Commit 7d2bd6b9 authored by Achilleas Pipinellis's avatar Achilleas Pipinellis

Merge branch '21857-refactor-merge-requests-documentation' into 'master'

Refactor merge requests documentation

## What does this MR do?

Add more information on merge requests.

## Moving docs to a new location?

See the guidelines: http://docs.gitlab.com/ce/development/doc_styleguide.html#changing-document-location

- [x] Make sure the old link is not removed and has its contents replaced with a link to the new location.
- [x] Make sure internal links pointing to the document in question are not broken.
- [x] Search and replace any links referring to old docs in GitLab Rails app, specifically under the `app/views/` directory.
- [x] If working on CE, submit an MR to EE with the changes as well.

---

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/21857

See merge request !6202
parents 553180e1 026d1acd
...@@ -11,4 +11,4 @@ ...@@ -11,4 +11,4 @@
%br %br
%span.descr %span.descr
Builds need to be configured to enable this feature. Builds need to be configured to enable this feature.
= link_to icon('question-circle'), help_page_path('workflow/merge_requests', anchor: 'only-allow-merge-requests-to-be-merged-if-the-build-succeeds') = link_to icon('question-circle'), help_page_path('user/project/merge_requests/merge_when_build_succeeds', anchor: 'only-allow-merge-requests-to-be-merged-if-the-build-succeeds')
...@@ -47,8 +47,9 @@ ...@@ -47,8 +47,9 @@
Note that pushing to GitLab requires write access to this repository. Note that pushing to GitLab requires write access to this repository.
%p %p
%strong Tip: %strong Tip:
You can also checkout merge requests locally by = succeed '.' do
%a{href: 'https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/workflow/merge_requests.md#checkout-merge-requests-locally', target: '_blank'} following these guidelines You can also checkout merge requests locally by
= link_to 'following these guidelines', help_page_path('user/project/merge_requests.md', anchor: "checkout-merge-requests-locally"), target: '_blank'
:javascript :javascript
$(function(){ $(function(){
......
...@@ -23,9 +23,9 @@ Create merge requests and review code. ...@@ -23,9 +23,9 @@ Create merge requests and review code.
- [Fork a project and contribute to it](../workflow/forking_workflow.md) - [Fork a project and contribute to it](../workflow/forking_workflow.md)
- [Create a new merge request](../gitlab-basics/add-merge-request.md) - [Create a new merge request](../gitlab-basics/add-merge-request.md)
- [Automatically close issues from merge requests](../customization/issue_closing.md) - [Automatically close issues from merge requests](../customization/issue_closing.md)
- [Automatically merge when your builds succeed](../workflow/merge_when_build_succeeds.md) - [Automatically merge when your builds succeed](../user/project/merge_requests/merge_when_build_succeeds.md)
- [Revert any commit](../workflow/revert_changes.md) - [Revert any commit](../user/project/merge_requests/revert_changes.md)
- [Cherry-pick any commit](../workflow/cherry_pick_changes.md) - [Cherry-pick any commit](../user/project/merge_requests/cherry_pick_changes.md)
## Test and Deploy ## Test and Deploy
......
# Merge Requests
Merge requests allow you to exchange changes you made to source code and
collaborate with other people on the same project.
## Authorization for merge requests
There are two main ways to have a merge request flow with GitLab:
1. Working with [protected branches][] in a single repository
1. Working with forks of an authoritative project
[Learn more about the authorization for merge requests.](merge_requests/authorization_for_merge_requests.md)
## Cherry-pick changes
Cherry-pick any commit in the UI by simply clicking the **Cherry-pick** button
in a merged merge requests or a commit.
[Learn more about cherry-picking changes.](merge_requests/cherry_pick_changes.md)
## Merge when build succeeds
When reviewing a merge request that looks ready to merge but still has one or
more CI builds running, you can set it to be merged automatically when all
builds succeed. This way, you don't have to wait for the builds to finish and
remember to merge the request manually.
[Learn more about merging when build succeeds.](merge_requests/merge_when_build_succeeds.md)
## Resolve discussion comments in merge requests reviews
Keep track of the progress during a code review with resolving comments.
Resolving comments prevents you from forgetting to address feedback and lets
you hide discussions that are no longer relevant.
[Read more about resolving discussion comments in merge requests reviews.](merge_requests/merge_request_discussion_resolution.md)
## Resolve conflicts
When a merge request has conflicts, GitLab may provide the option to resolve
those conflicts in the GitLab UI.
