如何在JGit中计算插入/删除的行数

Question

当我们这样做时,git log --shortstat我们得到插入,删除和更改的行数.就像是:

1 file changed, 9 insertions(+), 3 deletions(-)

请帮助我获取插入,删除和更改的行数.

1. 我正在做一个存储库克隆来获取本地机器上的git项目.这是相同的代码:

   RepoClone repoClone=new RepoClone();
   repoClone.repoCloner();
   repository =         builder.setGitDir(repoClone.repoDir).setMustExist(true).build();
   

2. 我甚至能得到一个TreeWalk:

   TreeWalk treeWalk=getCommitsTreeWalk();
   

3. 我能够检索文件名,每个文件的提交次数,LOC以及处理每个xml/java文件的开发人员数量.

   while (treeWalk.next()) {
     if (treeWalk.getPathString().endsWith(".xml") || treeWalk.getPathString().endsWith(".java")) {
       jsonDataset = new JSONObject();
       countDevelopers = new HashSet < String > ();
       count = 0;
       logs = new Git(repository).log().addPath(treeWalk.getPathString()).call();
       for (RevCommit rev: logs) {
         countDevelopers.add(rev.getAuthorIdent().getEmailAddress());
         count++;
       }
       jsonDataset.put("FileName", treeWalk.getPathString());
       jsonDataset.put("CountDevelopers", countDevelopers.size());
       jsonDataset.put("CountCommits", count);
       jsonDataset.put("LOC", countLines(treeWalk.getPathString()));
       commitDetails.put(jsonDataset);
     }
   }
   

4. 现在,我想检索每个文件插入和删除的行数.

请帮忙.提前感谢.

Answer 1

以下代码片段比较两个提交并打印更改.diffFormatter.scan()返回一个DiffEntrys 列表,每个列表描述添加,删除或修改的文件.每个差异条目依次具有一个HunkHeaders 列表,这些列表描述了该文件中的变化.

// Create two commits to be compared
File file = new File( git.getRepository().getWorkTree(), "file.txt" );
writeFile( file, "line1\n" );
RevCommit oldCommit = commitChanges();
writeFile( file, "line1\nline2\n" );
RevCommit newCommit = commitChanges();

// Obtain tree iterators to traverse the tree of the old/new commit
ObjectReader reader = git.getRepository().newObjectReader();
CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
oldTreeIter.reset( reader, oldCommit.getTree() );
CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
newTreeIter.reset( reader, newCommit.getTree() );

// Use a DiffFormatter to compare new and old tree and return a list of changes
DiffFormatter diffFormatter = new DiffFormatter( DisabledOutputStream.INSTANCE );
diffFormatter.setRepository( git.getRepository() );
diffFormatter.setContext( 0 );
List<DiffEntry> entries = diffFormatter.scan( newTreeIter, oldTreeIter );

// Print the contents of the DiffEntries
for( DiffEntry entry : entries ) {
  System.out.println( entry );
  FileHeader fileHeader = diffFormatter.toFileHeader( entry );
  List<? extends HunkHeader> hunks = fileHeader.getHunks();
  for( HunkHeader hunk : hunks ) {
    System.out.println( hunk );
  }
}

我认为通过提供的信息DiffEntry,HunkHeader您应该能够获得所需的信息--shortstat.