From f7b38f0a95762c75ad17ac94cb93e3b046108e85 Mon Sep 17 00:00:00 2001
From: Varun Gandhi <varun.gandhi@sourcegraph.com>
Date: Thu, 6 Oct 2022 19:05:28 +0800
Subject: [PATCH] cli: Improve version reporting. (#103)

---
 .github/workflows/release.yml |  1 +
 cmd/main.go                   | 34 +++++++++++++++++++++++++++++++++-
 cmd/main_test.go              |  4 ++++
 cmd/version.txt               |  1 +
 4 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 cmd/version.txt

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1b91fd6b..475d10e3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,5 +23,6 @@ jobs:
           sha256sum: true
           project_path: cmd
           binary_name: scip
+          ldflags: "-X 'main.Reproducible=true'"
           asset_name: scip-${{ matrix.goos }}-${{ matrix.goarch }}
           extra_files: LICENSE
diff --git a/cmd/main.go b/cmd/main.go
index 2b4a2691..986e8fdc 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -1,8 +1,12 @@
 package main
 
 import (
+	_ "embed"
+	"fmt"
 	"log"
 	"os"
+	"runtime/debug"
+	"strings"
 
 	"github.com/urfave/cli/v2"
 )
@@ -23,10 +27,38 @@ func commands() []*cli.Command {
 	return []*cli.Command{&convert, &lint, &print, &snapshot, &stats}
 }
 
+//go:embed version.txt
+var version string
+
+var Reproducible = "" // set by ldflags in CI
+
+func gitSuffix() string {
+	if Reproducible != "" {
+		return ""
+	}
+	var rev, timestamp string
+	clean := "true"
+	if buildInfo, ok := debug.ReadBuildInfo(); ok {
+		for _, kv := range buildInfo.Settings {
+			switch kv.Key {
+			case "vcs.revision":
+				rev = kv.Value
+			case "vcs.time":
+				timestamp = kv.Value
+			case "vcs.modified":
+				if kv.Value == "true" {
+					clean = "false"
+				}
+			}
+		}
+	}
+	return fmt.Sprintf("-dev\nSHA: %s\ntimestamp: %s\nclean: %s", rev, timestamp, clean)
+}
+
 func scipApp() *cli.App {
 	app := &cli.App{
 		Name:        "scip",
-		Version:     "v0.2.1-git",
+		Version:     fmt.Sprintf("v%s%s", strings.TrimSpace(version), gitSuffix()),
 		Usage:       "SCIP Code Intelligence Protocol CLI",
 		Description: "For more details, see the project README at:\n\n\thttps://github.com/sourcegraph/scip",
 		Commands:    commands(),
diff --git a/cmd/main_test.go b/cmd/main_test.go
index c84488dc..62259e4d 100644
--- a/cmd/main_test.go
+++ b/cmd/main_test.go
@@ -19,6 +19,10 @@ import (
 	"github.com/sourcegraph/scip/cmd/tests/reprolang/bindings/go/repro"
 )
 
+func TestMain(m *testing.M) {
+	Reproducible = "true"
+}
+
 func TestCLIReferenceInSync(t *testing.T) {
 	app := scipApp()
 	readmeBytes, err := os.ReadFile(filepath.Join("..", "docs", "CLI.md"))
diff --git a/cmd/version.txt b/cmd/version.txt
new file mode 100644
index 00000000..7dff5b89
--- /dev/null
+++ b/cmd/version.txt
@@ -0,0 +1 @@
+0.2.1
\ No newline at end of file