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fix: don't delete functions generated by other build plugins #2511
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            fix: don't delete functions generated by other build plugins #2511
                    pieh
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Description
We are currently clearing out entire
.netlify/functions-internaland.netlify/edge-functionsto get rid of potentially stale functions generated by previous builds. We however also potentially delete functions generated by other build plugins / integrations making impossible to use other integrations with Next Runtime.The change in this PR make it so we don't clear entire directories - instead we look for metadata files and find functions generated by
@netlify/plugin-nextjsand selectively delete those while keeping other functions untouchedEDIT:
this is considered pretty risky change so this being draft tries to reflect that it shouldn't be merged without much considerations (probably better to figure out better alternative). #2536 reduced the reach of the problem for now, but it isn't completely solved yet
Tests
A test case added with fixture simulating stale next runtime functions as well as simulating other build plugin / integration
Relevant links (GitHub issues, etc.) or a picture of cute animal
Fixes https://linear.app/netlify/issue/FRP-742/nextjs-runtime-deletes-functions-and-edge-functions-generated-by-other