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How To Review A Pull Request?

How To Review A Pull Request
Submitting your review – After you’ve finished reviewing all the files you want in the pull request, submit your review.

  1. On the pull request, click Files changed,
  2. Above the changed code, click Review changes,
  3. Type a comment summarizing your feedback on the proposed changes.
  4. Select the type of review you’d like to leave:
    • Select Comment to leave general feedback without explicitly approving the changes or requesting additional changes.
    • Select Approve to submit your feedback and approve merging the changes proposed in the pull request.
    • Select Request changes to submit feedback that must be addressed before the pull request can be merged.
  5. Click Submit review,

Tips :

  • If a collaborator with admin, owner, or write access to the repository submits a review requesting changes, the pull request cannot be merged until the same collaborator submits another review approving the changes in the pull request.
  • Repository owners and administrators can merge a pull request even if it hasn’t received an approving review, or if a reviewer who requested changes has left the organization or is unavailable.
  • If both required reviews and stale review dismissal are enabled and a code-modifying commit is pushed to the branch of an approved pull request, the approval is dismissed. The pull request must be reviewed and approved again before it can be merged.
  • When several open pull requests each have a head branch pointing to the same commit, you won’t be able to merge them if one or both have a pending or rejected review.
  • If your repository requires approving reviews from people with write or admin permissions, then any approvals from people with these permissions are denoted with a green check mark, and approvals from people without these permissions have a gray check mark. Approvals with a gray check mark do not affect whether the pull request can be merged.
  • Pull request authors cannot approve their own pull requests.

What does it mean to review a pull request?

Required reviews – Repository administrators or custom roles with the “edit repository rules” permission can require that all pull requests receive a specific number of approving reviews before someone merges the pull request into a protected branch.

How quickly should pull requests be reviewed?

Code and Climate Change. Blog about software development in ClimateTech We’ve had some discussion at SCADA MINDS about what the best size of a pull request is, so I’ve been looking at what the internet thinks. Let’s dive in! People tend to suggest very small pull requests as the optimum.E.g.

See,, that both suggest 2-400 lines for a pull request. A lot of teams have done their own study of pull request efficiency, but a lot of them also seem to rely on the SmartBeart study, which is worth a read. In the SmartBear study they tested defect rates and optimum code review sizes during 10 months and 2500 pull requests.

Their findings seem to be in line with a lot of the other recommendations, but briefly summarized:

Review no more than 400 lines of code at a time Do not review for more than 60 minutes at a time – your efficiency starts to drop off heavily

These two metrics put a pretty big damper on how big pull requests can be, at least if they are to be reviewed in one go. But there’s also a time cost involved with creating multiple smaller pull requests which you potentially can calculate up against the cost of having larger pull requests that go unmerged.

This article does a good job of weighing those two costs up against each other, and end up recommending a pull request size where the key metric is that it shouldn’t take longer than 1 hour to review it. They have a good point that as your pull request grows, so does the risk that you have implemented the wrong thing.

That risk is mitigated by smaller pull requests or factors like good problem understanding, design reviews or pair programming.

What should I look for when reviewing PRS?

Judging how critical a feature is – Why is it important to judge how critical a feature is? Just as development can be done in a multitude of ways, code reviewing is not an exact science. I generally rely on two cues to decide how I will be reviewing a PR: pattern uniqueness and durability of feature.

They will directly impact the speed of the review, as well as the amount of comment and question I leave in a PR. Pattern Uniqueness When reviewing PRs the first thing I do is to quickly scroll through the whole list of changes, and in about 20 seconds I can get a very good idea of how long this review is going to take me.

That’s because I generally look for patterns, and structures similar to the ones I have worked with. If something is consistent I can easily skip a lot of the mental processing and understand quickly what is going on. It might be that the types used are consistent, the method signatures or the ways modules are created.

Even if it is less efficient, consistency will generally yield better results from a developer’s point of view because it makes a codebase easier to understand. When the patterns used are similar, we can easily infer what the result will be. At a moment or another, we will be brought to using different patterns in our code.

It might be a new authorisation library, or just a different way to write functions. On one hand those new patterns will increase code complexity, and will require the reviewer to spend extra effort in understanding what is happening. On the other hand, this is also a way for the reviewer to learn and gain knowledge at a very fast pace, considering the amount of time such feature could have taken.

