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use std::{
ffi::{OsStr, OsString},
fmt::{self, Display},
iter::once,
process::{Command, Output},
};
use format::lazy_format;
use miette::{ensure, Context, IntoDiagnostic};
pub(crate) fn which(name: &'static str, desc: &str) -> miette::Result<OsString> {
let found = ::which::which(name)
.into_diagnostic()
.wrap_err(lazy_format!("failed to find `{name}` executable"))?;
log::debug!("using {desc} from {}", found.display());
Ok(found.file_name().unwrap().to_owned())
}
pub(crate) struct EasyCommand {
inner: Command,
}
impl EasyCommand {
pub(crate) fn new<C>(cmd: C, f: impl FnOnce(&mut Command) -> &mut Command) -> Self
where
C: AsRef<OsStr>,
{
let mut cmd = Command::new(cmd);
f(&mut cmd);
Self { inner: cmd }
}
pub(crate) fn spawn(&mut self) -> miette::Result<()> {
log::debug!("spawning {self}…");
let status = self
.inner
.spawn()
.into_diagnostic()
.wrap_err_with(|| format!("failed to spawn {self}"))?
.wait()
.into_diagnostic()
.wrap_err_with(|| format!("failed to wait for exit code from {self}"))?;
log::debug!("{self} returned {:?}", status.code());
ensure!(status.success(), "{self} returned {:?}", status.code());
Ok(())
}
fn just_stdout(&mut self) -> miette::Result<Vec<u8>> {
log::debug!("getting `stdout` output of {self}");
let output = self
.inner
.output()
.into_diagnostic()
.wrap_err_with(|| format!("failed to execute `{self}`"))?;
let Output {
status,
stdout: _,
stderr,
} = &output;
log::debug!("{self} returned {:?}", status.code());
ensure!(
status.success(),
"{self} returned {:?}; full output: {output:#?}",
status.code(),
);
assert!(stderr.is_empty());
Ok(output.stdout)
}
pub(crate) fn just_stdout_utf8(&mut self) -> miette::Result<String> {
String::from_utf8(self.just_stdout()?)
.into_diagnostic()
.wrap_err_with(|| format!("output of {self} was not UTF-8 (!?)"))
}
}
impl Display for EasyCommand {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let Self { inner } = self;
let prog = inner.get_program().to_string_lossy();
let args = inner.get_args().map(|a| a.to_string_lossy());
let shell_words = ::shell_words::join(once(prog).chain(args));
write!(f, "`{shell_words}`")
}
}