Fix vcs packages are reinstalled when same commit version is already installed

clearml_agent/commands/worker.py

@@ -2804,7 +2804,7 @@ class Worker(ServiceCommandSection):
                 if self._session.debug_mode and temp_file:
                     rm_file(temp_file.name)
             # call post installation callback
-            requirements_manager.post_install(self._session)
+            requirements_manager.post_install(self._session, package_manager=package_api)
             # mark as successful installation
             repo_requirements_installed = True
 

clearml_agent/helper/package/conda_api.py

@@ -424,7 +424,7 @@ class CondaAPI(PackageManager):
             finally:
                 PackageManager._selected_manager = self
 
-        self.requirements_manager.post_install(self.session)
+        self.requirements_manager.post_install(self.session, package_manager=self)
 
     def load_requirements(self, requirements):
         # if we are in read only mode, do not uninstall anything
@@ -642,7 +642,7 @@ class CondaAPI(PackageManager):
             finally:
                 PackageManager._selected_manager = self
 
-        self.requirements_manager.post_install(self.session)
+        self.requirements_manager.post_install(self.session, package_manager=self)
         return True
 
     def _parse_conda_result_bad_packges(self, result_dict):

clearml_agent/helper/package/external_req.py

@@ -46,11 +46,10 @@ class ExternalRequirements(SimpleSubstitution):
         post_install_req = self.post_install_req
         self.post_install_req = []
         for req in post_install_req:
-            try:
+            if self.is_already_installed(req):
-                freeze_base = PackageManager.out_of_scope_freeze() or ''
+                print("No need to reinstall \'{}\' from VCS, "
-            except:
+                      "the exact same version is already installed".format(req.name))
-                freeze_base = ''
+                continue
-
             req_line = self._add_vcs_credentials(req, session)
 
             # if we have older pip version we have to make sure we replace back the package name with the

clearml_agent/helper/package/pip_api/venv.py

@@ -39,7 +39,7 @@ class VirtualenvPip(SystemPip, PackageManager):
         if isinstance(requirements, dict) and requirements.get("pip"):
             requirements["pip"] = self.requirements_manager.replace(requirements["pip"])
         super(VirtualenvPip, self).load_requirements(requirements)
-        self.requirements_manager.post_install(self.session)
+        self.requirements_manager.post_install(self.session, package_manager=self)
 
     def create_flags(self):
         """

clearml_agent/helper/package/requirements.py

@@ -179,7 +179,7 @@ class MarkerRequirement(object):
             if self.remove_local_file_ref():
                 # print warning
                 logging.getLogger(__name__).warning(
-                    'Local file not found [{}], references removed !'.format(line))
+                    'Local file not found [{}], references removed'.format(line))
 
 
 class SimpleVersion:
@@ -437,6 +437,7 @@ class RequirementSubstitution(object):
         self.config = session.config  # type: ConfigTree
         self.suffix = '.post{config[agent.cuda_version]}.dev{config[agent.cudnn_version]}'.format(config=self.config)
         self.package_manager = self.config['agent.package_manager.type']
+        self._is_already_installed_cb = None
 
     @abstractmethod
     def match(self, req):  # type: (MarkerRequirement) -> bool
@@ -452,6 +453,20 @@ class RequirementSubstitution(object):
         """
         pass
 
+    def set_is_already_installed_cb(self, cb):
+        self._is_already_installed_cb = cb
+
+    def is_already_installed(self, req):
+        if not self._is_already_installed_cb:
+            return False
+        # noinspection PyBroadException
+        try:
+            return self._is_already_installed_cb(req)
+        except BaseException as ex:
+            # debug could not resolve something
+            print("Warning: Requirements post install callback exception (check if package installed): {}".format(ex))
+            return False
+
     def post_scan_add_req(self):  # type: () -> Optional[MarkerRequirement]
         """
         Allows the RequirementSubstitution to add an extra line/requirements after
@@ -562,6 +577,7 @@ class RequirementsManager(object):
                                                  cache_dir=pip_cache_dir.as_posix())
         self._base_interpreter = base_interpreter
         self._cwd = None
+        self._installed_parsed_packages = set()
 
     def register(self, cls):  # type: (Type[RequirementSubstitution]) -> None
         self.handlers.append(cls(self._session))
@@ -619,7 +635,9 @@ class RequirementsManager(object):
 
         return join_lines(result)
 
-    def post_install(self, session):
+    def post_install(self, session, package_manager=None):
+        if package_manager:
+            self.update_installed_packages_state(package_manager.freeze())
         for h in self.handlers:
             try:
                 h.post_install(session)
@@ -641,6 +659,34 @@ class RequirementsManager(object):
     def get_interpreter(self):
         return self._base_interpreter
 
+    def update_installed_packages_state(self, requirements):
+        """
+        Updates internal Installed Packages objects, so that later we can detect
+        if we already have a pre-installed package
+        :param requirements: is the output of a freeze() call, i.e. dict {'pip': "package==version"}
+        """
+        requirements = requirements if not isinstance(requirements, dict) else requirements.get("pip")
+        self._installed_parsed_packages = self.parse_requirements_section_to_marker_requirements(
+                requirements=requirements, cwd=self._cwd)
+        for h in self.handlers:
+            h.set_is_already_installed_cb(self._callback_is_already_installed)
+
+    def _callback_is_already_installed(self, req):
+        for p in (self._installed_parsed_packages or []):
+            if p.name != req.name:
+                continue
+            # if this is version control package, only return true of both installed and requests specify commit ID
+            if req.vcs:
+                return p.vcs and req.revision and req.revision == p.revision
+
+            if not req.specs and not p.specs:
+                return True
+
+            # return if this is the same version
+            return req.specs and p.specs and req.compare_version(p, op="==")
+
+        return False
+
     @staticmethod
     def get_cuda_version(config):  # type: (ConfigTree) -> (Text, Text)
         # we assume os.environ already updated the config['agent.cuda_version'] & config['agent.cudnn_version']