[Learn more about resolving merge conflicts in the UI.](merge_requests/resolve_conflicts.md)
## Revert changes
GitLab implements Git's powerful feature to revert any commit with introducing
a **Revert** button in merge requests and commit details.
[Learn more about reverting changes in the UI](merge_requests/revert_changes.md)
## Merge requests versions
Every time you push to a branch that is tied to a merge request, a new version
of merge request diff is created. When you visit a merge request that contains
more than one pushes, you can select and compare the versions of those merge
request diffs.
[Read more about the merge requests versions.](merge_requests/versions.md)
## Work In Progress merge requests
To prevent merge requests from accidentally being accepted before they're
completely ready, GitLab blocks the "Accept" button for merge requests that
have been marked as a **Work In Progress**.
[Learn more about settings a merge request as "Work In Progress".](merge_requests/work_in_progress_merge_requests.md)
## Ignore whitespace changes in Merge Request diff view
If you click the **Hide whitespace changes** button, you can see the diff
without whitespace changes (if there are any). This is also working when on a
specific commit page.
![MR diff](merge_requests/img/merge_request_diff.png)
>**Tip:**
You can append `?w=1` while on the diffs page of a merge request to ignore any
whitespace changes.
## Tips
Here are some tips that will help you be more efficient with merge requests in
the command line.
> **Note:**
This section might move in its own document in the future.
### Checkout merge requests locally
A merge request contains all the history from a repository, plus the additional
commits added to the branch associated with the merge request. Here's a few
tricks to checkout a merge request locally.
#### Checkout locally by adding a git alias
Add the following alias to your `~/.gitconfig`:
```
[alias]
mr = !sh -c 'git fetch $1 merge-requests/$2/head:mr-$1-$2 && git checkout mr-$1-$2' -
```
Now you can check out a particular merge request from any repository and any
remote. For example, to check out the merge request with ID 5 as shown in GitLab
from the `upstream` remote, do:
```
git mr upstream 5
```
This will fetch the merge request into a local `mr-upstream-5` branch and check
it out.
#### Checkout locally by modifying `.git/config` for a given repository
Locate the section for your GitLab remote in the `.git/config` file. It looks
like this:
```
[remote "origin"]
url = https://gitlab.com/gitlab-org/gitlab-ce.git
fetch = +refs/heads/*:refs/remotes/origin/*
```
You can open the file with:
```
git config -e
```
Now add the following line to the above section:
```
fetch = +refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*
```
In the end, it should look like this:
```
[remote "origin"]
url = https://gitlab.com/gitlab-org/gitlab-ce.git
fetch = +refs/heads/*:refs/remotes/origin/*
fetch = +refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*
```
Now you can fetch all the merge requests:
```
git fetch origin
...
From https://gitlab.com/gitlab-org/gitlab-ce.git
* [new ref] refs/merge-requests/1/head -> origin/merge-requests/1
* [new ref] refs/merge-requests/2/head -> origin/merge-requests/2
...
```
And to check out a particular merge request:
```
git checkout origin/merge-requests/1
```
[protected branches]: protected_branches.md
# Authorization for Merge requests
There are two main ways to have a merge request flow with GitLab:
1. Working with [protected branches] in a single repository.
1. Working with forks of an authoritative project.
## Protected branch flow
With the protected branch flow everybody works within the same GitLab project.
The project maintainers get Master access and the regular developers get
Developer access.
The maintainers mark the authoritative branches as 'Protected'.
The developers push feature branches to the project and create merge requests
to have their feature branches reviewed and merged into one of the protected
branches.
By default, only users with Master access can merge changes into a protected
branch.
**Advantages**
- Fewer projects means less clutter.
- Developers need to consider only one remote repository.
**Disadvantages**
- Manual setup of protected branch required for each new project
## Forking workflow
With the forking workflow the maintainers get Master access and the regular
developers get Reporter access to the authoritative repository, which prohibits
them from pushing any changes to it.
Developers create forks of the authoritative project and push their feature
branches to their own forks.
To get their changes into master they need to create a merge request across
forks.
**Advantages**
- In an appropriately configured GitLab group, new projects automatically get
the required access restrictions for regular developers: fewer manual steps
to configure authorization for new projects.
