DAG-1627 fix evg-module-manager patch crash (#19)

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.1.9 - 2022-01-25
+- Add check for github CLI installation
+
 ## 0.1.8 - 2021-12-29
 - Add support for github pull request
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "evg-module-manager"
-version = "0.1.8"
+version = "0.1.9"
 description = "Manage Evergreen modules locally."
 authors = ["Dev Prod DAG <[email protected]>"]
 license = "Apache-2.0"

src/emm/services/github_service.py

@@ -1,4 +1,5 @@
 """Service for working with github CLI."""
+import shutil
 from pathlib import Path
 from typing import List, Optional
 
@@ -19,6 +20,11 @@ def __init__(self, gh_cli: local) -> None:
     @classmethod
     def create(cls) -> local:
         """Initialize the github cli in command line."""
+        if not shutil.which("gh"):
+            raise SystemExit(
+                "Please make sure you've installed the Github CLI. "
+                "Instructions on how to do so can be found at https://cli.github.com/."
+            )
         return cls(local.cmd.gh)
 
     def pull_request(self, extra_args: List[str], directory: Optional[Path] = None) -> str: