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Scenario-4

This docs trying to explain the behavior of Pack

This section explain test-4.

If you look into this test’s dependency-list.yaml file.

$ cat dependency-list.yaml

items:
- package: github.com/kubepack/kube-a
  branch: test-4
- package: github.com/kubepack/kube-b
  branch: test-4

Here, test-4 depends on two repositories.

1. branch test-4 of kube-a.
   
2. branch test-4 of kube-b.

Both repositories(kube-a and kube-b) depends on two different branch of kube-c. kube-a depends on branch test-1 of kube-c and kube-b depends on master branch of kube-c.

To clarify, see image.

Now, when run $ pack dep -f . --v=10 command, pack could not resolve dependencies. As, this dependencies contradict with each other. Give below error.

  $ pack dep -f . --v=10
  
  
  
  I0108 15:58:18.241539   16369 logs.go:19] No versions of github.com/kubepack/kube-a met constraints:
          master: Could not introduce github.com/kubepack/kube-a@master, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          dep-c: Could not introduce github.com/kubepack/kube-a@dep-c, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-1: Could not introduce github.com/kubepack/kube-a@test-1, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-10: Could not introduce github.com/kubepack/kube-a@test-10, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-2: Could not introduce github.com/kubepack/kube-a@test-2, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-3: Could not introduce github.com/kubepack/kube-a@test-3, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-4: Could not introduce github.com/kubepack/kube-a@test-4, as it has a dependency on github.com/kubepack/kube-c with constraint test-1, which has no overlap with existing constraint master from github.com/kubepack/kube-b@test-4
          test-6: Could not introduce github.com/kubepack/kube-a@test-6, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-7: Could not introduce github.com/kubepack/kube-a@test-7, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.
          test-8: Could not introduce github.com/kubepack/kube-a@test-8, as it is not allowed by constraint test-4 from project github.com/kubepack/pack/_testdata/test-4.

Next Steps

• Want to publish apps using Kubepack? Please visit here.
• Want to consume apps published using Kubepack? Please visit here.
• To learn about dependency-list.yaml file, please visit here.
• Learn more about pack cli from here.