Process Wrap

https://docs.rs/process-wrap
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Process Wrap provides a composable set of wrappers over standard library and Tokio process commands...
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### Quick start: process-wrap with std feature

Source: https://docs.rs/process-wrap/latest/src/process_wrap/lib.rs.html

Quick start example: add the dependency with the "std" feature, then create a CommandWrap, wrap it with ProcessGroup on Unix or JobObject on Windows, spawn, wait, and debug the status. This is equivalent to command-group 5.x usage; for versions 4.x and below, replace ProcessGroup::leader() with ProcessSession.

```toml
[dependencies]
process-wrap = { version = "10.0.0", features = ["std"] }
```

```rust
# fn main() -> std::io::Result<()> {
use process_wrap::std::*;

let mut command = CommandWrap::with_new("watch", |command| { command.arg("ls"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
let mut child = command.spawn()?;
let status = child.wait()?;
dbg!(status);
# Ok(()) }
```

--------------------------------

### Quick start: spawn and wait with process_wrap

Source: https://docs.rs/process-wrap/latest/index.html

Creates a CommandWrap for 'watch ls', wraps it with ProcessGroup on Unix or JobObject on Windows, then spawns and waits. Uses the std frontend.

```rust
use process_wrap::std::*;

let mut command = CommandWrap::with_new("watch", |command| { command.arg("ls"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
let mut child = command.spawn()?;
let status = child.wait()?;
dbg!(status);

```

--------------------------------

### Wrap a command with log file output

Source: https://docs.rs/process-wrap/latest/src/process_wrap/lib.rs.html

Demonstrates how to use CommandWrap to execute a command and capture its output into a temporary log file. This example includes the implementation of a custom wrapper to handle the child process lifecycle.

```rust
#         &mut self,
#         command: &mut Command,
#         _child: &mut Child,
#         _core: &CommandWrap,
#     ) -> io::Result<()> {
#         command.stdout(Stdio::null()).stderr(Stdio::null());
#
#         Ok(())
#     }
#
#     fn wrap_child(
#         &mut self,
#         child: Box<dyn ChildWrapper>,
#         _core: &CommandWrap,
#     ) -> io::Result<Box<dyn ChildWrapper>> {
#         let wrapped_child = LogFileChild {
#          inner: child,
#          thread: mem::take(&mut self.thread),
#         };
#         Ok(Box::new(wrapped_child))
#     }
# }
#
# #[derive(Debug)]
# struct LogFileChild {
#     inner: Box<dyn ChildWrapper>,
#     thread: Option<JoinHandle<()>>,
# }
#
# impl ChildWrapper for LogFileChild {
#     fn inner(&self) -> &dyn ChildWrapper {
#         &*self.inner
#     }
#
#     fn inner_mut(&mut self) -> &mut dyn ChildWrapper {
#         &mut *self.inner
#     }
#
#     fn into_inner(self: Box<Self>) -> Box<dyn ChildWrapper> {
#         self.inner
#     }
#
#     #[cfg(windows)]
#     fn process_handle(
#         &self,
#     ) -> Option<std::os::windows::io::BorrowedHandle<'_>> {
#         self.inner.process_handle()
#     }
#
#     fn wait(&mut self) -> io::Result<ExitStatus> {
#         let exit_status = self.inner.wait();
#
#         if let Some(thread) = mem::take(&mut self.thread) {
#          thread.join().unwrap();
#         }
#
#         exit_status
#     }
# }
#
fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(windows)]
    let mut command = CommandWrap::with_new("cmd", |command| {
        command.args(["/c", "echo Hello && echo World 1>&2"]);
    });
    #[cfg(unix)]
    let mut command = CommandWrap::with_new("sh", |command| {
        command.args(["-c", "echo Hello && echo World 1>&2"]);
    });

    let logfile = NamedTempFile::new()?;
    let logfile_path = logfile.path();

    command.wrap(LogFile::new(logfile_path)).spawn()?.wait()?;

    let logfile_lines: Vec<String> = fs::read_to_string(logfile_path)?
        .lines()
        .map(|l| l.trim().into())
        .collect();
    assert_eq!(logfile_lines, vec!["Hello", "World"]);

    Ok(())
}
```

