Fix relative module imports

Fixes #81

Author: ogenstad

changelog/+479a6128.removed.md

@@ -0,0 +1 @@
+Removed previously deprecated InfrahubTransform.init() method

changelog/81.fixed.md

@@ -0,0 +1 @@
+CTL: Fix support for relative imports for transforms and generators

infrahub_sdk/_importer.py

@@ -2,20 +2,26 @@
 
 import importlib
 import sys
+from pathlib import Path
 from typing import TYPE_CHECKING, Optional
 
 from .exceptions import ModuleImportError
 
 if TYPE_CHECKING:
-    from pathlib import Path
     from types import ModuleType
 
+module_mtime_cache: dict[str, float] = {}
+
 
 def import_module(
     module_path: Path, import_root: Optional[str] = None, relative_path: Optional[str] = None
 ) -> ModuleType:
     import_root = import_root or str(module_path.parent)
 
+    file_on_disk = module_path
+    if import_root and relative_path:
+        file_on_disk = Path(import_root, relative_path, module_path.name)
+
     if import_root not in sys.path:
         sys.path.append(import_root)
 
@@ -25,7 +31,21 @@ def import_module(
         module_name = relative_path.replace("/", ".") + f".{module_name}"
 
     try:
-        module = importlib.import_module(module_name)
+        if module_name in sys.modules:
+            module = sys.modules[module_name]
+            current_mtime = file_on_disk.stat().st_mtime
+
+            if module_name in module_mtime_cache:
+                last_mtime = module_mtime_cache[module_name]
+                if current_mtime == last_mtime:
+                    return module
+
+            module_mtime_cache[module_name] = current_mtime
+            module = importlib.reload(module)
+        else:
+            module = importlib.import_module(module_name)
+            module_mtime_cache[module_name] = file_on_disk.stat().st_mtime
+
     except ModuleNotFoundError as exc:
         raise ModuleImportError(message=f"{exc!s} ({module_path})") from exc
     except SyntaxError as exc:

infrahub_sdk/ctl/cli_commands.py

@@ -36,14 +36,13 @@
     parse_cli_vars,
 )
 from ..ctl.validate import app as validate_app
-from ..exceptions import GraphQLError, InfrahubTransformNotFoundError
+from ..exceptions import GraphQLError, ModuleImportError
 from ..jinja2 import identify_faulty_jinja_code
 from ..schema import (
     InfrahubRepositoryConfig,
     MainSchemaTypes,
     SchemaRoot,
 )
-from ..transforms import get_transform_class_instance
 from ..utils import get_branch, write_to_file
 from ..yaml import SchemaFile
 from .exporter import dump
@@ -322,32 +321,22 @@ def transform(
         list_transforms(config=repository_config)
         return
 
-    # Load transform config
-    try:
-        matched = [transform for transform in repository_config.python_transforms if transform.name == transform_name]  # pylint: disable=not-an-iterable
-        if not matched:
-            raise ValueError(f"{transform_name} does not exist")
-    except ValueError as exc:
-        console.print(f"[red]Unable to find requested transform: {transform_name}")
-        list_transforms(config=repository_config)
-        raise typer.Exit(1) from exc
-
-    transform_config = matched[0]
+    transform_config = repository_config.get_python_transform(name=transform_name)
 
     # Get client
     client = initialize_client()
 
     # Get python transform class instance
+
+    relative_path = str(transform_config.file_path.parent) if transform_config.file_path.parent != Path() else None
+
     try:
-        transform = get_transform_class_instance(
-            transform_config=transform_config,
-            branch=branch,
-            client=client,
-        )
-    except InfrahubTransformNotFoundError as exc:
-        console.print(f"Unable to load {transform_name} from python_transforms")
+        transform_class = transform_config.load_class(import_root=str(Path.cwd()), relative_path=relative_path)
+    except ModuleImportError as exc:
+        console.print(f"[red]{exc.message}")
         raise typer.Exit(1) from exc
 
