gitGraph support parallel commit

[ppggff]

Description

Consider following diagram:

gitGraph
    commit
    commit
    branch develop
    checkout develop
    commit
    commit
    checkout main
    commit
    commit

gitGraph
    commit
    commit
    branch develop
    checkout develop
    commit
    commit
    checkout main
    commit
    commit

The last two commits in the main branch are committed after the two in the develop branch.
Is there a way to show them as parallel commits?

Such as:

May be add a option to the checkout command?

Steps to reproduce

as above

Screenshots

No response

Code Sample

No response

Setup

• Mermaid version:
• Browser and Version: [Chrome, Edge, Firefox]

Suggested Solutions

No response

Additional Context

No response

[sidharthv96]

I think that is intentional, as the commit order shows the temporal data. Most of the auto-generated graphs follow the same design. It is possible to draw it like this if we switch branches.

gitGraph
    commit
    commit
    branch develop
    checkout develop
    commit
    checkout main
    commit
    checkout develop
    commit
    checkout main
    commit

Adding a parameter to checkout is one option, but if someone needs the entire graph to have parallel commits, it might become cumbersome. We could also introduce a config option config.git.parallelCommits to apply the style to the complete graph.

The config option should be the first step, before we make any changes to the grammar.

[ppggff]

Thanks, my original user case for this parallel commit is to:

• describe the development of a series of events, as a time line
• there are multiple timelines because events may change under different situation

Since is a join of multiple timelines, I hope the event points in different timelines to be independent.

Maybe we could control the order between commit in different branch, such as: commit id "a" before/after "b".