wrote posix compliant build script, and modified makefile relevantly

do.sh

@@ -0,0 +1,112 @@
+#!/bin/sh
+
+# this script is part of dxhd project, used for building and releasing dxhd
+
+set -e
+
+BINARY_NAME=dxhd
+
+GIT_VERSION="$(git rev-parse --short HEAD)"
+DIRTY_VERSION="$(git describe --tags --dirty --always)"
+RELEASE_VERSION="$(date '+%d.%m.%Y_%H.%M')"
+
+RELEASE_DIR="$(readlink -f "$(dirname "$0")")/releases"
+
+GOOS=linux
+
+build() {
+	case "$1" in
+		fast)
+			go build -ldflags "-s -w -X main.version=$GIT_VERSION" -o "$BINARY_NAME" .
+			echo "built fast build of dxhd"
+			;;
+		dev)
+			go build -ldflags "-s -w -X main.version=$DIRTY_VERSION" -o "$BINARY_NAME" .
+			echo "built dirty, developer build of dxhd"
+			;;
+		*)
+			return 1
+			;;
+	esac
+}
+
+release_preconfig() {
+	mkdir -p "$RELEASE_DIR/386"
+	mkdir -p "$RELEASE_DIR/amd64"
+	mkdir -p "$RELEASE_DIR/arm"
+	mkdir -p "$RELEASE_DIR/arm64"
+	return 0
+}
+
+release_build() {
+	CGO_ENABLED=0
+
+	echo "building for 386"
+	GOARCH=386 go build -a -ldflags "-s -w -X main.version=$RELEASE_VERSION" -o "$RELEASE_DIR/386/$BINARY_NAME"_386 .
+
+	echo "building for amd64"
+	GOARCH=amd64 go build -a -ldflags "-s -w -X main.version=$RELEASE_VERSION" -o "$RELEASE_DIR/amd64/$BINARY_NAME"_amd64 .
+
+	echo "building for arm"
+	GOARCH=arm go build -a -ldflags "-s -w -X main.version=$RELEASE_VERSION" -o "$RELEASE_DIR/arm/$BINARY_NAME"_arm .
+
+	echo "building for arm64"
+	GOARCH=arm64 go build -a -ldflags "-s -w -X main.version=$RELEASE_VERSION" -o "$RELEASE_DIR/arm64/$BINARY_NAME"_arm64 .
+
+	echo
+
+	return 0
+}
+
+release_push() {
+	[ ! "$(git cherry)" = "" ] && echo "you have commits that are yet not pushed"
+	git status | grep -qi '^untracked files:' && echo "you have untracked files"
+	git status | grep -qi '^changes to be committed:' && echo "you have changes to be commited"
+
+	echo 'are you sure you want to git tag and push? type "yes I want" in screaming snake case :)'
+	read -r ANS
+	echo
+
+	case "$ANS" in
+		YES_I_WANT)
+			;;
+		*)
+			return 1
+			;;
+	esac
+
+	LAST_TAG="$(git describe --tags --abbrev=0)"
+
+	git tag -a "$RELEASE_VERSION" -m "$RELEASE_VERSION release"
+	git push -u origin "$RELEASE_VERSION"
+
+	return 0
+}
+
+release_commits() {
+	COMMITS="$(git log --oneline "$LAST_TAG"..HEAD)"
+	echo "commits since last tag ($LAST_TAG) for release page"
+	echo ""
+	echo "$COMMITS"
+	echo ""
+	echo "$COMMITS" > "$RELEASE_DIR/release_info"
+}
+
+if [ -z "$1" ]; then
+	build dev
+else
+	case "$1" in
+		fast)
+			build fast
+			;;
+		dev)
+			build dev
+			;;
+		release)
+			release_preconfig
+			release_build
+			release_push
+			release_commits
+			;;
+	esac
+fi

makefile

@@ -1,14 +1,5 @@
-MASTERVERSION := $(shell git rev-parse --short HEAD)
-VERSION := $(shell git describe --tags --dirty --always)
-DATE := $(shell date "+%d.%m.%Y_%H.%M")
-
+.POSIX:
 fast:
-	go build -ldflags "-s -w -X main.version=$(MASTERVERSION)" -o dxhd .
-
+	./do.sh fast
 dev:
-	go build -ldflags "-X main.version=$(VERSION)" -o dxhd .
-
-release:
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -ldflags "-s -w -X main.version=$(DATE)" -o dxhd .
-	git tag -a $(DATE) -m "release $(DATE)"
-	git push origin $(DATE)
+	./do.sh dev