Check that CLI is at least specified min version

cmd/root.go

@@ -13,6 +13,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/ava-labs/avalanche-cli/pkg/version"
+
 	"github.com/ava-labs/avalanche-cli/cmd/blockchaincmd"
 	"github.com/ava-labs/avalanche-cli/cmd/configcmd"
 	"github.com/ava-labs/avalanche-cli/cmd/contractcmd"
@@ -144,7 +146,9 @@ func createApp(cmd *cobra.Command, _ []string) error {
 	if err := checkForUpdates(cmd, app); err != nil {
 		return err
 	}
-
+	if err := version.CheckCLIVersionIsOverMin(app, Version); err != nil {
+		return err
+	}
 	return nil
 }
 

pkg/constants/constants.go

@@ -297,6 +297,7 @@ const (
 	AvalancheGoCompatibilityURL  = "https://raw.githubusercontent.com/ava-labs/avalanchego/master/version/compatibility.json"
 	SubnetEVMRPCCompatibilityURL = "https://raw.githubusercontent.com/ava-labs/subnet-evm/master/compatibility.json"
 	CLILatestDependencyURL       = "https://raw.githubusercontent.com/ava-labs/avalanche-cli/main/versions/latest.json"
+	CLIMinVersionURL             = "https://raw.githubusercontent.com/ava-labs/avalanche-cli/cli-min-version/versions/min_cli_version.json"
 
 	YesLabel = "Yes"
 	NoLabel  = "No"

pkg/version/min_cli_version.go

@@ -0,0 +1,45 @@
+// Copyright (C) 2022, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+package version
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"golang.org/x/mod/semver"
+
+	"github.com/ava-labs/avalanche-cli/pkg/application"
+	"github.com/ava-labs/avalanche-cli/pkg/constants"
+)
+
+type CLIMinVersionMap struct {
+	MinVersion string `json:"min-version"`
+}
+
+func CheckCLIVersionIsOverMin(app *application.Avalanche, version string) error {
+	minVersionBytes, err := app.Downloader.Download(constants.CLIMinVersionURL)
+	if err != nil {
+		return err
+	}
+
+	var parsedMinVersion CLIMinVersionMap
+	if err = json.Unmarshal(minVersionBytes, &parsedMinVersion); err != nil {
+		return err
+	}
+
+	minVersion := parsedMinVersion.MinVersion
+	// Add 'v' prefix if missing
+	if !strings.HasPrefix(minVersion, "v") {
+		minVersion = "v" + minVersion
+	}
+	if !strings.HasPrefix(version, "v") {
+		version = "v" + version
+	}
+
+	versionComparison := semver.Compare(version, minVersion)
+	if versionComparison == -1 {
+		return fmt.Errorf("CLI version is required to be at least %s, current CLI version is %s, please upgrade CLI by calling `curl -sSfL https://raw.githubusercontent.com/ava-labs/avalanche-cli/main/scripts/install.sh | sh -s`", minVersion, version)
+	}
+	return nil
+}

pkg/version/min_cli_version_test.go

@@ -0,0 +1,73 @@
+// Copyright (C) 2022, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package version
+
+import (
+	"testing"
+
+	"github.com/ava-labs/avalanche-cli/internal/mocks"
+	"github.com/ava-labs/avalanche-cli/pkg/application"
+	"github.com/ava-labs/avalanche-cli/pkg/constants"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCheckMinDependencyVersion(t *testing.T) {
+	tests := []struct {
+		name              string
+		cliVersion        string
+		expectedError     bool
+		cliDependencyData []byte
+	}{
+		{
+			name:              "cli version equal to minimum version",
+			cliVersion:        "1.8.10",
+			cliDependencyData: []byte(`{"min-version":"1.8.10"}`),
+			expectedError:     false,
+		},
+		{
+			name:              "cli version higher than minimum version",
+			cliVersion:        "1.8.11",
+			cliDependencyData: []byte(`{"min-version":"1.8.10"}`),
+			expectedError:     false,
+		},
+		{
+			name:              "cli version lower than minimum version",
+			cliVersion:        "1.8.9",
+			cliDependencyData: []byte(`{"min-version":"1.8.10"}`),
+			expectedError:     true,
+		},
+		{
+			name:              "cli version much higher than minimum version",
+			cliVersion:        "1.13.0",
+			cliDependencyData: []byte(`{"min-version":"1.8.10"}`),
+			expectedError:     false,
+		},
+		{
+			name:              "cli version much lower than minimum version",
+			cliVersion:        "1.7.0",
+			cliDependencyData: []byte(`{"min-version":"1.8.10"}`),
+			expectedError:     true,
+		},
+	}
+
+	for _, tt := range tests {
+		mockDownloader := &mocks.Downloader{}
+		mockDownloader.On("Download", mock.MatchedBy(func(url string) bool {
+			return url == constants.CLIMinVersionURL
+		})).Return(tt.cliDependencyData, nil)
+
+		app := application.New()
+		app.Downloader = mockDownloader
+
+		t.Run(tt.name, func(t *testing.T) {
+			err := CheckCLIVersionIsOverMin(app, tt.cliVersion)
+			if tt.expectedError {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

versions/min_cli_version.json

@@ -0,0 +1,3 @@
+{
+  "min-version": "1.8.10"
+}