With multiple repositories, contributors can head directly to the specific repository for the project they want to contribute to. Open source projects must make it as easy as possible for contributors to become involved. If this action triggers a new release, then all libraries hosted in the repository will be newly released with the version number from the tag, even though many of those libraries may not have had any change. When we tag the monorepo, all code within is assigned the new tag. Unmodified Libraries May Be Newly Versioned For instance, everyday actions such as executing git status or searching in the codebase with a regex may take many seconds or even minutes longer than they would with multiple repos. To contribute to any library hosted within, anybody would require a download of the whole repository.ĭealing with a vast codebase implies a poor use of space on our hard drives and slower interactions with it. When the monorepo contains all the code for a company, it can be huge, containing gigabytes of data. The more tests to run, the more time it takes to run them, slowing down how fast we can iterate on our code. In addition, a library will need to run the tests for all other libraries too. This outcome could frustrate the members of the fastest teams, creating conditions for them to want to leave the company. What’s more, the project may well start advancing only at the speed of the slowest team in the company. If these libraries depend on other teams, who are busy working on some other task and are not able (or willing) to adapt their code to avoid the breaking changes and have the tests pass, the development of the new feature may stall. When the code for a library contains breaking changes, which make the tests for dependent libraries fail, the code must also be fixed before merging the changes. Using a single repository for all our code has several drawbacks. Since they’ll share the same repository, they will most likely share the same programming and management methodologies and use the same development tools. Teams Share Development CultureĮven though not impossible, with a monorepo approach, it becomes challenging to inspire unique subcultures among different teams. As a result, the likelihood of doing a change in some libraries has minimized adverse effects on other libraries. With the monorepo, we can set up all tests for all libraries to run whenever any single library is modified. More Difficult To Break Adjacent Functionality If you’re hosting them via multiple repositories, managing all the different pull requests to keep them synchronized with each other can prove to be a challenge.Ī monorepo makes it easy to perform all modifications to all code for all libraries and submit it under a single pull request. When creating an application-wide refactoring of the code, multiple libraries will be affected. With a monorepo, though, both locating code problems and collaborating to troubleshoot become simpler to achieve. On top of this, we would need to figure out which repository to use to create the issue and then invite and cross-tag members of other teams to help resolve the problem. With multiple repositories, it may be challenging to find the piece of code where the problem happens. It simplifies code management since we can use a single issue tracker to watch all issues throughout the application’s life cycle.įor instance, these characteristics are valuable when an issue spans two (or more) child libraries with the bug existing on the dependent library. Having a single repository gives visibility of all the code to all developers. Since there is a single location containing all code and documentation, you can streamline the initial setup. In that case, the initial setup will be complex, and more often than not, the documentation will not be complete, requiring these new team members to reach out to colleagues for help.Ī monorepo simplifies matters. Suppose the project is scattered across many repositories, each having its installation instructions and tooling required. When new staff members start working for a company, they need to download the code and install the required tools to begin working on their tasks. Hosting the whole codebase on a single repository provides the following benefits.
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