feat: libra add revert subcommand.

aria/contents/docs/libra/command/revert/index.mdx

@@ -0,0 +1,44 @@
+---
+title: The [revert] Command
+description: Create a new commit that reverts the changes of an existing commit
+---
+
+### Usage
+
+libra revert [OPTIONS] <COMMIT>
+
+### Arguments
+
+- <COMMIT> - (Required) The commit to revert. Can be a commit hash, branch name, or a reference like HEAD.
+
+### Description
+
+Given one existing commit, this command creates a new commit that applies the inverse of the changes introduced by the specified commit. This effectively "undoes" the target commit.
+
+Unlike libra reset, which alters the existing commit history, libra revert does not change the project history. Instead, it adds a new commit at the tip of the branch with the inverted content. This makes it a safe operation for reverting changes on a public or shared branch, as it preserves the original history.
+
+By default, a new commit is created with a message indicating which commit was reverted.
+
+This implementation does not support reverting merge commits. The command must be run from a branch, not a 'detached HEAD' state.
+
+### Options
+
+- -n, --no-commit
+  Performs the revert operation by applying the inverse changes to the working directory and index, but does not create a new commit. The changes will be staged, allowing you to inspect or modify them before committing manually.
+- -h, --help
+  Print help
+### Example
+- libra revert HEAD~2
+
+  Creates a new commit that undoes the changes made two commits before the current HEAD.
+
+- libra revert -n a1b2c3d4
+
+  Applies the inverse of the changes from commit a1b2c3d4 to the index, but does not commit them, leaving them staged.
+
+
+<Note type="note" title="Note">
+    All parameters should align with Git’s behavior as closely as possible, but
+    there may be some differences. Refs https://git-scm.com/docs/git-branch for
+    more information.
+</Note>

ceres/src/api_service/mono_api_service.rs

@@ -149,7 +149,7 @@ impl ApiHandler for MonoApiService {
             })
             .collect();
         storage.batch_save_model(save_trees).await.unwrap();
-        
+
         Ok(())
     }
 

libra/src/cli.rs

@@ -63,7 +63,8 @@ enum Commands {
     Pull(command::pull::PullArgs),
     #[command(about = "Show different between files")]
     Diff(command::diff::DiffArgs),
-
+    #[command(about = "Revert some existing commits")]
+    Revert(command::revert::RevertArgs),
     #[command(subcommand, about = "Manage set of tracked repositories")]
     Remote(command::remote::RemoteCmds),
     #[command(about = "Manage repository configurations")]
@@ -125,6 +126,7 @@ pub async fn parse_async(args: Option<&[&str]>) -> Result<(), GitError> {
         Commands::IndexPack(args) => command::index_pack::execute(args),
         Commands::Fetch(args) => command::fetch::execute(args).await,
         Commands::Diff(args) => command::diff::execute(args).await,
+        Commands::Revert(args) => command::revert::execute(args).await,
         Commands::Remote(cmd) => command::remote::execute(cmd).await,
         Commands::Pull(args) => command::pull::execute(args).await,
         Commands::Config(args) => command::config::execute(args).await,

libra/src/command/mod.rs

@@ -17,6 +17,7 @@ pub mod remote;
 pub mod remove;
 pub mod reset;
 pub mod restore;
+pub mod revert;
 pub mod status;
 pub mod switch;
 
@@ -46,13 +47,13 @@ where
 }
 
 // impl save for all objects
-pub fn save_object<T>(object: &T, ojb_id: &SHA1) -> Result<(), GitError>
+pub fn save_object<T>(object: &T, obj_id: &SHA1) -> Result<(), GitError>
 where
     T: ObjectTrait,
 {
     let storage = util::objects_storage();
     let data = object.to_data()?;
-    storage.put(ojb_id, &data, object.get_type())?;
+    storage.put(obj_id, &data, object.get_type())?;
     Ok(())
 }