Add build time variables

internal/game.go

@@ -11,6 +11,7 @@ import (
 	"git.wisellama.rocks/Project-Ely/project-ely/internal/entity"
 	"git.wisellama.rocks/Project-Ely/project-ely/internal/player"
 	"git.wisellama.rocks/Project-Ely/project-ely/internal/sprite"
+	"git.wisellama.rocks/Project-Ely/project-ely/internal/version"
 	"git.wisellama.rocks/Wisellama/gosimpleconf"
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
@@ -35,9 +36,15 @@ func Run(ctx context.Context, configMap gosimpleconf.ConfigMap) error {
 	framerate64 := gosimpleconf.Int64(configMap["game.framerate"])
 	framerate := int32(framerate64)
 
+	windowTitle := fmt.Sprintf("%s - %s (%s)",
+		configMap["game.title"],
+		version.Version,
+		version.CommitHash,
+	)
+
 	// Initialize the RayLib window
 	channels.RL.Do(func() {
-		rl.InitWindow(800, 600, configMap["game.title"])
+		rl.InitWindow(800, 600, windowTitle)
 		rl.SetTargetFPS(framerate)
 	})
 	defer func() {

internal/version/version.go

@@ -0,0 +1,18 @@
+package version
+
+import "fmt"
+
+// Thanks to the following blog post for how to use the linker flags
+// to pass in build-time variables.
+//
+// https://belief-driven-design.com/build-time-variables-in-go-51439b26ef9/
+
+var (
+	Version        = "dev"
+	CommitHash     = "n/a"
+	BuildTimestamp = "n/a"
+)
+
+func BuildVersion() string {
+	return fmt.Sprintf("%s %s %s", Version, CommitHash, BuildTimestamp)
+}

scripts/build-unix.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env sh
+
+d=$(cd $(dirname $0) && pwd -P)
+
+. "${d}/common-release-build.sh"
+
+build $(uname) $(uname -m)

scripts/build-windows-386.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 
-. common-build-windows.sh
+d=$(cd $(dirname $0) && pwd -P)
+
+. "${d}/common-release-build.sh"
 
 build windows 386

scripts/build-windows-am64.sh

@@ -1,5 +0,0 @@
-#!/usr/bin/env sh
-
-. common-release-build.sh
-
-build windows amd64

scripts/build-windows-amd64.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env sh
+
+d=$(cd $(dirname $0) && pwd -P)
+
+. "${d}/common-release-build.sh"
+
+build windows amd64

scripts/common-release-build.sh

@@ -5,25 +5,38 @@ build(){
 	OS=$1
 	ARCH=$2
 
-	if [ -z $NAME ]
-	then
-		NAME=output
-	fi
+	# Lowercase
+	OS=$(echo "$OS" | awk '{ print tolower($0) }')
+	ARCH=$(echo "$ARCH" | awk '{ print tolower($0) }')
 
 	if [ -z "${CC}" ]
 	then
 		export CC=gcc
 	fi
 
-	LDFLAGS_WIN=""
+	# Add .exe to Windows output
 	EXE=""
-	if [ "${OS}" == "windows" ]
+	if [ "${OS}" = "windows" ]
 	then
-		LDFLAGS_WIN="-H windowsgui"
 		EXE=".exe"
 	fi
 
-	OUTPUT="${NAME}-${OS}-${ARCH}${EXE}"
+	if [ "${ARCH}" = "x86_64" ]
+	then
+	   ARCH="amd64"
+	fi
+
+	PACKAGE="$(grep module go.mod | awk '{print $2}')"
+	TAG="$(git describe --tags --abbrev=0)"
+	VERSION="$(echo ${TAG} | awk -F '-' '{print $NF}')"
+	COMMIT_HASH="$(git rev-parse --short HEAD)"
+	BUILD_TIMESTAMP="$(date -u '+%Y-%m-%dT%H:%M:%SZ')"
+
+	OUTPUT="${TAG}-${OS}-${ARCH}${EXE}"
+
+	LDFLAGS="${LDFLAGS} -X '${PACKAGE}/internal/version.Version=${VERSION}'"
+	LDFLAGS="${LDFLAGS} -X '${PACKAGE}/internal/version.CommitHash=${COMMIT_HASH}'"
+	LDFLAGS="${LDFLAGS} -X '${PACKAGE}/internal/version.BuildTimestamp=${BUILD_TIMESTAMP}'"
 
 	export CGO_ENABLED=1
 	export CC="${CC}"
@@ -31,7 +44,6 @@ build(){
 	export GOARCH=$ARCH
 	go build -x -v \
 	   -trimpath \
-	   -tags static \
-	   -ldflags="-s -w ${LDFLAGS_WIN}" \
+	   -ldflags="-s -w ${LDFLAGS}" \
 	   -o "${OUTPUT}"
 }