How to build your go project in a sandboxed manner? about hydroxide HOT 4 CLOSED

Why can't I do something like git clone hydroxide ./somewhere; cd ./somewhere; go build;?

This is how you do it with Go 1.11. It should work if you clone outside GOPATH (which is always the case for PKGBUILD), try it.

from hydroxide.

This behaviour is only the case when GOPATH and GOROOT both are unset. If they are set, it behaves differently.

Hmm, I have GOPATH and GOROOT set and go build ./cmd/hydroxide works. Only works if I cloned outside GOPATH though.

Anyway, nice you've figured it out!

from hydroxide.

This is what I tried at first, but then it couldn't find the module that provides hydroxide itself.

Error was/is then:

can't load package: package github.com/emersion/hydroxide: unknown import path "github.com/emersion/hydroxide": cannot find module providing package github.com/emersion/hydroxide

... and I was trying to execute go build inside the repo's root folder (same folder wherein the go.mod file is located).

If I use go build, do I need to set some environment variables or special flags, so that go finds the go.mod file and knows that the repo I'm building is also known as the alias in the source code?

I also tried using the GO111MODULE=on flag, but that has no influence over this behaviour (somewhere somebody said it's only necessary outside GOPATH).

from hydroxide.

Okay, for future references (in case somebody has the same problem):

• go build will only check the local go.mod file if a build target is given, which means cd ./hydroxide; go build ./cmd/hydroxide is necessary. Paths to .go files won't work, and a build target is required. Otherwise the above message is displayed.
• This behaviour is only the case when GOPATH and GOROOT both are unset. If they are set, it behaves differently.

So all in all, the new PKGBUILD file for hydroxide-git looks super simple, like this (go version 1.11 and later):

pkgname=hydroxide-git
pkgver=r1.05d0806
pkgrel=1
pkgdesc="A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge"
arch=('x86_64')
makedepends=('git' 'go')
url="https://github.com/emersion/hydroxide"
license=('MIT')
source=('git+https://github.com/emersion/hydroxide')
md5sums=('SKIP')

pkgver() {
	cd "$srcdir/hydroxide"
	printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
}

build() {
	cd "$srcdir/hydroxide";
	go build "./cmd/hydroxide";
}

package() {
	mkdir -p "$pkgdir/usr/bin"
	install -p -m755 "$srcdir/hydroxide/hydroxide" "$pkgdir/usr/bin"
	install -Dm644 "$srcdir/hydroxide/LICENSE" "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
}

@emersion Sorry for the trouble, thanks for the help! Your comment led me on the right path.

from hydroxide.