Add load/save context commands

docs/source/user/commands.rst

@@ -38,6 +38,16 @@ Show information on available commands.
 
 Add files to context.
 
+/load [context file path]
+------------
+
+Load context from a file.
+
+/save [context file path]
+------------
+
+Save context to a file.
+
 /redo
 -----
 

mentat/code_context.py

@@ -434,3 +434,29 @@ async def search(
             return all_features_sorted
         else:
             return all_features_sorted[:max_results]
+
+    def to_simple_context_dict(self) -> dict[str, list[str]]:
+        """Return a simple dictionary representation of the code context"""
+
+        simple_dict: dict[str, list[str]] = {}
+        for path, features in self.include_files.items():
+            simple_dict[str(path.absolute())] = [str(feature) for feature in features]
+        return simple_dict
+
+    def from_simple_context_dict(self, simple_dict: dict[str, list[str]]):
+        """Load the code context from a simple dictionary representation"""
+
+        for path_str, features_str in simple_dict.items():
+            path = Path(path_str)
+            features_for_path: List[CodeFeature] = []
+
+            for feature_str in features_str:
+                feature_path = Path(feature_str)
+
+                # feature_path is already absolute, so cwd doesn't matter
+                current_features = get_code_features_for_path(
+                    feature_path, cwd=Path("/")
+                )
+                features_for_path += list(current_features)
+
+            self.include_files[path] = features_for_path

mentat/command/commands/__init__.py

@@ -10,9 +10,11 @@
 from .exclude import ExcludeCommand
 from .help import HelpCommand
 from .include import IncludeCommand
+from .load import LoadCommand
 from .redo import RedoCommand
 from .run import RunCommand
 from .sample import SampleCommand
+from .save import SaveCommand
 from .screenshot import ScreenshotCommand
 from .search import SearchCommand
 from .talk import TalkCommand

mentat/command/commands/load.py

@@ -0,0 +1,69 @@
+import json
+from pathlib import Path
+from typing import List
+
+from typing_extensions import override
+
+from mentat.auto_completer import get_command_filename_completions
+from mentat.command.command import Command, CommandArgument
+from mentat.errors import PathValidationError
+from mentat.session_context import SESSION_CONTEXT
+from mentat.utils import mentat_dir_path
+
+
+class LoadCommand(Command, command_name="load"):
+    @override
+    async def apply(self, *args: str) -> None:
+        session_context = SESSION_CONTEXT.get()
+        stream = session_context.stream
+        code_context = session_context.code_context
+        context_file_path = mentat_dir_path / "context.json"
+
+        if len(args) > 1:
+            stream.send(
+                "Only one context file can be loaded at a time", style="warning"
+            )
+            return
+
+        if args:
+            path_arg = args[0]
+            try:
+                context_file_path = Path(path_arg).expanduser().resolve()
+            except RuntimeError as e:
+                raise PathValidationError(
+                    f"Invalid context file path provided: {path_arg}: {e}"
+                )
+
+        try:
+            with open(context_file_path, "r") as file:
+                parsed_include_files = json.load(file)
+        except FileNotFoundError:
+            stream.send(f"Context file not found at {context_file_path}", style="error")
+            return
+        except json.JSONDecodeError as e:
+            stream.send(
+                f"Failed to parse context file at {context_file_path}: {e}",
+                style="error",
+            )
+            return
+
+        code_context.from_simple_context_dict(parsed_include_files)
+
+        stream.send(f"Context loaded from {context_file_path}", style="success")
+
+    @override
+    @classmethod
+    def arguments(cls) -> List[CommandArgument]:
+        return [CommandArgument("optional", ["path"])]
+
+    @override
+    @classmethod
+    def argument_autocompletions(
+        cls, arguments: list[str], argument_position: int
+    ) -> list[str]:
+        return get_command_filename_completions(arguments[-1])
+
+    @override
+    @classmethod
+    def help_message(cls) -> str:
+        return "Loads a context file."

mentat/command/commands/save.py

@@ -0,0 +1,56 @@
+import json
+from pathlib import Path
+from typing import List
+
+from typing_extensions import override
+
+from mentat.auto_completer import get_command_filename_completions
+from mentat.command.command import Command, CommandArgument
+from mentat.errors import PathValidationError
+from mentat.session_context import SESSION_CONTEXT
+from mentat.utils import mentat_dir_path
+
+
+class SaveCommand(Command, command_name="save"):
+    @override
+    async def apply(self, *args: str) -> None:
+        session_context = SESSION_CONTEXT.get()
+        stream = session_context.stream
+        code_context = session_context.code_context
+        context_file_path = mentat_dir_path / "context.json"
+
+        if len(args) > 1:
+            stream.send("Only one context file can be saved at a time", style="warning")
+            return
+
+        if len(args) == 1:
+            try:
+                context_file_path = Path(args[0]).expanduser().resolve()
+            except RuntimeError as e:
+                raise PathValidationError(
+                    f"Invalid context file path provided: {args[0]}: {e}"
+                )
+
+        serializable_context = code_context.to_simple_context_dict()
+
+        with open(context_file_path, "w") as file:
+            json.dump(serializable_context, file)
+
+        stream.send(f"Context saved to {context_file_path}", style="success")
+
+    @override
+    @classmethod
+    def arguments(cls) -> List[CommandArgument]:
+        return [CommandArgument("optional", ["path"])]
+
+    @override
+    @classmethod
+    def argument_autocompletions(
+        cls, arguments: list[str], argument_position: int
+    ) -> list[str]:
+        return get_command_filename_completions(arguments[-1])
+
+    @override
+    @classmethod
+    def help_message(cls) -> str:
+        return "Saves the current context to a file."

