Slightly kludgy workaround for gtk-3.20 dependence in gtk-3.18 builds.

Added SGFW_CONF environment variable for overriding default SGFW configuration path.
Added SGFW_SOCKS_CONFIG environment variable for overriding default SGFW SOCKS json config file path.
Updated readme with information on building outside SGOS.

README-DEV.txt

@@ -1,3 +1,15 @@
+*** Please also refer to the notes found in fw-prompt/README.txt: you will need to copy both files in sources/etc/dbus-1/system.d/ into /etc/dbus-1/system.d/
+
+Build complications:
+You may need to run the following first, esp. on Ubuntu 16.04:
+go install -tags gtk_3_18 github.com/gotk3/gotk3/gtk
+
+and build with the following:
+go build -v -tags gtk_3_18 -gcflags "-N -l" fw-prompt
+
+Otherwise standard go build and go install procedures should suffice.
+
+
 Before running fw-daemon, make sure to export: GODEBUG=cgocheck=0
 
 Also, here's a default fw-daemon-socks.json config file:

fw-settings/builder.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"regexp"
 	"reflect"
 
 	"github.com/gotk3/gotk3/glib"
@@ -35,6 +36,19 @@ func builderForDefinition(uiName string) *gtk.Builder {
 
 	template := getDefinitionWithFileFallback(uiName)
 
+	maj := gtk.GetMajorVersion()
+	min := gtk.GetMinorVersion()
+
+	if ((maj == 3) && (min < 20)) {
+		fmt.Fprintf(os.Stderr,
+			"Attempting runtime work-around for older versions of libgtk-3...\n");
+		dep_re := regexp.MustCompile(`<\s?property\s+name\s?=\s?"icon_size"\s?>.+<\s?/property\s?>`)
+		template = dep_re.ReplaceAllString(template, ``)
+
+		dep_re2 := regexp.MustCompile(`version\s?=\s?"3.20"`)
+		template = dep_re2.ReplaceAllString(template, `version="3.18"`)
+	}
+
 	builder, err := gtk.BuilderNew()
 	if err != nil {
 		//We cant recover from this

sgfw/config.go

@@ -27,7 +27,13 @@ type FirewallConfigs struct {
 var FirewallConfig FirewallConfigs
 
 func _readConfig(file string) []byte {
-	f, err := os.Open(configDefaultPath)
+	envFile := os.Getenv("SGFW_CONF")
+
+        if envFile != "" {
+		file = envFile
+	}
+
+	f, err := os.Open(file)
 	if err != nil {
 		log.Warning(err.Error())
 		return []byte{}

sgfw/prompt.go

@@ -53,11 +53,11 @@ func (p *prompter) prompt(policy *Policy) {
 func (p *prompter) promptLoop() {
 	p.lock.Lock()
 	for {
-		fmt.Println("promptLoop() outer")
+//		fmt.Println("XXX: promptLoop() outer")
 		for p.processNextPacket() {
-			fmt.Println("promptLoop() inner")
+//			fmt.Println("XXX: promptLoop() inner")
 		}
-		fmt.Println("promptLoop() wait")
+//		fmt.Println("promptLoop() wait")
 		p.cond.Wait()
 	}
 }

sgfw/sgfw.go

@@ -241,7 +241,13 @@ func Main() {
 
 	wg := sync.WaitGroup{}
 
-	config, err := loadSocksConfiguration(defaultSocksCfgPath)
+	scfile := os.Getenv("SGFW_SOCKS_CONFIG")
+
+	if scfile == "" {
+		scfile = defaultSocksCfgPath
+	}
+
+	config, err := loadSocksConfiguration(scfile)
 	if err != nil && !os.IsNotExist(err) {
 		panic(err)
 	}
@@ -250,7 +256,7 @@ func Main() {
 		chain := NewSocksChain(socksConfig, &wg, fw)
 		chain.start()
 	} else {
-		log.Notice("Did not find SOCKS5 configuration file at", defaultSocksCfgPath, "; ignoring subsystem...")
+		log.Notice("Did not find SOCKS5 configuration file at", scfile, "; ignoring subsystem...")
 	}
 
 	dbusp, err = newDbusObjectPrompt()

sources/etc/sgfw/sgfw.conf

@@ -0,0 +1,5 @@
+log_level="NOTICE"
+log_redact=false
+prompt_expanded=true
+prompt_expert=true
+default_action="SESSION"