  • New patterns should also be reviewed with extra scrutiny as they influence how the codebase will evolve.
  • Durability of feature At S19, the majority of our projects focus on innovation, quick iterations, and prototyping quick ideas — all of this without specially requiring the need to scale.
  • At the same time we also build pieces of code which are meant to be used throughout our products, these modules are much more critical and require much more attention.
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It is essential to identify how durable a feature is meant to be, for that we need to be aware of the level of advancement of our project in its lifecycle. Is it going to be deployed to tens of thousands of customers, or will be be restricted to a selected pool of testers? A non-durable piece of code might be when we want to quickly test out a capability.

For instance there is a new peer-to-peer database we want to test, and it has to be shipped as part of our prototype. Our projects being highly de-risked, we should be able to deploy a potentially fatal piece of code. In this case downtime is not an issue, there will be no need for maintenance and the code will be rewritten once we have validated our hypothesis.

Most code changes will be about enhancing the set of features of the product: they are additional capabilities that function as coded by the programmer. The larger part of the work of a software engineer consist in delivering features. It might be in the context of a sprint: when delivering a feature we are bringing a project closer to its goal.

  1. In this case the review is more critical as it must take into consideration the objectives of the project/sprint.
  2. In order to have awareness of the context, it is useful to know about the goals of the project and to question how is the PR working towards this.
  3. Whether it is a for particular HTTP service, or for a library specific to a repository, we will often have to work on key reusable components.

These require particular attention since they will dictate the way future code is written. In this case the reviewer should understand how those components will be used, what now becomes under scrutiny is the API of what was built rather than the code itself.

How do I update an existing pull request?

Updating your pull request branch –

  1. Under your repository name, click Pull requests,
  2. In the “Pull requests” list, click the pull request you’d like to update.
  3. In the merge section near the bottom of the page, you can:
    • Click Update branch to perform a traditional merge.
    • Click the update branch drop down menu, click Update with rebase, and then click Rebase branch to update by rebasing on the base branch.

How do I see all pull requests in DevOps?

List pull requests – You can list PRs by using the Azure DevOps project website, Visual Studio, or the Azure DevOps command line.

  • Browser
  • Visual Studio
  • Azure DevOps CLI
  1. To list PRs in a specific repository in a project, go to that project in the web portal and select Repos > Pull requests,
  2. Verify that you selected the correct repository.
  3. The default view shows your PRs under the Mine tab. Select Active to show all active PRs for the current repository. Select Completed or Abandoned to bring up lists of closed PRs. Select any PR in the list to go to that PR’s Overview page.
  4. You can list all of your PRs across different projects in your organization by choosing Pull requests in the My Work view.

Manage PRs you own or are assigned to with the Pull Requests tab in the Code page on the web. You can view all of your PRs in your organization, across all projects, by choosing My pull requests from the Projects page. To list pull requests from Visual Studio, in the Git menu, select > View Pull Requests, Visual Studio 2019 version 16.8 and later versions provides a Git version control experience while maintaining the Team Explorer Git user interface. To use Team Explorer, uncheck Tools > Options > Preview Features > New Git user experience from the menu bar. You can exercise Git features from either interface interchangeably. To access PRs from Visual Studio Team Explorer:

  1. Connect to your project from Visual Studio,
  2. Select View > Team Explorer to open Team Explorer. You can also press Ctrl + \, Ctrl + M,
  3. From Home, select Pull Requests to view lists of PRs opened by you or assigned to you.
  4. To view the PR list in the Azure DevOps web portal, select Actions and then select Open in browser,

To list active PRs in your project with their details, use az repos pr list, az repos pr list

What is pull request review vs code review?

How GitHub Pull Requests Fit the Development Process – How To Review A Pull Request The image above may help show where pull requests fit into a six-step development process:

  1. Create a Branch – This is the push. The actual branch you’re pushing depends on your team’s branching strategy. This should always be the master branch in GitHub Flow and Trunk Based Development – It could be different (Feature, Develop, Release) if you use Git Flow, One Flow or GitLab Flow.
  2. Add Commits – Commits are the files and changes to files that you make. Each commit should have a clear description of the reason for the commit. Each commit is a distinct change applied to your local branch first.
  3. Open a Pull Request – This is a formal request for your commit to be reviewed by another developer.
  4. Code Review – A developer agrees to perform a code review on your commit, which may be done formally or informally. If approved, your commit takes a step forward (to #5 or #6 depending on your team’s process). If not approved, you return to #2 with comments advising you of issues that need to be fixed.
  5. Deploy – If your commit passes the code review, most teams will deploy it for further, more complex testing in a simulated production environment. If the changes don’t pass tests, you return to #2 with feedback from the test.
  6. Merge – Finally, after your code is reviewed, approved, and passes all tests, your commit is merged with the master branch – which, in GitHub Flow and TBD should always be deployment-ready.
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How do I auto review a pull request in GitHub?

