update jenkins Updatecenter from CLI

gistfile1.txt

$ java -jar jenkins-cli.jar -s http://localhost:9000 install-plugin findbugs
findbugs is neither a valid file, URL, nor a plugin artifact name in the update center
No update center data is retrieved yet from: http://updates.jenkins-ci.org/update-center.json
findbugs looks like a short plugin name. Did you mean 'null'?


# Specifying a full URL works!
$  java -jar jenkins-cli.jar -s http://localhost:9020 install-plugin http://updates.jenkins-ci.org/download/plugins/AdaptivePlugin/0.1/AdaptivePlugin.hpi

# Get the update center ourself
$ wget -O default.js http://updates.jenkins-ci.org/update-center.json

# remove first and last line javascript wrapper
sed '1d;$d' default.js > default.json

# Now push it to the update URL
curl -X POST -H "Accept: application/json" -d @default.json http://localhost:9020/updateCenter/byId/default/postBack --verbose
* About to connect() to localhost port 9020 (#0)
*   Trying ::1... connected
* Connected to localhost (::1) port 9020 (#0)
> POST /updateCenter/byId/default/postBack HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3
> Host: localhost:9020
> Accept: application/json
> Content-Length: 253822
> Content-Type: application/x-www-form-urlencoded
> Expect: 100-continue
>
* Done waiting for 100-continue
< HTTP/1.1 200 OK
< Server: Winstone Servlet Engine v0.9.10
< Content-Type: text/plain;charset=UTF-8
< Connection: Close
< Date: Fri, 01 Apr 2011 13:03:41 GMT
< X-Powered-By: Servlet/2.5 (Winstone/0.9.10)

# Now it finds the plugin by name
$ java -jar jenkins-cli.jar -s http://localhost:9020 install-plugin findbugs
Installing findbugs from update center

$  java -jar jenkins-cli.jar -s http://localhost:9020 safe-restart
hudson.lifecycle.RestartNotSupportedException: Restart is not supported on Mac OS X

$ java -jar jenkins-cli.jar -s http://localhost:9020 reload-configuration

It's really god damn perfect!!!
I'm using curl -L http://updates.jenkins-ci.org/update-center.json | sed '1d;$d' | curl -u username:password X POST -H 'Accept: application/json' -d @- http://localhost:8080/updateCenter/byId/default/postBack

curl -L http://updates.jenkins-ci.org/update-center.json | sed '1d;$d' | curl -u username:password X POST -H 'Accept: application/json' -d @- http://localhost:8080/updateCenter/byId/default/postBack
Why is this necessary? http://updates.jenkins-ci.org/update-center.json is the default update site that comes ofb.
@marslo since you replied most recently. Any insight would be appreciated

No need to do the sed if you get the actual json file from: https://updates.jenkins.io/current/update-center.actual.json

If you go to https://updates.jenkins.io/, there are actually some helpful instructions on how to get the file and get it for your particular installed version of jenkins. That's important because new versions of plugins can be incompatible with the stable versions of jenkins.