Announcing the public preview of GitHub Advanced Security for Azure DevOps
GitHub Advanced Security for Azure DevOps is now available for public preview, making GitHub’s same application security testing tools natively available on Azure Repos.
Picking up where Kyle left off in his Branch List post, we're all very excited to announce a new feature designed to ease the process of comparing two points in…
Picking up where Kyle left off in his Branch List post, we’re all very
excited to announce a new feature designed to ease the process of
comparing two points in a repository’s history. It’s called
GitHub Compare View and it’s going to change the way you review code.
The Compare View brings all information needed to determine what changed
over a series of commits onto a single page: a condensed commit list in
chronological order, followed by a rollup diff of all changes between
the two points, followed by any relevant commit comments. All in the
same place and with a single well-defined URL.
It’s a versatile feature with many potential uses. Some of our favorites
are detailed below with links to live examples of Compare View in
Reviewing topic branches is a fundamental activity for anyone
maintaining an active open source project or working with a team on a
private project. Until now, the easiest way to do a thorough review of a
complex topic branch was to drop down to the shell and run some
combination of the
git cherry, and
git diff commands.
With Compare View, we’ve taken that process and put it behind a single
URL, so jumping into the review process is usually as simple as
following a link.
Follow the examples below to see it live:
Edit: These branches have been removed since the publishing of this post and can no longer be shown.
While Compare View was initially designed to supplement our code review
process, we quickly found that it was useful in a variety of other
scenarios. Projects that are diligent about tagging can use Compare View
to generate a comprehensive list of changes between any two releases.
A few examples in the wild:
The commit range determines the starting and ending point to use in the
comparison. It looks like this:
Here, we’re reviewing the
proxy_owner topic branch using the
branch as the starting point. Hitting the
button switches the starting and ending points. Clicking the starting
or ending point label brings up the ref selector:
Enter any branch, tag, or commit SHA1 in the little box there and get
an instant preview of the newly selected revision. Hit Save & Refresh
once you’re happy with the selection.
We’ve seen what the Compare View feels like and how to change the commit
range once there, but how do you get to a Compare View in the first
master) and the
We wanted Compare View to be something we could link to from external
sites and services anytime we were referring to a range of commits in a
git repository. As such, we thought it would be worthwhile to document
the basic structure of a Compare View URL:
<REPO> are obvious, and
<END> are branch names, tag names, or commit SHA1s specifying the
range of history to compare. If
<START> is omitted, the
repository’s default branch is assumed.
Compare View is the first of many code review related features we plan
to introduce this year. We’ll be incorporating Compare View into other
areas of the site and developing entirely new features with Compare View
as a core component.
That being said, we felt it was important that the basic task of
comparing two points in a repository’s history stand on its own and have
a well defined URL so that the feature is useful in a broad number of
circumstances. If everything goes to plan, you’ll be seeing Compare View
links tossed around on mailing lists, forums, IRC channels, Campfire,
blog posts, release announcements, issue trackers, etc. in the very
"git-rev-parse(1) man page"