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pub(crate) struct Task {
pub name: &'static str,
pub exec: fn(&[String]) -> Result<String, String>,
}
pub(crate) const TASKS: &[Task] = &[
Task {
name: "nop",
exec: no_op,
},
Task {
name: "exec",
exec: exec,
},
];
fn no_op(_: &[String]) -> Result<String, String> {
Ok("".to_string())
}
fn exec(cmds: &[String]) -> Result<String, String> {
use std::process::Command;
// TODO: fmt and add exit code, and add support for both stdout and stderr, and support for no output
match Command::new(cmds[0].as_str()).args(&cmds[1..]).output() {
Ok(o) => {
if o.status.success() {
Ok(String::from_utf8(o.stdout)
.unwrap_or("Failed decoding vec<u8> -> String".to_string())
.to_string())
} else {
Err(String::from_utf8(o.stderr)
.unwrap_or("Failed decoding vec<u8> -> String".to_string())
.to_string())
}
}
Err(e) => Err(e.to_string()),
}
}
#[derive(Debug)]
pub(crate) enum IntoTaskErr {
NotFound(String),
}
pub(crate) trait IntoTask {
fn into_task<'a>(self) -> Result<&'a Task, IntoTaskErr>;
}
impl IntoTask for String {
fn into_task<'a>(self) -> Result<&'a Task, IntoTaskErr> {
for task in TASKS {
if task.name == self {
return Ok(task);
}
}
Err(IntoTaskErr::NotFound(self))
}
}
impl IntoTask for &str {
fn into_task<'a>(self) -> Result<&'a Task, IntoTaskErr> {
for task in TASKS {
if task.name == self {
return Ok(task);
}
}
Err(IntoTaskErr::NotFound(self.to_string()))
}
}
|
