Use release class

Create it out of the given release_repo.
Thus simplifying the call tree as we only access the release_repo in the
service.

services.py

@@ -1,36 +1,29 @@
 from pathlib import Path
-from infrastructure import ReleaseRepository, GitApi
+from infrastructure import VersionRepository, ReleaseRepository, GitApi
 from domain import Version, ReleaseType
 
-
-# Todo: can be removed
-class InitReleaseService():
-
-    def __init__(self, release_repo: ReleaseRepository):
-        self.release_repo = release_repo
-     
-    def get_version(self):
-        return self.release_repo.get_release().version
-
-
 class PrepareReleaseService():
 
     def __init__(self, release_repo: ReleaseRepository):
         self.release_repo = release_repo
+        self.release = release_repo.get_release()
+        self.git_api = GitApi()
+        self.main_branch = None        
 
     def __write_and_commit_version(self, version: Version, commit_message: str):
-        if self.main_branch != self.git_repository.get_current_branch():
+        if self.main_branch != self.git_api.get_current_branch():
             raise Exception('Trying to release while not on main branch')
         
-        self.version_repository.write_file(version.get_version_string())
-        self.git_repository.add_file(self.config_file)
-        self.git_repository.commit(commit_message)
+        self.release_repo.version_repository.write_file(version.get_version_string())
+        self.git_api.add_file(self.release_repo.version_repository.file)
+        self.git_api.commit(commit_message)     
 
-    def write_and_commit_release(self, release_version: Version):
-        self.__write_and_commit_version(release_version, commit_message=f'Release {release_version.get_version_string()}')
+    def write_and_commit_release(self):
+        self.__write_and_commit_version(self.release.release_version(), commit_message=f'Release {self.release.release_version().get_version_string()}')
 
-    def write_and_commit_bump(self, bump_version: Version):
-         self.__write_and_commit_version(bump_version, commit_message=f'Version bump')
+    def write_and_commit_bump(self):        
+        self.__write_and_commit_version(self.release.bump_version(), commit_message=f'Version bump')
+    
 
 class TagAndPushReleaseService():
     
@@ -41,6 +34,6 @@ class TagAndPushReleaseService():
         annotation = 'v' + release_version.get_version_string()
         message = 'Release ' + annotation
         self.git_api.tag_annotated(annotation, message, 1)
-        # self.git_repository.push()
+        # self.git_api.push()