Develop Reference

Bitbucket Repository Hook: create PullRequest with source and targetBranch in Java

I want to develop a hook that will automatically merge a branch (always the same one) into the master when smth happens. This should happen because there are some strange diffs when pull requests are opened and we found out that this merging is the solution.
So I am working with the BitBucket Server API and I found the class PullRequestCreateRequest and the interface PullRequestService
This is what I got atm:
if (MYCONDITION)
{
PullRequestImpl pullRequest = new PullRequestImpl(); //class that implements PullRequestService
PullRequestCreateRequest prCreate = new PullRequestCreateRequest.Builder()
.title("Automatic Merge Branch Foo Into Master")
.description("blablabla")
.repository(request.getRepository()) //from head of the method
//.fromBranch("MyBranch") HELP pls
.toBranchId("master")
.build();
pullRequest.create(prCreate);
pullRequest.merge(prCreate);
}
My Problem is, that I don't know how to specify my source branch. I searched in the Doc, but just found some RefIds, etc.
Has someone an idea?
Btw: I create the PR first because it's not allowed to merge directly into the master and I can't change this.

Use fromRefId():
PullRequestCreateRequest prCreate = new PullRequestCreateRequest.Builder()
.title("Automatic Merge Branch Foo Into Master")
.description("blablabla")
.repository(request.getRepository())
.fromRefId("Foo") //<-- here you go
.toBranchId("master")
.build();

How to get all changed files since some commit in jGit?

TreeWalk allows to get all changes in single commit or in whole repository and checking changed files for each commit (by RevWalk) works really slow, about 2 minutes. Is there any method to walk through changed files and check in which commit they has been changed last time? Or other faster solution?
Here is my code for getting changed files from commit:
TreeWalk treeWalk = prepareTreeWalk(commit, git.getRepository());
List<String> files = new ArrayList<>();
while (treeWalk.next()) {
if (!hasSimilar(treeWalk)) {
files.add(treeWalk.getPathString());
}
}
and for selecting commits (since some special):
return Lists.reverse(StreamSupport.stream(
git.log()
.add(git.getRepository().resolve(branch.getName()))
.call()
.spliterator(), false)
.filter(since(sinceCommit::equals))
.collect(Collectors.toList()));

I know command line below, it will print the output within ms
git format-patch initial-commit --stdout > output.patch

recognize parameter change from git repository

I want to extract signature changes (method parameter changes to be exact) from commits to git repository by a java program. I have used the following code:
for (Ref branch : branches) {
String branchName = branch.getName();
for (RevCommit commit : commits) {
boolean foundInThisBranch = false;
RevCommit targetCommit = walk.parseCommit(repo.resolve(
commit.getName()));
for (Map.Entry<String, Ref> e : repo.getAllRefs().entrySet()) {
if (e.getKey().startsWith(Constants.R_HEADS)) {
if (walk.isMergedInto(targetCommit, walk.parseCommit(
e.getValue().getObjectId()))) {
String foundInBranch = e.getValue().getName();
if (branchName.equals(foundInBranch)) {
foundInThisBranch = true;
break;
}
}
}
}
I can extract commit message, commit data and Author name from that, however, I am not able to extract parameter changes from them. I mean it is unable for me to identify parameter changes. I want to know if there is any way to recognize that. I mean it is impossible to recognize them from commit notes that are generated by programmers; I am looking for something like any specific annotation or something else.
This is my code to extract differences:
CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
oldTreeIter.reset(reader, oldId);
CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
newTreeIter.reset(reader, headId);
List<DiffEntry> diffs= git.diff()
.setNewTree(newTreeIter)
.setOldTree(oldTreeIter)
.call();
ByteArrayOutputStream out = new ByteArrayOutputStream();
DiffFormatter df = new DiffFormatter(out);
df.setRepository(git.getRepository());
The export is really huge and impossible to extract method changes.

You show a way you've found to examine the diffs, but say that the output is too large and you can't extract the method signature changes. If by that you mean that you're asking about specific git support for telling you that a method signature changes, then no - no such support exists. This is because git does not "know" anything about the languages you may or may not have used in the files under source control. Everything is just content that is, or is not, different from other content.
Since a method signature could be split across lines in any number of ways, it's not even guaranteed that just because a method's signature changed its name would appear anywhere in the diff. What you would really have to do is perform a sort of "structural diff". That is, you would have to
check out the "old" version, and pass it to a java parser
check out the "new" version, and pass it to a java parser
compare the resulting parse trees, looking for methods that belong to the same object, but have changed
Even that won't be terribly easy, because methods could be renamed, and because method overloading could make it unclear which signature change goes with which version of a method.
From there what you have is a non-trivial coding problem, which is beyond the scope of SO to answer. If you decide to tackle this problem and run into specific programming questions along the way, of course you could post those questions and perhaps someone will be able to help.