+    transform = transform_class(client=client, branch=branch)
     # Get data
     query_str = repository_config.get_query(name=transform.query).load_query()
     data = asyncio.run(

infrahub_sdk/ctl/generator.py

@@ -1,12 +1,14 @@
 from pathlib import Path
 from typing import Optional
 
+import typer
 from rich.console import Console
 
 from ..ctl import config
 from ..ctl.client import initialize_client
 from ..ctl.repository import get_repository_config
 from ..ctl.utils import execute_graphql_query, parse_cli_vars
+from ..exceptions import ModuleImportError
 from ..node import InfrahubNode
 from ..schema import InfrahubRepositoryConfig
 
@@ -25,17 +27,18 @@ async def run(
         list_generators(repository_config=repository_config)
         return
 
-    matched = [generator for generator in repository_config.generator_definitions if generator.name == generator_name]  # pylint: disable=not-an-iterable
+    generator_config = repository_config.get_generator_definition(name=generator_name)
 
     console = Console()
 
-    if not matched:
-        console.print(f"[red]Unable to find requested generator: {generator_name}")
-        list_generators(repository_config=repository_config)
-        return
+    relative_path = str(generator_config.file_path.parent) if generator_config.file_path.parent != Path() else None
+
+    try:
+        generator_class = generator_config.load_class(import_root=str(Path.cwd()), relative_path=relative_path)
+    except ModuleImportError as exc:
+        console.print(f"[red]{exc.message}")
+        raise typer.Exit(1) from exc
 
-    generator_config = matched[0]
-    generator_class = generator_config.load_class()
     variables_dict = parse_cli_vars(variables)
 
     param_key = list(generator_config.parameters.keys())

infrahub_sdk/ctl/utils.py

@@ -20,6 +20,7 @@
     Error,
     GraphQLError,
     NodeNotFoundError,
+    ResourceNotDefinedError,
     SchemaNotFoundError,
     ServerNotReachableError,
     ServerNotResponsiveError,
@@ -59,7 +60,7 @@ def handle_exception(exc: Exception, console: Console, exit_code: int) -> NoRetu
     if isinstance(exc, GraphQLError):
         print_graphql_errors(console=console, errors=exc.errors)
         raise typer.Exit(code=exit_code)
-    if isinstance(exc, (SchemaNotFoundError, NodeNotFoundError)):
+    if isinstance(exc, (SchemaNotFoundError, NodeNotFoundError, ResourceNotDefinedError)):
         console.print(f"[red]Error: {exc!s}")
         raise typer.Exit(code=exit_code)
 

infrahub_sdk/exceptions.py

@@ -87,6 +87,14 @@ def __str__(self) -> str:
         """
 
 
+class ResourceNotDefinedError(Error):
+    """Raised when trying to access a resource that hasn't been defined."""
+
+    def __init__(self, message: Optional[str] = None):
+        self.message = message or "The requested resource was not found"
+        super().__init__(self.message)
+
+
 class InfrahubCheckNotFoundError(Error):
     def __init__(self, name: str, message: Optional[str] = None):
         self.message = message or f"The requested InfrahubCheck '{name}' was not found."

infrahub_sdk/schema.py

@@ -11,9 +11,16 @@
 from typing_extensions import TypeAlias
 
 from ._importer import import_module
-from .exceptions import InvalidResponseError, ModuleImportError, SchemaNotFoundError, ValidationError
+from .exceptions import (
+    InvalidResponseError,
+    ModuleImportError,
+    ResourceNotDefinedError,
+    SchemaNotFoundError,
+    ValidationError,
+)
 from .generator import InfrahubGenerator
 from .graphql import Mutation
+from .transforms import InfrahubTransform
 from .utils import duplicates
 
 if TYPE_CHECKING:
@@ -120,6 +127,21 @@ class InfrahubPythonTransformConfig(InfrahubRepositoryConfigElement):
     file_path: Path = Field(..., description="The file within the repository with the transform code.")
     class_name: str = Field(default="Transform", description="The name of the transform class to run.")
 
