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docs: explain caching for Actions

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Loïc Dachary 2023-07-04 23:28:57 +02:00 committed by Caesar Schinas
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16
admin/actions.md
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@ -209,6 +209,22 @@ host:
workdir_parent:
```
## Cache configuration
Some actions such as https://code.forgejo.org/actions/cache or
https://code.forgejo.org/actions/setup-go can communicate with the
`Forgejo runner` to save and restore commonly used files such as
compilation dependencies. They are stored as compressed tar archives,
fetched when a job starts and saved when it completes.
If the machine has a fast disk, uploading the cache when the job
starts may significantly reduce the bandwidth required to download
and rebuild dependencies.
If the machine on which the `Forgejo runner` is running has a slow
disk and plenty of CPU and bandwidth, it may be better to not activate
the cache as it can slow down the execution time.
## Running the daemon
Once the `Forgejo runner` is successfully registered, it can be run from the directory in which the `.runner` file is found with:

11
user/actions.md
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@ -42,6 +42,17 @@ One of the most commonly used action is [checkout](https://code.forgejo.org/acti
Just as any other program of function, an `Action` has pre-requisites to successfully be installed and run. When looking at re-using an existing `Action`, this is an important consideration. For instance [setup-go](https://code.forgejo.org/actions/setup-go) depends on NodeJS during installation.
## Caching commonly used files
When a `job` starts, it can communicate with the `Forgejo runner` to
fetch commonly used files that were saved by previous runs. For
instance the https://code.forgejo.org/actions/setup-go action will do
that by default to save downloading and compiling packages found in
`go.mod`.
It is also possible to explicitly control what is cached and when
using the https://code.forgejo.org/actions/cache action.
## Services
PostgreSQL, redis and other services can conveniently be run from container images with something similar to (see the [full example](https://code.forgejo.org/actions/setup-forgejo/src/branch/main/testdata/example-service/.forgejo/workflows/test.yml)):