How to Get a Log Between Two Branches Using SvnKit?

I have a branch structure like this.
How can I get an svn log between two revisions in different branches using SvnKit (for example, a revision from branch 5A.1 and a revision from branch 2B.3), excluding already merged revisions?
I know, how to do it inside single branch using SvnLog operation:
// factory - SvnOperationFactory instance
SvnLog svnLog = factory.createLog();
// target - SvnTarget instance, created from branch URL
// using SvnTarget.fromURL(SVNURL.parseURIEncoded(branchPath))
// my problem is there: how to tell svnLog that I need a diffrence
// between two different branches?
// Adding a second target won't solve my problem, I suppose
svnLog.addTarget(target);
// if you need to go deeper in history, set to "false"
// if you looking for revisions only inside this branch, set to "true"
svnLog.setStopOnCopy(stopOnCopy);
// if you need to include merged revisions too
svnLog.setUseMergeHistory(useMergeHistory);
SVNRevision startRev = SVNRevision.create(startRevNumber);
SVNRevision endRev = SVNRevision.create(startRevNumber);
svnLog.addRange(SvnRevisionRange.create(startRev, endRev));
// the limit of SvnLogEntry items
svnLog.setLimit(limit);
return svnLog.run(null);
There is some kind of misunderstanding that I can't handle with.
SvnKit version is 1.8.7

Most likely you should use SvnLogMergeInfo. Check out this solution:
How to use SVNKit to get the list of all revisions merged from one branch to another?

Not possible to pass multiple files per commit per GitHub API?

I already use the GitHub API to make automated commits.
For this I'm using a Java Library from Kohsuke
It works with this API command:
Create a file
This method creates a new file in a repository
PUT /repos/:owner/:repo/contents/:path
But is it possible to include multiple files in 1 Commit per GitHub API?

The following code snippit will allow you to prepare a commit with multiple files, then associate a new branch to it, using the Java library from Kohsuke
// start with a Repository ref
GHRepository repo = ...
// get a sha to represent the root branch to start your commit from.
// this can come from any number of classes:
// GHBranch, GHCommit, GHTree, etc...
// for this example, we'll start from the master branch
GHBranch masterBranch = repo.getBranch("master");
// get a tree builder object to build up into the commit.
// the base of the tree will be the master branch
GHTreeBuilder treeBuilder = repo.createTree().baseTree(masterBranch.getSHA1());
// add entries to the tree in various ways.
// the nice thing about GHTreeBuilder.textEntry() is that it is an "upsert" (create new or update existing)
treeBuilder = treeBuilder.textEntry(pathToFile, contentOfFile, executable);
// repeat calls of treeBuider.textEntry() or .shaEntry() or .entry() ....
// perform the commit
GHCommit commit = repo.createCommit()
// base the commit on the tree we built
.tree(treeBuilder.create().getSha())
// set the parent of the commit as the master branch
.parent(masterBranch.getSHA1()).message("multi-file commit").create();
// create a new branch from that commit
String newBranchName = "myNewBranchName";
GHRef newRef = repo.createRef("/refs/heads/" + newBranchName, commit.getSHA1();
GHBranch newBranch = repo.getBranch(newBranchName);

Extending on Dan Dowma's answer, it is possible to push these changes to an existing branch
final String branchName = "main";
// start with a Repository ref
GHRepository repo = ...
// get a sha to represent the root branch to start your commit from.
// this can come from any number of classes:
// GHBranch, GHCommit, GHTree, etc...
// for this example, we'll start from the selected branch
GHBranch selectedBranch = repo.getBranch(branchName);
// get a tree builder object to build up into the commit.
// the base of the tree will be the master branch
GHTreeBuilder treeBuilder = repo.createTree().baseTree(selectedBranch.getSHA1());
// add entries to the tree.
treeBuilder = treeBuilder.add(pathToFile, contentOfFile, executable);
// perform the commit
GHCommit commit = repo.createCommit()
// base the commit on the tree we built
.tree(treeBuilder.create().getSha())
// set the parent of the commit as the master branch
.parent(selectedBranch.getSHA1()).message("multi-file commit").create();
// Update an existing branch from that commit
GHRef existingBranchRef = repo.getRef("/refs/heads/" + branchName);
existingBranchRef.updateTo(commit.getSHA1());

Not sure if this is what you want, maybe a little bit more description would help, but take a look at this:
https://developer.github.com/v3/git/