Skaffold: Add configurable ignore-list for watched dependencies

[r2d4]

Even though we can calculate all the dependencies, users might not want to (or be able to) watch all dependencies for a large project. We should figure out how we want to expose a ignore functionality to the user

https://github.com/GoogleCloudPlatform/skaffold/pull/15#discussion_r165719716

[r2d4]

ref #50

[l2silver]

And similarly, perhaps a regex include option configurable for each artifact? I've got a node monorepo that requires me to bundle files before running docker build.

[faraazkhan]

+1 This feature is kind of important, but also there may be some default optimizations that can go within skaffold, for example right now, simply adding a file to the git index with git add triggers a rebuild in skaffold, which is wasteful to say the least. Can we ignore some directories like .git by default or maybe honor existing ignore files like .dockerignore

[hach-que]

We use .dockerignore to ignore some development symlinks, and skaffold tries to walk them and fails on this line https://github.com/GoogleContainerTools/skaffold/blob/master/vendor/github.com/karrick/godirwalk/walk.go#L197, even though it builds just fine in Docker. It would be great if Skaffold could honor existing .dockerignore files.

[dgageot]

@hach-que Skaffold does try to honor existing .dockerignore files. Do you have an example of a failure?

[nkubala]

hey everyone, this issue is one of our oldest still around! i'm not totally convinced based on the evidence here that this is a feature we need in skaffold, and our team likely won't be prioritizing it anytime soon. i'm going to mark it for closure now - that said, if anyone has evidence for why we need to build this in skaffold or examples of where we're falling short, please drop them in here!

[maxtuzz]

Would love to see this feature. I have to delegate the build step to a custom script and every time the target/ directory is regenerated for maven projects it'll just get stuck in an infinite loop of building and deploying.

EDIT: This feature does exist as a build configuration. Posting here as Google takes us to these issues rather than the relevant docs:

dependencies:
          paths: [src]
          ignore: [target]