Allow to copy multiple commands and command with line continuation

Author: ggrossetie

src/js/07-copy-to-clipboard.js

@@ -1,5 +1,7 @@
 ;(function () {
   'use strict'
+  var commandContinuationRx = /\\\s*$/
+
   ;[].slice.call(document.querySelectorAll('.doc pre.highlight, .doc .literalblock pre')).forEach(function (pre) {
     var code, language, lang, copy, toast, toolbox
     if (pre.classList.contains('highlight')) {
@@ -51,7 +53,29 @@
 
   function writeToClipboard (code) {
     var text = code.innerText
-    if (code.dataset.lang === 'console' && text.startsWith('$ ')) text = text.split('\n')[0].slice(2)
+    if (code.dataset.lang === 'console' && text.startsWith('$ ')) {
+      var lines = text.split('\n')
+      var currentCommand = ''
+      var commands = []
+      var commandContinuationFound = false
+      for (var i = 0; i < lines.length; i++) {
+        var line = lines[i]
+        if (!commandContinuationFound && !line.startsWith('$ ')) {
+          // ignore, command output
+        } else {
+          if (commandContinuationFound) {
+            currentCommand += '\n' + line
+          } else if (line.startsWith('$ ')) {
+            currentCommand = line.slice(2)
+          }
+          commandContinuationFound = line.match(commandContinuationRx)
+          if (!commandContinuationFound) {
+            commands.push(currentCommand)
+          }
+        }
+      }
+      text = commands.join('; ')
+    }
     window.navigator.clipboard.writeText(text).then(
       function () {
         this.classList.add('clicked')