--------------------------------

### Example ChildWrapper implementation

Source: https://docs.rs/process-wrap/latest/process_wrap/std/trait.ChildWrapper.html

Shows a minimal wrapper around std::process::Child that implements the required methods. Includes a Windows-specific process_handle override.

```rust
use process_wrap::std::*;
use std::process::Child;

#[derive(Debug)]
pub struct YourChildWrapper(Child);

impl ChildWrapper for YourChildWrapper {
    fn inner(&self) -> &dyn ChildWrapper {
        &self.0
    }

    fn inner_mut(&mut self) -> &mut dyn ChildWrapper {
        &mut self.0
    }

    fn into_inner(self: Box<Self>) -> Box<dyn ChildWrapper> {
        Box::new((*self).0)
    }

    #[cfg(windows)]
    fn process_handle(
        &self,
    ) -> Option<std::os::windows::io::BorrowedHandle<'_>> {
        self.0.process_handle()
    }
}
```

--------------------------------

### Implement ChildWrapper for a custom wrapper

Source: https://docs.rs/process-wrap/latest/process_wrap/tokio/trait.ChildWrapper.html

Example wrapper implementation for `ChildWrapper`. It wraps a `tokio::process::Child` and implements the three required methods, plus a Windows-only `process_handle` override. The wrapper must be acyclic and terminate in a native `Child` or a self-returning non-native child.

```rust
use process_wrap::tokio::*;
use tokio::process::Child;

#[derive(Debug)]
pub struct YourChildWrapper(Child);

impl ChildWrapper for YourChildWrapper {
    fn inner(&self) -> &dyn ChildWrapper {
        &self.0
    }

    fn inner_mut(&mut self) -> &mut dyn ChildWrapper {
        &mut self.0
    }

    fn into_inner(self: Box<Self>) -> Box<dyn ChildWrapper> {
        Box::new((*self).0)
    }

    #[cfg(windows)]
    fn process_handle(
        &self,
    ) -> Option<std::os::windows::io::BorrowedHandle<'_>> {
        self.0.process_handle()
    }
}
```

--------------------------------

### Minimal CommandWrapper Implementation

Source: https://docs.rs/process-wrap/latest/process_wrap/std/trait.CommandWrapper.html

An example of a minimal implementation of the CommandWrapper trait.

```rust
#[derive(Debug)]
pub struct YourWrapper;
impl CommandWrapper for YourWrapper {}
```

--------------------------------

### Implement LogFile CommandWrapper and ChildWrapper

Source: https://docs.rs/process-wrap/latest/src/process_wrap/lib.rs.html

Defines the LogFile struct and its implementation of CommandWrapper for pre-spawn setup and ChildWrapper for managing the logging thread and process lifecycle.

```rust
    fn pre_spawn(&mut self, command: &mut Command, _core: &CommandWrap) -> io::Result<()> {
        let mut logfile = File::create(&self.path)?;
        let (mut rx, tx) = io::pipe()?;

        self.thread = Some(thread::spawn(move || {
         io::copy(&mut rx, &mut logfile).unwrap();
        }));

        command.stdout(tx.try_clone()?).stderr(tx);
        Ok(())
    }

    fn wrap_child(
        &mut self,
        child: Box<dyn ChildWrapper>,
        _core: &CommandWrap,
    ) -> io::Result<Box<dyn ChildWrapper>> {
        let wrapped_child = LogFileChild {
         inner: child,
         thread: mem::take(&mut self.thread),
        };
        Ok(Box::new(wrapped_child))
    }
}

#[derive(Debug)]
struct LogFileChild {
    inner: Box<dyn ChildWrapper>,
    thread: Option<JoinHandle<()>>,
}

impl ChildWrapper for LogFileChild {
    fn inner(&self) -> &dyn ChildWrapper {
        &*self.inner
    }

    fn inner_mut(&mut self) -> &mut dyn ChildWrapper {
        &mut *self.inner
    }

    fn into_inner(self: Box<Self>) -> Box<dyn ChildWrapper> {
        self.inner
    }

    #[cfg(windows)]
    fn process_handle(
        &self,
    ) -> Option<std::os::windows::io::BorrowedHandle<'_>> {
        self.inner.process_handle()
    }

    fn wait(&mut self) -> io::Result<ExitStatus> {
        let exit_status = self.inner.wait();

        if let Some(thread) = mem::take(&mut self.thread) {
         thread.join().unwrap();
        }

        exit_status
    }
}
```

