yarn.config.cjs

// @ts-check

/** @type {import("@yarnpkg/types")} */
const { defineConfig } = require("@yarnpkg/types");

/**
 * @typedef {import("@yarnpkg/types").Yarn.Constraints.Context} Context
 */

/**
 * This rule will enforce that a workspace MUST depend on the same version of
 * a dependency as the one used by the other workspaces.
 *
 * @param {Context} context
 */
function enforceConsistentDependenciesAcrossTheProject({ Yarn }) {
    for (const dependency of Yarn.dependencies()) {
        if (dependency.type === `peerDependencies`) continue;

        for (const otherDependency of Yarn.dependencies({ ident: dependency.ident })) {
            if (otherDependency.type === `peerDependencies`) continue;

            dependency.update(otherDependency.range);
        }
    }
}

module.exports = defineConfig({
    async constraints(ctx) {
        enforceConsistentDependenciesAcrossTheProject(ctx);
    },
});