cli/edit: Minor tweaks

lib/src/cli.rs

@@ -68,8 +68,9 @@ pub(crate) struct SwitchOpts {
 /// Perform an edit operation
 #[derive(Debug, Parser)]
 pub(crate) struct EditOpts {
- /// Path to new system specification; use `-` for stdin
- pub(crate) filename: String,
+ /// Use filename to edit system specification
+ #[clap(long, short = 'f')]
+ pub(crate) filename: Option<String>,
 
  /// Don't display progress
  #[clap(long)]
@@ -426,19 +427,20 @@ async fn edit(opts: EditOpts) -> Result<()> {
  let repo = &sysroot.repo();
  let (booted_deployment, _deployments, host) =
  crate::status::get_status_require_booted(sysroot)?;
- let new_host: Host = if opts.filename == "-" {
+ let new_host: Host = if let Some(filename) = opts.filename {
+ let mut r = std::io::BufReader::new(std::fs::File::open(&filename)?);
+ serde_yaml::from_reader(&mut r)?
+ } else {
  let tmpf = tempfile::NamedTempFile::new()?;
  serde_yaml::to_writer(std::io::BufWriter::new(tmpf.as_file()), &host)?;
  crate::utils::spawn_editor(&tmpf)?;
  tmpf.as_file().seek(std::io::SeekFrom::Start(0))?;
  serde_yaml::from_reader(&mut tmpf.as_file())?
- } else {
- let mut r = std::io::BufReader::new(std::fs::File::open(opts.filename)?);
- serde_yaml::from_reader(&mut r)?
  };
 
  if new_host.spec == host.spec {
- anyhow::bail!("No changes in current host spec");
+ println!("Edit cancelled, no changes made.");
+ return Ok(());
  }
  let new_spec = RequiredHostSpec::from_spec(&new_host.spec)?;
  let fetched = pull(repo, &new_spec.image, opts.quiet).await?;