use std::env;
use std::error::Error;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use std::process::Command;
struct IgnoredError {}
impl<E> From<E> for IgnoredError
where
E: Error,
{
fn from(_: E) -> IgnoredError {
IgnoredError {}
}
}
fn main() {
let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out_dir.join("commit-info.txt"))
.unwrap()
.write_all(commit_info().as_bytes())
.unwrap();
}
fn commit_info() -> String {
match (commit_hash(), commit_date()) {
(Ok(hash), Ok(date)) => format!(" ({} {})", hash.trim(), date.trim()),
_ => String::new(),
}
}
fn commit_hash() -> Result<String, IgnoredError> {
Ok(
try!(
String::from_utf8(
try!(
Command::new("git")
.args(&["rev-parse", "--short", "HEAD"])
.output()
)
.stdout,
)
),
)
}
fn commit_date() -> Result<String, IgnoredError> {
Ok(
try!(
String::from_utf8(
try!(
Command::new("git")
.args(
&[
"log",
"-1",
"--date=short",
"--pretty=format:%cd",
],
)
.output()
)
.stdout,
)
),
)
}