From 833477e3d2981c4cc896fb5709b478386c51b62a Mon Sep 17 00:00:00 2001
From: Marc Khouzam <kmarc@vmware.com>
Date: Fri, 2 Sep 2022 17:28:18 -0400
Subject: [PATCH] Provide automatic buildinfo for plugins (#3261)

Fixes #3230

Signed-off-by: Marc Khouzam <kmarc@vmware.com>
---
 cli/runtime/buildinfo/buildinfo.go            | 22 +++++++++++++++++++
 .../template/plugintemplates/Makefile.tmpl    |  4 ++++
 .../template/plugintemplates/main.go.tmpl     |  5 +++--
 3 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 cli/runtime/buildinfo/buildinfo.go

diff --git a/cli/runtime/buildinfo/buildinfo.go b/cli/runtime/buildinfo/buildinfo.go
new file mode 100644
index 0000000000..ddd4a215cb
--- /dev/null
+++ b/cli/runtime/buildinfo/buildinfo.go
@@ -0,0 +1,22 @@
+// Copyright 2021 VMware, Inc. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package buildinfo holds global variables set at build time to provide information about the plugin build.
+package buildinfo
+
+var (
+	// Date is the date the plugin binary was built.
+	// It should be set using:
+	//  go build --ldflags "-X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.Date=...'"
+	Date string
+
+	// SHA is the git commit SHA the plugin binary was built with.
+	// Is should be set using:
+	//  go build --ldflags "-X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.SHA=...'"
+	SHA string
+
+	// Version is the version of the plugin built.
+	// It should be set using:
+	//  go build --ldflags "-X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.Version=...'"
+	Version string
+)
diff --git a/pkg/v1/builder/template/plugintemplates/Makefile.tmpl b/pkg/v1/builder/template/plugintemplates/Makefile.tmpl
index 34ab0b077d..bc0a225a0a 100644
--- a/pkg/v1/builder/template/plugintemplates/Makefile.tmpl
+++ b/pkg/v1/builder/template/plugintemplates/Makefile.tmpl
@@ -11,6 +11,10 @@ GOARCH ?= $(shell go env GOARCH)
 GOHOSTOS ?= $(shell go env GOHOSTOS)
 GOHOSTARCH ?= $(shell go env GOHOSTARCH)
 
+LD_FLAGS = -X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.Date=$(BUILD_DATE)'
+LD_FLAGS += -X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.SHA=$(BUILD_SHA)'
+LD_FLAGS += -X 'github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo.Version=$(BUILD_VERSION)'
+
 TOOLS_DIR := tools
 TOOLS_BIN_DIR := $(TOOLS_DIR)/bin
 GOLANGCI_LINT := $(TOOLS_BIN_DIR)/golangci-lint
diff --git a/pkg/v1/builder/template/plugintemplates/main.go.tmpl b/pkg/v1/builder/template/plugintemplates/main.go.tmpl
index e84f028dcc..36d983977a 100644
--- a/pkg/v1/builder/template/plugintemplates/main.go.tmpl
+++ b/pkg/v1/builder/template/plugintemplates/main.go.tmpl
@@ -6,14 +6,15 @@ import (
 	"github.com/aunum/log"
 
 	cliv1alpha1 "github.com/vmware-tanzu/tanzu-framework/apis/cli/v1alpha1"
+	"github.com/vmware-tanzu/tanzu-framework/cli/runtime/buildinfo"
 	"github.com/vmware-tanzu/tanzu-framework/cli/runtime/plugin"
 )
 
 var descriptor = cliv1alpha1.PluginDescriptor{
 	Name:        "{{ .PluginName | ToLower }}",
 	Description: "{{ .Description | ToLower }}",
-	Version:     "v0.0.1",
-	BuildSHA:    "",
+	Version:     buildinfo.Version,
+	BuildSHA:    buildinfo.SHA,
 	Group:       cliv1alpha1.ManageCmdGroup, // set group
 }