Support different bash_completition directories.

Author: maraino

debian/step-cli.postinst

@@ -1,7 +1,14 @@
 #!/bin/sh
 
 if [ "$1" = "configure" ]; then
-    update-alternatives \
-        --install /usr/bin/step step /usr/bin/step-cli 50 \
-        --slave /usr/share/bash-completion/completions/step step.bash-completion /usr/share/bash-completion/completions/step-cli
+	if [ -f /usr/share/bash-completion/completions/step-cli ]; then
+		update-alternatives \
+			--install /usr/bin/step step /usr/bin/step-cli 50 \
+			--slave /usr/share/bash-completion/completions/step step.bash-completion /usr/share/bash-completion/completions/step-cli
+	fi
+	if [ -f /etc/bash_completion.d/step-cli ]; then
+		update-alternatives \
+			--install /usr/bin/step step /usr/bin/step-cli 50 \
+			--slave /etc/bash_completion.d/step step.bash-completion /etc/bash_completion.d/step-cli
+	fi
 fi