Add dnsonly build and build script

.gitignore

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+dnsonly
+

build

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+#!/bin/bash
+
+# get build data
+if [[ "$BUILD_COMMIT" == "" ]]; then
+  BUILD_COMMIT=$(git describe --all --long --abbrev=99 --dirty 2>/dev/null)
+fi
+if [[ "$BUILD_USER" == "" ]]; then
+  BUILD_USER=$(id -un)
+fi
+if [[ "$BUILD_HOST" == "" ]]; then
+  BUILD_HOST=$(hostname -f)
+fi
+if [[ "$BUILD_DATE" == "" ]]; then
+  BUILD_DATE=$(date +%d.%m.%Y)
+fi
+if [[ "$BUILD_SOURCE" == "" ]]; then
+  BUILD_SOURCE=$(git remote -v | grep origin | cut -f2 | cut -d" " -f1 | head -n 1)
+fi
+if [[ "$BUILD_SOURCE" == "" ]]; then
+  BUILD_SOURCE=$(git remote -v | cut -f2 | cut -d" " -f1 | head -n 1)
+fi
+BUILD_BUILDOPTIONS=$(echo $* | sed "s/ /§/g")
+
+# check
+if [[ "$BUILD_COMMIT" == "" ]]; then
+  echo "could not automatically determine BUILD_COMMIT, please supply manually as environment variable."
+  exit 1
+fi
+if [[ "$BUILD_USER" == "" ]]; then
+  echo "could not automatically determine BUILD_USER, please supply manually as environment variable."
+  exit 1
+fi
+if [[ "$BUILD_HOST" == "" ]]; then
+  echo "could not automatically determine BUILD_HOST, please supply manually as environment variable."
+  exit 1
+fi
+if [[ "$BUILD_DATE" == "" ]]; then
+  echo "could not automatically determine BUILD_DATE, please supply manually as environment variable."
+  exit 1
+fi
+if [[ "$BUILD_SOURCE" == "" ]]; then
+  echo "could not automatically determine BUILD_SOURCE, please supply manually as environment variable."
+  exit 1
+fi
+
+echo "Please notice, that this build script includes metadata into the build."
+echo "This information is useful for debugging and license compliance."
+echo "Run the compiled binary with the -version flag to see the information included."
+
+# build
+BUILD_PATH="github.com/Safing/portbase/info"
+go build -ldflags "-X ${BUILD_PATH}.commit=${BUILD_COMMIT} -X ${BUILD_PATH}.buildOptions=${BUILD_BUILDOPTIONS} -X ${BUILD_PATH}.buildUser=${BUILD_USER} -X ${BUILD_PATH}.buildHost=${BUILD_HOST} -X ${BUILD_PATH}.buildDate=${BUILD_DATE} -X ${BUILD_PATH}.buildSource=${BUILD_SOURCE}" $*

dnsonly.go

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+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/Safing/portbase/info"
+	"github.com/Safing/portbase/log"
+	"github.com/Safing/portbase/modules"
+	// include packages here
+
+	_ "github.com/Safing/portbase/database/dbmodule"
+	_ "github.com/Safing/portbase/database/storage/badger"
+	_ "github.com/Safing/portmaster/intel"
+	_ "github.com/Safing/portmaster/nameserver/only"
+)
+
+func main() {
+
+	// Set Info
+	info.Set("Portmaster (DNS only)", "0.0.1")
+
+	// Start
+	err := modules.Start()
+	if err != nil {
+		if err == modules.ErrCleanExit {
+			os.Exit(0)
+		} else {
+			err = modules.Shutdown()
+			if err != nil {
+				log.Shutdown()
+			}
+			os.Exit(1)
+		}
+	}
+
+	// Shutdown
+	// catch interrupt for clean shutdown
+	signalCh := make(chan os.Signal)
+	signal.Notify(
+		signalCh,
+		os.Interrupt,
+		syscall.SIGHUP,
+		syscall.SIGINT,
+		syscall.SIGTERM,
+		syscall.SIGQUIT,
+	)
+	select {
+	case <-signalCh:
+		fmt.Println(" <INTERRUPT>")
+		log.Warning("main: program was interrupted, shutting down.")
+		modules.Shutdown()
+	case <-modules.ShuttingDown():
+	}
+
+}