I'd like to set up autocompletion in Vim akin to VS Code "code-d" plugin which uses DCD server for completion. According to https://wiki.dlang.org/D_in_Vim, one can use dutyl plugin for this purpose. I have installed the plugin as well as dcd-server/client, Dscanner and dfmt, everything that was mentioned in dutyl README. However, after starting the server and working on a D script I am not getting any autocompletion results.
Moreover, I simply don't know how to invoke dutyl autocompletion. Although looking into the plugin source code, I believe autocompletion should just work once you type "." or parenthesis. It does not. This is how my .vimrc set for dutyl:

let g:dutyl_stdImportPaths=['/usr/bin/dmd']
let g:dutyl_dontUseVimProc=1

If would be great if some D Vimers shared their setup or gave and advice on how to configure D autocompletion in Vim.

On Thursday, 26 December 2019 at 18:38:23 UTC, p.shkadzko wrote:
> I'd like to set up autocompletion in Vim akin to VS Code "code-d" plugin which uses DCD server for completion. According to https://wiki.dlang.org/D_in_Vim, one can use dutyl plugin for this purpose. I have installed the plugin as well as dcd-server/client, Dscanner and dfmt, everything that was mentioned in dutyl README. However, after starting the server and working on a D script I am not getting any autocompletion results.
> Moreover, I simply don't know how to invoke dutyl autocompletion. Although looking into the plugin source code, I believe autocompletion should just work once you type "." or parenthesis. It does not. This is how my .vimrc set for dutyl:
>
> let g:dutyl_stdImportPaths=['/usr/bin/dmd']
> let g:dutyl_dontUseVimProc=1
>
> If would be great if some D Vimers shared their setup or gave and advice on how to configure D autocompletion in Vim.

do you get something after

    `void main(){ int.`

?. This invokes builtin completions but generally DCD needs to know a few root paths to D libraries. So if the sample I give you works then you must certainly configure dcd so that it knows phobos sources path and druntime sources path.

On Thursday, 26 December 2019 at 18:59:16 UTC, user7892 wrote:
>
> do you get something after
>
>     `void main(){ int.`
>
> ?. This invokes builtin completions but generally DCD needs to know a few root paths to D libraries. So if the sample I give you works then you must certainly configure dcd so that it knows phobos sources path and druntime sources path.

No, I am not getting any response from Vim after typing "int." inside main(){}. I tested dcd-server in console and it works as expected:

$ echo | dcd-client --search toImpl
/usr/include/dlang/dmd/std/conv.d	f	55647
/usr/include/dlang/dmd/std/conv.d	f	54285
/usr/include/dlang/dmd/std/conv.d	f	52624
/usr/include/dlang/dmd/std/conv.d	f	52314
/usr/include/dlang/dmd/std/conv.d	f	45257
/usr/include/dlang/dmd/std/conv.d	f	43253
/usr/include/dlang/dmd/std/conv.d	f	39946
/usr/include/dlang/dmd/std/conv.d	f	37388
/usr/include/dlang/dmd/std/conv.d	f	29814
/usr/include/dlang/dmd/std/conv.d	f	25478
/usr/include/dlang/dmd/std/conv.d	f	21394
/usr/include/dlang/dmd/std/conv.d	f	19900
/usr/include/dlang/dmd/std/conv.d	f	19137
/usr/include/dlang/dmd/std/conv.d	f	18129
/usr/include/dlang/dmd/std/conv.d	f	17787
/usr/include/dlang/dmd/std/conv.d	f	14365