Configuring auto assignment –

  1. In the top right corner of GitHub.com, click your profile photo, then click Your organizations,
  2. Click the name of your organization.
  3. Under your organization name, click Teams,
  4. Click the name of the team.
  5. At the top of the team page, click Settings,
  6. In the left sidebar, click Code review,
  7. Select Enable auto assignment,
  8. Under “How many team members should be assigned to review?”, select the dropdown menu and choose a number of reviewers to be assigned to each pull request.
  9. Under “Routing algorithm”, use the dropdown menu and choose which algorithm you’d like to use. For more information, see ” Routing algorithms,”
  10. Optionally, to always skip certain members of the team, select Never assign certain team members, Then, select one or more team members you’d like to always skip.
  11. Optionally, to include members of child teams as potential reviewers when assigning requests, select Child team members,
  12. Optionally, to count any members whose review has already been requested against the total number of members to assign, select Count existing requests,
  13. Optionally, to remove the review request from the team when assigning team members, select Team review request,
  14. Click Save changes,

How many people should review pull request?

In my team, all of the PRs require approval by at least one other developer. Only exception is when the PR is from a junior dev; then it must be reviewed by at least one senior developer.

How long should a reviewer take to review paper?

How long does peer review take? – A question often asked by authors, but also important to editors, is how long does it take between submission and publication of an article. This is a hard question to answer, but often peer review is the lengthiest part of this process.

Journals usually ask reviewers to complete their reviews within 3-4 weeks. However, few journals have a mechanism to enforce the deadline, which is why it can be hard to predict how long the peer review process will take. It’s also worth bearing in mind that highly technical papers or papers from niche subject areas could take longer to review because it often takes editors more time to find appropriate reviewers.

However, there are things you can do as an editor to make peer review more effective and efficient. Focus your efforts on good time management and supplying high-quality reviews. Being aware of the following potential delays can help you limit their effects:

Difficulty in finding appropriate reviewers Delayed response from reviewers Unhelpful review reports – reviews that are a single sentence or paragraph are unhelpful to authors or editors. A normal review report should be two to three pages in length, sometimes longer. (Read,)

How do you respond to a pull request comment?

After you open a pull request in a repository, collaborators or team members can comment on the comparison of files between the two specified branches, or leave general comments on the project as a whole. You can comment on a pull request’s Conversation tab to leave general comments, questions, or props.

  • You can also suggest changes that the author of the pull request can apply directly from your comment.
  • You can also comment on specific files or sections of a file in a pull request’s Files changed tab in the form of individual line or file comments, or as part of a pull request review.
  • Adding line or file comments is a great way to discuss questions about implementation or provide feedback to the author.

For more information about pull request reviews, see ” About pull request reviews,” For more information on adding line or file comments to a pull request review, see ” Reviewing proposed changes in a pull request,” Note: If you reply to a pull request via email, your comment will be added on the Conversation tab and will not be part of a pull request review.

  • Pull request comments support the same formatting as regular comments on GitHub, such as @mentions, emoji, and references.
  • You can add reactions to comments in pull requests in the Files changed tab.
  1. Under your repository name, click Pull requests,
  2. In the list of pull requests, click the pull request where you’d like to leave line comments.
  3. On the pull request, click Files changed,
  4. Hover over the line of code where you’d like to add a comment, and click the blue comment icon. To add a comment on multiple lines, click and drag to select the range of lines, then click the blue comment icon.
  5. In the comment field, type your comment.
  6. Optionally, to suggest a specific change to the line or lines, click, then edit the text within the suggestion block.
  7. To comment directly on a file, to the right of the file, click and type your comment.
  8. When you’re done, click Add single comment,

Anyone watching the pull request or repository will receive a notification of your comment.

