Gitlab Md File

A new branch will be created in your fork and a new merge request will be started. Contribute to GitLab Sign in / Register. Toggle navigation. README.md 258 Bytes Edit Web IDE. Replace README.md × Attach a file by drag & drop or click to upload. For GitLab.com, GitLab CE and GitLab EE text areas, the markdown engine is currently CommonMarker. Here you can find the markdown style guide for them. This guide has been made to make it easier for everyone to use kramdown features and save a lot of time writing content for about.GitLab.com, including handbook pages, website pages, blog posts.

Repository Mirroring is a way to mirror repositories from external sources.It can be used to mirror all branches, tags, and commits that you havein your repository.

Your mirror at GitLab will be updated automatically. You canalso manually trigger an update at most once every 5 minutes.

Overview

Repository mirroring is very useful when, for some reason, you must use aproject from another source.

There are two kinds of repository mirroring features supported by GitLab:push and pull. The push method mirrors the repository in GitLabto another location, whereas the pull method mirrors an external repositoryin one in GitLab.

Once the mirror repository is updated, all new branches,tags, and commits will be visible in the project's activity feed.Users with at least developer access to the project can also force animmediate update with the click of a button. This button will not be available ifthe mirror is already being updated or 5 minutes still haven't passed since its last update.

A few things/limitations to consider:

  • The repository must be accessible over http://, https://, ssh:// or git://.
  • If your HTTP repository is not publicly accessible, add authenticationinformation to the URL, like: https://[email protected]/group/project.git.In some cases, you might need to use a personal access token instead of apassword, e.g., you want to mirror to GitHub and have 2FA enabled.
  • The import will time out after 15 minutes. For repositories that take longeruse a clone/push combination.
  • The Git LFS objects will not be synced. You'll need to push/pull themmanually.

Use-cases

  • You migrated to GitLab but still need to keep you project in another source.In that case, you can simply set it up to mirror to GitLab (pull) and all theessential history of commits, tags and branches will be available in yourGitLab instance.
  • You have old projects in another source that you don't use actively anymore,but don't want to remove for archiving purposes. In that case, you can createa push mirror so that your active GitLab repository can push its changes to theold location.

Pulling from a remote repository

Introduced in GitLab Enterprise Edition 8.2.

You can set up a repository to automatically have its branches, tags, and commitsupdated from an upstream repository. This is useful when a repository you'reinterested in is located on a different server, and you want to be able tobrowse its content and its activity using the familiar GitLab interface.

When creating a new project, you can enable repository mirroring when you chooseto import the repository from 'Any repo by URL'. Enter the full URL of the Gitrepository to pull from and click on the Mirror repository checkbox.

Github Md File Viewer

For an existing project, you can set up mirror pulling by visiting your project'sSettings ➔ Repository and searching for the 'Pull from a remote repository'section. Check the 'Mirror repository' box and hit Save changes at the bottom.You have a few options to choose from one being the user who will be the authorof all events in the activity feed that are the result of an update. This userneeds to have at least master access to the project. Another option iswhether you want to trigger builds for mirror updates.

Since the repository on GitLab functions as a mirror of the upstream repository,you are advised not to push commits directly to the repository on GitLab.Instead, any commits should be pushed to the upstream repository, and will endup in the GitLab repository automatically within a certain period of timeor when a forced update is initiated.

If you do manually update a branch in the GitLab repository, the branch willbecome diverged from upstream, and GitLab will no longer automatically updatethis branch to prevent any changes from being lost.

Trigger update using API

Introduced in GitLab Enterprise Edition 10.3.

Pull mirroring uses polling to detect new branches and commits added upstream,often many minutes afterwards. If you notify GitLab by API, updateswill be pulled immediately.

Read the Pull Mirror Trigger API docs.

Pull only protected branches

Introduced in GitLab Enterprise Edition 10.3.

You can choose to only pull the protected branches from your remote repository to GitLab.

To use this option go to your project's repository settings page under pull mirror.

Overwrite diverged branches

[Introduced][ee-4559] in GitLab Enterprise Edition 10.6.

You can choose to always update your local branch with the remote version even if your local version has diverged from the remote.

To use this option go to your project's repository settings page under pull mirror.

Hard failure

Introduced in GitLab Enterprise Edition 10.2.

Once a mirror gets retried 14 times in a row, it will get marked as hard failed,this will become visible in either the project main dashboard or in the pull mirror settings page.

When a project is hard failed, it will no longer get picked up for mirroring.A user can resume the project mirroring again by either forcing an updateor by changing the import URL in repository settings.

SSH authentication

Introduced in GitLab Starter 9.5

If you're mirroring over SSH (i.e., an ssh:// URL), you can authenticate usingpassword-based authentication, just as over HTTPS, but you can also use publickey authentication. This is often more secure than password authentication,especially when the source repository supports Deploy Keys.

To get started, navigate to Settings ➔ Repository ➔ Pull from a remote repository,enable mirroring (if not already enabled) and enter an ssh:// URL.

NOTE: SCP-style URLs, e.g., [email protected]:group/project.git, are notsupported at this time.

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Entering the URL adds two features to the page - Fingerprints andSSH public key authentication:

SSH authentication is mutual. You have to prove to the server that you'reallowed to access the repository, but the server also has to prove to you thatit's who it claims to be. You provide your credentials as a password or publickey. The server that the source repository resides on provides its credentialsas a 'host key', the fingerprint of which needs to be verified manually.

Press the Detect host keys button. GitLab will fetch the host keys from theserver, and display the fingerprints to you:

You now need to verify that the fingerprints are those you expect. GitLab.comand other code hosting sites publish their fingerprints in the open for youto check:

Other providers will vary. If you're running on-premises GitLab, or otherwisehave access to the source server, you can securely gather the key fingerprints:

(You may need to exclude -E md5 for some older versions of SSH).

