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# general
s
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s
If you use Githhub Actions they have a matrix strategy that allows us to easily configure 
pulumi preview/up
on all projects in parallel. Other CI tools might have something similar.
m
How you solution this is dependent on what CI/CD tool you're using. In general you want to collect the projects, then operate across them, ideally in parallel where you can:
Copy code
find . type -d -maxdepth 1 | xargs -I % sh -c 'pushd % && pulumi stack || echo "no pulumi stack"'
+1 for job matrix strategy
b
Wow thx for the fancy script, and matrix strategy! I’ve never heard of it. Actually I’m using gitlab CI/CD and it seems like there’s also tools for parallel executions. On top of that, I may do 
git diff
and identify what projects have changed, and parallelize only those changed projects. Really grateful for your answers
m
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git diff --name-only HEAD HEAD~1 |grep "/" |awk -F "/" '{ print $1 }' |sort |uniq |grep -E "(project-1|project-2)"
"Get the difference between two git refs, grep for paths with directories, print the first directory, sort, unique, match a regex of project names"
So if you consider that's how you do your collection of projects, you can pipe that to xargs like above:
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git diff --name-only HEAD HEAD~1 |grep "/" |awk -F "/" '{ print $1 }' |sort |uniq |grep -E "(project-1|project-2)" | xargs -I % sh -c 'pushd % && pulumi stack || echo "no pulumi stack"'
s
gitlab has https://docs.gitlab.com/ee/ci/yaml/#ruleschanges which might allow you to trigger jobs only if certain files contain changes. Perhaps it also works for directories
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