gitserver: improve tracing for handleExec (!4039) · Merge requests · Administrator / sourcegraph · GitLab

Administrator requested to merge gitserver-tracing into master May 15, 2019

Created by: ijt

extend the span for handleExec to the whole func
add trace for quickRevParseHead
extract execGitCommand and give it a trace of its own

Test plan: Run a search and visit /-/debug for gitserver to see the traces.