After wasting a bit of time the last few days, I figured out how to get the Gnu Emacs editor to work with the Omnisharp-Roslyn LSP server for C#. Finding the right solution required a lot of trial and error work because I work mainly on Windows, and that is completely sacrilegious.<\/p>\n\n\n\n
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First off: Why Emacs? Sorry, but I grew up with Emacs and vi, starting in the early ’80s. Emacs was decent, and it still is. It comes in handy on the command line for a GUI-less Linux server. <\/p>\n\n\n\n
There are two Gnu Emacs clients. One is written by OmniSharp before LSP existed, at https:\/\/github.com\/OmniSharp\/omnisharp-emacs<\/a> . This client works fine, but the short instructions at http:\/\/www.omnisharp.net\/#integrations<\/a> are completely bogus. The other is https:\/\/github.com\/emacs-lsp\/lsp-mode\/<\/a> . This is what I use below. Like the instructions for omnisharp-emacs, the instructions here are terrible. But, it does work. All operations, like “go to definition” are defined as functions that begin with “lsp-“, available through the M-x command, e.g., M-x lsp-find-references.<\/p>\n\n\n\n You will need to change the location of the Omnisharp-roslyn server executable which you built in step 2 in this init.el file.<\/p>\n\n\n\n Start Gnu Emacs and open a C# file and follow the instructions. All operations begin with M-x lsp-.<\/p>\n","protected":false},"excerpt":{"rendered":" After wasting a bit of time the last few days, I figured out how to get the Gnu Emacs editor to work with the Omnisharp-Roslyn LSP server for C#. Finding the right solution required a lot of trial and error work because I work mainly on Windows, and that is completely sacrilegious.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/posts\/2352"}],"collection":[{"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/comments?post=2352"}],"version-history":[{"count":0,"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/posts\/2352\/revisions"}],"wp:attachment":[{"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/media?parent=2352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/categories?post=2352"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/165.227.223.229\/index.php\/wp-json\/wp\/v2\/tags?post=2352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}(require 'package)\n (let* ((no-ssl (and (memq system-type '(windows-nt ms-dos))\n (not (gnutls-available-p))))\n (proto (if no-ssl \"http\" \"https\")))\n (when no-ssl\n (warn \"\\\n Your version of Emacs does not support SSL connections,\n which is unsafe because it allows man-in-the-middle attacks.\n There are two things you can do about this warning:\n Install an Emacs version that does support SSL and be safe.\n Remove this warning from your init file so you won't see it again.\"))\n ;; Comment\/uncomment these two lines to enable\/disable MELPA and MELPA Stable as desired\n (add-to-list 'package-archives (cons \"melpa\" (concat proto \":\/\/melpa.org\/packages\/\")) t)\n ;;(add-to-list 'package-archives (cons \"melpa-stable\" (concat proto \":\/\/stable.melpa.org\/packages\/\")) t)\n (when (< emacs-major-version 24)\n ;; For important compatibility libraries like cl-lib\n (add-to-list 'package-archives (cons \"gnu\" (concat proto \":\/\/elpa.gnu.org\/packages\/\")))))\n (package-initialize) \n ;; Added by Package.el. This must come before configurations of\n ;; installed packages. Don't delete this line. If you don't want it,\n ;; just comment it out by adding a semicolon to the start of the line.\n ;; You may delete these explanatory comments.\n (package-initialize)\n ;;(custom-set-variables\n ;; custom-set-variables was added by Custom.\n ;; If you edit it by hand, you could mess it up, so be careful.\n ;; Your init file should contain only one such instance.\n ;; If there is more than one, they won't work right.\n ;; '(package-selected-packages (quote (omnisharp lsp-mode))))\n (custom-set-faces\n ;; custom-set-faces was added by Custom.\n ;; If you edit it by hand, you could mess it up, so be careful.\n ;; Your init file should contain only one such instance.\n ;; If there is more than one, they won't work right.\n '(default ((t (:family \"Courier New\" :foundry \"outline\" :slant normal :weight normal :height 161 :width normal)))))\n (package-refresh-contents)\n (package-install 'flycheck)\n (global-flycheck-mode)\n (require 'lsp-mode)\n (add-hook 'csharp-mode-hook #'lsp)\n ;;(package-install 'omnisharp)\n ;;(add-hook 'csharp-mode-hook 'omnisharp-mode)\n ;;\n ;;\n (defcustom lsp-clients-csharp-language-server-path\n (expand-file-name \"c:\/users\/etcetcetc\/documents\/omnisharp-roslyn\/bin\/debug\/omnisharp.stdio.driver\/net472\/OmniSharp.exe\")\n \"The path to the OmnisSharp Roslyn language-server.\"\n :group 'lsp-csharp\n :type '(string :tag \"Single string value\"))\n (custom-set-variables\n ;; custom-set-variables was added by Custom.\n ;; If you edit it by hand, you could mess it up, so be careful.\n ;; Your init file should contain only one such instance.\n ;; If there is more than one, they won't work right.\n '(package-selected-packages (quote (flycheck omnisharp lsp-mode))))<\/pre>\n\n\n\n