split out proxmox-backup-debug binary

and introduce pbs_tools::cli module

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

pbs-tools/src/cli.rs

@@ -0,0 +1,13 @@
+use std::fs::File;
+use std::io::{self, stdout, Write};
+use std::path::Path;
+
+/// Returns either a new file, if a path is given, or stdout, if no path is given.
+pub fn outfile_or_stdout<P: AsRef<Path>>(path: Option<P>) -> io::Result<Box<dyn Write>> {
+    if let Some(path) = path {
+        let f = File::create(path)?;
+        Ok(Box::new(f) as Box<dyn Write>)
+    } else {
+        Ok(Box::new(stdout()) as Box<dyn Write>)
+    }
+}

pbs-tools/src/lib.rs

@@ -4,6 +4,7 @@ pub mod blocking;
 pub mod borrow;
 pub mod broadcast_future;
 pub mod cert;
+pub mod cli;
 pub mod compression;
 pub mod format;
 pub mod fs;