fix editor command hanging, add --preview flag for msg read cmd

src/email/message/command/read.rs

@@ -11,7 +11,9 @@ use crate::{
 
 /// Read a message.
 ///
-/// This command allows you to read a message.
+/// This command allows you to read a message. When reading a message,
+/// the "seen" flag is automatically applied to the corresponding
+/// envelope. To prevent this behaviour, use the --preview flag.
 #[derive(Debug, Parser)]
 pub struct MessageReadCommand {
     #[command(flatten)]
@@ -20,6 +22,11 @@ pub struct MessageReadCommand {
     #[command(flatten)]
     pub envelopes: EnvelopeIdsArgs,
 
+    /// Read the message without applying the "seen" flag to its
+    /// corresponding envelope.
+    #[arg(long, short)]
+    pub preview: bool,
+
     /// Read the raw version of the given message.
     ///
     /// The raw message represents the headers and the body as it is
@@ -79,7 +86,11 @@ impl MessageReadCommand {
         let backend = Backend::new(toml_account_config, account_config.clone(), false).await?;
 
         let ids = &self.envelopes.ids;
-        let emails = backend.get_messages(&folder, &ids).await?;
+        let emails = if self.preview {
+            backend.peek_messages(&folder, &ids).await
+        } else {
+            backend.get_messages(&folder, &ids).await
+        }?;
 
         let mut glue = "";
         let mut bodies = String::default();

src/ui/editor.rs

@@ -6,7 +6,7 @@ use email::{
 };
 use log::debug;
 use mml::MmlCompilerBuilder;
-use process::Cmd;
+use process::SingleCmd;
 use std::{env, fs};
 
 use crate::{
@@ -23,7 +23,8 @@ pub async fn open_with_tpl(tpl: String) -> Result<String> {
 
     debug!("open editor");
     let editor = env::var("EDITOR").context("cannot get editor from env var")?;
-    Cmd::from(format!("{editor} {}", &path.to_string_lossy()))
+    SingleCmd::from(format!("{editor} {}", &path.to_string_lossy()))
+        .with_output_piped(false)
         .run()
         .await
         .context("cannot launch editor")?;