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The only required and most important one is the -p or -gitify-url-pattern flag. Options of gitify-depsĪs seen in the example above gitify-deps can be called with some additional option flags. Running this will generate the following output: Gitified modulesĪfter converting every matching module into its respective git repository, it is now possible to cd into them and make changes which are tracked by git.īy doing modifications directly inside the node_modules directory, it is now possible to change the application’s dependencies while keeping the possibility to run the (integration) tests of the app. With gitify-dependencies it looks like this: So while this can be fixed manually, it’s already obvious that this approach is generating all kinds of unwanted side effects.

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This happens because of the npm install step. It states that suddenly gitify-dependencies-test-errors is installed as a child of the validations module again, although it was gone previously. With npm link one would probably do this:Īn interesting side effect of this approach can be seen when npm ls is called inside the application folder. So let’s imagine a situation where a change needs to be introduced to the errors and the validations module. Using npm dedupe on this will remove all the duplications and reduces the dependencies to the following: gitify-deps vs npm link Let’s imagine the following application and its dependencies: The result was gitify-dependencies, which is not only replacing the module directories, but also utilizes git-new-workdir to allow collaborative editing on the same repository across multiple working directories.

Since doing this manually for a longer time was a no-go, we looked into automating this process. Move the dependencies of that module back Move the dependencies of that module to somewhere elseĬheckout the right version of the repository Go to the module directory that needs to be changed

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Since the overall idea was about being able to modify the node modules used in an application while having full version control over the changes, we were thinking about replacing a node module with its respective repository.

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This happened to me (and my colleagues) so often when using npm link and running npm install inside the module’s code directory that we decided to search for a way that allows modification of the modules while staying inside the application. Suddenly the errors are no longer inheriting from the same module but are two entirely independent objects in memory and therefore the instanceof check is about to fail. In the error case it is furthermore checking if the error is of a specific error instance (which live in our errors module) and running different code depending on the result.Ī typical problem with this approach can be seen when an application that uses this code and the module that allows reading content entries are running a different installation of the errors module – even though they might use the same version.

The following code snippet is about reading an entry via a node module and about handling its success and error case. It is getting even worse if your code contains instanceof checks which makes it crucial to only ever have a single installation of a module. This is a good solution for smaller applications which only have small amount of modules, but it’s getting very frustrating when you have a lot of them, or if the module’s sub-modules are subject to change as well. Typically this is the time when you start cloning the module repository to some place and start doing the npm link dance, which allows you to inject npm modules - that are located somewhere else on your hard drive - into an application.

So, while moving isolated logic into its own module generates a lot of advantages, it also makes it more complex to change them in the scope of the entire application and to ensure that such changes are not breaking the application. In order to prevent unpredictable breakages and problems with not-so-semver version bumps, we typically also have an npm-shrinkwrap file in place that pinpoints a specific version for every module and its sub-modules in the application. Additionally, we have modules which bundle all kinds of validations or contain all kinds of error codes and are therefore used in almost every application. For example we have a library that is connecting our apps to a shared logging system, or to an exception tracker, or to new relic, or to… you get the idea. Also the same modules are used in various places. All of them are using various node modules that are either publicly available or hosted privately. At Contentful we have various JavaScript applications that are running in the browser or are powering the backend.

Gitify windows