scripts/osmocom-api-doxygen: check ssh early

Check for working SSH right at the start of the job, so we don't need to
wait 2 minutes until it has built everything to find it out.

Change-Id: Id93c15d38a49859dc63d39f70f051a7df871c398
---
M scripts/osmocom-api-doxygen.sh
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/scripts/osmocom-api-doxygen.sh b/scripts/osmocom-api-doxygen.sh
index 765b7fb..cfa5e61 100755
--- a/scripts/osmocom-api-doxygen.sh
+++ b/scripts/osmocom-api-doxygen.sh
@@ -1,4 +1,6 @@
 #!/bin/sh -ex
+SSH_CMD="ssh -o UserKnownHostsFile=/build/contrib/known_hosts -p 48"
+
 # Repositories for which doxygen documentation will be generated and
 # uploaded, also dependencies which need to be built
 repos_api="
@@ -13,6 +15,9 @@
 # Source common.sh from osmo-ci.git for osmo_git_clone_url()
 . scripts/common.sh
 
+# Check early that SSH works
+$SSH_CMD api@ftp.osmocom.org -T -- true
+
 # Put git repos and install data in a subdir, so it isn't in the root
 # of the cloned osmo-ci.git repository
 mkdir _osmocom_api
@@ -45,7 +50,7 @@
 	rsync \
 		-avz \
 		--delete \
-		-e "ssh -o UserKnownHostsFile=/build/contrib/known_hosts -p 48" \
+		-e "$SSH_CMD" \
 		./"$i"/doc/ \
 		api@ftp.osmocom.org:web-files/latest/"$i"/
 done

