Recreating merge-request in another repository

scratch-clone-merge-request.js

// WHY?
// https://forum.gitlab.com/t/how-to-move-merge-request-between-projects/52914

// OLD PROJECT:
let r = await fetch("https://gitlab.xxx.com/api/v4/projects/269/merge_requests?labels=Moving")
let mr = await r.json()

console.log(mr)
// ADD NEW PROJECTS AS ADDITIONAL REMOTES:
// git remote add mongodb https://gitlab.xxx.com/xxx/xxx-data/xxx-storage/xxx-mongodb.git
// git remote add postgresql https://xxx.intelie.com/xxx/xxx-data/xxx-storage/xxx-postgresql.git
// git remote add sql https://gitlab.xxx.com/xxx/xxx-data/xxx-storage/xxx-sql.git

let projects = {
    "sql": 1254,
    "mongodb": 1252,
    "postgresql": 1253
}

// MANUAL STEP: a human should classify the MR and the destination projects
let destination = {
    "sql": [1062, 865],
    "mongodb": [1036, 748, 632],
    "postgresql": [1030, 1003, 988]
}

// RECREATING THE BRANCHES IN THE EACH NEW REMOTES ACCORDILYING
Object.keys(destination)
    .flatMap(project =>
        destination[project].map(iid => {
            let branch = mr.find(item => item.iid === iid).source_branch
            return "git push " + project + " 'refs/remotes/origin/" + branch + ":refs/heads/" + branch + "'"
        })
    )

let newMergeRequests = {}
mr.forEach(async original => {
    // LISTING ALL NOTES
    // GET /projects/:id/merge_requests/:merge_request_iid/notes?per_page=100
    let response = await fetch("https://gitlab.xxx.com/api/v4/projects/" + original.project_id + "/merge_requests/" + original.iid + "/notes")
    let allNotes = await response.json()
    let userNotes = allNotes.filter(note => note.system === false)

    // TODO: HOW TO CREATE A DIFF NOTE
    // if note.type === 'DiffNote' .. 
    // POST https://gitlab.intelie.com/amadeu.barbosa/live/notes?target_id=9029&target_type=merge_request
    // {
    //    _discussion_id: "",
    //    line_type: "old",
    //    merge_request_diff_head_sha: "9999c8d5ac3cbb3620592df14c84cb8cbabafb21",
    //    note: {
    //        commit_id: null,
    //        line_code: "587d266bb27a4dc3022bbed44dfa19849df3044c_145_145",
    //        note: "aaaaaaaaaa",
    //        noteable_id: 9029,
    //        noteable_type: "MergeRequest",
    //        position: "{\"base_sha\":\"6cab25c38045891fbf4b0ad84744a6252b478063\",\"start_sha\":\"6cab25c38045891fbf4b0ad84744a6252b478063\",\"head_sha\":\"9999c8d5ac3cbb3620592df14c84cb8cbabafb21\",\"old_path\":\".gitlab-ci.yml\",\"new_path\":\".gitlab-ci.yml\",\"position_type\":\"text\",\"old_line\":null,\"new_line\":145,\"line_range\":{\"start\":{\"line_code\":\"587d266bb27a4dc3022bbed44dfa19849df3044c_145_145\",\"type\":\"new\",\"old_line\":null,\"new_line\":145},\"end\":{\"line_code\":\"587d266bb27a4dc3022bbed44dfa19849df3044c_145_145\",\"type\":\"new\",\"old_line\":null,\"new_line\":145}}}",
    //        type: "DiffNote"
    //    },
    //    note_project_id: "",
    //    return_discussion: true,
    //    target_id: 9029,
    //    target_type: "merge_request",
    //    view: "inline"
    // }

    // TODO: HOW TO REPLY IN A THREAD
    // https://gitlab.intelie.com/amadeu.barbosa/live/notes?target_id=9029&target_type=merge_request
    // {
    //    in_reply_to_discussion_id: "3269e5ce4185ccd21dff552d26522cdc6ae535bf",
    //    note: {
    //        note: "bbbbbb"
    //    },
    //    target_type: "merge_request"
    // }

    let targetProject = Object.keys(destination)
        .filter(newProjName => destination[newProjName].includes(original.iid))
    if (targetProject.length > 1) {
        console.error("Failure a merge-request should not be related more than once", targetProject, original.iid)
    } else {
        let targetProjName = targetProject[0]
        newMergeRequests[targetProjName] = newMergeRequests[targetProjName] || []
        newMergeRequests[targetProjName].push({
            payload: {
                title: original.title,
                description: original.description,
                labels: original.labels,
                assignee_id: original.assignee?.id,
                reviewer_ids: original.reviewers?.map(rev => rev.id),
                squash: false,
                source_branch: original.source_branch,
                target_branch: original.target_branch,
                remove_source_branch: true
            },
            notes: userNotes,
            original_iid: original.iid,
            original_project_id: original.project_id,
            original_author: original.author
        })
    }
})