git-pr: do not assume a master branch

[edvbld]

Hi all,

please review this patch that makes git pr work even though no master branch
is present (which is the case if you clone a repository that uses a different
default branch). The fix consists of two parts:

• Use a better algorithm for detecting the target branch. git pr create will
  now pick the "closest" branch that exists in the upstream (parent) repository
  as the target branch by default.
• Read the .jcheck/conf file from the target branch

Testing:

• Manually tested git pr create on different repositories on Linux x64

Thanks,
Erik

Progress

• Change must not contain extraneous whitespace
• Change must be properly reviewed

Approvers

• Robin Westberg (rwestberg - Reviewer)

[bridgekeeper]

👋 Welcome back ehelin! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request.

[mlbridge]

Webrevs

• 00: Full (1fa953e)

[rwestberg]

Looks good!

[openjdk]

@edvbld This change now passes all automated pre-integration checks. When the change also fulfills all project specific requirements, type /integrate in a new comment to proceed. After integration, the commit message will be:

git-pr: do not assume a master branch

Reviewed-by: rwestberg

• If you would like to add a summary, use the /summary command.
• To credit additional contributors, use the /contributor command.
• To add additional solved issues, use the /solves command.

Since the source branch of this PR was last updated there has been 1 commit pushed to the master branch. Since there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid automatic rebasing, please merge master into your branch, and then specify the current head hash when integrating, like this: /integrate 27af764dd4f5bb8bee2f0c228e0138165e48d593.

➡️ To integrate this PR with the above commit message, type /integrate in a new comment.

[edvbld]

/integrate

[openjdk]

@edvbld The following commits have been pushed to master since your change was applied:

• 27af764: Remove unnecessary merge test

Your commit was automatically rebased without conflicts.

Pushed as commit 4637c1b.

[mlbridge]

Mailing list message from Erik Helin on skara-dev:

Changeset: 4637c1b
Author: Erik Helin <ehelin at openjdk.org>
Date: 2020-02-10 09:42:02 +0000
URL: https://git.openjdk.java.net/skara/commit/4637c1b5

git-pr: do not assume a master branch

Reviewed-by: rwestberg

! cli/src/main/java/org/openjdk/skara/cli/GitPr.java
! vcs/src/main/java/org/openjdk/skara/vcs/ReadOnlyRepository.java
! vcs/src/main/java/org/openjdk/skara/vcs/git/GitRepository.java
! vcs/src/main/java/org/openjdk/skara/vcs/hg/HgRepository.java