@tinevez The tricky part is adding the encrypted env vars. IIRC, I pasted you the shell script I use here on gitter in the past. I cannot make it public because it has the two env var values embedded.
I could put the script in a private repo and then give trusted folks like yourself read access. The tokens/passwords in question let you 1. deploy anything to the ImageJ Maven repo; and 2. Trigger an ImageJ Jenkis job which reacts to Travis builds.
Simpler is for me to just file a PR against TrackAnalysis adding the Travis config.
Some day, perhaps everyone will deploy somewhere more general like bintray or OSS sonatype, using thr own credentials, and this problem will disappear.
@ctrueden I don't know if you remember: I recently started my own update site but wasn't able to upload anything and I didn't see any error messages. I just tried again after updating my FIJI and it worked. So that is not an issue anymore.