[Q]How to build local version in order to investigate?

[interfan7]

I need the ability to build locally in order to debug and investigate a query which takes very long.

I'm not too familiar with Go and have zero experience with building it.
Preferably I want to build in Mac and the target shall be a Linux Ubuntu machine.
Are there instructions to start?

What to investigate?
I've a case of a query which doesn't complete even in 2 minutes, even though CPU usage and IO disks counters don't seem to reach the limits.
That query shall return almost 80K metrics (Whisper files).
I want to start by inserting my own log lines to track down and pin-point what takes so long, is it really about reading datapoints from Whisper files?

[deniszh]

1. Install make and golang on mac, e.g. with manual on https://go.dev/doc/install
2. cd to project directory and run

make clean && make

It will print you a build command, like

go build -mod vendor --ldflags '-X main.BuildVersion=v0.17.3-7-g1159' github.com/go-graphite/go-carbon

and produce go-carbon binary in current directory.

$ file go-carbon
go-carbon: Mach-O 64-bit executable arm64

3. Remove go-carbon binary and prepend go command above with flags to build linux binary (GOOS=linux GOARCH=amd64) instead:

GOOS=linux GOARCH=amd64 go build -mod vendor --ldflags '-X main.BuildVersion=v0.17.3-7-g1159' github.com/go-graphite/go-carbon

Now you have linux binary instead:

$ file go-carbon
go-carbon: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=... with debug_info, not stripped

[interfan7]

@deniszh
I think the explenation just couldn't be any better!! 👏🏻🙏🏻