Better error handling.

cmd/zenity/main.go

@@ -405,10 +405,12 @@ func loadFlags() []zenity.Option {
 		ico = zenity.WarningIcon
 	case "dialog-password":
 		ico = zenity.PasswordIcon
-	default:
+	case unspecified:
 		ico = zenity.NoIcon
+	default:
+		opts = append(opts, zenity.CustomIcon(icon))
 	}
-	if icon != unspecified {
+	if ico != 0 {
 		opts = append(opts, ico)
 	}
 

entry_darwin.go

@@ -1,6 +1,8 @@
 package zenity
 
 import (
+	"os"
+
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -13,6 +15,10 @@ func entry(text string, opts options) (string, error) {
 	data.Options.Hidden = opts.hideText
 	data.Options.Timeout = zenutil.Timeout
 	if opts.customIcon != "" {
+		_, err := os.Stat(opts.customIcon)
+		if err != nil {
+			return "", err
+		}
 		data.IconPath = opts.customIcon
 	} else {
 		data.Options.Icon = opts.icon.String()

internal/zenutil/osa_generated.go

@@ -16,7 +16,11 @@ var scripts = template.Must(template.New("").Funcs(template.FuncMap{"json": func
 var app=Application.currentApplication()
 app.includeStandardAdditions=true
 app.activate()
-var res=app.chooseColor({defaultColor:{{json .}}})
+ObjC.import('stdio')
+ObjC.import('stdlib')
+try{var res=app.chooseColor({defaultColor:{{json .}}})}catch(e){if(e.errorNumber===-128)$.exit(1)
+$.dprintf(2,e)
+$.exit(-1)}
 {'rgb('+res.map(x=>Math.round(x*255))+')'}
 {{- end}}
 {{define "date" -}}
@@ -48,7 +52,8 @@ var res=alert.runModal
 switch(res){case $.NSAlertThirdButtonReturn:$.puts({{json .Extra}})
 case $.NSAlertSecondButtonReturn:$.exit(1)}
 var fmt=$.NSDateFormatter.alloc.init
-fmt.locale=$.NSLocale.localeWithLocaleIdentifier("en_US_POSIX");fmt.dateFormat={{json .Format}}
+fmt.locale=$.NSLocale.localeWithLocaleIdentifier("en_US_POSIX")
+fmt.dateFormat={{json .Format}}
 fmt.stringFromDate(date.dateValue)
 {{- end}}
 {{define "dialog" -}}
@@ -61,7 +66,9 @@ var opts={{json .Options}}
 {{- if .IconPath}}
 opts.withIcon=Path({{json .IconPath}})
 {{- end}}
-var res=app.{{.Operation}}({{json .Text}},opts)
+try{var res=app.{{.Operation}}({{json .Text}},opts)}catch(e){if(e.errorNumber===-128)$.exit(1)
+$.dprintf(2,e)
+$.exit(-1)}
 if(res.gaveUp){$.exit(5)}
 if(res.buttonReturned==={{json .Extra}}){$.puts(res.buttonReturned)
 $.exit(1)}
@@ -71,13 +78,21 @@ res.textReturned
 var app=Application.currentApplication()
 app.includeStandardAdditions=true
 app.activate()
-var res=app.{{.Operation}}({{json .Options}})
+ObjC.import('stdio')
+ObjC.import('stdlib')
+try{var res=app.{{.Operation}}({{json .Options}})}catch(e){if(e.errorNumber===-128)$.exit(1)
+$.dprintf(2,e)
+$.exit(-1)}
 if(Array.isArray(res)){res.join({{json .Separator}})}else{res.toString()}
 {{- end}}
 {{define "list" -}}
 var app=Application.currentApplication()
 app.includeStandardAdditions=true
-var res=app.chooseFromList({{json .Items}},{{json .Options}})
+ObjC.import('stdio')
+ObjC.import('stdlib')
+try{var res=app.chooseFromList({{json .Items}},{{json .Options}})}catch(e){$.dprintf(2,e)
+$.exit(-1)}
+if(res===false)$.exit(1)
 if(res.length!==0)res.join({{json .Separator}})
 {{- end}}
 {{define "notify" -}}
@@ -97,12 +112,10 @@ Progress.totalUnitCount={{.Total}}
 {{- if .Description}}
 Progress.description={{json .Description}}
 {{- end}}
-while(true){var s
+while(true){try{var s=$.readline('')}catch(e){if(e.errorNumber===-128)$.exit(1)
-try{s=$.readline('')}catch(e){if(e.errorNumber===-128)$.exit(1)
 break}
 if(s.indexOf('#')===0){Progress.additionalDescription=s.slice(1)
 continue}
 var i=parseInt(s)
-if(i>=0&&Progress.totalUnitCount>0){Progress.completedUnitCount=i
+if(i>=0&&Progress.totalUnitCount>0){Progress.completedUnitCount=i}}
-continue}}
 {{- end}}`))

