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bootstrap: unify snapshot builder and embedder entry points
- Run the embedder entry point directly through
runEmbedderEntryPoint(), instead of going through another
JS -> C++ trip through the function returned by
getEmbedderEntryFunction()
- For --build-snapshot, read the snapshot script code directly in C++
and pass it to SnapshotBuilder::Generate(), this makes the entry point
more explicit instead of hiding it in JS land, and also makes it
possible to invoke SnapshotBuilder::Generate() internally to create
a custom snapshot.
- Previously we used process.execPath for the embedder to create
__filename and __dirname in the snapshot builder script while using
process.argv[1] for --build-snapshot (where it's always set) which
results in inconsistencies. We now require the embedder to also set
args[1] when creating the Environment if they intend to run snapshot
scripts with a context that contains __filename and __dirname, which
would be derived from args[1]. If they prefer not to include
build-time paths in the snapshot, we now provide
node::GetAnonymousMainPath() as an alternative.
PR-URL: #48242
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
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