Prepend terminal PATH when go.goroot is set

[segevfiner]

Is your feature request related to a problem? Please describe.
When using go.goroot to set an alternate Go version for a specific workspace, the terminal still uses the default PATH which leads the go command in the terminal to point to the default Go installation.

Describe the solution you'd like
Set the PATH in the terminal. (In a similar way to what is done when using Go: Choose Go Environment?)

Of course, this needs to be careful not to mangle the PATH, it should only really prepend the version and that's it, not set the entire variable.

Describe alternatives you've considered
Having to keep setting it manually...

[hyangah]

@segevfiner I thought I fixed this long ago - unfortunately, it still needs the window reload. Or do you mean that the PATH should be mutated automatically when go.goroot is changed after the extension is activated?

[segevfiner]

I have workspace where I set go.goroot in the workspace settings, it applies to stuff run by the vscode-go extension itself, but not in the integrated terminal of VS Code, after VS Code reload or otherwise. At least that's what I'm seeing.

VS Code 1.48.0 on macOS 1.14.6
vscode-go 1.16.1

[hyangah]

Thanks. Strange that go.goroot is the one I use to choose different versions of go and this code that applies the PATH mutation should run before the go version statusbar is activated.
The go status bar has the right version of go, right?

Given that you are using macOS, I wonder if any of the conditions here (

vscode-go/src/goEnvironmentStatus.ts

Lines 304 to 313 in 18eaf7e

	} else if (!terminalCreationListener) { // process.platform === 'darwin'
	// We don't use EnvironmentVariableCollection on mac
	// because this gets confusing for users. Instead we send the
	// shell command to change the PATH env var,
	// following the suggestion to workaround described in
	// https://github.com/microsoft/vscode/issues/99878#issuecomment-642808852
	const terminalShellArgs = <string[]>(
	vscode.workspace.getConfiguration('terminal.integrated.shellArgs').get('osx') || []);
	// User explicitly chose to run the login shell. So, don't mess with their config.
	if (!terminalShellArgs.includes('-l') && !terminalShellArgs.includes('--login')) {

) are true and prevent from applying the PATH mutation.

[segevfiner]

@hyangah https://github.com/microsoft/vscode/blob/33d79af3d8258f3a9d03c67252b3c433164b4146/src/vs/workbench/contrib/terminal/common/terminalConfiguration.ts#L59

[hyangah]

Thanks @segevfiner
Indeed I've been using with

    "terminal.integrated.shellArgs.osx": [
    ],

Maybe I misinterpreted the comment here microsoft/vscode#99878 (comment)
and we should've sent the export command if '-l' is set (i.e. true for macos by default :-()

[gopherbot]

Change https://golang.org/cl/251161 mentions this issue: src/goEnvironmentStatus: fix PATH mutation logic in osx

[burdiyan]

This fix completely broke my workflow with multiple Go versions for different workspaces.

I'm using Nix package manager and nix-shell + direnv for settings specific to projects. So I have one Go version installed globally with Nix and another one set with nix-shell for my project. It was working fine (because by default VS Code by default adds '-l' to shell arguments) for integrated terminal and PATH mutation was not invoked.

But now it mangles my PATH and overrides any Go version I've set in PATH with direnv by prepending my global Go version to my PATH.

I don't know why this is needed at all, why can't the extension just use whatever Go version is in the PATH without mutating it?

[segevfiner]

Maybe it shouldn't do this when go.goroot is unset...

[burdiyan]

@segevfiner would be lovely!

[gopherbot]

Change https://golang.org/cl/256938 mentions this issue: src/goInstallTools.ts: mutate PATH only when necessary