submodules/
lib.rs

1use std::process::Command;
2use std::convert::AsRef;
3use std::ffi::OsStr;
4
5pub struct Update {
6    cmd: Command,
7}
8
9pub fn update() -> Update {
10    let mut update = Update { cmd: Command::new("git") };
11    update.arg("submodule").arg("update");
12    update
13}
14
15impl Update {
16    fn arg<S: AsRef<OsStr>>(&mut self, arg: S) -> &mut Update {
17        self.cmd.arg(arg);
18        self
19    }
20
21    pub fn init(&mut self) -> &mut Update { self.arg("--init") }
22    pub fn rebase(&mut self) -> &mut Update { self.arg("--rebase") }
23    pub fn merge(&mut self) -> &mut Update { self.arg("--merge") }
24    pub fn checkout(&mut self) -> &mut Update { self.arg("--checkout") }
25    pub fn remote(&mut self) -> &mut Update { self.arg("--remote") }
26    pub fn no_fetch(&mut self) -> &mut Update { self.arg("--no-fetch") }
27    pub fn recursive(&mut self) -> &mut Update { self.arg("--recursive") }
28    pub fn force(&mut self) -> &mut Update { self.arg("--force") }
29
30    pub fn run(&mut self) { 
31        println!("running: {:?}", self.cmd);
32        let status = match self.cmd.status() {
33            Ok(status) => status,
34            Err(e) => fail(&format!("failed to execute command: {}", e)),
35        };
36
37        if !status.success() {
38            fail(&format!("command did not execute successfully, got: {}", status));
39        }
40    }
41}
42
43fn fail(msg: &str) -> ! {
44    println!("\n\n{}\n\n", msg);
45    panic!()
46}
47
48#[test]
49fn build_update() {
50    let mut update = update();
51    update.init()
52        .recursive();
53
54    assert_eq!(format!("{:?}", update.cmd),
55        "\"git\" \"submodule\" \"update\" \"--init\" \"--recursive\"")
56}
submodules/lib.rs

submodules/
lib.rs
