Swift Package 管理器依赖镜像

Question

I have a project and:

• the company I'm working with is self-hosting their git
• the CI can communicate only with company's network

That being said, if I want to install any dependency, I have to ask their dev ops to mirror the target repository and only then I can use it.

The problem arises when I want to implement Crashlytics which has a lot of dependencies. When I import the Firebase, it's fetched from the mirrored repo correctly, but it's dependencies are still being fetched from the original URLs (which makes perfect sense).

The question is - How do I tell Swift Package Manager to swap each URL with mirrors ? I have all the dependencies mirrored. I only need to tell SPM to use it.

I have found this proposal which was implemented in Swift 5, but when I go to root of my project and run:

$ swift package config set-mirror --package-url <original URL> --mirror-url <mirror URL>

I get this error:

error: root manifest not found

Any ideas how to do this correctly? Thank you

EDIT:

As Florian correctly pointed out, the proposal works from the package's repository, not my projects: So:

1. I do clone mirrored repo in my project's root
2. I run set of commands to set mirror url for each dependency:

swift package config set-mirror \
    --original-url https://github.com/google/GoogleAppMeasurement.git \
    --mirror-url <company's url>/mirrors/githubcom-google-GoogleAppMeasurement

3. I go back to projects root and run:

xcodebuild -resolvePackageDependencies -project MyProject.xcodeproj -scheme MyAppScheme

But it's still fetching from original urls, not the mirrors!

Answer 1

Having an Xcode project makes this task basically impossible. Xcode's integration with SPM works fine for most things, but is not (yet?) at par with what SPM can do in pure SPM packages.

The problem is, that swift package config is alway only local to the package and does not have any effect on projects / packages that depend on the package. And with Xcode currently having no counterpart to swift package config , it's not possible to do this at the moment.

What you could do, however, is to clone all your dependencies locally and then reference them as local packages from Xcode (simply dragging the package folder onto Xcode will do so). Xcode will be smart enough to take the dependencies from the local local checkout (or at least it was smart enough last time I tried this).

Let's hope for a future Xcode version with full SPM support!

Answer 2

I second what Florian said - there seems not to be a straightforward way to set mirrors for SPM in Xcode projects yet.

Not sure if it's a bug, but following this proposal results in fetching dependencies from the original URL, not mirrored even though it's correctly updated inside the .swiftpm/config .

There is, however, a workaround for this. I will continue using Crashlytics as an example. You have to clone the Firebase repository inside the root of your project (don't forget to add it in your .gitignore ) and edit its Package.swift file - replace the URL of each dependency with your mirror. Copy this file somewhere in your project and commit it (CI will replace the cloned package file with the edited one). Finally, run a command to resolve packages and you will see the mirrors gets fetched. Not very sophisticated, but works.

Script for the CI can look like this:

cd <path to root of the project>
git clone <mirrored repo>
rm ./firebase-mirror-repo/Package.swift
cp ./Resources/Package.swift ./firebase-mirror-repo/
xcodebuild -resolvePackageDependencies

I have decided not to use this hack, nor any dependency manager in this case. I have all the dependencies as .xcframework s and store them in artifactory. CI fetches all the dependencies including Crashlytics from artifactory in each run. Frameworks are in .gitignore and I never commit them.