8000 support for GOPACKAGESDRIVER env variable? · Issue #2755 · microsoft/vscode-go · GitHub
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support for GOPACKAGESDRIVER env variable? #2755

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jmhodges opened this issue Sep 17, 2019 · 5 comments
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support for GOPACKAGESDRIVER env variable? #2755

jmhodges opened this issue Sep 17, 2019 · 5 comments

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@jmhodges
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gopls, by way of golang.org/x/tools/go/packages, supports using the environment variable GOPACKAGESDRIVER to allow for build systems other than the go tooling (such as bazel) to provide the look ups for gopls.

However, there doesn't seem to be a way to set that env var as a workspace setting. I'm trying to help out with bazel's attempt at supporting gopls (documented at bazel-contrib/rules_go#512 and https://github.com/bazelbuild/rules_go/wiki/Editor-and-tool-integration) which relies on this.

(While there's no godoc.org documentation of it, GOPACKAGESDRIVER is described in the go/packages code base in external.go)

Is there some way to set the GOPACKAGESDRIVER environment variable in my settings.json?
@jmhodges
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(I also opened golang/go#34341 to get that env var documented in a more public way)

@jmhodges
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Oh, I think I was reading outdated docs on the wiki? Is using go.toolsEnvVars the way to do this?

@jmhodges
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Or maybe there's an undocumented gopls.env that I've seen mentioned in the vscode channel in the gophers slack?

@stamblerre
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You can set the GOPACKAGESDRIVER used by gopls in 2 different ways, either:

"go.toolsEnvVars": {
    "GOPACKAGESDRIVER": "mygopackagesdriver"
}

or

"gopls": {
    "env": {
        "GOPACKAGESDRIVER": "mygopackagesdriver"
    }
}

The difference is that if you set "go.toolsEnvVars", the same driver will be used by any other tools that use go/packages that are used by VSCode. The configuration in the "gopls" settings just tells gopls to use that driver. It's also needed for editors that do not have a setting akin to "go.toolsEnvVars".

@ramya-rao-a
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I agree with @stamblerre

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@jmhodges @stamblerre @ramya-rao-a
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