If you're an SSH expert and already have a known_hosts file you'd like to useunaltered, then you can skip these steps. Just press the 'Show advanced' buttonand paste in the file contents:

Once you've carefully verified that all the fingerprints match your trustedsource, you can press Save changes. This will record the host keys, along withthe person who verified them (you!) and the date:

When pulling changes from the source repository, GitLab will now check that atleast one of the stored host keys matches before connecting. This can preventmalicious code from being injected into your mirror, or your password beingstolen!

To use SSH public key authentication, you'll also need to choose that optionfrom the authentication methods dropdown. GitLab will generate a 4096-bit RSAkey and display the public component of that key to you:

You then need to add the public SSH key to the source repository configuration.If the source is hosted on GitLab, you should add it as a Deploy Key.Other sources may require you to add the key to your user's authorized_keysfile - just paste the entire ssh-rsa AAA.... [email protected] block into the file onits own line and save it.

Once the public key is set up on the source repository, press Save changes and yourmirror will begin working.

If you need to change the key at any time, you can press the Regenerate keybutton to do so. You'll have to update the source repository with the new keyto keep the mirror running.

How it works

Once you activate the pull mirroring feature, the mirror will be inserted intoa queue. A scheduler will start every minute and schedule a fixed amount ofmirrors for update, based on the configured maximum capacity.

If the mirror successfully updates it will be enqueued once again with a smallbackoff period.

If the mirror fails (eg: branch diverged from upstream), the project's backoffperiod will be penalized each time it fails up to a maximum amount of time.

Pushing to a remote repository

Introduced inGitLab Enterprise Edition 8.7.

For an existing project, you can set up push mirror from your project'sSettings ➔ Repository and searching for the 'Push to a remote repository'section. Check the 'Remote mirror repository' box and fill in the Git URL ofthe repository to push to. Click Save changes for the changes to takeeffect.

Similarly to pull mirroring, when push mirroring is enabled, you are advisednot to push commits directly to the mirrored repository to prevent the mirrordiverging. All changes will end up in the mirrored repository whenever commitsare pushed to GitLab, or when a forced update isinitiated.

Pushes into GitLab are automatically pushed to the remote mirror at least onceevery 5 minutes after they are received or once every minute if push onlyprotected branches is enabled.

In case of a diverged branch, you will see an error indicated at the Mirrorrepository settings.

Push only protected branches

Introduced in GitLab Enterprise Edition 10.3.

You can choose to only push your protected branches from GitLab to your remote repository.

To use this option go to your project's repository settings page under push mirror.

Setting up a mirror from GitLab to GitHub

To set up a mirror from GitLab to GitHub, you need to follow these steps:

  1. Create a GitHub personal access token with the 'public_repo' box checked:

  2. Fill in the 'Git repository URL' with the personal access token replacing the password https://GitHubUsername:[email protected]/group/project.git:

  3. Save

  4. And either wait or trigger the 'Update Now' button:

Forcing an update

While mirrors are scheduled to update automatically, you can always force an update (either push orpull) by using the Update now button which is exposed in various places:

  • in the commits page
  • in the branches page
  • in the tags page
  • in the Mirror repository settings page

Bidirectional mirroring

Warning: There is no bidirectional support without conflicts. If youconfigure a repository to pull and push to a second remote, there is noguarantee that it will update correctly on both remotes. If you configurea repository for bidirectional mirroring, you should consider when conflictsoccur who and how they will be resolved.

Rewriting any mirrored commit on either remote will cause conflicts andmirroring to fail. This can be prevented by only pulling protected branches and only pushing protected branches. You should protect the branches you wish tomirror on both remotes to prevent conflicts caused by rewriting history.

Bidirectional mirroring also creates a race condition where commits to the samebranch in close proximity will cause conflicts. The race condition can bemitigated by reducing the mirroring delay by using a Push event webhook totrigger an immediate pull to GitLab. Push mirroring from GitLab is rate limitedto once per minute when only push mirroring protected branches.

It may be possible to implement a locking mechanism using the server-sidepre-receive hook to prevent the race condition. Read about configuringcustom Git hooks on the GitLab server.

Mirroring with Perforce via GitFusion

Warning: Bidirectional mirroring should not be used as a permanentconfiguration. There is no bidirectional mirroring without conflicts.Refer to Migrating from Perforce Helix for alternative migrationapproaches.

GitFusion provides a Git interface to Perforce which can be used by GitLab tobidirectionally mirror projects with GitLab. This may be useful in somesituations when migrating from Perforce to GitLab where overlapping Perforceworkspaces cannot be migrated simultaneously to GitLab.

If using mirroring with Perforce you should only mirror protected branches.Perforce will reject any pushes that rewrite history. It is recommended thatonly the fewest number of branches are mirrored due to the performancelimitations of GitFusion.

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Gitlab md file extension
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Gitlab Md File Extension

  • Selected Reading

In this chapter, we will discuss about how to add a file to a project in the GitLab. We can add file in two ways −

  • Using Command Line Interface
  • Using Web Interface

Creating a file using Command Line Interface

Gitlab Print Md File

Step 1 − To create a file by using command line interface, type the below command in your project directory −

Step 2 − Now go to your project directory and you will see the created file −

Github Md File Format

Creating a file using Web Interface

Gitlab

Step 1 − You can create a new file, by clicking on the '+' button which is at the right side of the branch selector in the dashboard −

Step 2 − Enter the file name, add some content in the editor section and click on the Commit changes button to create the file.

Step 3 − Now you will get a successful message after creating the file as shown below −