x/tools/gopls: Code completion in gopls is not working, unable to find the packages to import

[tyanxie]

What did you do?

I have enabled gopls in Neovim through configuring lspconfig. When I am working in a new project and type http, gopls does not provide code completion suggestions for net/http. And this issue is not limited to the http module, it affects all modules.

I have noticed that when I manually add import net/http to the import block, the code completion starts to work properly, and it also begins to suggest other modules correctly.

I guess that maybe gopls only indexes the modules in the import block and does not index the standard library or the modules listed in go.mod by default. I believe this is not the expected behavior. I think indexing the standard library and the modules in go.mod should be considered an expected behavior.

What did you expect to see?

Neovim should provide suggestions for packages that have not yet been imported, such as directly using http in a new project as I mentioned earlier.

What did you see instead?

Neovim does not suggest packages that have not yet been imported.

Build info

{
        "GoVersion": "go1.23.5",
        "Path": "golang.org/x/tools/gopls",
        "Main": {
                "Path": "golang.org/x/tools/gopls",
                "Version": "v0.17.1",
                "Sum": "h1:Mt/DSfnnSe3dyf6MH/dZZ0iww+viHNhAFc4rEYDiOAw=",
                "Replace": null
        },
        "Deps": [
                {
                        "Path": "github.com/BurntSushi/toml",
                        "Version": "v1.4.1-0.20240526193622-a339e1f7089c",
                        "Sum": "h1:pxW6RcqyfI9/kWtOwnv/G+AzdKuy2ZrqINhenH4HyNs=",
                        "Replace": null
                },
                {
                        "Path": "github.com/google/go-cmp",
                        "Version": "v0.6.0",
                        "Sum": "h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/exp/typeparams",
                        "Version": "v0.0.0-20231108232855-2478ac86f678",
                        "Sum": "h1:1P7xPZEwZMoBoz0Yze5Nx2/4pxj6nw9ZqHWXqP0iRgQ=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/mod",
                        "Version": "v0.22.0",
                        "Sum": "h1:D4nJWe9zXqHOmWqj4VMOJhvzj7bEZg4wEYa759z1pH4=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/sync",
                        "Version": "v0.9.0",
                        "Sum": "h1:fEo0HyrW1GIgZdpbhCRO0PkJajUS5H9IFUztCgEo2jQ=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/telemetry",
                        "Version": "v0.0.0-20241106142447-58a1122356f5",
                        "Sum": "h1:TCDqnvbBsFapViksHcHySl/sW4+rTGNIAoJJesHRuMM=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/text",
                        "Version": "v0.20.0",
                        "Sum": "h1:gK/Kv2otX8gz+wn7Rmb3vT96ZwuoxnQlY+HlJVj7Qug=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/tools",
                        "Version": "v0.27.1-0.20241219162658-575221bfbda3",
                        "Sum": "h1:kgwdasJRsdDWYgWcEgMF424DiXwwXHSb3V8xVTi//i8=",
                        "Replace": null
                },
                {
                        "Path": "golang.org/x/vuln",
                        "Version": "v1.0.4",
                        "Sum": "h1:SP0mPeg2PmGCu03V+61EcQiOjmpri2XijexKdzv8Z1I=",
                        "Replace": null
                },
                {
                        "Path": "honnef.co/go/tools",
                        "Version": "v0.5.1",
                        "Sum": "h1:4bH5o3b5ZULQ4UrBmP+63W9r7qIkqJClEA9ko5YKx+I=",
                        "Replace": null
                },
                {
                        "Path": "mvdan.cc/gofumpt",
                        "Version": "v0.7.0",
                        "Sum": "h1:bg91ttqXmi9y2xawvkuMXyvAA/1ZGJqYAEGjXuP0JXU=",
                        "Replace": null
                },
                {
                        "Path": "mvdan.cc/xurls/v2",
                        "Version": "v2.5.0",
                        "Sum": "h1:lyBNOm8Wo71UknhUs4QTFUNNMyxy2JEIaKKo0RWOh+8=",
                        "Replace": null
                }
        ],
        "Settings": [
                {
                        "Key": "-buildmode",
                        "Value": "exe"
                },
                {
                        "Key": "-compiler",
                        "Value": "gc"
                },
                {
                        "Key": "CGO_ENABLED",
                        "Value": "1"
                },
                {
                        "Key": "CGO_CFLAGS",
                        "Value": ""
                },
                {
                        "Key": "CGO_CPPFLAGS",
                        "Value": ""
                },
                {
                        "Key": "CGO_CXXFLAGS",
                        "Value": ""
                },
                {
                        "Key": "CGO_LDFLAGS",
                        "Value": ""
                },
                {
                        "Key": "GOARCH",
                        "Value": "arm64"
                },
                {
                        "Key": "GOOS",
                        "Value": "darwin"
                },
                {
                        "Key": "GOARM64",
                        "Value": "v8.0"
                }
        ],
        "Version": "v0.17.1"
}

[gabyhelp]

Related Issues

• x/tools/gopls: Completion not working in modules with "vendor" as their name #54071 (closed)
• x/tools/gopls: auto-completion not listing values from unimported packages #57939 (closed)
• x/tools/gopls: "method textDocument/completion did not reply" #37859 (closed)
• x/tools/gopls: not working #37119 (closed)
• x/tools/gopls: vim-installed gopls@v0.14.2 does not work (but command-line installed gopls@v0.14.2 is OK) #64889 (closed)
• x/tools/gopls: missing completion of current module packages #67528
• x/tools/gopls: autocompletion for dependencies not working in Emacs #43414 (closed)
• x/tools/gopls: gopls stopped responding when gomod failed. #38818 (closed)
• x/tools/gopls: Use source from GOMODCACHE if available even if the dependant module is vendored #52952 (closed)
• x/tools/gopls: nvim with go1.22 stopped working #66743 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[findleyr]

Gopls does index the standard library as well as module cache and any workspace dependencies, and should offer unimported completion in this case. I'm not able to reproduce using nvim+coc.nvim (my default editor setup). Can you try in VS Code?

[tyanxie]

@findleyr Thanks for your reply! The above problem was alleviated after I deleted the cache file of gopls (~/.cache/gopls/), but it seems that there is still a problem.

After I go get a new module in some repositories, gopls does not seem to index this module normally and give a prompt. For example, after I executed go get github.com/dustin/go-humanize@latest in one of my code repositories, I typed human in the code, and the code completion prompt did not pop up normally. I tested it with both vscode and neovim.

vscode:

#neovim:

Unfortunately, I cannot provide the code repository where I reproduced this problem. Maybe you need some more information. I can try to investigate whether it can be provided.

[tttoad]

@tyanxie This is probably caused by gopls not listening for changes to files under the $GOPATH path. You can use :LspRestart in neovim to reload.

[tyanxie]

@tyanxie This is probably caused by gopls not listening for changes to files under the $GOPATH path. You can use :LspRestart in neovim to reload.

Thanks for your solution, but unfortunately it doesn't work for me.

[pjweinb]

This will probably be fixed by the new code that indexes the module cache.