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[DOC] Update readme with section about exported variables

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Thorben Nissen 2020-04-10 20:45:21 +02:00
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README.md
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@ -57,6 +57,20 @@ The `ssh-agent` will load all of the keys and try each one in order when establi
There's one **caveat**, though: SSH servers may abort the connection attempt after a number of mismatching keys have been presented. So if, for example, you have
six different keys loaded into the `ssh-agent`, but the server aborts after five unknown keys, the last key (which might be the right one) will never even be tried.
## Exported variables
The action exports `SSH_AUTH_SOCK` and `SSH_AGENT_PID` through the Github Actions core module.
The `$SSH_AUTH_SOCK` is used by several applications like git or rsync to connect to the SSH authentication agent.
The `$SSH_AGENT_PID` can be used to kill the SSH agent, e.g. when using on a self-hosted runner:
```yaml
jobs:
job_1:
steps:
# ...
- name: Stop SSH agent
run: kill $SSH_AGENT_PID
```
The variables are only available inside the current job.
## Known issues and limitations
### Currently OS X and Linux only