internal/zenutil/osa_generator.go

@@ -31,6 +31,9 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
+		if bytes.ContainsAny(data, "`") {
+			log.Fatalf("illegal character: %s: `", name)
+		}
 		_, err = template.New(file.Name()).Funcs(funcs).Parse(string(data))
 		if err != nil {
 			log.Fatal(err)

internal/zenutil/osascripts/color.gojs

@@ -2,5 +2,15 @@ var app = Application.currentApplication()
 app.includeStandardAdditions = true
 app.activate()
 
+ObjC.import('stdio')
+ObjC.import('stdlib')
+
+try {
   var res = app.chooseColor({defaultColor: {{json .}}})
+} catch (e) {
+  if (e.errorNumber === -128) $.exit(1)
+  $.dprintf(2, e)
+  $.exit(-1)
+}
+
 {'rgb(' + res.map(x => Math.round(x * 255)) + ')'}

internal/zenutil/osascripts/date.gojs

@@ -35,6 +35,6 @@ case $.NSAlertSecondButtonReturn:
 }
 
 var fmt = $.NSDateFormatter.alloc.init
-fmt.locale = $.NSLocale.localeWithLocaleIdentifier("en_US_POSIX");
+fmt.locale = $.NSLocale.localeWithLocaleIdentifier("en_US_POSIX")
 fmt.dateFormat = {{json .Format}}
 fmt.stringFromDate(date.dateValue)

internal/zenutil/osascripts/dialog.gojs

@@ -10,7 +10,14 @@ var opts = {{json .Options}}
   opts.withIcon = Path({{json .IconPath}})
 {{- end}}
 
+try {
   var res = app.{{.Operation}}({{json .Text}}, opts)
+} catch (e) {
+  if (e.errorNumber === -128) $.exit(1)
+  $.dprintf(2, e)
+  $.exit(-1)
+}
+
 if (res.gaveUp) {
   $.exit(5)
 }

internal/zenutil/osascripts/file.gojs

@@ -2,7 +2,17 @@ var app = Application.currentApplication()
 app.includeStandardAdditions = true
 app.activate()
 
+ObjC.import('stdio')
+ObjC.import('stdlib')
+
+try {
   var res = app.{{.Operation}}({{json .Options}})
+} catch (e) {
+  if (e.errorNumber === -128) $.exit(1)
+  $.dprintf(2, e)
+  $.exit(-1)
+}
+
 if (Array.isArray(res)) {
   res.join({{json .Separator}})
 } else {

internal/zenutil/osascripts/list.gojs

@@ -1,5 +1,15 @@
 var app = Application.currentApplication()
 app.includeStandardAdditions = true
 
+ObjC.import('stdio')
+ObjC.import('stdlib')
+
+try {
   var res = app.chooseFromList({{json .Items}}, {{json .Options}})
+} catch (e) {
+  $.dprintf(2, e)
+  $.exit(-1)
+}
+
+if (res === false) $.exit(1)
 if (res.length !== 0) res.join({{json .Separator}})

internal/zenutil/osascripts/progress.gojs

@@ -13,9 +13,8 @@ ObjC.import('readline')
 {{- end}}
 
 while (true) {
-  var s
   try {
-    s = $.readline('')
+    var s = $.readline('')
   } catch (e) {
     if (e.errorNumber === -128) $.exit(1)
     break
@@ -29,6 +28,5 @@ while (true) {
   var i = parseInt(s)
   if (i >= 0 && Progress.totalUnitCount > 0) {
     Progress.completedUnitCount = i
-    continue
   }
 }

msg_darwin.go

@@ -1,6 +1,8 @@
 package zenity
 
 import (
+	"os"
+
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -21,6 +23,10 @@ func message(kind messageKind, text string, opts options) error {
 		data.Operation = "displayDialog"
 		data.Options.Title = opts.title
 		if opts.customIcon != "" {
+			_, err := os.Stat(opts.customIcon)
+			if err != nil {
+				return err
+			}
 			data.IconPath = opts.customIcon
 		} else {
 			data.Options.Icon = opts.icon.String()