**Disadvantages**
- The project need to keep their forks up to date, which requires more advanced
Git skills (managing multiple remotes).
[protected branches]: ../protected_branches.md
# Cherry-pick changes
> [Introduced][ce-3514] in GitLab 8.7.
---
GitLab implements Git's powerful feature to [cherry-pick any commit][git-cherry-pick]
with introducing a **Cherry-pick** button in Merge Requests and commit details.
## Cherry-picking a Merge Request
After the Merge Request has been merged, a **Cherry-pick** button will be available
to cherry-pick the changes introduced by that Merge Request:
![Cherry-pick Merge Request](img/cherry_pick_changes_mr.png)
---
You can cherry-pick the changes directly into the selected branch or you can opt to
create a new Merge Request with the cherry-pick changes:
![Cherry-pick Merge Request modal](img/cherry_pick_changes_mr_modal.png)
## Cherry-picking a Commit
You can cherry-pick a Commit from the Commit details page:
![Cherry-pick commit](img/cherry_pick_changes_commit.png)
---
Similar to cherry-picking a Merge Request, you can opt to cherry-pick the changes
directly into the target branch or create a new Merge Request to cherry-pick the
changes:
![Cherry-pick commit modal](img/cherry_pick_changes_commit_modal.png)
---
Please note that when cherry-picking merge commits, the mainline will always be the
first parent. If you want to use a different mainline then you need to do that
from the command line.
Here is a quick example to cherry-pick a merge commit using the second parent as the
mainline:
```bash
git cherry-pick -m 2 7a39eb0
```
[ce-3514]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3514 "Cherry-pick button Merge Request"
[git-cherry-pick]: https://git-scm.com/docs/git-cherry-pick "Git cherry-pick documentation"
# Merge When Build Succeeds
When reviewing a merge request that looks ready to merge but still has one or
more CI builds running, you can set it to be merged automatically when all
builds succeed. This way, you don't have to wait for the builds to finish and
remember to merge the request manually.
![Enable](img/merge_when_build_succeeds_enable.png)
When you hit the "Merge When Build Succeeds" button, the status of the merge
request will be updated to represent the impending merge. If you cannot wait
for the build to succeed and want to merge immediately, this option is available
in the dropdown menu on the right of the main button.
Both team developers and the author of the merge request have the option to
cancel the automatic merge if they find a reason why it shouldn't be merged
after all.
![Status](img/merge_when_build_succeeds_status.png)
When the build succeeds, the merge request will automatically be merged. When
the build fails, the author gets a chance to retry any failed builds, or to
push new commits to fix the failure.
When the builds are retried and succeed on the second try, the merge request
will automatically be merged after all. When the merge request is updated with
new commits, the automatic merge is automatically canceled to allow the new
changes to be reviewed.
## Only allow merge requests to be merged if the build succeeds
> **Note:**
You need to have builds configured to enable this feature.
You can prevent merge requests from being merged if their build did not succeed.
Navigate to your project's settings page, select the
**Only allow merge requests to be merged if the build succeeds** check box and
hit **Save** for the changes to take effect.
![Only allow merge if build succeeds settings](img/merge_when_build_succeeds_only_if_succeeds_settings.png)
From now on, every time the build fails you will not be able to merge the merge
request from the UI, until you make the build pass.
![Only allow merge if build succeeds msg](img/merge_when_build_succeeds_only_if_succeeds_msg.png)
# Reverting changes
> [Introduced][ce-1990] in GitLab 8.5.
---
GitLab implements Git's powerful feature to [revert any commit][git-revert]
with introducing a **Revert** button in Merge Requests and commit details.
## Reverting a Merge Request
_**Note:** The **Revert** button will only be available for Merge Requests
created since GitLab 8.5. However, you can still revert a Merge Request
by reverting the merge commit from the list of Commits page._
After the Merge Request has been merged, a **Revert** button will be available
to revert the changes introduced by that Merge Request:
![Revert Merge Request](img/revert_changes_mr.png)
---
You can revert the changes directly into the selected branch or you can opt to
create a new Merge Request with the revert changes:
![Revert Merge Request modal](img/revert_changes_mr_modal.png)
---
After the Merge Request has been reverted, the **Revert** button will not be
available anymore.
## Reverting a Commit
You can revert a Commit from the Commit details page:
![Revert commit](img/revert_changes_commit.png)
---
Similar to reverting a Merge Request, you can opt to revert the changes
directly into the target branch or create a new Merge Request to revert the
changes:
![Revert commit modal](img/revert_changes_commit_modal.png)
---
After the Commit has been reverted, the **Revert** button will not be available
anymore.
