chore: exclude otlp trace provider from slim builds (coder#16140)

ethanndickson · web-flow · commit a252d137242f · 2025-01-15T20:51:32.000+11:00
This adds a build flag to `exporter.go` in `coderd/tracing` that skips
compiling the file in slim builds. This file brings in some relatively
hefty dependencies that were growing the size of the slim binary a few
megabytes. All files that import `exporter.go` also aren't included in
slim builds, so this is safe.

We end up saving 5.4MB on the Linux slim binary.
diff --git a/coderd/tracing/exporter.go b/coderd/tracing/exporter.go
@@ -1,3 +1,5 @@
+//go:build !slim
+
 package tracing
 
 import (

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+//go:build !slim`
	`2`	`+`
`1`	`3`	`package tracing`
`2`	`4`
`3`	`5`	`import (`