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README: Document that stages have privaete temp dirs

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Lars Karlitski 2019-05-05 23:42:17 +02:00
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@ -37,9 +37,10 @@ modifies a file system tree. Pipelines are defined as JSON files like this one:
`osbuild` runs each of stages in turn, somewhat isolating them into mount and
pid namespaces. It injects the `options` object with a `tree` key pointing to
the file system tree and passes that to the stage via its `stdin`.
Stages may have side effects: the `io.weldr.qcow2` stage in the above example
packs the tree into a `qcow2` image.
the file system tree and passes that to the stage via its `stdin`. Each stage
has private `/tmp` and `/var/tmp` directories that are deleted after the stage
is run. Stages may have side effects: the `io.weldr.qcow2` stage in the above
example packs the tree into a `qcow2` image.
## Running