The CLI currently hard-codes the schema-version for CLI plugins to
"0.1.0", which doesn't allow us to expand the schema for plugins.
As there's many plugins that we shipped already, we can't break
compatibility until we reach 2.0.0, but we can expand the schema
with non-breaking changes.
This patch makes the validation more permissive to allow new schema
versions <= 2.0.0. Note that existing CLIs will still invalidate
such versions, so we cannot update the version until such CLIs are
no longer expected to be used, but this patch lays the ground-work
to open that option.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The pluginNameRe was a basic regular expression, effectively only checking
if the name consisted of lowercase alphanumeric characters. Replace it
with a minimal utility to do the same, without having to use regular
expressions (or the "lazyregexp" package).
Some quick benchmarking (not committed) show that the non-regex approach
is ~25x faster:
BenchmarkIsValidPluginName_Regex_Valid-10 13956240 81.39 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Valid-10 360003060 3.318 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Regex_Invalid-10 35281794 33.74 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Invalid-10 906072663 1.320 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Regex_Parallel-10 96595677 12.04 ns/op 0 B/op 0 allocs/op
BenchmarkIsValidPluginName_Manual_Parallel-10 1000000000 0.4541 ns/op 0 B/op 0 allocs/op
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
It is for internal use, and no longer needed for testing, now that
the `Plugin` type handles marshalling errors.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Go does not by default marshal `error` type fields to JSON. The manager
package therefore implemented a `pluginError` type that implements
[encoding.TextMarshaler]. However, the field was marked as a regular
`error`, which made it brittle; assining any other type of error would
result in the error being discarded in the marshaled JSON (as used in
`docker info` output), resulting in the error being marshaled as `{}`.
This patch adds a custom `MarshalJSON()` on the `Plugin` type itself
so that any error is rendered. It checks if the error used already
implements [encoding.TextMarshaler], otherwise wraps the error in
a `pluginError`.
[encoding.TextMarshaler]: https://pkg.go.dev/encoding#TextMarshaler
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
During normal plugin execution (from the CLI), the CLI configures the
plugin command it's about to execute in order to pass all environment
variables on, as well as to set the ReExec env var that informs the
plugin about how it was executed, and which plugins rely on to check
whether they are being run standalone or not.
This commit adds the same behavior to hook invocations, which is
necessary for some plugins to know that they are not running standalone
so that they expose their root command at the correct level.
Signed-off-by: Laura Brehm <laurabrehm@hey.com>
Older versions of Go do not format these comments, so we can already
reformat them ahead of time to prevent gofmt linting failing once
we update to Go 1.19 or up.
Result of:
gofmt -s -w $(find . -type f -name '*.go' | grep -v "/vendor/")
With some manual adjusting.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The CLI disabled experimental features by default, requiring users
to set a configuration option to enable them.
Disabling experimental features was a request from Enterprise users
that did not want experimental features to be accessible.
We are changing this policy, and now enable experimental features
by default. Experimental features may still change and/or removed,
and will be highlighted in the documentation and "usage" output.
For example, the `docker manifest inspect --help` output now shows:
EXPERIMENTAL:
docker manifest inspect is an experimental feature.
Experimental features provide early access to product functionality. These features
may change between releases without warning or can be removed entirely from a future
release. Learn more about experimental features: https://docs.docker.com/go/experimental/
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
To test, add $(pwd)/build/plugins-linux-amd64 to "cliPluginsExtraDirs" config and run:
make plugins
make binary
HELLO_EXPERIMENTAL=1 docker helloworld
To show it enabled:
HELLO_EXPERIMENTAL=1 DOCKER_CLI_EXPERIMENTAL=enabled docker helloworld
Signed-off-by: Tibor Vass <tibor@docker.com>
Fairly straight forward. It became necessary to wrap `Plugin.Err` with a type
which implements `encoding.MarshalText` in order to have that field rendered
properly in the `docker info -f '{{json}}'` output.
Since I changed the type somewhat I also added a unit test for `formatInfo`.
Signed-off-by: Ian Campbell <ijc@docker.com>
To do this we add a stub `cobra.Command` for each installed plugin (only when
invoking `help`, not for normal running).
This requires a function to list all available plugins so that is added here.
Signed-off-by: Ian Campbell <ijc@docker.com>
Also includes the scaffolding for finding a validating plugin candidates.
Argument validation is moved to RunE to support this, so `noArgs` is removed.
Signed-off-by: Ian Campbell <ijc@docker.com>
