feat: add gno version command

gnovm/Makefile

@@ -32,15 +32,19 @@ GOBUILD_FLAGS ?= -ldflags "-X github.com/gnolang/gno/gnovm/pkg/gnoenv._GNOROOT=$
 # more complex than adding -coverprofile, like test.cmd.coverage.
 GOTEST_COVER_PROFILE ?= cmd-profile.out
 
+# user for gno version [branch].[N]+[hash]
+VERSION ?= $(shell git describe --tags --exact-match 2>/dev/null || echo "$(shell git rev-parse --abbrev-ref HEAD).$(shell git rev-list --count HEAD)+$(shell git rev-parse --short HEAD)")
+VCS_REF ?= $(shell git rev-parse --short HEAD)
+
 ########################################
 # Dev tools
 .PHONY: build
 build:
-	go build $(GOBUILD_FLAGS) -o build/gno ./cmd/gno
+	go build -ldflags="-X main.buildVersion=$(VERSION) -X main.commitHash=$(VCS_REF) -X github.com/gnolang/gno/gnovm/pkg/gnoenv._GNOROOT=$(GNOROOT_DIR)" -o build/gno ./cmd/gno
 
 .PHONY: install
 install:
-	go install $(GOBUILD_FLAGS) ./cmd/gno
+	go install -ldflags="-X main.buildVersion=$(VERSION) -X main.commitHash=$(VCS_REF) -X github.com/gnolang/gno/gnovm/pkg/gnoenv._GNOROOT=$(GNOROOT_DIR)" ./cmd/gno
 
 .PHONY: clean
 clean:

gnovm/cmd/gno/main.go

@@ -35,6 +35,7 @@ func newGnocliCmd(io commands.IO) *commands.Command {
 		newEnvCmd(io),
 		newBugCmd(io),
 		newFmtCmd(io),
+		newVersionCmd(io),
 		// graph
 		// vendor -- download deps from the chain in vendor/
 		// list -- list packages

gnovm/cmd/gno/testdata/gno_version/branch_commit_version.txtar

@@ -0,0 +1,2 @@
+-- stdout.golden --
+gno version: master.387+e872fa

gnovm/cmd/gno/testdata/gno_version/tagged_version.txtar

@@ -0,0 +1,2 @@
+-- stdout.golden --
+gno version: chain/test4.2

gnovm/cmd/gno/version.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"context"
+
+	"github.com/gnolang/gno/tm2/pkg/commands"
+)
+
+var buildVersion string
+
+// newVersionCmd creates a new version command
+func newVersionCmd(io commands.IO) *commands.Command {
+	return commands.NewCommand(
+		commands.Metadata{
+			Name:       "version",
+			ShortUsage: "version",
+			ShortHelp:  "Display installed gno version",
+		},
+		nil,
+		func(_ context.Context, args []string) error {
+			version := getGnoVersion()
+			io.Println("gno version:", version)
+			return nil
+		},
+	)
+}
+
+func getGnoVersion() string {
+	if buildVersion != "" {
+		return buildVersion
+	}
+	return "unknown version"
+}

gnovm/cmd/gno/version_test.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+var testBuildVersion string
+
+func init() {
+	if isTestTaggedVersion() {
+		testBuildVersion = "chain/test4.2"
+	} else {
+		testBuildVersion = "master.387+e872fa"
+	}
+	buildVersion = testBuildVersion
+}
+
+func isTestTaggedVersion() bool {
+	testDir := os.Getenv("TEST_CASE_DIR")
+	return strings.Contains(testDir, "tagged_version")
+}
+
+func TestVersionApp(t *testing.T) {
+	testCases := []testMainCase{
+		{
+			args:                []string{"version"},
+			testDir:             "testdata/gno_version/branch_commit_version.txtar",
+			stdoutShouldContain: "gno version: master.387+e872fa",
+		},
+		{
+			args:                []string{"version"},
+			testDir:             "testdata/gno_version/tagged_version.txtar",
+			stdoutShouldContain: "gno version: chain/test4.2",
+		},
+	}
+
+	for _, testCase := range testCases {
+		os.Setenv("TEST_CASE_DIR", testCase.testDir)
+		if isTestTaggedVersion() {
+			buildVersion = "chain/test4.2"
+		} else {
+			buildVersion = "master.387+e872fa"
+		}
+		testMainCaseRun(t, []testMainCase{testCase})
+	}
+}