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Add a negation flag for the success command.

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Modifies the trigger to run when the command fails instead of
when it succeeds.
This commit is contained in:
Jeremy Wall 2017-04-26 18:55:13 -05:00
parent 07120d141f
commit b2b842d12f
2 changed files with 9 additions and 2 deletions
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6
src/exec.rs
View File

@ -67,6 +67,7 @@ fn is_cmd_success(cmd: &str, env: Option<Vec<&str>>) -> bool {
pub struct ExecProcess<'a> {
test_cmd: &'a str,
negate: bool,
cmd: &'a str,
env: Option<Vec<&'a str>>,
poll: Duration,
@ -75,10 +76,12 @@ pub struct ExecProcess<'a> {
impl<'a> ExecProcess<'a> {
pub fn new(test_cmd: &'a str,
cmd: &'a str,
negate: bool,
env: Option<Vec<&'a str>>,
poll: Duration) -> ExecProcess<'a> {
ExecProcess {
test_cmd: test_cmd,
negate: negate,
cmd: cmd,
env: env,
poll: poll,
@ -90,7 +93,8 @@ impl<'a> Process for ExecProcess<'a> {
fn run(&self) -> Result<(), CommandError> {
loop {
// TODO(jwall): Should we set the environment the same as the other command?
if is_cmd_success(self.test_cmd, None) {
let test_result = is_cmd_success(self.test_cmd, None);
if (test_result && !self.negate) || (!test_result && self.negate) {
if let Err(err) = run_cmd(self.cmd, &self.env) {
println!("{:?}", err)
}

5
src/main.rs
View File

@ -62,6 +62,8 @@ fn do_flags<'a>() -> clap::ArgMatches<'a> {
(about: "Trigger that fires if a command runs successful.")
(@arg ifcmd: --if +required +takes_value
"The command to test for successful exit from")
(@arg not: --not
"Negate the test command so we run on failure instead of success.")
(@arg wait: --poll +takes_value
"How frequently to test command (default 5s)")
)
@ -122,9 +124,10 @@ fn main() {
} else if let Some(matches) = app.subcommand_matches("success") {
// unwrap because this is required.
let ifcmd = matches.value_of("ifcmd").expect("ifcmd flag is required");
let negate = matches.is_present("not");
let dur = humantime::parse_duration(matches.value_of("poll").unwrap_or("5s"));
process = match dur {
Ok(duration) => Some(Box::new(ExecProcess::new(ifcmd, cmd, maybe_env, duration))),
Ok(duration) => Some(Box::new(ExecProcess::new(ifcmd, cmd, negate, maybe_env, duration))),
Err(msg) => {
println!("Malformed poll {:?}", msg);
process::exit(1)