Suppress animation in CI contexts

Fixes #702

Author: ben-edna

CHANGELOG.rst

@@ -1,3 +1,8 @@
+Release 0.11.0 (unreleased)
+====================================
+
+* Don't show animation when running in CI (#702)
+
 Release 0.10.0 (released 2025-03-12)
 ====================================
 

dfetch/project/vcs.py

@@ -35,6 +35,14 @@ def __init__(self, project: dfetch.manifest.project.ProjectEntry) -> None:
         self.__project = project
         self.__metadata = Metadata.from_project_entry(self.__project)
 
+        self._show_animations = not self._running_in_ci()
+
+    @staticmethod
+    def _running_in_ci() -> bool:
+        """Are we running in CI."""
+        ci_env_var = os.getenv('CI', None)
+        return ci_env_var and (ci_env_var.lower().startswith("t") or ci_env_var == "1")
+
     def check_wanted_with_local(self) -> Tuple[Optional[Version], Optional[Version]]:
         """Given the project entry in the manifest, get the relevant version from disk.
 
@@ -109,6 +117,7 @@ def update(self, force: bool = False) -> None:
             text=f"Fetching {self.__project.name} {to_fetch}",
             spinner="dots",
             text_color="green",
+            enabled=self._show_animations
         ):
             actually_fetched = self._fetch_impl(to_fetch)
         self._log_project(f"Fetched {actually_fetched}")
@@ -148,6 +157,7 @@ def check_for_update(self, reporters: Sequence[AbstractCheckReporter]) -> None:
             text=f"Checking {self.__project.name}",
             spinner="dots",
             text_color="green",
+            enabled=self._show_animations
         ):
             latest_version = self._check_for_newer_version()