Simplify lock acquire

Currently we are acquiring 3 locks.
We should only have 2 (we can't have only one because of readthedocs#5672)

Author: stsewd

readthedocs/projects/tasks.py

@@ -560,11 +560,12 @@ def run_build(self, docker, record):
             )
 
             try:
-                self.setup_python_environment()
+                with self.project.repo_nonblockinglock(version=self.version):
+                    self.setup_python_environment()
 
-                # TODO the build object should have an idea of these states,
-                # extend the model to include an idea of these outcomes
-                outcomes = self.build_docs()
+                    # TODO the build object should have an idea of these states,
+                    # extend the model to include an idea of these outcomes
+                    outcomes = self.build_docs()
             except vcs_support_utils.LockTimeout as e:
                 self.task.retry(exc=e, throw=False)
                 raise VersionLockedError
@@ -912,19 +913,18 @@ def setup_python_environment(self):
         """
         self.build_env.update_build(state=BUILD_STATE_INSTALLING)
 
-        with self.project.repo_nonblockinglock(version=self.version):
-            # Check if the python version/build image in the current venv is the
-            # same to be used in this build and if it differs, wipe the venv to
-            # avoid conflicts.
-            if self.python_env.is_obsolete:
-                self.python_env.delete_existing_venv_dir()
-            else:
-                self.python_env.delete_existing_build_dir()
+        # Check if the python version/build image in the current venv is the
+        # same to be used in this build and if it differs, wipe the venv to
+        # avoid conflicts.
+        if self.python_env.is_obsolete:
+            self.python_env.delete_existing_venv_dir()
+        else:
+            self.python_env.delete_existing_build_dir()
 
-            self.python_env.setup_base()
-            self.python_env.save_environment_json()
-            self.python_env.install_core_requirements()
-            self.python_env.install_requirements()
+        self.python_env.setup_base()
+        self.python_env.save_environment_json()
+        self.python_env.install_core_requirements()
+        self.python_env.install_requirements()
 
     def build_docs(self):
         """
@@ -941,12 +941,11 @@ def build_docs(self):
         before_build.send(sender=self.version)
 
         outcomes = defaultdict(lambda: False)
-        with self.project.repo_nonblockinglock(version=self.version):
-            outcomes['html'] = self.build_docs_html()
-            outcomes['search'] = self.build_docs_search()
-            outcomes['localmedia'] = self.build_docs_localmedia()
-            outcomes['pdf'] = self.build_docs_pdf()
-            outcomes['epub'] = self.build_docs_epub()
+        outcomes['html'] = self.build_docs_html()
+        outcomes['search'] = self.build_docs_search()
+        outcomes['localmedia'] = self.build_docs_localmedia()
+        outcomes['pdf'] = self.build_docs_pdf()
+        outcomes['epub'] = self.build_docs_epub()
 
         after_build.send(sender=self.version)
         return outcomes