Add ephemeral server (#265)

Author: caroljung-cg

src/codegen/runner/sandbox/ephemeral_server.py

@@ -0,0 +1,29 @@
+import logging
+import tempfile
+
+from fastapi import FastAPI
+
+from codegen.runner.models.apis import (
+    RUN_ON_STRING_ENDPOINT,
+    GetRunOnStringRequest,
+    GetRunOnStringResult,
+)
+from codegen.runner.sandbox.executor import SandboxExecutor
+from codegen.sdk.codebase.factory.get_session import get_codebase_session
+from codegen.sdk.enums import ProgrammingLanguage
+from codegen.shared.compilation.string_to_code import create_execute_function_from_codeblock
+
+logger = logging.getLogger(__name__)
+app = FastAPI()
+
+
+@app.post(RUN_ON_STRING_ENDPOINT)
+async def run_on_string(request: GetRunOnStringRequest) -> GetRunOnStringResult:
+    logger.info(f"====[ run_on_string ]====\n> Codemod source: {request.codemod_source}\n> Input: {request.files}\n> Language: {request.language}\n")
+    language = ProgrammingLanguage(request.language.upper())
+    with get_codebase_session(tmpdir=tempfile.mkdtemp(), files=request.files, programming_language=language) as codebase:
+        executor = SandboxExecutor(codebase)
+        code_to_exec = create_execute_function_from_codeblock(codeblock=request.codemod_source)
+        result = await executor.execute(code_to_exec)
+        logger.info(f"Result: {result}")
+        return GetRunOnStringResult(result=result)