17170: More helpful message if ARVADOS_* env vars are not set.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>

diff --git a/cmd/arvados-client/container_gateway.go b/cmd/arvados-client/container_gateway.go
index 2d6fd5eec2a54addb75490894ae0edd9085d3e72..6dbc241bca3cb7252f8488a8c061bb43a94aa3c1 100644 (file)
--- a/cmd/arvados-client/container_gateway.go
+++ b/cmd/arvados-client/container_gateway.go
@@ -128,6 +128,10 @@ Options:
                loginUsername = targetUUID[:i]
                targetUUID = targetUUID[i+1:]
        }
+       if os.Getenv("ARVADOS_API_HOST") == "" || os.Getenv("ARVADOS_API_TOKEN") == "" {
+               fmt.Fprintln(stderr, "fatal: ARVADOS_API_HOST and ARVADOS_API_TOKEN environment variables are not set")
+               return 1
+       }
        insecure := os.Getenv("ARVADOS_API_HOST_INSECURE")
        rpcconn := rpc.NewConn("",
                &url.URL{