Ember CLI和Ember.js在旧版本中存在一些构建时间问题。一个经常提到的解决方案是将堆栈升级到新版本。这意味着更新整个堆栈。
升级它以避免破坏整个项目的最佳策略是什么？
答案 0 :(得分：5)
使用ember-cli-update。 README包含有关如何使用全局npm包版本以及插件版本的说明。 它还可以选择运行codemods，以便轻松升级。
我建议最多从LTS迁移到LTS，因为您可能会在项目的依赖项中出现弃用。
答案 1 :(得分：3)
只需按照要升级到的版本的说明进行操作：https://github.com/ember-cli/ember-cli/releases
根据您的落后程度，您可能需要逐步升级。
当一切正常时，始终提交您的更改，以便在出现问题时有一个还原点。
完成Ember升级后，您可能希望升级依赖项。我建议您使用import java.util.*; // Provides TreeMap, Iterator, Scanner
import java.io.*; // Provides FileReader, FileNotFoundException
public class test2
{
public static void main(String[ ] args)
{
// **THIS CREATES A TREE MAP**
TreeMap<String, Integer> frequencyData = new TreeMap<String, Integer>();
Map<String, Set<String>> filenames = new HashMap<String, Set<String>>();
Map<String, Integer> countByWords = new HashMap<String, Integer>();
Map[] mapArray = new Map[5];
mapArray[0] = new HashMap<String, Integer>();
readWordFile(countByWords, frequencyData, filenames);
printAllCounts(countByWords, frequencyData, filenames);
}
public static int getCount(String word, TreeMap<String, Integer> frequencyData)
{
if (frequencyData.containsKey(word))
{ // The word has occurred before, so get its count from the map
return frequencyData.get(word); // Auto-unboxed
}
else
{ // No occurrences of this word
return 0;
}
}
public static void printAllCounts( Map<String, Integer> countByWords, TreeMap<String, Integer> frequencyData, Map<String, Set<String>> filenames)
{
System.out.println("-----------------------------------------------");
System.out.print("Search for a word: ");
String worde;
int result = 0;
Scanner input = new Scanner(System.in);
worde=input.nextLine();
if(!filenames.containsKey(worde)){
System.out.println("The word does not exist");
}
else{
for(String filename : filenames.get(worde)){
System.out.println(filename);
System.out.println(countByWords.get(worde));
}
}
System.out.println("\n-----------------------------------------------");
}
public static void readWordFile(Map<String, Integer> countByWords ,TreeMap<String, Integer> frequencyData, Map<String, Set<String>> filenames)
{
Scanner wordFile;
String word; // A word read from the file
Integer count; // The number of occurrences of the word
int counter = 0;
int docs = 0;
//**FOR LOOP TO READ THE DOCUMENTS**
for(int x=0; x<Docs.length; x++)
{ //start of for loop [*
try
{
wordFile = new Scanner(new FileReader(Docs[x]));
}
catch (FileNotFoundException e)
{
System.err.println(e);
return;
}
while (wordFile.hasNext( ))
{
// Read the next word and get rid of the end-of-line marker if needed:
word = wordFile.next( );
// This makes the Word lower case.
word = word.toLowerCase();
word = word.replaceAll("[^a-zA-Z0-9\\s]", "");
// Get the current count of this word, add one, and then store the new count:
count = countByWords.get(word);
if(count != null){
countByWords.put(word, count + 1);
}
else{
countByWords.put(word, 1);
}
Set<String> filenamesForWord = filenames.get(word);
if (filenamesForWord == null) {
filenamesForWord = new HashSet<String>();
}
filenamesForWord.add(Docs[x]);
filenames.put(word, filenamesForWord);
counter++;
docs = x + 1;
}
} //End of for loop *]
System.out.println("There are " + counter + " terms in the collection.");
System.out.println("There are " + docs + " documents in the collection.");
}
// Array of documents
static String Docs [] = {"Document1.txt", "Document2.txt", "Document3.txt"};
}
和yarn upgrade-interactive查看您要升级到的新版本是否超出了yarn outdated中指定的版本。
您可以尝试一次升级所有内容，但如果遇到问题，可能需要逐个升级软件包。我通常这样做：升级一切，希望没有问题。如果有问题，那么我重置为上次稳定提交。然后我只升级我认为一次性低风险的软件包，然后逐个升级风险更高的软件包。原因是，有时当您同时升级多个软件包并且测试失败时，可能很难确定导致问题的软件包。