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How do I review a pull request in Azure DevOps?

Review changes – Pull requests let designated reviewers examine, discuss, and vote on proposed changes before those changes are applied to a target branch of a repo. Keep in mind that if development is carried out with the same files on different branches there may be a conflicting changes.

  1. In that case it is required to carefully analyze and resolve those conflicts.
  2. To do so, may require manually editing the file to correctly apply the changes from either source, target or both branches.
  3. Taking all changes from either source or target (which can be done by a single button click) may not be optimal and can result in loss of some required changes.

This can be done using ADO tools, or it will be more convenient to use development tools (such as Visual Studio). To learn more see Resolve merge conflicts, The following steps describe how reviewers of PRs in Azure Repos can navigate through a PR to understand the proposed changes:

  1. From your web browser, open the team project for your Azure DevOps organization. Choose Repo > Pull requests to list the PRs. A newly opened PR defaults to the Overview tab.
  2. The Overview tab of a PR shows the title, description, reviewers, linked worked items, history, status, and comments. Read the PR description to see the proposed changes. View the comments to understand the issues raised by other reviewers. Note Each file is estimated for a number of modifications and is marked with a “+” sign or a “rename, edit” label next to its name. When a file has more than 50-percent changes, it is considered renamed. This is the default threshold for git repositories that cannot be changed.
  3. Select the Files tab to review all content changes in the PR’s source branch. The initial view shows a summary view of all file changes. Choose the View button next to a file to view only that file’s changes. If the file was modified, the View button opens a diff view. If the file was added or deleted, the View button opens a content pane. Note For performance reasons, the summary view won’t show changes for a file that’s larger than 0.5 MB.
  4. In a diff view for a file, you can select either a Side-by-side or Inline diff layout. Tip For any single file that’s larger than 5 MB, the diff view shows truncated file content. For a diff view of the full content, download and review such files using a local diff tool. Use the left-hand file tree to view another file, or select the root of the file tree to see a summary view of all file changes.
  5. To review the changeset introduced by specific pushes to the source branch, select one or more changesets from the changes dropdown list. When you select one or more changesets, the diff view updates to show only the changes from the selected changesets. This feature is useful when changes have been pushed to the PR since your last review and you just want to see the new changes. The changes dropdown list names each changeset with the commit message from the final commit in each push operation. Tip Hold the Shift key when selecting multiple changesets from the changes dropdown list.
  6. Choose the Updates tab to view all pushed changesets to ensure you haven’t missed any source branch changes. The changesets are numbered and the most recent changeset appears at the top of the list. Each changeset shows the commits that were pushed in that push operation. A force-pushed changeset won’t overwrite the changeset history and will show up in the changeset list same as any other changeset.
  7. Choose the Commits tab to view the commit history of the source branch after it diverged from the target branch. The commit history in the Commits tab will be overwritten if the PR author force-pushes a different commit history, so the commits shown in the Commits tab might differ from the commits shown in the Updates tab.

To give a quick picture of PR status, the PR Overview tab summarizes checks, requirements, and branch policies that the PR is passing or failing. In some cases, the summary shows a snippet of the failure message from a status check’s log. The overview lists only failed policies, but you can see all the passed and failed policy checks by selecting View checks,

How do I auto review a pull request in github?

Configuring auto assignment –

  1. In the top right corner of GitHub.com, click your profile photo, then click Your organizations,
  2. Click the name of your organization.
  3. Under your organization name, click Teams,
  4. Click the name of the team.
  5. At the top of the team page, click Settings,
  6. In the left sidebar, click Code review,
  7. Select Enable auto assignment,
  8. Under “How many team members should be assigned to review?”, select the dropdown menu and choose a number of reviewers to be assigned to each pull request.
  9. Under “Routing algorithm”, use the dropdown menu and choose which algorithm you’d like to use. For more information, see ” Routing algorithms,”
  10. Optionally, to always skip certain members of the team, select Never assign certain team members, Then, select one or more team members you’d like to always skip.
  11. Optionally, to include members of child teams as potential reviewers when assigning requests, select Child team members,
  12. Optionally, to count any members whose review has already been requested against the total number of members to assign, select Count existing requests,
  13. Optionally, to remove the review request from the team when assigning team members, select Team review request,
  14. Click Save changes,