WIP: progress (macOS).

internal/zenutil/osa_generated.go

@@ -49,3 +49,23 @@ var app=Application.currentApplication()
 app.includeStandardAdditions=true
 void app.displayNotification({{json .Text}},{{json .Options}})
 {{- end}}`))
+
+var progress =`
+var app=Application.currentApplication()
+app.includeStandardAdditions=true
+app.activate()
+ObjC.import('stdlib')
+ObjC.import('readline')
+function run(args){Progress.totalUnitCount=100
+Progress.completedUnitCount=0
+Progress.description=args[0]||"Progress"
+Progress.additionalDescription=args[1]||"Running..."
+while(true){var s
+try{s=$.readline('')}catch(e){if(e.errorNumber===-128)$.exit(1)
+break}
+if(s.indexOf('#')===0){Progress.additionalDescription=s.slice(1).trim()
+continue}
+var i=parseInt(s)
+if(Number.isSafeInteger(i)){Progress.completedUnitCount=i
+continue}}
+Progress.completedUnitCount=100}`

internal/zenutil/osa_generator.go

@@ -4,7 +4,6 @@ package main
 
 import (
 	"bytes"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -17,21 +16,21 @@ import (
 func main() {
 	dir := os.Args[1]
 
-	files, err := ioutil.ReadDir(dir)
+	files, err := os.ReadDir(dir)
 	if err != nil {
 		log.Fatal(err)
 	}
 
+	var args struct {
+		Templates string
+		Progress  string
+	}
+
 	var str strings.Builder
 
 	for _, file := range files {
 		name := file.Name()
-
-		str.WriteString("\n" + `{{define "`)
-		str.WriteString(strings.TrimSuffix(name, filepath.Ext(name)))
-		str.WriteString(`" -}}` + "\n")
-
-		data, err := ioutil.ReadFile(filepath.Join(dir, name))
+		data, err := os.ReadFile(filepath.Join(dir, name))
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -40,8 +39,16 @@ func main() {
 			log.Fatal(err)
 		}
 
-		str.Write(data)
-		str.WriteString("\n{{- end}}")
+		name = strings.TrimSuffix(name, filepath.Ext(name))
+		if name == "progress" {
+			args.Progress = string(data)
+		} else {
+			str.WriteString("\n" + `{{define "`)
+			str.WriteString(name)
+			str.WriteString(`" -}}` + "\n")
+			str.Write(data)
+			str.WriteString("\n{{- end}}")
+		}
 	}
 
 	out, err := os.Create("osa_generated.go")
@@ -49,7 +56,8 @@ func main() {
 		log.Fatal(err)
 	}
 
-	err = generator.Execute(out, str.String())
+	args.Templates = str.String()
+	err = generator.Execute(out, args)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -108,5 +116,6 @@ import (
 var scripts = template.Must(template.New("").Funcs(template.FuncMap{"json": func(v interface{}) (string, error) {
 	b, err := json.Marshal(v)
 	return string(b), err
-}}).Parse(` + "`{{.}}`" + `))
-`))
+}}).Parse(` + "`{{.Templates}}`" + `))
+
+var progress =` + "`\n{{.Progress}}`\n"))

internal/zenutil/osascripts/progress.js

@@ -15,8 +15,7 @@ function run(args) {
         var s
         try {
             s = $.readline('')
-        }
-        catch (e) {
+        } catch (e) {
             if (e.errorNumber === -128) $.exit(1)
             break
         }

internal/zenutil/run_darwin.go

@@ -1,12 +1,16 @@
 package zenutil
 
 import (
+	"bytes"
 	"context"
 	"io/ioutil"
 	"os"
 	"os/exec"
+	"path/filepath"
+	"strconv"
 	"strings"
 	"syscall"
+	"time"
 )
 
 // Run is internal.
@@ -47,6 +51,123 @@ func Run(ctx context.Context, script string, data interface{}) ([]byte, error) {
 	return cmd.Output()
 }
 
+func RunProgress(ctx context.Context) (m *progressMonitor, err error) {
+	t, err := ioutil.TempDir("", "")
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			os.RemoveAll(t)
+		}
+	}()
+
+	var cmd *exec.Cmd
+	name := filepath.Join(t, "progress.app")
+
+	cmd = exec.Command("osacompile", "-l", "JavaScript", "-o", name)
+	cmd.Stdin = strings.NewReader(progress)
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	plist := filepath.Join(name, "Contents/Info.plist")
+
+	cmd = exec.Command("defaults", "write", plist, "LSUIElement", "true")
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	cmd = exec.Command("defaults", "write", plist, "CFBundleName", "")
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	var executable string
+	cmd = exec.Command("defaults", "read", plist, "CFBundleExecutable")
+	if out, err := cmd.Output(); err != nil {
+		return nil, err
+	} else {
+		out = bytes.TrimSuffix(out, []byte{'\n'})
+		executable = filepath.Join(name, "Contents/MacOS", string(out))
+	}
+
+	cmd = exec.Command(executable)
+	pipe, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, err
+	}
+	if err = cmd.Start(); err != nil {
+		return nil, err
+	}
+	if ctx == nil {
+		ctx = context.Background()
+	}
+
+	m = &progressMonitor{
+		done:  make(chan struct{}),
+		lines: make(chan string),
+	}
+	go func() {
+		defer func() {
+			pipe.Close()
+			err := cmd.Wait()
+			if cerr := ctx.Err(); cerr != nil {
+				err = cerr
+			}
+			m.err = err
+			close(m.done)
+			os.RemoveAll(t)
+		}()
+		for {
+			var line string
+			select {
+			case s, ok := <-m.lines:
+				if !ok {
+					return
+				}
+				line = s
+			case <-ctx.Done():
+				return
+			case <-time.After(40 * time.Millisecond):
+			}
+			if _, err := pipe.Write([]byte(line + "\n")); err != nil {
+				return
+			}
+		}
+	}()
+	return
+}
+
+type progressMonitor struct {
+	err   error
+	done  chan struct{}
+	lines chan string
+}
+
+func (m *progressMonitor) send(line string) error {
+	select {
+	case m.lines <- line:
+		return nil
+	case <-m.done:
+		return m.err
+	}
+}
+
+func (m *progressMonitor) Close() error {
+	close(m.lines)
+	<-m.done
+	return m.err
+}
+
+func (m *progressMonitor) Message(msg string) error {
+	return m.send("#" + msg)
+}
+
+func (m *progressMonitor) Progress(progress int) error {
+	return m.send(strconv.Itoa(progress))
+}
+
 // File is internal.
 type File struct {
 	Operation string

progress.go

@@ -0,0 +1,7 @@
+package zenity
+
+type ProgressMonitor interface {
+	Message(string) error
+	Progress(int) error
+	Close() error
+}