langgraph-cli-install

libs/cli-install/langgraph_cli_install/__init__.py

@@ -0,0 +1,7 @@
+"""LangGraph CLI Installer package."""
+
+__version__ = "0.1.0"
+
+from .main import main
+
+__all__ = ["main"]

libs/cli-install/langgraph_cli_install/main.py

@@ -0,0 +1,109 @@
+"""LangGraph CLI Installation Script.
+
+Main entry point for installing langgraph-cli in an isolated environment.
+This script uses uv to create an isolated installation of langgraph-cli.
+"""
+
+import platform
+import subprocess
+import sys
+
+import uv
+
+
+def main():
+    """Install langgraph-cli using uv in an isolated environment."""
+    print("Installing LangGraph CLI in an isolated environment...")
+
+    try:
+        uv_bin = uv.find_uv_bin()
+
+        # Get best Python version for installation (prefer 3.12 if available)
+        python_version = get_latest_python_version()
+
+        # Create an isolated environment with langgraph-cli
+        print(f"Creating isolated environment using {python_version}...")
+        subprocess.check_call(
+            [
+                uv_bin,
+                "tool",
+                "install",
+                "--force",
+                "--python",
+                python_version,
+                "langgraph-cli@latest",
+            ]
+        )
+
+        # Update PATH so the tool is available
+        subprocess.check_call([uv_bin, "tool", "update-shell"])
+
+        # Show install location and help
+        show_success_message(uv_bin)
+
+    except subprocess.CalledProcessError as e:
+        print(f"\nFailed to install langgraph-cli: {e}")
+        sys.exit(1)
+    except Exception as e:
+        print(f"\nAn error occurred: {e}")
+        sys.exit(1)
+
+
+def get_latest_python_version() -> str:
+    """Get the latest compatible Python version for installation."""
+    # Try to use Python 3.12 if possible, otherwise fall back to the current version
+    target_version = "3.12"
+    try:
+        # Check if this version is available through uv
+        uv_bin = uv.find_uv_bin()
+        result = subprocess.run(
+            [uv_bin, "python", "list"],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        if "3.12" in result.stdout:
+            return f"python{target_version}"
+    except Exception:
+        pass
+
+    # Fall back to current version
+    major, minor = sys.version_info.major, sys.version_info.minor
+    return f"python{major}.{minor}"
+
+
+def show_success_message(uv_bin):
+    """Show success message and installation details."""
+    # Get installation path
+    result = subprocess.run(
+        [uv_bin, "tool", "list"],
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+
+    install_path = None
+    for line in result.stdout.splitlines():
+        if "langgraph-cli" in line:
+            parts = line.strip().split()
+            if len(parts) >= 2:
+                install_path = parts[1]
+                break
+
+    # Success message
+    print("\n🎉 LangGraph CLI has been successfully installed!\n")
+    print("You can now use it by running:")
+    print("  langgraph --help")
+
+    if install_path:
+        print(f"\nInstalled at: {install_path}")
+
+    # Provide hint about shell restart if needed
+    if platform.system() != "Windows":
+        print("\nNote: You may need to restart your terminal or run:")
+        print("  source ~/.bashrc  # or ~/.zshrc depending on your shell")
+        print("to ensure the langgraph command is available in your PATH.")
+
+
+if __name__ == "__main__":
+    main()