Please note that when reverting merge commits, the mainline will always be the
first parent. If you want to use a different mainline then you need to do that
from the command line.
Here is a quick example to revert a merge commit using the second parent as the
mainline:
```bash
git revert -m 2 7a39eb0
```
[ce-1990]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1990 "Revert button Merge Request"
[git-revert]: https://git-scm.com/docs/git-revert "Git revert documentation"
# Merge requests versions
> Will be [introduced][ce-5467] in GitLab 8.12.
Every time you push to a branch that is tied to a merge request, a new version
of merge request diff is created. When you visit a merge request that contains
more than one pushes, you can select and compare the versions of those merge
request diffs.
By default, the latest version of changes is shown. However, you
can select an older one from version dropdown.
![Merge Request Versions](img/versions.png)
---
>**Note:**
Merge request versions are based on push not on commit. So, if you pushed 5
commits in a single push, it will be a single option in the dropdown. If you
pushed 5 times, that will count for 5 options.
[ce-5467]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5467
# "Work In Progress" Merge Requests
To prevent merge requests from accidentally being accepted before they're
completely ready, GitLab blocks the "Accept" button for merge requests that
have been marked a **Work In Progress**.
![Blocked Accept Button](img/wip_blocked_accept_button.png)
To mark a merge request a Work In Progress, simply start its title with `[WIP]`
or `WIP:`.
![Mark as WIP](img/wip_mark_as_wip.png)
To allow a Work In Progress merge request to be accepted again when it's ready,
simply remove the `WIP` prefix.
![Unark as WIP](img/wip_unmark_as_wip.png)
# Workflow # Workflow
- [Authorization for merge requests](authorization_for_merge_requests.md)
- [Change your time zone](timezone.md) - [Change your time zone](timezone.md)
- [Description templates](../user/project/description_templates.md) - [Description templates](../user/project/description_templates.md)
- [Feature branch workflow](workflow.md) - [Feature branch workflow](workflow.md)
...@@ -21,11 +20,15 @@ ...@@ -21,11 +20,15 @@
- [Web Editor](../user/project/repository/web_editor.md) - [Web Editor](../user/project/repository/web_editor.md)
- [Releases](releases.md) - [Releases](releases.md)
- [Milestones](milestones.md) - [Milestones](milestones.md)
- [Merge Requests](merge_requests.md) - [Merge Requests](../user/project/merge_requests.md)
- [Revert changes](revert_changes.md) - [Authorization for merge requests](../user/project/merge_requests/authorization_for_merge_requests.md)
- [Cherry-pick changes](cherry_pick_changes.md) - [Cherry-pick changes](../user/project/merge_requests/cherry_pick_changes.md)
- ["Work In Progress" Merge Requests](wip_merge_requests.md) - [Merge when build succeeds](../user/project/merge_requests/merge_when_build_succeeds.md)
- [Merge When Build Succeeds](merge_when_build_succeeds.md) - [Resolve discussion comments in merge requests reviews](../user/project/merge_requests/merge_request_discussion_resolution.md)
- [Resolve merge conflicts in the UI](../user/project/merge_requests/resolve_conflicts.md)
- [Revert changes in the UI](../user/project/merge_requests/revert_changes.md)
- [Merge requests versions](../user/project/merge_requests/versions.md)
- ["Work In Progress" merge requests](../user/project/merge_requests/work_in_progress_merge_requests.md)
- [Manage large binaries with Git LFS](lfs/manage_large_binaries_with_git_lfs.md) - [Manage large binaries with Git LFS](lfs/manage_large_binaries_with_git_lfs.md)
- [Importing from SVN, GitHub, BitBucket, etc](importing/README.md) - [Importing from SVN, GitHub, BitBucket, etc](importing/README.md)
- [Todos](todos.md) - [Todos](todos.md)
# Authorization for Merge requests This document was moved to [user/project/merge_requests/authorization_for_merge_requests](../user/project/merge_requests/authorization_for_merge_requests.md)
There are two main ways to have a merge request flow with GitLab: working with protected branches in a single repository, or working with forks of an authoritative project.
## Protected branch flow
With the protected branch flow everybody works within the same GitLab project.
The project maintainers get Master access and the regular developers get Developer access.
