repo_description: Container Network Interface - networking for Linux containers
repo_topics: containers docker kubernetes networking
code: // Copyright 2016 CNI authors
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package invoke_test
  
  import (
  	"context"
  	"os"
  	"path/filepath"
  	"runtime"
  
  	. "github.com/onsi/ginkgo/v2"
  	. "github.com/onsi/gomega"
  
  	"github.com/containernetworking/cni/pkg/invoke"
  	"github.com/containernetworking/cni/pkg/version"
  	"github.com/containernetworking/cni/pkg/version/testhelpers"
  )
  
  var _ = Describe("GetVersion, integration tests", func() {
  	var (
  		pluginDir  string
  		pluginPath string
  	)
  
  	BeforeEach(func() {
  		pluginDir, err := os.MkdirTemp("", "plugins")
  		Expect(err).NotTo(HaveOccurred())
  		pluginPath = filepath.Join(pluginDir, "test-plugin")
  		if runtime.GOOS == "windows" {
  			pluginPath += ".exe"
  		}
  	})
  
  	AfterEach(func() {
  		Expect(os.RemoveAll(pluginDir)).To(Succeed())
  	})
  
  	DescribeTable("correctly reporting plugin versions",
  		func(gitRef string, pluginSource string, expectedVersions version.PluginInfo) {
  			Expect(testhelpers.BuildAt([]byte(pluginSource), gitRef, pluginPath)).To(Succeed())
  			versionInfo, err := invoke.GetVersionInfo(context.TODO(), pluginPath, nil)
  			Expect(err).NotTo(HaveOccurred())
  
  			Expect(versionInfo.SupportedVersions()).To(ConsistOf(expectedVersions.SupportedVersions()))
  		},
  
  		Entry("historical: before VERSION was introduced",
  			git_ref_v010, plugin_source_no_custom_versions,
  			version.PluginSupports("0.1.0"),
  		),
  
  		Entry("historical: when VERSION was introduced but plugins couldn't customize it",
  			git_ref_v020_no_custom_versions, plugin_source_no_custom_versions,
  			version.PluginSupports("0.1.0", "0.2.0"),
  		),
  
  		Entry("historical: when plugins started reporting their own version list",
  			git_ref_v020_custom_versions, plugin_source_v020_custom_versions,
  			version.PluginSupports("0.2.0", "0.999.0"),
  		),
  
  		Entry("historical: before CHECK was introduced",
  			git_ref_v031, plugin_source_v020_custom_versions,
  			version.PluginSupports("0.2.0", "0.999.0"),
  		),
  
  		// this entry tracks the current behavior.  Before you change it, ensure
  		// that its previous behavior is captured in the most recent "historical" entry
  		Entry("current",
  			"HEAD", plugin_source_v040_check,
  			version.PluginSupports("0.2.0", "0.4.0", "0.999.0"),
  		),
  	)
  })
  
  // A 0.4.0 plugin that supports CHECK
  const plugin_source_v040_check = `package main
  
  import (
  	"github.com/containernetworking/cni/pkg/skel"
  	"github.com/containernetworking/cni/pkg/version"
  	"fmt"
  )
  
  func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }
  
  func main() { skel.PluginMain(c, c, c, version.PluginSupports("0.2.0", "0.4.0", "0.999.0"), "") }
  `
  
  const git_ref_v031 = "909fe7d"
  
  // a 0.2.0 plugin that can report its own versions
  const plugin_source_v020_custom_versions = `package main
  
  import (
  	"github.com/containernetworking/cni/pkg/skel"
  	"github.com/containernetworking/cni/pkg/version"
  	"fmt"
  )
  
  func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }
  
  func main() { skel.PluginMain(c, c, version.PluginSupports("0.2.0", "0.999.0")) }
  `
  const git_ref_v020_custom_versions = "bf31ed15"
  
  // a minimal 0.1.0 / 0.2.0 plugin that cannot report it's own version support
  const plugin_source_no_custom_versions = `package main
  
  import "github.com/containernetworking/cni/pkg/skel"
  import "fmt"
  
  func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }
  
  func main() { skel.PluginMain(c, c) }
  `
  
  const (
  	git_ref_v010                    = "2c482f4"
  	git_ref_v020_no_custom_versions = "349d66d"
  )
  