implement sync

.gitignore

@@ -1 +1,2 @@
 /target
+.idea

src/command.rs

@@ -35,6 +35,8 @@ pub enum Commands {
     List {},
     #[clap(alias = "c")]
     Change {},
+    #[clap(alias = "ss")]
+    Sync {},
     Base {},
     Up {},
     Down {},

src/main.rs

@@ -38,6 +38,7 @@ fn main() -> Result<()> {
         Some(Commands::Add { name }) => ctx.add_to_stack(name)?,
         Some(Commands::List {}) => ctx.list()?,
         Some(Commands::Change {}) => ctx.change()?,
+        Some(Commands::Sync {}) => ctx.sync()?,
         Some(Commands::Up {}) => ctx.checkout_above()?,
         Some(Commands::Down {}) => ctx.checkout_below()?,
         Some(Commands::Base {}) => ctx.checkout_base()?,
@@ -233,6 +234,21 @@ impl GsContext {
         Ok(())
     }
 
+    fn sync(&self) -> Result<()> {
+        let branches = &self.current_stack().unwrap().branches;
+        for (i, branch) in branches.clone().iter().enumerate() {
+            let rebase_on = match i {
+                0 => &self.current_stack().unwrap().base_branch,
+                _ => &branches[i - 1],
+            };
+            self.repo.rebase(
+                BranchName::from_str(branch)?,
+                BranchName::from_str(rebase_on)?,
+            )?;
+        }
+        Ok(())
+    }
+
     fn reset(&mut self) -> Result<()> {
         let mut deleted = 0;
         self.state

src/repo_extensions.rs

@@ -6,11 +6,19 @@ use rustygit::{types::BranchName, Repository};
 
 pub trait RepoExtenstions {
     fn current_branch(&self) -> Result<BranchName>;
+    fn rebase(&self, branch: BranchName, on: BranchName) -> Result<()>;
 }
 
 impl RepoExtenstions for Repository {
     fn current_branch(&self) -> Result<BranchName> {
         let branches = self.cmd_out(&["rev-parse", "--abbrev-ref", "HEAD"])?;
         Ok(BranchName::from_str(branches.first().unwrap())?)
     }
+
+    fn rebase(&self, branch: BranchName, on: BranchName) -> Result<()> {
+        self.switch_branch(&branch)?;
+        let output = self.cmd_out(&["rebase", "--update-refs", on.to_string().as_str()])?;
+        println!("{:?}", output);
+        Ok(())
+    }
 }