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//@ run-pass
//@ needs-subprocess
//@ ignore-vxworks no 'env'
//@ ignore-fuchsia no 'env'
use std::process::Command;
use std::env;
use std::collections::HashMap;
#[cfg(all(unix, not(target_os="android")))]
pub fn env_cmd() -> Command {
Command::new("env")
}
#[cfg(target_os="android")]
pub fn env_cmd() -> Command {
let mut cmd = Command::new("/system/bin/sh");
cmd.arg("-c").arg("set");
cmd
}
#[cfg(windows)]
pub fn env_cmd() -> Command {
let mut cmd = Command::new("cmd");
cmd.arg("/c").arg("set");
cmd
}
fn main() {
// save original environment
let old_env = env::var_os("RUN_TEST_NEW_ENV");
env::set_var("RUN_TEST_NEW_ENV", "123");
// create filtered environment vector
let filtered_env : HashMap<String, String> =
env::vars().filter(|&(ref k, _)| k == "PATH").collect();
let mut cmd = env_cmd();
cmd.env_clear();
cmd.envs(&filtered_env);
// restore original environment
match old_env {
None => env::remove_var("RUN_TEST_NEW_ENV"),
Some(val) => env::set_var("RUN_TEST_NEW_ENV", &val)
}
let result = cmd.output().unwrap();
let output = String::from_utf8_lossy(&result.stdout);
assert!(!output.contains("RUN_TEST_NEW_ENV"),
"found RUN_TEST_NEW_ENV inside of:\n\n{}", output);
}
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