cli: add jj describe --no-edit to not open editor

CHANGELOG.md

@@ -56,7 +56,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   been moved from `jj debug` to `jj support`.
 
 * `jj describe` now supports `--reset-author` for resetting a commit's author
-  to the configured user.
+  to the configured user. `jj describe` also gained a `--no-edit` option to
+  avoid opening the editor.
 
 ### Fixed bugs
 

src/commands/mod.rs

@@ -413,6 +413,11 @@ struct DescribeArgs {
     /// Read the change description from stdin
     #[arg(long)]
     stdin: bool,
+    /// Don't open an editor
+    ///
+    /// This is mainly useful in combination with e.g. `--reset-author`.
+    #[arg(long)]
+    no_edit: bool,
     /// Reset the author to the configured user
     ///
     /// This resets the author name, email, and timestamp.
@@ -1807,6 +1812,8 @@ fn cmd_describe(
         buffer
     } else if let Some(message) = &args.message {
         message.into()
+    } else if args.no_edit {
+        commit.description().to_owned()
     } else {
         let template = description_template_for_commit(&workspace_command, &commit)?;
         edit_description(workspace_command.repo(), &template, command.settings())?

tests/test_describe_command.rs

@@ -177,7 +177,7 @@ fn test_describe_author() {
             "--config-toml",
             r#"user.name = "Ove Ridder"
             user.email = "ove.ridder@example.com""#,
-            "-m=description",
+            "--no-edit",
             "--reset-author",
         ],
     );