Add support to cherry-pick any commit

Issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/12785
Merge Request: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3514

7 files changed, 54 insertions, 0 deletions

diff --git a/doc/intro/README.md b/doc/intro/README.md
index fecbbe6317b..ab298d3808e 100644
--- a/doc/intro/README.md
+++ b/doc/intro/README.md
@@ -25,6 +25,7 @@ Create merge requests and review code.
 - [Automatically close issues from merge requests](../customization/issue_closing.md)
 - [Automatically merge when your builds succeed](../workflow/merge_when_build_succeeds.md)
 - [Revert any commit](../workflow/revert_changes.md)
+- [Cherry-pick any commit](../workflow/cherry_pick_changes.md)
 
 ## Test and Deploy
 
diff --git a/doc/workflow/README.md b/doc/workflow/README.md
index 25893f948ea..9efe41308dc 100644
--- a/doc/workflow/README.md
+++ b/doc/workflow/README.md
@@ -20,6 +20,7 @@
 - [Milestones](milestones.md)
 - [Merge Requests](merge_requests.md)
 - [Revert changes](revert_changes.md)
+- [Cherry-pick changes](cherry_pick_changes.md)
 - ["Work In Progress" Merge Requests](wip_merge_requests.md)
 - [Merge When Build Succeeds](merge_when_build_succeeds.md)
 - [Manage large binaries with Git LFS](lfs/manage_large_binaries_with_git_lfs.md)
diff --git a/doc/workflow/cherry_pick_changes.md b/doc/workflow/cherry_pick_changes.md
new file mode 100644
index 00000000000..b0ca0879643
--- /dev/null
+++ b/doc/workflow/cherry_pick_changes.md
@@ -0,0 +1,52 @@
+# Cherry-pick changes
+
+_**Note:** This feature was [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"
diff --git a/doc/workflow/img/cherry_pick_changes_commit.png b/doc/workflow/img/cherry_pick_changes_commit.png
new file mode 100644
index 00000000000..ae91d2cae53
--- /dev/null
+++ b/doc/workflow/img/cherry_pick_changes_commit.png
diff --git a/doc/workflow/img/cherry_pick_changes_commit_modal.png b/doc/workflow/img/cherry_pick_changes_commit_modal.png
new file mode 100644
index 00000000000..f502f87677a
--- /dev/null
+++ b/doc/workflow/img/cherry_pick_changes_commit_modal.png
diff --git a/doc/workflow/img/cherry_pick_changes_mr.png b/doc/workflow/img/cherry_pick_changes_mr.png
new file mode 100644
index 00000000000..59c610e620b
--- /dev/null
+++ b/doc/workflow/img/cherry_pick_changes_mr.png
diff --git a/doc/workflow/img/cherry_pick_changes_mr_modal.png b/doc/workflow/img/cherry_pick_changes_mr_modal.png
new file mode 100644
index 00000000000..96a80f4726d
--- /dev/null
+++ b/doc/workflow/img/cherry_pick_changes_mr_modal.png