Commit 04e861af authored by Jason Lenny's avatar Jason Lenny

Add new section describing usage in exclusion scenario

parent 55cb4bc9
......@@ -56,6 +56,49 @@ The same tag is shown on the pipeline's details:
![Pipeline's details](img/pipeline_detail.png)
## Making all jobs run for your MR pipelines
The behavior of the `only: merge_requests` rule is such that _only_ jobs with
that rule are run in the context of a merge request; no other jobs will be run.
This behavior may not be intuitive when you want all of your jobs to run _except_
for one or two. Consider the following pipeline, with jobs A B and C. If you want
all pipelines to always run A and B, but only want C to run for a merge request,
you can set things up like this to make that work:
``` yaml
.only-default: &only-default
only:
- master
- merge_requests
- tags
A:
<<: *only-default
script:
- ...
B:
<<: *only-default
script:
- ...
C:
script:
- ...
only:
- merge_requests
```
Since A and B are getting the `only:` rule to execute in all cases, they will
always run. C specifies that it should only run for merge requests, so for any
pipeline except a merge request pipeline, it will not run.
As you can see, this will help you avoid a lot of boilerplate where you'd need
to add that only rule to all of your jobs in order to make them always run. You
can use this for scenarios like having only pipelines with merge requests get a
Review App set up, helping to save resources.
## Important notes about merge requests from forked projects
Note that the current behavior is subject to change. In the usual contribution
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