fix(bump): correctly generate tag with prefix

src/git/tag.rs

@@ -106,7 +106,7 @@ pub struct Tag {
 impl TryFrom<Git2Tag<'_>> for Tag {
     type Error = anyhow::Error;
 
-    fn try_from(tag: Git2Tag) -> std::prelude::rust_2015::Result<Self, Self::Error> {
+    fn try_from(tag: Git2Tag) -> std::result::Result<Self, Self::Error> {
         let name = tag.name().expect("Unexpected unnamed tag");
         Self::new(name, Some(tag.id()))
     }

src/lib.rs

@@ -452,7 +452,10 @@ impl CocoGitto {
             next_version.pre = Prerelease::new(pre_release)?;
         }
 
-        let version_str = next_version.to_string();
+        let version_str = match &SETTINGS.tag_prefix {
+            None => next_version.to_string(),
+            Some(prefix) => format!("{}{}", prefix, next_version),
+        };
 
         let origin = if current_version == Version::new(0, 0, 0) {
             self.repository.get_first_commit()?.to_string()
@@ -484,6 +487,7 @@ impl CocoGitto {
             &next_version,
             hooks_config,
         );
+
         self.repository.add_all()?;
 
         // Hook failed, we need to stop here and reset

tests/cog_tests/bump.rs

@@ -69,6 +69,30 @@ fn auto_bump_major_from_latest_tag() -> Result<()> {
     })
 }
 
+#[test]
+fn auto_bump_with_prefix() -> Result<()> {
+    run_test_with_context(|context| {
+        let mut command = Command::cargo_bin("cog")?;
+
+        command.arg("bump").arg("--auto");
+        git_init()?;
+        std::fs::write(context.test_dir.join("cog.toml"), "tag_prefix = \"v\"")?;
+        git_commit("chore: init")?;
+        git_commit("feat(taef): feature")?;
+        git_commit("fix: bug fix")?;
+        git_tag("v1.0.0")?;
+        git_commit("feat(taef)!: feature")?;
+        git_commit("feat!: feature 1")?;
+        git_commit("feat: feature 2")?;
+
+        command.assert().success();
+
+        assert_that(&context.test_dir.join("CHANGELOG.md")).exists();
+        assert_tag("v2.0.0")?;
+        Ok(())
+    })
+}
+
 #[test]
 fn auto_bump_patch_from_latest_tag() -> Result<()> {
     run_test_with_context(|context| {