cleanup: remove dummy diff provider, it's the exact same as not having one

helix-vcs/src/git/test.rs

@@ -2,7 +2,7 @@ use std::{fs::File, io::Write, path::Path, process::Command};
 
 use tempfile::TempDir;
 
-use crate::Git;
+use crate::git::Git;
 
 fn exec_git_cmd(args: &str, git_dir: &Path) {
     let res = Command::new("git")

helix-vcs/src/lib.rs

@@ -1,15 +1,10 @@
-use anyhow::{anyhow, bail, Result};
+use anyhow::{anyhow, Result};
 use arc_swap::ArcSwap;
 use std::{
     path::{Path, PathBuf},
     sync::Arc,
 };
 
-#[cfg(feature = "git")]
-pub use git::Git;
-#[cfg(not(feature = "git"))]
-pub use Dummy as Git;
-
 #[cfg(feature = "git")]
 mod git;
 
@@ -21,33 +16,6 @@ mod status;
 
 pub use status::FileChange;
 
-#[doc(hidden)]
-#[derive(Clone, Copy)]
-pub struct Dummy;
-impl Dummy {
-    fn get_diff_base(&self, _file: &Path) -> Result<Vec<u8>> {
-        bail!("helix was compiled without git support")
-    }
-
-    fn get_current_head_name(&self, _file: &Path) -> Result<Arc<ArcSwap<Box<str>>>> {
-        bail!("helix was compiled without git support")
-    }
-
-    fn for_each_changed_file(
-        &self,
-        _cwd: &Path,
-        _f: impl Fn(Result<FileChange>) -> bool,
-    ) -> Result<()> {
-        bail!("helix was compiled without git support")
-    }
-}
-
-impl From<Dummy> for DiffProvider {
-    fn from(value: Dummy) -> Self {
-        DiffProvider::Dummy(value)
-    }
-}
-
 #[derive(Clone)]
 pub struct DiffProviderRegistry {
     providers: Vec<DiffProvider>,
@@ -104,7 +72,10 @@ impl Default for DiffProviderRegistry {
     fn default() -> Self {
         // currently only git is supported
         // TODO make this configurable when more providers are added
-        let providers = vec![Git.into()];
+        let providers = vec![
+            #[cfg(feature = "git")]
+            git::Git.into(),
+        ];
         DiffProviderRegistry { providers }
     }
 }
@@ -113,15 +84,13 @@ impl Default for DiffProviderRegistry {
 /// cloning [DiffProviderRegistry] as `Clone` cannot be used in trait objects.
 #[derive(Clone)]
 pub enum DiffProvider {
-    Dummy(Dummy),
     #[cfg(feature = "git")]
-    Git(Git),
+    Git(git::Git),
 }
 
 impl DiffProvider {
     fn get_diff_base(&self, file: &Path) -> Result<Vec<u8>> {
         match self {
-            Self::Dummy(inner) => inner.get_diff_base(file),
             #[cfg(feature = "git")]
             Self::Git(inner) => inner.get_diff_base(file),
         }
@@ -129,7 +98,6 @@ impl DiffProvider {
 
     fn get_current_head_name(&self, file: &Path) -> Result<Arc<ArcSwap<Box<str>>>> {
         match self {
-            Self::Dummy(inner) => inner.get_current_head_name(file),
             #[cfg(feature = "git")]
             Self::Git(inner) => inner.get_current_head_name(file),
         }
@@ -141,7 +109,6 @@ impl DiffProvider {
         f: impl Fn(Result<FileChange>) -> bool,
     ) -> Result<()> {
         match self {
-            Self::Dummy(inner) => inner.for_each_changed_file(cwd, f),
             #[cfg(feature = "git")]
             Self::Git(inner) => inner.for_each_changed_file(cwd, f),
         }