Struct SystemPresence 

pub struct SystemPresence;

The process’s own PATH and environment: an executable counts when a file of its name with an execute bit stands in a PATH directory, a variable when it is set and non-empty. A name containing / is never an executable on PATH.

use majordomus_cli::reasoning::availability::{Presence, SystemPresence};

std::env::set_var("MAJORDOMUS_DOCTEST_PRESENCE", "set");
assert!(SystemPresence.variable("MAJORDOMUS_DOCTEST_PRESENCE"));
std::env::set_var("MAJORDOMUS_DOCTEST_PRESENCE", "");
assert!(!SystemPresence.variable("MAJORDOMUS_DOCTEST_PRESENCE"));
assert!(!SystemPresence.executable("bin/a-path-is-not-a-name"));

Trait Implementations

impl Clone for SystemPresence

fn clone(&self) -> SystemPresence

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SystemPresence

impl Debug for SystemPresence

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SystemPresence

fn default() -> SystemPresence

Returns the “default value” for a type.

impl Presence for SystemPresence

fn executable(&self, name: &str) -> bool

Whether an executable of this name is on PATH: what says a client tool or a local runtime is installed.

fn variable(&self, name: &str) -> bool

Whether an environment variable of this name is set and non-empty: what says an API advisor’s credential is configured. Never its value.