This patch implements a new mode of network tethering for Playwright
server & its clients.
With this patch:
- playwright server could be launched with the
`--browser-proxy-mode=tether` flag to engage in the new mode
- a new type of client, "Network Tethering Client" can connect to the
server to provide network traffic to the browsers
- all clients that connect to the server with the `x-playwright-proxy:
*` header will get traffic from the "Network Tethering Client"
This patch also adds an environment variable
`PW_OWNED_BY_TETHER_CLIENT`. With this env, playwright server will
auto-close when the network tethering client disconnects. It will also
auto-close if the network client does not connect to the server in the
first 10 seconds of the server existence. This way we can ensure that
`npx playwright docker start` blocks terminal & controls the lifetime of
the started container.
This patch moves parts of docker configuration to a plugin so that
it can rely on repoter for stdout.
Drive-by: provide all plugins with reporter in the `setup` callback.
Fixes#8206.
Since #8206 is a long-awaited (~ 1 year old), popular (~ 45 reactions, frequently requested in community channels, etc.), this PR aims to unblock folks.
Notably, we do not innovate on the `webServer` API, despite knowing we're not in love with it. We'll save the innovation for either Plugins or a new `LaunchConfigs` option. (We haven't yet arrived at a Plugin API we like, and instead of launching a new option guessing what the "better" launchConfig API would be, let's wait and see how folks use this new Array-variant of `webServer` which—despite its name—can be used for non-Web Server launches!