The maintainers mark the authoritative branches as 'Protected'.
The developers push feature branches to the project and create merge requests to have their feature branches reviewed and merged into one of the protected branches.
Only users with Master access can merge changes into a protected branch.
### Advantages
- fewer projects means less clutter
- developers need to consider only one remote repository
### Disadvantages
- manual setup of protected branch required for each new project
## Forking workflow
With the forking workflow the maintainers get Master access and the regular developers get Reporter access to the authoritative repository, which prohibits them from pushing any changes to it.
Developers create forks of the authoritative project and push their feature branches to their own forks.
To get their changes into master they need to create a merge request across forks.
### Advantages
- in an appropriately configured GitLab group, new projects automatically get the required access restrictions for regular developers: fewer manual steps to configure authorization for new projects
### Disadvantages
- the project need to keep their forks up to date, which requires more advanced Git skills (managing multiple remotes)
# Cherry-pick changes This document was moved to [user/project/merge_requests/cherry_pick_changes](../user/project/merge_requests/cherry_pick_changes.md).
> [Introduced][ce-3514] in GitLab 8.7.
---
GitLab implements Git's powerful feature to [cherry-pick any commit][git-cherry-pick]
with introducing a **Cherry-pick** button in Merge Requests and commit details.
## Cherry-picking a Merge Request
After the Merge Request has been merged, a **Cherry-pick** button will be available
to cherry-pick the changes introduced by that Merge Request:
![Cherry-pick Merge Request](img/cherry_pick_changes_mr.png)
---
You can cherry-pick the changes directly into the selected branch or you can opt to
create a new Merge Request with the cherry-pick changes:
![Cherry-pick Merge Request modal](img/cherry_pick_changes_mr_modal.png)
## Cherry-picking a Commit
You can cherry-pick a Commit from the Commit details page:
![Cherry-pick commit](img/cherry_pick_changes_commit.png)
---
Similar to cherry-picking a Merge Request, you can opt to cherry-pick the changes
directly into the target branch or create a new Merge Request to cherry-pick the
changes:
![Cherry-pick commit modal](img/cherry_pick_changes_commit_modal.png)
---
Please note that when cherry-picking merge commits, the mainline will always be the
first parent. If you want to use a different mainline then you need to do that
from the command line.
Here is a quick example to cherry-pick a merge commit using the second parent as the
mainline:
```bash
git cherry-pick -m 2 7a39eb0
```
[ce-3514]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3514 "Cherry-pick button Merge Request"
[git-cherry-pick]: https://git-scm.com/docs/git-cherry-pick "Git cherry-pick documentation"
# Merge Requests This document was moved to [user/project/merge_requests](../user/project/merge_requests.md).
Merge requests allow you to exchange changes you made to source code
## Only allow merge requests to be merged if the build succeeds
You can prevent merge requests from being merged if their build did not succeed
in the project settings page.
![only_allow_merge_if_build_succeeds](merge_requests/only_allow_merge_if_build_succeeds.png)
Navigate to project settings page and select the `Only allow merge requests to be merged if the build succeeds` check box.
Please note that you need to have builds configured to enable this feature.
## Checkout merge requests locally
### By adding a git alias
Add the following alias to your `~/.gitconfig`:
```
[alias]
mr = !sh -c 'git fetch $1 merge-requests/$2/head:mr-$1-$2 && git checkout mr-$1-$2' -
```
Now you can check out a particular merge request from any repository and any remote, e.g. to check out a merge request number 5 as shown in GitLab from the `upstream` remote, do:
```
$ git mr upstream 5
```
This will fetch the merge request into a local `mr-upstream-5` branch and check it out.
### By modifying `.git/config` for a given repository
Locate the section for your GitLab remote in the `.git/config` file. It looks like this:
```
[remote "origin"]
url = https://gitlab.com/gitlab-org/gitlab-ce.git
fetch = +refs/heads/*:refs/remotes/origin/*
```
Now add the line `fetch = +refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*` to this section.
It should look like this:
```
[remote "origin"]
url = https://gitlab.com/gitlab-org/gitlab-ce.git
fetch = +refs/heads/*:refs/remotes/origin/*
fetch = +refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*
```
Now you can fetch all the merge requests:
```
$ git fetch origin
From https://gitlab.com/gitlab-org/gitlab-ce.git
* [new ref] refs/merge-requests/1/head -> origin/merge-requests/1
* [new ref] refs/merge-requests/2/head -> origin/merge-requests/2
...
