///! This crate exists to build crates for wasm32-wasi in build.rs, and execute
///! these wasm programs in harnesses defined under tests/.
use std::io::IsTerminal;

#[cfg(all(feature = "test_programs", not(skip_wasi_http_tests)))]
pub mod http_server;

/// The wasi-tests binaries use these environment variables to determine their
/// expected behavior.
/// Used by all of the tests/ which execute the wasi-tests binaries.
pub fn wasi_tests_environment() -> &'static [(&'static str, &'static str)] {
    #[cfg(windows)]
    {
        &[
            ("ERRNO_MODE_WINDOWS", "1"),
            // Windows does not support dangling links or symlinks in the filesystem.
            ("NO_DANGLING_FILESYSTEM", "1"),
            // Windows does not support renaming a directory to an empty directory -
            // empty directory must be deleted.
            ("NO_RENAME_DIR_TO_EMPTY_DIR", "1"),
            // cap-std-sync does not support the sync family of fdflags
            ("NO_FDFLAGS_SYNC_SUPPORT", "1"),
        ]
    }
    #[cfg(all(unix, not(target_os = "macos")))]
    {
        &[
            ("ERRNO_MODE_UNIX", "1"),
            // cap-std-sync does not support the sync family of fdflags
            ("NO_FDFLAGS_SYNC_SUPPORT", "1"),
        ]
    }
    #[cfg(target_os = "macos")]
    {
        &[
            ("ERRNO_MODE_MACOS", "1"),
            // cap-std-sync does not support the sync family of fdflags
            ("NO_FDFLAGS_SYNC_SUPPORT", "1"),
        ]
    }
}

pub fn stdio_is_terminal() -> bool {
    std::io::stdin().is_terminal()
        && std::io::stdout().is_terminal()
        && std::io::stderr().is_terminal()
}