WIP: progress (macOS).

internal/zenutil/osascripts/progress.js

@@ -0,0 +1,37 @@
+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
+}