This PR builds up on the pass-through DB driver to a fully functioning DB driver implementation via our RPC layer.
To keep things separate from the plugin RPC API, and have the ability to move fast with changes, a separate field Driver is added to MattermostPlugin. Typically the field which is required to be compatible are the API and Helpers. It would be well-documented that Driver is purely for internal use by Mattermost plugins.
A new Driver interface was created which would have a client and server implementation. Every object (connection, statement, etc.) is created and added to a map on the server side. On the client side, the wrapper structs hold the object id, and communicate via the RPC API using this id.
When the server gets the object id, it picks up the appropriate object from its map and performs the operation, and sends back the data.
Some things that need to be handled are errors. Typical error types like pq.Error and mysql.MySQLError are registered with encoding/gob. But for error variables like sql.ErrNoRows, a special integer is encoded with the ErrorString struct. And on the cilent side, the integer is checked, and the appropriate error variable is returned.
Some pending things:
- Context support. This is tricky. Since context.Context is an interface, it's not possible to marshal it. We have to find a way to get the timeout value from the context and pass it.
- RowsColumnScanType(rowsID string, index int) reflect.Type API. Again, reflect.Type is an interface.
- Master/Replica API support.
With Go 1.14 (https://tip.golang.org/doc/go1.14#go-command),
it now automatically checks for the existence of a vendor directory.
So there is no need to explicitly set the `-mod=vendor` flag.
* Consistent license message for all the go files
* Fixing the last set of unconsistencies with the license headers
* Addressing PR review comments
* Fixing busy.go and busy_test.go license header
* MM-16506: conditionally build go.mod for plugins
Unless `GO111MODULE=off`, generate a `go.mod` that points at the local copy of `mattermost-server` to ensure plugin tests that compile source code on demand always test with the local copy of mattermost-server. This also fixes an issue with early adopters of `GO111MODULE=on` on the server failing to find the right version of go-i18n dependencies.
* plugin: enable testlib resource management
* customize fileutils.Find* for testlib
* MM-14575 - Automatically serve static files for plugins
* Added static handler for plugin public files
* Added StaticFilesPath method to Environment for use by MainRouter
* Added "static_files" property to Manifest Server
* Added unit tests for these changes
* MM-14575: Adding comment for cache control value
* MM-14575: Moved Static Plugin Request handler to plugin_requests
* Updated testing
* MM-14575: Removing the StaticFiles from Manifest Server
* MM-14575: Removing static files from test
* MM-14575: Updating static files test
* MM14575: Removing cache directive from plugin static files
* MM14575: Moving plugin public directory to root
* MM-14575: Updating tests for changed public directory
* MM-14575: Moved compileGo to a common utils package for tests
* MM-14575: Moving plugins initialization to InitPlugins find in tests
* Update utils/test_files_compiler.go
Adding Copyright header
Co-Authored-By: happygaijin <happygaijin@users.noreply.github.com>
* MM-14575: Consistent usage of static vs public name
* Removing spurious newline
* Comment typo
Co-Authored-By: happygaijin <happygaijin@users.noreply.github.com>
* Removing spurious new line
Co-Authored-By: happygaijin <happygaijin@users.noreply.github.com>
* MM14575: Adding a test to make sure only public files can be requested
* MM-14575 Adding a test for redirects on public files