dcd-server response

2019-12-26T21:07:55.997 [info] main.d:130:runServer Starting up...
2019-12-26T21:07:55.997 [info] server.d:94:loadConfiguredImportDirs Loading configuration from /etc/dcd.conf
2019-12-26T21:07:55.997 [info] main.d:157:runServer Cleaning up old socket file at /run/user/1000/dcd.socket
2019-12-26T21:07:55.998 [info] main.d:164:runServer Listening at /run/user/1000/dcd.socket
2019-12-26T21:07:55.998 [info] main.d:181:runServer Import directories:
    /usr/include/dlang/dmd
2019-12-26T21:07:55.998 [info] main.d:187:runServer 0 symbols cached.
2019-12-26T21:07:55.998 [info] main.d:188:runServer Startup completed in 0 milliseconds.
2019-12-26T21:16:20.015 [warning] first.d:459:visit Could not resolve location of module 'ldc/intrinsics'
2019-12-26T21:16:20.225 [warning] first.d:459:visit Could not resolve location of module 'core/sys/openbsd/sys/cdefs'
2019-12-26T21:16:20.310 [warning] first.d:459:visit Could not resolve location of module 'gcc/builtins'
2019-12-26T21:16:20.314 [warning] first.d:459:visit Could not resolve location of module 'gcc/builtins'
2019-12-26T21:16:20.334 [warning] first.d:459:visit Could not resolve location of module 'core/sys/netbsd/execinfo'
2019-12-26T21:16:20.546 [warning] first.d:459:visit Could not resolve location of module 'core/sys/openbsd/sys/cdefs'
2019-12-26T21:16:20.903 [info] main.d:302:runServer Request processed in 1250 milliseconds

On Thursday, 26 December 2019 at 18:38:23 UTC, p.shkadzko wrote:
> I'd like to set up autocompletion in Vim akin to VS Code "code-d" plugin which uses DCD server for completion. According to https://wiki.dlang.org/D_in_Vim, one can use dutyl plugin for this purpose. I have installed the plugin as well as dcd-server/client, Dscanner and dfmt, everything that was mentioned in dutyl README. However, after starting the server and working on a D script I am not getting any autocompletion results.
> Moreover, I simply don't know how to invoke dutyl autocompletion. Although looking into the plugin source code, I believe autocompletion should just work once you type "." or parenthesis. It does not. This is how my .vimrc set for dutyl:
>
> let g:dutyl_stdImportPaths=['/usr/bin/dmd']
> let g:dutyl_dontUseVimProc=1
>
> If would be great if some D Vimers shared their setup or gave and advice on how to configure D autocompletion in Vim.

I would recommend using a language server [1] for this. You can install either Serve-D [2] or DLS [3], then use one of the many Vim/Neovim plugins [4] to use one of those servers.

The best explanation for what language servers are and how they work is probably the official one [5]; but in a nutshell, it boils down to deferring things such as autocompletion to an external program, just like DCD, except those programs (the "language servers") follow a specification (the "Language Server Protocol") to make them usable with any editor that also conforms to the spec.

Very often, for editors, the Language Server Protocol is implemented via plugins, and Vim and Neovim have 5 plugins listed for this [4], so you have ample choice on what you'd prefer to use. Each one of them should have the instructions you need to get started in their repository's README.

[1] https://microsoft.github.io/language-server-protocol
[2] https://github.com/Pure-D/serve-d
[3] https://github.com/d-language-server/dls
[4] https://microsoft.github.io/language-server-protocol/implementors/tools
[5] https://microsoft.github.io/language-server-protocol/overview

On Thursday, 26 December 2019 at 19:20:18 UTC, p.shkadzko wrote:
> On Thursday, 26 December 2019 at 18:59:16 UTC, user7892 wrote:
>>
>> do you get something after
>>
>>     `void main(){ int.`
>>
>> ?. This invokes builtin completions but generally DCD needs to know a few root paths to D libraries. So if the sample I give you works then you must certainly configure dcd so that it knows phobos sources path and druntime sources path.
>
> No, I am not getting any response from Vim after typing "int." inside main(){}. I tested dcd-server in console and it works as expected:
>

okay so it's clearly not what I imagined that could be the problem.

On Thursday, 26 December 2019 at 18:38:23 UTC, p.shkadzko wrote:
> I'd like to set up autocompletion in Vim akin to VS Code "code-d" plugin which uses DCD server for completion. According to https://wiki.dlang.org/D_in_Vim, one can use dutyl plugin for this purpose. I have installed the plugin as well as dcd-server/client, Dscanner and dfmt, everything that was mentioned in dutyl README. However, after starting the server and working on a D script I am not getting any autocompletion results.
> Moreover, I simply don't know how to invoke dutyl autocompletion. Although looking into the plugin source code, I believe autocompletion should just work once you type "." or parenthesis. It does not. This is how my .vimrc set for dutyl:
>
> [...]

It appears that I added to Windows PATH a bin folder with precompiled dmd binaries but not with phobos source files. dutyl requires a path to phobos sources.
Thank you guys.