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Work From a Commit ID in Git

Work From a Commit ID in Git

When you Git_repositories_in_Domino, you have the option to specify which state of the repository you want checked out by default in your runs and workspaces. You can specify a branch, tag, commit ID, or custom ref.

Commit IDs are unique SHA-1 hashes that are created whenever a new commit is recorded. If you specify a commit ID when adding a repository, Domino will always pull the state of the repository specified by that commit in a detached HEAD state. This represents a fixed point in the repository’s history, and will not evolve over time like a branch.

image:/images/Screen_Shot_2018-05-22_at_4.55.14_PM.png

Domino cannot automatically push to repositories it has pulled in this way. If you want to push changes to such a repository, you can use the workspace command line to manually commit and push to a new branch. See Git_repositories_in_Domino to learn more about interacting with Git in workspaces.

Example

In this example, a repository called domino-manual has been added to our project with a specified commit ID. When we start our workspace, it gets pulled to /repos/domino-manual with the target commit checked out in a detached HEAD state. We can verify this in our workspace command line by running git status.

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Suppose during the course of our workspace session we make a change to the repository. It will remain in the detached HEAD state, but Git will continue to track changes.

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We can add and commit those changes as normal.

image:/images/Screen_Shot_2018-05-22_at_3.25.19_PM.png

However, if we try to push from the detached HEAD state, we will encounter a fatal error. Git must have a branch to push to.

image:/images/Screen_Shot_2018-05-22_at_3.27.06_PM.png

The solution is to create a local branch from our detached HEAD, check it out, and push to remote with git push -u origin branch-name>.

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