Implement gzip in FSGitRepoStore

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/bridge/repo/FSGitRepoStore.java

@@ -139,6 +139,15 @@ public class FSGitRepoStore implements RepoStore {
         return Tar.bz2.zip(getDotGitForProject(projectName), sizePtr);
     }
 
+    @Override
+    public InputStream gzipProject(
+        String projectName,
+        long[] sizePtr
+    ) throws IOException {
+        Project.checkValidProjectName(projectName);
+        return Tar.gzip.zip(getDotGitForProject(projectName), sizePtr);
+    }
+
     @Override
     public void gcProject(String projectName) throws IOException {
         Project.checkValidProjectName(projectName);
@@ -171,6 +180,25 @@ public class FSGitRepoStore implements RepoStore {
         Tar.bz2.unzip(dataStream, getDirForProject(projectName));
     }
 
+    @Override
+    public void ungzipProject(
+      String projectName,
+      InputStream dataStream
+    ) throws IOException {
+        Preconditions.checkArgument(
+            Project.isValidProjectName(projectName),
+            "[%s] invalid project name: ",
+            projectName
+        );
+        Preconditions.checkState(
+            getDirForProject(projectName).mkdirs(),
+          "[%s] directories for " +
+            "evicted project already exist",
+            projectName
+        );
+        Tar.gzip.unzip(dataStream, getDirForProject(projectName));
+    }
+
     private File getDirForProject(String projectName) {
         Project.checkValidProjectName(projectName);
         return Paths.get(