mentat/interval.py

@@ -63,3 +63,18 @@ def __str__(self) -> str:
             return f"{self.start}"
         else:
             return f"{self.start}-{self.end}"
+
+    @staticmethod
+    def from_string(interval_string: str) -> Interval:
+        print("interval_string:", interval_string)
+        try:
+            interval_parts = interval_string.split("-")
+        except ValueError:
+            return Interval(1, INTERVAL_FILE_END)
+
+        if len(interval_parts) != 2:
+            # corrupt interval string, make it whole file
+            return Interval(1, INTERVAL_FILE_END)
+
+        start, end = interval_parts
+        return Interval(int(start), int(end))

mentat/session_stream.py

@@ -34,8 +34,8 @@ class SessionStream:
     default: Any data sent to the client over this channel should be displayed. Valid kwargs: color, style
 
     *session_exit: Sent by the client, suggesting that the session should exit whenever possible.
-    client_exit: Sent by the server, client should shut down when recieved.
-    session_stopped: Sent by the server directly before server shuts down. Server can't be contacted after recieved.
+    client_exit: Sent by the server, client should shut down when received.
+    session_stopped: Sent by the server directly before server shuts down. Server can't be contacted after received.
 
     loading: Used to tell the client to display a loading bar. Valid kwargs: terminate
 

tests/commands_test.py

@@ -1,3 +1,4 @@
+import json
 import subprocess
 from pathlib import Path
 from textwrap import dedent
@@ -7,6 +8,7 @@
 from mentat.code_feature import CodeFeature
 from mentat.command.command import Command, InvalidCommand
 from mentat.command.commands.help import HelpCommand
+from mentat.interval import Interval
 from mentat.session import Session
 from mentat.session_context import SESSION_CONTEXT
 
@@ -80,6 +82,104 @@ async def test_exclude_command(temp_testbed, mock_collect_user_input):
     assert not code_context.include_files
 
 
+@pytest.mark.asyncio
+async def test_save_command(temp_testbed, mock_collect_user_input):
+    default_context_path = "context.json"
+    mock_collect_user_input.set_stream_messages(
+        [
+            "/include scripts",
+            f"/save {default_context_path}",
+            "q",
+        ]
+    )
+
+    session = Session(cwd=temp_testbed)
+    session.start()
+    await session.stream.recv(channel="client_exit")
+
+    saved_code_context: dict[str, list[str]] = json.load(open(default_context_path))
+    calculator_script_path = Path(temp_testbed) / "scripts" / "calculator.py"
+    assert str(calculator_script_path) in (saved_code_context.keys())
+    assert [str(calculator_script_path)] in (saved_code_context.values())
+
+
+@pytest.mark.asyncio
+async def test_load_command_success(temp_testbed, mock_collect_user_input):
+    scripts_dir = Path(temp_testbed) / "scripts"
+    features = [
+        CodeFeature(scripts_dir / "calculator.py", Interval(1, 10)),
+        CodeFeature(scripts_dir / "echo.py"),
+    ]
+    context_file_path = "context.json"
+
+    context_file_data = {}
+    with open(context_file_path, "w") as f:
+        for feature in features:
+            context_file_data[str(feature.path)] = [str(feature)]
+
+        json.dump(context_file_data, f)
+
+    mock_collect_user_input.set_stream_messages(
+        [
+            f"/load {context_file_path}",
+            "q",
+        ]
+    )
+
+    session = Session(cwd=temp_testbed)
+    session.start()
+    await session.stream.recv(channel="client_exit")
+
+    code_context = SESSION_CONTEXT.get().code_context
+
+    assert scripts_dir / "calculator.py" in code_context.include_files.keys()
+    assert code_context.include_files[scripts_dir / "calculator.py"] == [
+        CodeFeature(scripts_dir / "calculator.py", Interval(1, 10)),
+    ]
+    assert scripts_dir / "echo.py" in code_context.include_files.keys()
+    assert code_context.include_files[scripts_dir / "echo.py"] == [
+        CodeFeature(scripts_dir / "echo.py"),
+    ]
+
+
+@pytest.mark.asyncio
+async def test_load_command_file_not_found(temp_testbed, mock_collect_user_input):
+    context_file_path = "context-f47e7a1c-84a2-40a9-9e40-255f976d3223.json"
+
+    mock_collect_user_input.set_stream_messages(
+        [
+            f"/load {context_file_path}",
+            "q",
+        ]
+    )
+
+    session = Session(cwd=temp_testbed)
+    session.start()
+    await session.stream.recv(channel="client_exit")
+
+    assert "Context file not found" in session.stream.messages[4].data
+
+
+@pytest.mark.asyncio
+async def test_load_command_invalid_json(temp_testbed, mock_collect_user_input):
+    context_file_path = "context.json"
+    with open(context_file_path, "w") as f:
+        f.write("invalid json")
+
+    mock_collect_user_input.set_stream_messages(
+        [
+            f"/load {context_file_path}",
+            "q",
+        ]
+    )
+
+    session = Session(cwd=temp_testbed)
+    session.start()
+    await session.stream.recv(channel="client_exit")
+
+    assert "Failed to parse context file" in session.stream.messages[4].data
+
+
 @pytest.mark.asyncio
 async def test_undo_command(temp_testbed, mock_collect_user_input, mock_call_llm_api):
     temp_file_name = "temp.py"