surendranaidu/cron-resource repository overview

⁠Crontab Resource

Implements a resource that reports new versions when the current time matches the crontab expression

⁠Update your pipeline

Update your pipeline to include this new declaration of resource types. See the example pipeline yml snippet below or the Concourse docs for more details here.

---

resource_types:

• name: cron-resource type: docker-image source: repository: cftoolsmiths/cron-resource

resources:

• name: 10-min-trigger type: cron-resource source: expression: "*/10 * * * *" location: "America/New_York" fire_immediately: true Source Configuration

---

expression: Required. The crontab expression:

field allowed values minute 0-59 hour 0-23 day of month 1-31 month 1-12 (or names, see below) day of week 0-7 (0 or 7 is Sun, or use names) e.g.

0 23 * * 1-5 # Run at 11:00pm from Monday to Friday

location: Optional. Defaults to UTC. Accepts any timezone that can be parsed by https://godoc.org/time#LoadLocation⁠

e.g.

America/New_York

America/Vancouver

fire_immediately: Optional. Defaults to false. Immediately triggers the resource the first time it is checked.

⁠Behavior

check: Report the current time. Returns time.Now() as the version only if a minute since we last fired matches the crontab expression. The first time the script runs it will fire if a minute in the last hour matches the crontab expression.

Parameters None.

in: Report the given time If triggered by check, returns the original version as the resulting version.

⁠Parameters Output directory. The directory where the in script will store the requested version out: Not implemented. Developer Notes

Building the jobs To build the resource's go binaries, run the following command from within the cron-resource directory:

docker run -v "$PWD":/go/src/github.com/pivotal-cf-experimental/cron-resource/
-it golang:1.7
/bin/bash /go/src/github.com/pivotal-cf-experimental/cron-resource/build_in_docker_container.sh You should see two new binaries named built-in and built-check.

Testing the go binaries Start an interactive session of your docker container to run the binaries:

docker run -v "$PWD":/go/src/github.com/pivotal-cf-experimental/cron-resource/
-it golang:1.7
/bin/sh Within the interactive session:

cd /go/src/github.com/pivotal-cf-experimental/cron-resource/ ./built-check It looks like it hangs, but it's waiting for you to enter some JSON:

{"source":{"expression":"* * * * *","location":"America/New_York"} } # Paste this in after running ./built-check [{"time":"2016-08-19T10:15:27.183011117-04:00"}] # This is the successful output