tree 8b7e298f273a45bf6ced7e2135ba28ebb68823f3
parent c57c0212ebf44b7896477177c8e35be79ff3a586
author Michael Matloob <matloob@golang.org> 1593553912 -0400
committer Michael Matloob <matloob@golang.org> 1597936877 +0000

cmd/go: do context propagation for tracing downloads

This change does context propagation (and only context propagation)
necessary to add context to modfetch.Download and pkg.LoadImport.
This was done by adding context to their callers, and then
adding context to all call-sites, and then repeating adding
context to callers of those enclosing functions and their
callers until none were left. In some cases the call graph expansion
was pruned by using context.TODOs.

The next CL will add a span to Download. I kept it out of this
change to avoid making it any larger (and harder to review)
than it needs to be.

Updates #38714

Change-Id: I7a03416e04a14ca71636d96f2c1bda2c4c30d348
Reviewed-on: https://go-review.googlesource.com/c/go/+/249021
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>