tasks: adapt PyInstaller to support "strictdoc server" command

Closes #835

Author: stanislaw

tasks.py

@@ -496,6 +496,14 @@ def release_pyinstaller(context):
     # """
     # Solution found here:
     # https://stackoverflow.com/a/64473931/598057
+    #
+    # The --hidden-import strictdoc.server.app flag is needed because without
+    # it, the following is produced:
+    # ERROR: Error loading ASGI app. Could not import
+    # module "strictdoc.server.app".
+    # Solution found here: https://stackoverflow.com/a/71340437/598057
+    # This behavior is not surprising because that's how the uvicorn loads the
+    # application separately from the parent process.
     command = f"""
         pip install pyinstaller &&
         pyinstaller
@@ -504,6 +512,7 @@ def release_pyinstaller(context):
             --noconfirm
             --additional-hooks-dir developer/pyinstaller_hooks
             --distpath {path_to_pyi_dist}
+            --hidden-import strictdoc.server.app
             --add-data strictdoc/export/html/templates:templates/html
             --add-data strictdoc/export/rst/templates:templates/rst
             --add-data strictdoc/export/html/_static:_static

tests/unit_server/strictdoc/server/01_hello_world/test_01_hello_world.py

@@ -2,6 +2,7 @@
 
 from fastapi.testclient import TestClient
 
+from strictdoc import environment
 from strictdoc.cli.cli_arg_parser import ServerCommandConfig
 from strictdoc.core.project_config import ProjectConfig
 from strictdoc.server.app import create_app
@@ -11,6 +12,7 @@
 
 def test_get_document():
     config = ServerCommandConfig(
+        environment=environment,
         input_path=PATH_TO_THIS_TEST_FOLDER,
         output_path=os.path.join(PATH_TO_THIS_TEST_FOLDER, "output"),
         reload=False,

tests/unit_server/strictdoc/server/02_export_document_to_reqif/test_02_export_document_to_reqif.py

@@ -4,6 +4,7 @@
 
 from fastapi.testclient import TestClient
 
+from strictdoc import environment
 from strictdoc.cli.cli_arg_parser import ServerCommandConfig
 from strictdoc.core.project_config import ProjectConfig
 from strictdoc.server.app import create_app
@@ -16,6 +17,7 @@ def test_export_document_to_reqif():
     shutil.rmtree(PATH_TO_OUTPUT_FOLDER, ignore_errors=True)
 
     config = ServerCommandConfig(
+        environment=environment,
         input_path=PATH_TO_THIS_TEST_FOLDER,
         output_path=PATH_TO_OUTPUT_FOLDER,
         reload=False,