backport/dist/src/lib/get-target-branches.js

A CLI tool that automates the process of backporting commits

import { isEmpty, isString } from 'lodash-es';
import { BackportError } from './backport-error.js';
import { getSourceBranchFromCommits } from './get-source-branch-from-commits.js';
import { promptForTargetBranches } from './prompts.js';
export async function getTargetBranches(options, commits) {
    // target branches already specified (in contrast to letting the user choose from a list)
    if (!isEmpty(options.targetBranches)) {
        return options.targetBranches;
    }
    // target branches from the first commit
    const suggestedTargetBranches = commits.at(0)?.suggestedTargetBranches ?? [];
    // require target branches to be specified when when in non-interactive mode
    if (!options.interactive) {
        if (isEmpty(suggestedTargetBranches)) {
            throw new BackportError({ code: 'no-branches-exception' });
        }
        return suggestedTargetBranches;
    }
    const sourceBranch = getSourceBranchFromCommits(commits);
    const targetBranchChoices = getTargetBranchChoices(options, suggestedTargetBranches, sourceBranch);
    // render prmompt for selecting target branches
    return promptForTargetBranches({
        targetBranchChoices,
        isMultipleChoice: options.multipleBranches,
    });
}
export function getTargetBranchChoices(options, suggestedTargetBranches, sourceBranch) {
    // exclude sourceBranch from targetBranchChoices
    const targetBranchesChoices = getTargetBranchChoicesAsObject(options.targetBranchChoices).filter((choice) => choice.name !== sourceBranch);
    if (isEmpty(targetBranchesChoices)) {
        throw new BackportError({
            code: 'config-error-exception',
            message: 'Missing target branch choices',
        });
    }
    if (!options.branchLabelMapping) {
        return targetBranchesChoices;
    }
    // select missing target branches (based on pull request labels)
    return targetBranchesChoices.map((choice) => {
        const isChecked = suggestedTargetBranches.includes(choice.name);
        return { ...choice, checked: isChecked };
    });
}
// `targetBranchChoices` can either be a string or an object.
// It must be transformed so it is always treated as an object troughout the application
function getTargetBranchChoicesAsObject(targetBranchChoices) {
    if (!targetBranchChoices) {
        return [];
    }
    return targetBranchChoices.map((choice) => {
        if (isString(choice)) {
            return {
                name: choice,
                value: choice,
                checked: false,
            };
        }
        return { ...choice, value: choice.name };
    });
}
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