Adds --allow-already-editable flag to spfs edit commands

This flag stops spfs edit from exiting with an error when the runtime
environment is already editable.

Signed-off-by: David Gilligan-Cook <dcook@imageworks.com>

crates/spfs-cli/main/src/cmd_edit.rs

@@ -4,6 +4,7 @@
 
 use clap::Args;
 use miette::Result;
+use spfs::Error;
 
 /// Make the current runtime editable
 #[derive(Debug, Args)]
@@ -15,6 +16,10 @@ pub struct CmdEdit {
     /// Change a runtime into a durable runtime, will also make the runtime editable
     #[clap(long)]
     keep_runtime: bool,
+
+    /// Do not exit with an error when the runtime environment is already editable
+    #[clap(long)]
+    allow_already_editable: bool,
 }
 
 impl CmdEdit {
@@ -37,16 +42,19 @@ impl CmdEdit {
         if !self.off {
             match spfs::make_active_runtime_editable().await {
                 Ok(_) => tracing::info!("edit mode enabled"),
-                Err(err) => {
-                    if self.keep_runtime {
-                        // When --keep-runtime was also given, being
-                        // already editable isn't an error, but still
-                        // want to tell the user about it
-                        tracing::info!("{err}")
+                Err(Error::RuntimeAlreadyEditable) => {
+                    if self.keep_runtime || self.allow_already_editable {
+                        // When these options are given, being already
+                        // editable isn't an error, but still want to
+                        // tell the user about it
+                        tracing::info!("{}", Error::RuntimeAlreadyEditable)
                     } else {
-                        return Err(err.into());
+                        return Err(Error::RuntimeAlreadyEditable.into());
                     }
                 }
+                Err(err) => {
+                    return Err(err.into());
+                }
             };
         } else {
             let mut rt = spfs::active_runtime().await?;