--------------------------------

### ProcessGroupChild::pgid

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.ProcessGroupChild.html

Get the process group ID of this child process.

```APIDOC
## ProcessGroupChild::pgid

### Description
Get the process group ID of this child process.

### Method
`pub fn pgid(&self) -> u32`

### Parameters
None.

### Returns
- `u32` - The process group ID of the child process.

```

--------------------------------

### Apply Windows Creation Flags

Source: https://docs.rs/process-wrap/latest/index.html

Demonstrates how to apply Windows-specific creation flags using CommandWrap.

```rust
use process_wrap::std::*;
let mut command = CommandWrap::with_new("ls", |command| { command.arg("-l"); });
command.wrap(CreationFlags(CREATE_NO_WINDOW));
```

--------------------------------

### CommandWrap::get_wrap

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Gets a reference to a wrapper of a given type. Useful for accessing wrapper state from within another wrapper.

```APIDOC
## CommandWrap::get_wrap

### Description
Gets a reference to a wrapper of a given type. Useful for accessing wrapper state from within another wrapper.

### Method
`pub fn get_wrap<W: CommandWrapper + 'static>(&self) -> Option<&W>`

### Returns
- **Option<&W>** - A reference to the wrapper if present, `None` otherwise.

### Notes
While a wrapper's lifecycle hook is running, that active wrapper is temporarily unavailable through this method; peer wrappers remain available. Use `has_wrap` to merely check registration.
```

--------------------------------

### Spawn a command with process-wrap

Source: https://docs.rs/process-wrap

Demonstrates spawning a command using CommandWrap, applying platform-specific wrappers for process groups on Unix or job objects on Windows.

```rust
use process_wrap::std::*;

let mut command = CommandWrap::with_new("watch", |command| { command.arg("ls"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
let mut child = command.spawn()?;
let status = child.wait()?;
dbg!(status);
```

--------------------------------

### Implement a Basic Tokio Wrapper

Source: https://docs.rs/process-wrap/latest/index.html

Shows the minimal implementation required to create a custom wrapper for Tokio.

```rust
use process_wrap::tokio::*;
#[derive(Debug)]
pub struct YourWrapper;
impl CommandWrapper for YourWrapper {}
```

--------------------------------

### Construct CommandWrap with a closure

Source: https://docs.rs/process-wrap/latest/index.html

Shows a more ergonomic way to create a CommandWrap using with_new and a closure to configure the command, then add platform-specific wrappers.

```rust
use process_wrap::std::*;
let mut command = CommandWrap::with_new("ls", |command| { command.arg("-l"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```

--------------------------------

### CommandWrap::spawn_with

Source: https://docs.rs/process-wrap/latest/src/process_wrap/generic_wrap.rs.html

Spawns the command using a custom native-child spawner function, running pre_spawn hooks, then the closure, then post_spawn hooks, then wrap_child hooks.

```APIDOC
## CommandWrap::spawn_with

### Description
Spawns the command using a custom native-child spawner closure. The closure receives a mutable reference to the underlying command and must return a native Child. Lifecycle: pre_spawn, closure, post_spawn, wrap_child.

### Method
spawn_with

### Signature
pub fn spawn_with(
    &mut self,
    spawner: impl FnOnce(&mut $command) -> ::std::io::Result<$child>
) -> ::std::io::Result<Box<dyn $childer>>

### Parameters
- **spawner** (FnOnce(&mut $command) -> ::std::io::Result<$child>) - Required - Closure that creates the native child process.

### Return Value
- **Result<Box<dyn $childer>>** - Ok on success, Err on IO failure.
```

--------------------------------

### Construct CommandWrap from an existing process::Command

Source: https://docs.rs/process-wrap/latest/index.html

Shows how to wrap an existing std::process::Command with CommandWrap and add platform-specific wrappers (ProcessGroup on Unix, JobObject on Windows).

