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113 lines
2.9 KiB
113 lines
2.9 KiB
use std::error::Error;
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use std::fmt;
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use std::io;
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use std::path::Path;
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use command_runner::CommandRunner;
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use resources::Resource;
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use symbols::{Action, OwnedSymbolAction, Symbol, SymbolAction, SymbolRunner};
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pub struct GitCheckout<'a, C: 'a + CommandRunner, T: AsRef<str>> {
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target: T,
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source: &'a str,
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branch: &'a str,
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command_runner: &'a C,
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}
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impl<'a, C: CommandRunner, T: AsRef<str>> GitCheckout<'a, C, T> {
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pub fn new(target: T, source: &'a str, branch: &'a str, command_runner: &'a C) -> Self {
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GitCheckout {
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target,
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source,
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branch,
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command_runner,
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}
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}
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}
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impl<'a, C: CommandRunner, T: AsRef<str>> fmt::Display for GitCheckout<'a, C, T> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(
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f,
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"Checkout {} (branch {}) into {}",
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self.source,
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self.branch,
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self.target.as_ref()
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)
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}
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}
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use std::fs::metadata;
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impl<'a, C: CommandRunner, T: AsRef<str>> GitCheckout<'a, C, T> {
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fn _run_in_target_repo(&self, args: &[&str]) -> Result<Vec<u8>, Box<dyn Error>> {
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let mut new_args = vec!["-C", self.target.as_ref()];
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new_args.extend_from_slice(args);
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self.command_runner.get_output("git", &new_args)
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}
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}
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impl<'a, C: CommandRunner, T: AsRef<str>> Symbol for GitCheckout<'a, C, T> {
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fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
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if let Err(e) = metadata(self.target.as_ref()) {
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return if e.kind() == io::ErrorKind::NotFound {
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Ok(false)
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} else {
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Err(Box::new(e))
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};
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}
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try!(self._run_in_target_repo(&["fetch", self.source, self.branch]));
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// git rev-list resolves tag objects
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let fetch_head = try!(self._run_in_target_repo(&["rev-list", "-1", "FETCH_HEAD"]));
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let head = try!(self._run_in_target_repo(&["rev-list", "-1", "HEAD"]));
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Ok(fetch_head == head)
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}
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fn execute(&self) -> Result<(), Box<dyn Error>> {
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if !Path::new(self.target.as_ref()).exists() {
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return self.command_runner.run_successfully(
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"git",
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&[
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"clone",
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"--depth",
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"1",
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"-b",
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self.branch,
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self.source,
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self.target.as_ref(),
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],
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);
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}
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try!(self._run_in_target_repo(&["fetch", self.source, self.branch]));
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try!(self._run_in_target_repo(&["merge", "FETCH_HEAD"]));
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Ok(())
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}
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fn get_prerequisites(&self) -> Vec<Resource> {
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vec![Resource::new(
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"dir",
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Path::new(self.target.as_ref())
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.parent()
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.unwrap()
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.to_string_lossy(),
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)]
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}
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fn provides(&self) -> Option<Vec<Resource>> {
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Some(vec![Resource::new("dir", self.target.as_ref().to_string())])
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}
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fn as_action<'b>(&'b self, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b> {
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Box::new(SymbolAction::new(runner, self))
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}
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fn into_action<'b>(self: Box<Self>, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b>
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where
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Self: 'b,
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{
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Box::new(OwnedSymbolAction::new(runner, *self))
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}
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}
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#[cfg(test)]
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mod test {}
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