// LAMMPS branches and releases
digraph releases {
    rankdir="LR";
    github [shape="box" label="Pull Requests\non GitHub" height=0.75];
    github -> develop [label="Merge commits"];
    {
        rank = "same";
        work [shape="none" label="Development branches:" fontname="bold"]
        develop [label="'develop' branch" height=0.75];
        maintenance [label="'maintenance' branch" height=0.75];
    };
    {
        rank = "same";
        upload [shape="none" label="Release branches:" fontname="bold"]
        release [label="'release' branch" height=0.75];
        stable [label="'stable' branch" height=0.75];
    };
    develop -> release [label="Feature release\n(every 4-8 weeks)"];
    release -> stable [label="Stable release\n(once per year)"];
    stable -> maintenance [label="Reset on stable release" style="setlinewidth(2)"];
    develop -> maintenance [label="Backports of bugfixes" style="dashed"];
    maintenance -> stable [label="Updates to stable release"];
    {
        rank = "same";
        tag [shape="none" label="Applied tags:" fontname="bold"];
        patchtag [shape="box" label="patch_<date>"];
        stabletag [shape="box" label="stable_<date>"];
        updatetag [shape="box" label="stable_<date>_update<num>"];
    };
    release -> patchtag [label="feature release" style="dotted"];
    stable -> stabletag [label="stable release" style="dotted"];
    stable -> updatetag [label="update release" style="dotted"];
}