```rust
use process_wrap::std::*;
use std::process::Command;
let mut command = Command::new("ls");
command.arg("-l");
let mut command = CommandWrap::from(command);
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```

--------------------------------

### CommandWrap::spawn

Source: https://docs.rs/process-wrap/latest/process_wrap/tokio/struct.CommandWrap.html

Spawns the command and returns a boxed child wrapper.

```APIDOC
## CommandWrap::spawn

### Description
Spawns the command, returning a boxed `ChildWrapper`. Runs all `pre_spawn` hooks, spawns the command, runs all `post_spawn` hooks, and stacks all `wrap_child`s.

### Method
`spawn`

### Signature
```rust
pub fn spawn(&mut self) -> Result<Box<dyn ChildWrapper>>
```

### Returns
- `Result<Box<dyn ChildWrapper>>` - A boxed trait object representing the spawned child process. Downcast to the concrete type of the last applied wrapper if needed.
```

--------------------------------

### CommandWrap::spawn

Source: https://docs.rs/process-wrap/latest/index.html

Spawns the process and returns a Child that can be interacted with. Methods on Child mimic those on process::Child but may be customized by the wrappers.

```APIDOC
## CommandWrap::spawn

### Description
Spawns the process and returns a Child that can be interacted with. Methods on Child mimic those on process::Child but may be customized by the wrappers.

### Method
spawn

### Returns
- **Child** - The spawned child process.

### Example
```rust
let mut child = command.spawn();
```
```

--------------------------------

### Test LogFile wrapper with CommandWrap

Source: https://docs.rs/process-wrap/latest/index.html

Tests the LogFile wrapper by running a command that echoes to stdout and stderr, then verifies the log file contains both lines. Uses cfg to select cmd on Windows and sh on Unix.

```rust
fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(windows)]
    let mut command = CommandWrap::with_new("cmd", |command| {
        command.args(["/c", "echo Hello && echo World 1>&2"]);
    });
    #[cfg(unix)]
    let mut command = CommandWrap::with_new("sh", |command| {
        command.args(["-c", "echo Hello && echo World 1>&2"]);
    });

    let logfile = NamedTempFile::new()?;
    let logfile_path = logfile.path();

    command.wrap(LogFile::new(logfile_path)).spawn()?.wait()?;

    let logfile_lines: Vec<String> = fs::read_to_string(logfile_path)?
        .lines()
        .map(|l| l.trim().into())
        .collect();
    assert_eq!(logfile_lines, vec!["Hello", "World"]);

    Ok(())
}
```

--------------------------------

### CommandWrap::spawn

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Spawns the command, returning a boxed ChildWrapper. Runs pre_spawn hooks, spawns the command, runs post_spawn hooks, and stacks wrap_child hooks.

```APIDOC
## CommandWrap::spawn

### Description
Spawns the command, returning a boxed `ChildWrapper`. Runs all `pre_spawn` hooks, then spawns the command, then runs all `post_spawn` hooks, then stacks all `wrap_child`s.

### Method
`pub fn spawn(&mut self) -> Result<Box<dyn ChildWrapper>>`

### Returns
- **Result<Box<dyn ChildWrapper>>** - A boxed trait object representing the spawned child process.

### Notes
Only methods from the trait are available directly; you may downcast to the concrete type of the last applied wrapper if needed.
```

--------------------------------

### CommandWrap::spawn

Source: https://docs.rs/process-wrap/latest/process_wrap

Spawns the process, returning a Child that can be interacted with.

```APIDOC
## CommandWrap::spawn

### Description
Spawns the process, after which the Child can be interacted with. Methods on Child mimic those on process::Child, but may be customised by the wrappers.

### Method
spawn

### Returns
- **Child** - The spawned child process wrapper.

### Example
```rust
let child = command.spawn();
```
```

