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//! Utilities for managing child processes.
//!
//! This module helps us ensure that all child processes that we spawn get
//! properly logged and their output is logged as well.
use anyhow::{bail, Result};
use log::info;
use std::process::{Command, Stdio};
/// Return a new Command object
pub fn new_command(program: &str) -> Command {
// On Windows, initializes launching <program> as `cmd /c <program>`.
// Initializing only with `Command::new("npm")` will launch
// `npm` with quotes, `"npm"`, causing a run-time error on Windows.
// See rustc: #42436, #42791, #44542
if cfg!(windows) {
let mut cmd = Command::new("cmd");
cmd.arg("/c").arg(program);
cmd
} else {
Command::new(program)
}
}
/// Run the given command and return on success.
pub fn run(mut command: Command, command_name: &str) -> Result<()> {
info!("Running {:?}", command);
let status = command.status()?;
if status.success() {
Ok(())
} else {
bail!(
"failed to execute `{}`: exited with {}\n full command: {:?}",
command_name,
status,
command,
)
}
}
/// Run the given command and return its stdout.
pub fn run_capture_stdout(
mut command: Command,
command_name: impl std::fmt::Display,
) -> Result<String> {
info!("Running {:?}", command);
let output = command
.stderr(Stdio::inherit())
.stdin(Stdio::inherit())
.output()?;
if output.status.success() {
Ok(String::from_utf8_lossy(&output.stdout).into_owned())
} else {
bail!(
"failed to execute `{}`: exited with {}\n full command: {:?}",
command_name,
output.status,
command,
)
}
}