Precise code intelligence for Protobuf

[olafurpg]

Currently, Sourcegraph does not support precise code intelligence for Protobuf files. We have validated an approach to accomplish this in a way so that cross-language navigation between *.proto files and the generated Protobuf files works as well. This means that "Go to definition" from Go/Java programs will be able to jump to the original *.proto file instead of the generated programs. Likewise, "Find references" on Protobuf symbols will be able to show usages from Go/Java programs.

The approach we have validated works by post-processing the generated LSIF files from lsif-go and lsif-java. Currrently, post-processing LSIF is quite awkward so we're investigating solutions to improve that before shipping Protobuf support.

• Enable Protobuf support for lsif-go
• Protobuf support scip-java#363
• Enable Protobuf support for lsif-node

[github-actions]

Heads up @macraig - the "team/code-intelligence" label was applied to this issue.

[olafurpg]

The approach we have validated works by post-processing the generated LSIF files from lsif-go and lsif-java. Currrently, post-processing LSIF is quite awkward so we're investigating solutions to improve that before shipping Protobuf support.

Small update: the solution we came up with is RFC 519, which has been approved and we've already made good progress on implementing it. We have a tracking issue for RFC 519 here https://github.com/sourcegraph/sourcegraph/issues/27403

[github-actions]

Heads up @jjeffwarner - the "team/search-core" label was applied to this issue.

[github-actions]

Heads up @macraig - the "team/code-intelligence" label was applied to this issue.