+    def load_class(
+        self, import_root: Optional[str] = None, relative_path: Optional[str] = None
+    ) -> type[InfrahubTransform]:
+        module = import_module(module_path=self.file_path, import_root=import_root, relative_path=relative_path)
+
+        if self.class_name not in dir(module):
+            raise ModuleImportError(message=f"The specified class {self.class_name} was not found within the module")
+
+        transform_class = getattr(module, self.class_name)
+
+        if not issubclass(transform_class, InfrahubTransform):
+            raise ModuleImportError(message=f"The specified class {self.class_name} is not an Infrahub Transform")
+
+        return transform_class
+
 
 class InfrahubRepositoryGraphQLConfig(InfrahubRepositoryConfigElement):
     model_config = ConfigDict(extra="forbid")
@@ -189,7 +211,7 @@ def _get_resource(
         for item in getattr(self, RESOURCE_MAP[resource_type]):
             if getattr(item, resource_field) == resource_id:
                 return item
-        raise KeyError(f"Unable to find {resource_id!r} in {RESOURCE_MAP[resource_type]!r}")
+        raise ResourceNotDefinedError(f"Unable to find {resource_id!r} in {RESOURCE_MAP[resource_type]!r}")
 
     def has_jinja2_transform(self, name: str) -> bool:
         return self._has_resource(resource_id=name, resource_type=InfrahubJinja2TransformConfig)

infrahub_sdk/transforms.py

@@ -3,18 +3,17 @@
 import asyncio
 import importlib
 import os
-import warnings
 from abc import abstractmethod
 from typing import TYPE_CHECKING, Any, Optional
 
 from git import Repo
 
-from . import InfrahubClient
-from .exceptions import InfrahubTransformNotFoundError
+from .exceptions import InfrahubTransformNotFoundError, UninitializedError
 
 if TYPE_CHECKING:
     from pathlib import Path
 
+    from . import InfrahubClient
     from .schema import InfrahubPythonTransformConfig
 
 INFRAHUB_TRANSFORM_VARIABLE_TO_IMPORT = "INFRAHUB_TRANSFORMS"
@@ -48,25 +47,10 @@ def __init__(
 
     @property
     def client(self) -> InfrahubClient:
-        if not self._client:
-            self._client = InfrahubClient(address=self.server_url)
+        if self._client:
+            return self._client
 
-        return self._client
-
-    @classmethod
-    async def init(cls, client: Optional[InfrahubClient] = None, *args: Any, **kwargs: Any) -> InfrahubTransform:
-        """Async init method, If an existing InfrahubClient client hasn't been provided, one will be created automatically."""
-        warnings.warn(
-            f"{cls.__class__.__name__}.init has been deprecated and will be removed in the version after Infrahub SDK 1.0.0",
-            DeprecationWarning,
-            stacklevel=1,
-        )
-        if client:
-            kwargs["client"] = client
-
-        item = cls(*args, **kwargs)
-
-        return item
+        raise UninitializedError("The client has not been initialized")
 
     @property
     def branch_name(self) -> str:

tests/unit/ctl/test_transform_app.py

@@ -62,7 +62,7 @@ def test_transform_not_exist_in_infrahub_yml(tags_transform_dir: str) -> None:
         transform_name = "not_existing_transform"
         with change_directory(tags_transform_dir):
             output = runner.invoke(app, ["transform", transform_name, "tag=red"])
-            assert f"Unable to find requested transform: {transform_name}" in output.stdout
+            assert f"Unable to find '{transform_name}'" in strip_color(output.stdout)
             assert output.exit_code == 1
 
     @staticmethod
@@ -77,7 +77,7 @@ def test_transform_python_file_not_defined(tags_transform_dir: str) -> None:
         transform_name = "tags_transform"
         with change_directory(tags_transform_dir):
             output = runner.invoke(app, ["transform", transform_name, "tag=red"])
-            assert f"Unable to load {transform_name} from python_transforms" in output.stdout
+            assert "No module named 'tags_transform' (tags_transform.py)" in strip_color(output.stdout)
             assert output.exit_code == 1
 
     @staticmethod
@@ -97,7 +97,7 @@ def test_transform_python_class_not_defined(tags_transform_dir: str) -> None:
         transform_name = "tags_transform"
         with change_directory(tags_transform_dir):
             output = runner.invoke(app, ["transform", transform_name, "tag=red"])
-            assert f"Unable to load {transform_name} from python_transforms" in output.stdout
+            assert "The specified class TagsTransform was not found within the module" in output.stdout
             assert output.exit_code == 1
 
     @staticmethod