Merge pull request #46 from UiPath/feat/cli-new

feat: add new cli command

Author: radu-mocanu

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.0.94"
+version = "0.0.95"
 description = "UiPath Langchain"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.10"

src/uipath_langchain/_cli/_templates/langgraph.json.template

@@ -0,0 +1,7 @@
+{
+    "dependencies": ["."],
+    "graphs": {
+      "agent": "./main.py:graph"
+    },
+    "env": ".env"
+  }

src/uipath_langchain/_cli/_templates/main.py.template

@@ -0,0 +1,33 @@
+from langchain_anthropic import ChatAnthropic
+from langchain_core.messages import HumanMessage, SystemMessage
+from langchain_openai import ChatOpenAI
+from langgraph.graph import START, StateGraph, END
+from pydantic import BaseModel
+import os
+
+class GraphInput(BaseModel):
+    topic: str
+
+class GraphOutput(BaseModel):
+    report: str
+
+async def generate_report(state: GraphInput) -> GraphOutput:
+    if os.getenv("ANTHROPIC_API_KEY"):
+        llm_model = ChatAnthropic(model="claude-3-5-sonnet-latest")
+    elif os.getenv("OPENAI_API_KEY"):
+        llm_model = ChatOpenAI(model="gpt-4o-mini", temperature=0)
+    else:
+        raise Exception("Error: Missing API Key. Please define either ANTHROPIC_API_KEY or OPENAI_API_KEY.")
+
+    system_prompt = "You are a report generator. Please provide a brief report based on the given topic."
+    output = await llm_model.ainvoke([SystemMessage(system_prompt), HumanMessage(state.topic)])
+    return GraphOutput(report=output.content)
+
+builder = StateGraph(input=GraphInput, output=GraphOutput)
+
+builder.add_node("generate_report", generate_report)
+
+builder.add_edge(START, "generate_report")
+builder.add_edge("generate_report", END)
+
+graph = builder.compile()

src/uipath_langchain/_cli/cli_new.py

@@ -0,0 +1,76 @@
+import os
+import shutil
+
+import click
+from uipath._cli.middlewares import MiddlewareResult
+from uipath._cli.spinner import Spinner
+
+
+def generate_script(target_directory):
+    template_script_path = os.path.join(
+        os.path.dirname(__file__), "_templates/main.py.template"
+    )
+    target_path = os.path.join(target_directory, "main.py")
+
+    shutil.copyfile(template_script_path, target_path)
+
+    template_langgraph_json_path = os.path.join(
+        os.path.dirname(__file__), "_templates/langgraph.json.template"
+    )
+    target_path = os.path.join(target_directory, "langgraph.json")
+    shutil.copyfile(template_langgraph_json_path, target_path)
+
+
+def generate_pyproject(target_directory, project_name):
+    project_toml_path = os.path.join(target_directory, "pyproject.toml")
+    toml_content = f"""[project]
+                        name = "{project_name}"
+                        version = "0.0.1"
+                        description = "{project_name}"
+                        authors = [{{ name = "John Doe", email = "[email protected]" }}]
+                        dependencies = [
+                            "uipath-langchain>=0.0.95",
+                            "langchain-anthropic>=0.3.8",
+                        ]
+                        requires-python = ">=3.10"
+                    """
+
+    with open(project_toml_path, "w") as f:
+        f.write(toml_content)
+
+
+def langgraph_new_middleware(name: str) -> MiddlewareResult:
+    """Middleware to create demo langchain agent"""
+    spinner = Spinner("Creating demo agent...")
+    directory = os.getcwd()
+
+    try:
+        generate_script(directory)
+        click.echo(click.style("✓ ", fg="green", bold=True) + "Created main.py file")
+        click.echo(
+            click.style("✓ ", fg="green", bold=True) + "Created langgraph.json file"
+        )
+        generate_pyproject(directory, name)
+        click.echo(
+            click.style("✓ ", fg="green", bold=True) + "Created pyproject.toml file"
+        )
+        os.system("uv sync")
+        spinner.start()
+        ctx = click.get_current_context()
+        init_cmd = ctx.parent.command.get_command(ctx, "init")  # type: ignore
+        ctx.invoke(init_cmd)
+        spinner.stop()
+        click.echo(
+            click.style("✓ ", fg="green", bold=True) + " Agent created successfully."
+        )
+        return MiddlewareResult(
+            should_continue=False,
+            info_message="""Usage example: ` uipath run agent '{"topic": "UiPath"}' `""",
+        )
+    except Exception as e:
+        spinner.stop()
+        return MiddlewareResult(
+            should_continue=False,
+            error_message=f"❌ Error creating demo agent {str(e)}",
+            should_include_stacktrace=True,
+        )

src/uipath_langchain/middlewares.py

@@ -1,10 +1,12 @@
 from uipath._cli.middlewares import Middlewares
 
 from ._cli.cli_init import langgraph_init_middleware
+from ._cli.cli_new import langgraph_new_middleware
 from ._cli.cli_run import langgraph_run_middleware
 
 
 def register_middleware():
     """This function will be called by the entry point system when uipath_langchain is installed"""
     Middlewares.register("init", langgraph_init_middleware)
     Middlewares.register("run", langgraph_run_middleware)
+    Middlewares.register("new", langgraph_new_middleware)