feat: edit body for commit messages

src/prompts/prompter.rs

@@ -9,7 +9,7 @@ use inquire::{Confirm, Text};
 use unicode_width::UnicodeWidthStr;
 
 use crate::{
-    commit::types::{BreakingChange, CommitType, Description, Scope},
+    commit::types::{Body, BreakingChange, CommitType, Description, Scope},
     error::Error,
 };
 
@@ -30,6 +30,9 @@ pub trait Prompter: Send + Sync {
     /// Prompt the user for breaking change
     fn input_breaking_change(&self) -> Result<BreakingChange, Error>;
 
+    /// Prompt the user to optionally add a free-form body via an external editor
+    fn input_body(&self) -> Result<Body, Error>;
+
     /// Prompt the user to confirm applying the commit message
     fn confirm_apply(&self, message: &str) -> Result<bool, Error>;
 
@@ -176,6 +179,38 @@ impl Prompter for RealPrompts {
         Ok(trimmed.into())
     }
 
+    fn input_body(&self) -> Result<Body, Error> {
+        use inquire::Editor;
+
+        let wants_body = Confirm::new("Add a body?")
+            .with_default(false)
+            .prompt()
+            .map_err(|_| Error::Cancelled)?;
+
+        if !wants_body {
+            return Ok(Body::default());
+        }
+
+        let template = "\
+JJ: Body (optional). Markdown is supported.\n\
+JJ: Wrap prose lines at 72 characters where possible.\n\
+JJ: Lines starting with \"JJ:\" will be removed.\n";
+
+        let raw = Editor::new("Body:")
+            .with_predefined_text(template)
+            .with_file_extension(".md")
+            .prompt()
+            .map_err(|_| Error::Cancelled)?;
+
+        let stripped: String = raw
+            .lines()
+            .filter(|line| !line.starts_with("JJ:"))
+            .collect::<Vec<_>>()
+            .join("\n");
+
+        Ok(Body::from(stripped))
+    }
+
     fn confirm_apply(&self, message: &str) -> Result<bool, Error> {
         use inquire::Confirm;