Add error handling for case where user does not have git installed (#3179) (#3198)

(cherry picked from commit 5ecba6b13c)

InvenTree/plugin/helpers.py

@@ -114,6 +114,9 @@ def get_git_log(path):
                 output = output.split('\n')
         except subprocess.CalledProcessError:  # pragma: no cover
             pass
+        except FileNotFoundError:  # pragma: no cover
+            # Most likely the system does not have 'git' installed
+            pass
 
     if not output:
         output = 7 * ['']  # pragma: no cover
@@ -129,6 +132,9 @@ def check_git_version():
         output = str(subprocess.check_output(['git', '--version'], cwd=os.path.dirname(settings.BASE_DIR)), 'utf-8')
     except subprocess.CalledProcessError:  # pragma: no cover
         return False
+    except FileNotFoundError:  # pragma: no cover
+        # Most likely the system does not have 'git' installed
+        return False
 
     # process version string
     try:

InvenTree/plugin/registry.py

@@ -231,6 +231,9 @@ class PluginsRegistry:
         except subprocess.CalledProcessError as error:  # pragma: no cover
             logger.error(f'Ran into error while trying to install plugins!\n{str(error)}')
             return False
+        except FileNotFoundError:  # pragma: no cover
+            # System most likely does not have 'git' installed
+            return False
 
         logger.info(f'plugin requirements were run\n{output}')