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use std::ffi::OsString;
use std::path::Path;
use std::process::Command;
use anyhow::{Context, Result, bail};
use crate::package_installer::{PackageInstaller, PackageRequest};
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Invocation {
program: OsString,
arguments: Vec<OsString>,
}
impl Invocation {
pub fn new(
program: impl Into<OsString>,
arguments: impl IntoIterator<Item = impl Into<OsString>>,
) -> Self {
Self {
program: program.into(),
arguments: arguments.into_iter().map(Into::into).collect(),
}
}
pub fn program(&self) -> &OsString {
&self.program
}
pub fn arguments(&self) -> &[OsString] {
&self.arguments
}
}
pub trait CommandRunner {
fn run(&self, invocation: Invocation) -> Result<()>;
}
#[derive(Debug, Default, Clone, Copy)]
pub struct ProcessRunner;
impl CommandRunner for ProcessRunner {
fn run(&self, invocation: Invocation) -> Result<()> {
let status = Command::new(&invocation.program)
.args(&invocation.arguments)
.status()
.with_context(|| format!("run {}", invocation.program.to_string_lossy()))?;
if !status.success() {
bail!(
"{} exited with {status}",
invocation.program.to_string_lossy()
);
}
Ok(())
}
}
/// Runs Hasher commands under the configured non-root Hasher account.
/// Root retains ownership of native rootfs finalization and packaging stages.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct SudoUserRunner {
user: OsString,
}
impl SudoUserRunner {
pub fn new(user: impl Into<OsString>) -> Self {
Self { user: user.into() }
}
pub fn wrap(&self, invocation: Invocation) -> Invocation {
let mut arguments = vec![
OsString::from("-n"),
OsString::from("-u"),
self.user.clone(),
];
arguments.push(invocation.program);
arguments.extend(invocation.arguments);
Invocation::new("sudo", arguments)
}
pub fn prepare_workdir(&self, workdir: &Path) -> Invocation {
Invocation::new(
"sudo",
[
"-n".into(),
"install".into(),
"-d".into(),
"-o".into(),
self.user.clone(),
"-g".into(),
self.user.clone(),
workdir.as_os_str().to_owned(),
],
)
}
}
impl CommandRunner for SudoUserRunner {
fn run(&self, invocation: Invocation) -> Result<()> {
if let Some(workdir) = invocation
.arguments()
.windows(2)
.find_map(|pair| (pair[0] == "--workdir").then(|| Path::new(&pair[1])))
{
ProcessRunner.run(self.prepare_workdir(workdir))?;
}
ProcessRunner.run(self.wrap(invocation))
}
}
#[derive(Debug)]
pub struct HasherInstaller<R> {
runner: R,
}
impl<R> HasherInstaller<R> {
pub fn new(runner: R) -> Self {
Self { runner }
}
pub fn runner(&self) -> &R {
&self.runner
}
}
impl<R: CommandRunner> PackageInstaller for HasherInstaller<R> {
fn install(&self, request: &PackageRequest) -> Result<()> {
self.runner.run(Invocation::new(
"hsh",
[
"--mountpoints=/proc".into(),
"--initroot-only".into(),
"--apt-config".into(),
request.apt_config().as_path().as_os_str().to_owned(),
"--workdir".into(),
request.workdir().as_os_str().to_owned(),
],
))?;
let mut arguments = vec![
OsString::from("--mountpoints=/proc"),
OsString::from("--workdir"),
request.workdir().as_os_str().to_owned(),
];
arguments.extend(request.selectors().iter().map(OsString::from));
arguments.extend(request.packages().iter().map(OsString::from));
self.runner.run(Invocation::new("hsh-install", arguments))
}
}
|
