* Adding `--port-file` support
* ``--port-file`` support
* Updating docs
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[JSON API] Add support for ``--port-file`` command line option.
``--http-port 0 --port-file ./json-api.port`` will pick up a free port
and write it into ``./json-api.port` file.
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* reformatting
* Usage grammar
* use bimap
* Adding `PortFiles` utility for creating and deleting port files on JVM exit
* Adding scaladoc explaining that the port file should be deleted on
JVM termination.
* Updating usage and docs to reflect that the file must be unique and
will be deleted on graceful shutdown
* Relying on `java.nio.file.FileAlreadyExistsException` to determine the
case when failed due to the nonunique file name.
* toString instead of Exception.getMessage
java.nio exception's getMessage can be just a file name, need the class
name to capture the error context.
* updatePortFile -> createPortFile
* write to file instead of write into file
* Use com.daml as groupId for all artifacts
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[SDK] Changed the groupId for Maven artifacts to ``com.daml``.
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* Add 2 additional maven related checks to the release binary
1. Check that all maven upload artifacts use com.daml as the groupId
2. Check that all maven upload artifacts have a unique artifactId
* Address @cocreature's comments in https://github.com/digital-asset/daml/pull/5272#pullrequestreview-385026181
* http-json: Ask for a free port by specifying port 0.
This will avoid race conditions.
* bindings-akka-testing: Delete RandomPorts; it's unused.
* ports: Fix the Bazel test glob.
* ports: Move FreePort to postgresql-testing and add a test case.
* postgresql-testing: Make `FreePort.find()` return a `Port`.
* postgresql-testing: Lock free ports until the server starts.
This uses a `FileLock`, which should work well on all our
supported operating systems as long as everyone agrees to use it.
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* postgresql-testing: Try to find a free port 10 times, then give up.
* postgresql-testing: Use a shared directory for the port lock.
* postgresql-testing: Try an alternative way of getting `%LOCALAPPDATA%`.
* libs-scala/ports: Wrap socket ports in a type, `Port`.
* sandbox: Use `Port` for the API server port, and propagate.
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* extractor: Use `Port` for the server port.
* ports: Make Port a compile-time class only.
* ports: Allow port 0; it can be specified by a user.
* ports: Publish to Maven Central.
* Avoid opening a server to the world when finding a free port.
This is very annoying on macOS because we get a focus-stealing popup for
a split second, asking for permission to allow the server through the
firewall. The popup pretty much always disappears before it can even be
read, when the server is closed.
This is almost certainly not an attack vector, because:
- we only do this in tests,
- the server is open for only a few milliseconds,
- nothing is served,
- and finding the port is tricky, because it's effectively random.
Nevertheless, it's very annoying.
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* Extract a Bazel package for finding free ports.
We seem to do it in 4 different places, which I think is enough to
remove the duplication.