--------------------------------

### CommandWrap::with_new

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Creates a new CommandWrap from a program name and a closure to configure the command. This is a convenience method that creates a new Command, calls the closure, and wraps it.

```APIDOC
## CommandWrap::with_new

### Description
Creates a new `CommandWrap` from a program name and a closure to configure the command. This is a convenience method that creates a new `Command`, calls the closure, and wraps it.

### Method
`pub fn with_new(program: impl AsRef<OsStr>, init: impl FnOnce(&mut Command)) -> Self`

### Parameters
- **program** (impl AsRef<OsStr>) - Required - The program name to run.
- **init** (impl FnOnce(&mut Command)) - Required - A closure to configure the command.

### Returns
- **Self** - A new `CommandWrap` instance.

### Notes
Alternatively, use `From`/`Into` to convert a `Command` to a `CommandWrap`.
```

--------------------------------

### CommandWrap::spawn_with

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Spawns the command using a custom native-child spawner function. The lifecycle is the same as spawn, but the provided closure creates the native child process.

```APIDOC
## CommandWrap::spawn_with

### Description
Spawns the command using a custom native-child spawner function. The lifecycle is the same as `spawn`, but the provided closure creates the native child process.

### Method
`pub fn spawn_with(&mut self, spawner: impl FnOnce(&mut Command) -> Result<Child>) -> Result<Box<dyn ChildWrapper>>`

### Parameters
- **spawner** (impl FnOnce(&mut Command) -> Result<Child>) - Required - A closure that creates the native child process.

### Returns
- **Result<Box<dyn ChildWrapper>>** - A boxed trait object representing the spawned child process.

### Notes
All `pre_spawn` hooks run first, then the closure is called, then `post_spawn` hooks, then `wrap_child`.
```

--------------------------------

### Importing tokio module

Source: https://docs.rs/process-wrap/latest/process_wrap/tokio/index.html

The recommended way to use the tokio module is to star-import it.

```rust
use process_wrap::tokio::*;
```

--------------------------------

### Use KillOnDrop shim with CommandWrap (Tokio)

Source: https://docs.rs/process-wrap/latest/index.html

Shows how to use the KillOnDrop shim instead of .kill_on_drop(true) on Command, which is required for JobObject on Windows to access the setting.

```rust
use process_wrap::tokio::*;
let mut command = CommandWrap::with_new("ls", |command| { command.arg("-l"); });
command.wrap(KillOnDrop);
```

--------------------------------

### CommandWrap::with_new

Source: https://docs.rs/process-wrap/latest/process_wrap

Constructs a CommandWrap using a closure to configure a new command.

```APIDOC
## CommandWrap::with_new

### Description
Constructs a CommandWrap using a closure to configure a new command.

### Method
with_new

### Parameters
- **program** (string) - Required - The program to run.
- **configure** (closure) - Required - A closure that receives a mutable reference to the Command for configuration.

### Example
```rust
use process_wrap::std::*;
let mut command = CommandWrap::with_new("ls", |command| { command.arg("-l"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```
```

--------------------------------

### Constructing CommandWrap: from, with_new, and fluent style

Source: https://docs.rs/process-wrap/latest/src/process_wrap/lib.rs.html

Three ways to construct a CommandWrap: from an existing std::process::Command, via the closure pattern with CommandWrap::with_new, and a fluent style for single-platform targets. The wrap method can be called multiple times; wrappers are applied in the order added.

```rust
use process_wrap::std::*;
use std::process::Command;
let mut command = Command::new("ls");
command.arg("-l");
let mut command = CommandWrap::from(command);
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```

```rust
use process_wrap::std::*;
let mut command = CommandWrap::with_new("ls", |command| { command.arg("-l"); });
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```

```rust
use process_wrap::std::*;
CommandWrap::with_new("ls", |command| { command.arg("-l"); })
   .wrap(ProcessGroup::leader());
```

--------------------------------

### Implement a Logging Wrapper

Source: https://docs.rs/process-wrap/latest/index.html

An initial implementation of a logging wrapper that redirects stdout and stderr to a file using a background thread.

```rust
#[derive(Debug)]
struct LogFile {
    path: PathBuf,
}

impl LogFile {
    fn new(path: impl Into<PathBuf>) -> Self {
        Self { path: path.into() }
    }
}

impl CommandWrapper for LogFile {
    fn pre_spawn(&mut self, command: &mut Command, _core: &CommandWrap) -> io::Result<()> {
        let mut logfile = File::create(&self.path)?;
        let (mut rx, tx) = io::pipe()?;

        thread::spawn(move || {
         io::copy(&mut rx, &mut logfile).unwrap();
        });

        command.stdout(tx.try_clone()?).stderr(tx);
        Ok(())
    }
}
```

--------------------------------

### Fluent style for single-platform wrapping

Source: https://docs.rs/process-wrap/latest/index.html

Shows a fluent style for wrapping a command when targeting a single platform, using ProcessGroup::leader() on Unix.

