::SUCCESS,
1..=255 => Self::FAILURE,
}
}
}
pub struct Process(!);
impl Process {
pub fn id(&self) -> u32 {
self.0
}
pub fn kill(&mut self) -> io::Result<()> {
self.0
}
pub fn wait(&mut self) -> io::Result<ExitStatus> {
self.0
}
pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> {
self.0
}
}
pub struct CommandArgs<'a> {
_p: PhantomData<&'a ()>,
}
impl<'a> Iterator for CommandArgs<'a> {
type Item = &'a OsStr;
fn next(&mut self) -> Option<&'a OsStr> {
None
}
fn size_hint(&self) -> (usize, Option<usize>) {
(0, Some(0))
}
}
impl<'a> ExactSizeIterator for CommandArgs<'a> {}
impl<'a> fmt::Debug for CommandArgs<'a> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_list().finish()
}
}
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