monochromatic-git-policy-cli 0.5.25

Repository-owned Git policy wrapper: forwards Git commands and checks commits against configured policies.
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//! What:
//!  Finding `strace`, which the budget, fault and child-bound controls run a wrapped command under.
//! Why:
//!  A traced command runs with the fixture's restricted `PATH`, which lacks the directory of `strace`, so a bare name would
//!  fail to start there even where the tool is installed; a host without it reports that and checks nothing.

use std::path::PathBuf;
use std::process::Command;

/// The absolute path of `strace` on the test process's own `PATH`, or nothing when it is not installed.
///  A traced command runs with the fixture's restricted `PATH`, which lacks the directory of `strace`, so a bare name
///  would fail to start there even where the tool is installed.
pub(super) fn strace_program() -> Option<PathBuf> {
    let search = std::env::var_os("PATH")?;
    return std::env::split_paths(&search).map(|directory| { return directory.join("strace"); })
        .find(|candidate| { return candidate.is_file(); });
}

/// Whether `strace` can be started.
pub(super) fn strace_available() -> bool {
    return strace_program().is_some_and(|program| {
        return Command::new(program).arg("--version").output().is_ok();
    });
}