```rust
use process_wrap::std::*;
CommandWrap::with_new("ls", |command| { command.arg("-l"); })
   .wrap(ProcessGroup::leader());
```

--------------------------------

### spawn public API

Source: https://docs.rs/process-wrap/latest/src/process_wrap/generic_wrap.rs.html

Spawns the command by running pre-spawn hooks, spawning, post-spawn hooks, and wrapping the child.

```rust
pub fn spawn(&mut self) -> ::std::io::Result<Box<dyn $childer>> {
				self.spawn_with(|command| command.spawn())
			}
```

--------------------------------

### CommandWrap::from

Source: https://docs.rs/process-wrap/latest/index.html

Constructs a CommandWrap from an existing std::process::Command. This allows wrapping an already configured command with additional process wrappers.

```APIDOC
## CommandWrap::from

### Description
Constructs a CommandWrap from an existing std::process::Command. This allows wrapping an already configured command with additional process wrappers.

### Method
from

### Parameters
- **command** (std::process::Command) - Required - The command to wrap.

### Example
```rust
use process_wrap::std::*;
use std::process::Command;
let mut command = Command::new("ls");
command.arg("-l");
let mut command = CommandWrap::from(command);
#[cfg(unix)] { command.wrap(ProcessGroup::leader()); }
#[cfg(windows)] { command.wrap(JobObject); }
```
```

--------------------------------

### Importing std module

Source: https://docs.rs/process-wrap/latest/process_wrap/std/index.html

The recommended way to use the std-based process-wrap API is to perform a star import from the module.

```rust
use process_wrap::std::*;
```

--------------------------------

### CommandWrap::command

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Returns a reference to the wrapped Command.

```APIDOC
## CommandWrap::command

### Description
Returns a reference to the wrapped `Command`.

### Method
`pub fn command(&self) -> &Command`

### Returns
- **&Command** - A reference to the wrapped command.
```

--------------------------------

### CommandWrap::into_command

Source: https://docs.rs/process-wrap/latest/process_wrap/std/struct.CommandWrap.html

Consumes the CommandWrap and returns the wrapped Command.

```APIDOC
## CommandWrap::into_command

### Description
Consumes the `CommandWrap` and returns the wrapped `Command`.

### Method
`pub fn into_command(self) -> Command`

### Returns
- **Command** - The wrapped command.
```

--------------------------------

### Test LogFile CommandWrapper

Source: https://docs.rs/process-wrap/latest/src/process_wrap/lib.rs.html

Provides a skeleton for testing the LogFile implementation.

```rust
# use process_wrap::std::{ChildWrapper, CommandWrap, CommandWrapper};
# use std::{
#     error::Error,
#     fs::{self, File},
#     io, mem,
#     path::PathBuf,
#     process::{Child, Command, ExitStatus, Stdio},
#     thread::{self, JoinHandle},
# };
# use tempfile::NamedTempFile;
# #[derive(Debug)]
# struct LogFile {
#     path: PathBuf,
#     thread: Option<JoinHandle<()>>,
# }
#
# impl LogFile {
#     fn new(path: impl Into<PathBuf>) -> Self {
#         Self {
#          path: path.into(),
#          thread: None,
#         }
#     }
# }
#
# impl CommandWrapper for LogFile {
#     fn pre_spawn(&mut self, command: &mut Command, _core: &CommandWrap) -> io::Result<()> {
#         let mut logfile = File::create(&self.path)?;
#         let (mut rx, tx) = io::pipe()?;
#
#         self.thread = Some(thread::spawn(move || {
#          io::copy(&mut rx, &mut logfile).unwrap();
#         }));
#
#         command.stdout(tx.try_clone()?).stderr(tx);
#         Ok(())
#     }
#
#     fn post_spawn(

```
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