```
To check out a particular merge request:
```
$ git checkout origin/merge-requests/1
```
## Ignore whitespace changes in Merge Request diff view
![MR diff](merge_requests/merge_request_diff.png)
If you click the "Hide whitespace changes" button, you can see the diff without whitespace changes.
![MR diff without whitespace](merge_requests/merge_request_diff_without_whitespace.png)
It is also working on commits compare view.
![Commit Compare](merge_requests/commit_compare.png)
## Merge Requests versions
Every time you push to merge request branch, a new version of merge request diff
is created. When you visit the merge request page you see latest version of changes.
However you can select an older one from version dropdown
![Merge Request Versions](merge_requests/versions.png)
# Merge When Build Succeeds This document was moved to [user/project/merge_requests/merge_when_build_succeeds](../user/project/merge_requests/merge_when_build_succeeds.md).
When reviewing a merge request that looks ready to merge but still has one or more CI builds running, you can set it to be merged automatically when all builds succeed. This way, you don't have to wait for the builds to finish and remember to merge the request manually.
![Enable](merge_when_build_succeeds/enable.png)
When you hit the "Merge When Build Succeeds" button, the status of the merge request will be updated to represent the impending merge. If you cannot wait for the build to succeed and want to merge immediately, this option is available in the dropdown menu on the right of the main button.
Both team developers and the author of the merge request have the option to cancel the automatic merge if they find a reason why it shouldn't be merged after all.
![Status](merge_when_build_succeeds/status.png)
When the build succeeds, the merge request will automatically be merged. When the build fails, the author gets a chance to retry any failed builds, or to push new commits to fix the failure.
When the builds are retried and succeed on the second try, the merge request will automatically be merged after all. When the merge request is updated with new commits, the automatic merge is automatically canceled to allow the new changes to be reviewed.
# Reverting changes This document was moved to [user/project/merge_requests/revert_changes](../user/project/merge_requests/revert_changes.md).
> [Introduced][ce-1990] in GitLab 8.5.
---
GitLab implements Git's powerful feature to [revert any commit][git-revert]
with introducing a **Revert** button in Merge Requests and commit details.
## Reverting a Merge Request
_**Note:** The **Revert** button will only be available for Merge Requests
created since GitLab 8.5. However, you can still revert a Merge Request
by reverting the merge commit from the list of Commits page._
After the Merge Request has been merged, a **Revert** button will be available
to revert the changes introduced by that Merge Request:
![Revert Merge Request](img/revert_changes_mr.png)
---
You can revert the changes directly into the selected branch or you can opt to
create a new Merge Request with the revert changes:
![Revert Merge Request modal](img/revert_changes_mr_modal.png)
---
After the Merge Request has been reverted, the **Revert** button will not be
available anymore.
## Reverting a Commit
You can revert a Commit from the Commit details page:
![Revert commit](img/revert_changes_commit.png)
---
Similar to reverting a Merge Request, you can opt to revert the changes
directly into the target branch or create a new Merge Request to revert the
changes:
![Revert commit modal](img/revert_changes_commit_modal.png)
---
After the Commit has been reverted, the **Revert** button will not be available
anymore.
Please note that when reverting merge commits, the mainline will always be the
first parent. If you want to use a different mainline then you need to do that
from the command line.
Here is a quick example to revert a merge commit using the second parent as the
mainline:
```bash
git revert -m 2 7a39eb0
```
[ce-1990]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1990 "Revert button Merge Request"
[git-revert]: https://git-scm.com/docs/git-revert "Git revert documentation"
# "Work In Progress" Merge Requests This document was moved to [user/project/merge_requests/work_in_progress_merge_requests](../user/project/merge_requests/work_in_progress_merge_requests.md).
To prevent merge requests from accidentally being accepted before they're completely ready, GitLab blocks the "Accept" button for merge requests that have been marked a **Work In Progress**.
![Blocked Accept Button](wip_merge_requests/blocked_accept_button.png)
To mark a merge request a Work In Progress, simply start its title with `[WIP]` or `WIP:`.
![Mark as WIP](wip_merge_requests/mark_as_wip.png)
To allow a Work In Progress merge request to be accepted again when it's ready, simply remove the `WIP` prefix.
![Unark as WIP](wip_merge_requests/unmark_as_wip.png)
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