use default shell on system (#135)

* use default shell on system * add releasenotes for changes in d4b486f
DataDog · Apr 29, 2021 · a32107f · a32107f
1 parent 783fc90
commit a32107f
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diff --git a/releasenotes/notes/use-system-shell-222f6711f7b17dd4.yaml b/releasenotes/notes/use-system-shell-222f6711f7b17dd4.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    source the shell from the system's ``SHELL`` environment variable,
+    if that's missing fall back to ``/bin/bash`` as the default shell.
diff --git a/riot/riot.py b/riot/riot.py
@@ -15,7 +15,7 @@
 
 logger = logging.getLogger(__name__)
 
-SHELL = "/bin/bash"
+SHELL = os.getenv("SHELL", "/bin/bash")
 ENCODING = sys.getdefaultencoding()