Add GOCACHE in build.sh

[leventov]

Fixes #108

[techknowlogick]

🤔 hmmm... CI fail is kinda related, I wonder if it is due to base not being rebuilt.

[leventov]

@techknowlogick what do you mean by "base not being rebuilt"?

[techknowlogick]

@leventov the base docker image, however I've toggled it on to build fresh for this PR and it still fails in same way, so that sadly wasn't the issue. Now I am rather confused as in theory that directory should be writeable, I wonder if it fails because it is created inside the docker container with root permissions and perhaps outside the docker container the CI runs with non-root user

[bearsh]

the problems seems to be that the .xgo-cache folder in the home directory is created from inside the container as root.

$ ls -la . | grep .xgo
drwxr-xr-x   2 root   root        4096 Jun 15  2020 .xgo-cache

so it's not writable by this code:

if err := os.MkdirAll(gocache, 0641); err != nil {
	log.Fatalf("Failed to create gocache dir: %v.", err)
}

I think .xgo-cache should be owned by the user and ideally also I files inside it. so xgo should create that folder initially (and error if it's already present with wrong ownership with a message how to fix it). hopefully it's working when the
build script calls chown -R --reference /gochache /gocache/* at the end like it does already on the /build folder.

[bearsh]

is this 0641 intended?

[leventov]

It was an attempt to shrink down from 644 suggested above: #116 (comment)

[zeripath]

This is supposed to be a directory 0644 = rw-r--r-- which means you can't actually traverse the directory

This should be 0755 or 0750

[zeripath]

I'm gonna push up an update

[leventov]

@bearsh please feel free to recreate or fix this PR if you understand how to fix it.

[zeripath]

I think I've fixed this now.

[zeripath]

Refixed conflicts

[zeripath]

I'll rebase this once #194 is in.

[zeripath]

Conflicts re-resolved