feature(source cronjobs): Implementation of CronJobSource management

Contains create/delete/update/describe but not tests yet.

Still todo:

* Think how to provide a namespace for the sink
* Support for more sinks
* Synchronous mode for create & update
* Add list (or implement "source list")

docs/cmd/kn.md

@@ -27,6 +27,6 @@ Manage your Knative building blocks:
 * [kn revision](kn_revision.md)	 - Revision command group
 * [kn route](kn_route.md)	 - Route command group
 * [kn service](kn_service.md)	 - Service command group
-* [kn source](kn_source.md)	 - Event Source command group
+* [kn source](kn_source.md)	 - Event source command group
 * [kn version](kn_version.md)	 - Prints the client version
 

docs/cmd/kn_source.md

@@ -1,10 +1,10 @@
 ## kn source
 
-Event Source command group
+Event source command group
 
 ### Synopsis
 
-Event Source command group
+Event source command group
 
 ```
 kn source [flags]
@@ -28,5 +28,6 @@ kn source [flags]
 
 * [kn](kn.md)	 - Knative client
 * [kn source apiserver](kn_source_apiserver.md)	 - Kubernetes API Server Event Source command group
+* [kn source cronjob](kn_source_cronjob.md)	 - Cronjob source command group
 * [kn source list-types](kn_source_list-types.md)	 - List available source types
 

docs/cmd/kn_source_apiserver.md

@@ -26,7 +26,7 @@ kn source apiserver [flags]
 
 ### SEE ALSO
 
-* [kn source](kn_source.md)	 - Event Source command group
+* [kn source](kn_source.md)	 - Event source command group
 * [kn source apiserver create](kn_source_apiserver_create.md)	 - Create an ApiServerSource, which watches for Kubernetes events and forwards them to a sink
 * [kn source apiserver delete](kn_source_apiserver_delete.md)	 - Delete an ApiServerSource.
 

docs/cmd/kn_source_cronjob.md

@@ -0,0 +1,34 @@
+## kn source cronjob
+
+Cronjob source command group
+
+### Synopsis
+
+Cronjob source command group
+
+```
+kn source cronjob [flags]
+```
+
+### Options
+
+```
+  -h, --help   help for cronjob
+```
+
+### Options inherited from parent commands
+
+```
+      --config string       kn config file (default is $HOME/.kn/config.yaml)
+      --kubeconfig string   kubectl config file (default is $HOME/.kube/config)
+      --log-http            log http traffic
+```
+
+### SEE ALSO
+
+* [kn source](kn_source.md)	 - Event source command group
+* [kn source cronjob create](kn_source_cronjob_create.md)	 - Create a Cronjob source.
+* [kn source cronjob delete](kn_source_cronjob_delete.md)	 - Delete a Cronjob source.
+* [kn source cronjob describe](kn_source_cronjob_describe.md)	 - Describe a Cronjob source.
+* [kn source cronjob update](kn_source_cronjob_update.md)	 - Update a Cronjob source.
+

docs/cmd/kn_source_cronjob_create.md

@@ -0,0 +1,42 @@
+## kn source cronjob create
+
+Create a Cronjob source.
+
+### Synopsis
+
+Create a Cronjob source.
+
+```
+kn source cronjob create NAME --schedule SCHEDULE --sink SINK --data DATA [flags]
+```
+
+### Examples
+
+```
+
+  # Create a crontab scheduler 'my-cron-trigger' which fires every minute and sends 'ping' to service 'mysvc' as a cloudevent
+  kn source cronjob create my-cron-trigger --schedule "* * * * */1" --data "ping" --sink svc:mysvc
+```
+
+### Options
+
+```
+  -d, --data string        String data to send
+  -h, --help               help for create
+  -n, --namespace string   Specify the namespace to operate in.
+      --schedule string    Schedule specification in crontab format (e.g. '* * * * */2' for every two minutes
+  -s, --sink string        Addressable sink for events
+```
+
+### Options inherited from parent commands
+
+```
+      --config string       kn config file (default is $HOME/.kn/config.yaml)
+      --kubeconfig string   kubectl config file (default is $HOME/.kube/config)
+      --log-http            log http traffic
+```
+
+### SEE ALSO
+
+* [kn source cronjob](kn_source_cronjob.md)	 - Cronjob source command group
+

docs/cmd/kn_source_cronjob_delete.md

@@ -0,0 +1,39 @@
+## kn source cronjob delete
+
+Delete a Cronjob source.
+
+### Synopsis
+
+Delete a Cronjob source.
+
+```
+kn source cronjob delete NAME [flags]
+```
+
+### Examples
+
+```
+
+  # Delete a CronJob source 'my-cron-trigger'
+  kn source cronjob delete my-cron-trigger
+```
+
+### Options
+
+```
+  -h, --help               help for delete
+  -n, --namespace string   Specify the namespace to operate in.
+```
+
+### Options inherited from parent commands
+
+```
+      --config string       kn config file (default is $HOME/.kn/config.yaml)
+      --kubeconfig string   kubectl config file (default is $HOME/.kube/config)
+      --log-http            log http traffic
+```
+
+### SEE ALSO
+
+* [kn source cronjob](kn_source_cronjob.md)	 - Cronjob source command group
+

docs/cmd/kn_source_cronjob_describe.md

@@ -0,0 +1,40 @@
+## kn source cronjob describe
+
+Describe a Cronjob source.
+
+### Synopsis
+
+Describe a Cronjob source.
+
+```
+kn source cronjob describe NAME [flags]
+```
+
+### Examples
+
+```
+
+  # Describe a cronjob source with name 'my-cron-trigger'
+  kn source cronjob describe my-cron-trigger
+```
+
+### Options
+
+```
+  -h, --help               help for describe
+  -n, --namespace string   Specify the namespace to operate in.
+  -v, --verbose            More output.
+```
+
+### Options inherited from parent commands
+
+```
+      --config string       kn config file (default is $HOME/.kn/config.yaml)
+      --kubeconfig string   kubectl config file (default is $HOME/.kube/config)
+      --log-http            log http traffic
+```
+
+### SEE ALSO
+
+* [kn source cronjob](kn_source_cronjob.md)	 - Cronjob source command group
+

docs/cmd/kn_source_cronjob_update.md

@@ -0,0 +1,42 @@
+## kn source cronjob update
+
+Update a Cronjob source.
+
+### Synopsis
+
+Update a Cronjob source.
+
+```
+kn source cronjob update NAME --schedule SCHEDULE --sink SERVICE --data DATA [flags]
+```
+
+### Examples
+
+```
+
+  # Update the schedule of a crontab source 'my-cron-trigger' to fire every minute
+  kn source cronjob update my-cron-trigger --schedule "* * * * */1"
+```
+
+### Options
+
+```
+  -d, --data string        String data to send
+  -h, --help               help for update
+  -n, --namespace string   Specify the namespace to operate in.
+      --schedule string    Schedule specification in crontab format (e.g. '* * * * */2' for every two minutes
+  -s, --sink string        Addressable sink for events
+```
+
+### Options inherited from parent commands
+
+```
+      --config string       kn config file (default is $HOME/.kn/config.yaml)
+      --kubeconfig string   kubectl config file (default is $HOME/.kube/config)
+      --log-http            log http traffic
+```
+
+### SEE ALSO
+
+* [kn source cronjob](kn_source_cronjob.md)	 - Cronjob source command group
+

docs/cmd/kn_source_list-types.md

@@ -42,5 +42,5 @@ kn source list-types [flags]
 
 ### SEE ALSO
 
-* [kn source](kn_source.md)	 - Event Source command group
+* [kn source](kn_source.md)	 - Event source command group