From 88fec2a7e4d5a6a7ae88d27c22bc5068803b0d24 Mon Sep 17 00:00:00 2001
From: Edward Shen <code@eddie.sh>
Date: Tue, 9 Mar 2021 11:23:40 -0500
Subject: [PATCH] rename_section

---
 src/file.rs | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/file.rs b/src/file.rs
index b9b6eca..d2938fc 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -743,9 +743,10 @@ impl<'event> GitConfig<'event> {
         section_name: &'lookup str,
         subsection_name: impl Into<Option<&'lookup str>>,
     ) -> Option<SectionBody> {
-        let section_ids =
-            self.get_section_ids_by_name_and_subname(section_name, subsection_name.into());
-        let id = section_ids.ok()?.pop()?;
+        let id = self
+            .get_section_ids_by_name_and_subname(section_name, subsection_name.into())
+            .ok()?
+            .pop()?;
         self.section_order
             .remove(self.section_order.iter().position(|v| *v == id).unwrap());
         self.sections.remove(&id)
@@ -780,6 +781,27 @@ impl<'event> GitConfig<'event> {
             )
         }
     }
+
+    /// Renames a section, modifying the last matching section.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the lookup
+    pub fn rename_section<'lookup>(
+        &mut self,
+        section_name: &'lookup str,
+        subsection_name: impl Into<Option<&'lookup str>>,
+        new_section_name: impl Into<SectionHeaderName<'event>>,
+        new_subsection_name: impl Into<Option<Cow<'event, str>>>,
+    ) -> Result<(), GitConfigError<'lookup>> {
+        let id = self.get_section_ids_by_name_and_subname(section_name, subsection_name.into())?;
+        let id = id.last().unwrap();
+        let header = self.section_headers.get_mut(id).unwrap();
+        header.name = new_section_name.into();
+        header.subsection_name = new_subsection_name.into();
+
+        Ok(())
+    }
 }
 
 /// An intermediate representation of a mutable value obtained from