add mono version of omnisharp (#688)

1 files changed, 42 insertions, 31 deletions

diff --git a/lua/nvim-lsp-installer/servers/omnisharp/init.lua b/lua/nvim-lsp-installer/servers/omnisharp/init.lua
index ba15f1d4..d570e57e 100644
--- a/lua/nvim-lsp-installer/servers/omnisharp/init.lua
+++ b/lua/nvim-lsp-installer/servers/omnisharp/init.lua
@@ -4,9 +4,30 @@ local path = require "nvim-lsp-installer.core.path"
 local functional = require "nvim-lsp-installer.core.functional"
 local github = require "nvim-lsp-installer.core.managers.github"
 local std = require "nvim-lsp-installer.core.managers.std"
+local Result = require "nvim-lsp-installer.core.result"
 
 local coalesce, when = functional.coalesce, functional.when
 
+local generate_cmd = function(root_dir)
+    if vim.fn.executable "mono" then
+        return {
+            "mono",
+            path.concat { root_dir, "omnisharp-mono", "OmniSharp.exe" },
+            "--languageserver",
+            "--hostPID",
+            tostring(vim.fn.getpid()),
+        }
+    else
+        return {
+            "dotnet",
+            path.concat { root_dir, "omnisharp", "OmniSharp.dll" },
+            "--languageserver",
+            "--hostPID",
+            tostring(vim.fn.getpid()),
+        }
+    end
+end
+
 return function(name, root_dir)
     return server.Server:new {
         name = name,
@@ -15,47 +36,37 @@ return function(name, root_dir)
         languages = { "c#" },
         ---@param ctx InstallContext
         installer = function(ctx)
-            std.ensure_executable("dotnet", { help_url = "https://dotnet.microsoft.com/download" })
+            Result.run_catching(function()
+                std.ensure_executable("mono", { help_url = "https://www.mono-project.com/download/stable/" })
+            end):recover(function()
+                std.ensure_executable("dotnet", { help_url = "https://dotnet.microsoft.com/download" })
+            end)
 
-            -- We write to the omnisharp directory for backwards compatibility reasons
             ctx.fs:mkdir "omnisharp"
             ctx:chdir("omnisharp", function()
-                github.unzip_release_file({
+                github.unzip_release_file {
                     repo = "OmniSharp/omnisharp-roslyn",
                     asset_file = coalesce(
-                        when(
-                            platform.is_mac,
-                            coalesce(
-                                when(platform.arch == "x64", "omnisharp-osx-x64-net6.0.zip"),
-                                when(platform.arch == "arm64", "omnisharp-osx-arm64-net6.0.zip")
-                            )
-                        ),
-                        when(
-                            platform.is_linux,
-                            coalesce(
-                                when(platform.arch == "x64", "omnisharp-linux-x64-net6.0.zip"),
-                                when(platform.arch == "arm64", "omnisharp-linux-arm64-net6.0.zip")
-                            )
-                        ),
-                        when(
-                            platform.is_win,
-                            coalesce(
-                                when(platform.arch == "x64", "omnisharp-win-x64-net6.0.zip"),
-                                when(platform.arch == "arm64", "omnisharp-win-arm64-net6.0.zip")
-                            )
-                        )
+                        when(platform.is.mac_x64, "omnisharp-osx-x64-net6.0.zip"),
+                        when(platform.is.mac_arm64, "omnisharp-osx-arm64-net6.0.zip"),
+                        when(platform.is.linux_x64 == "x64", "omnisharp-linux-x64-net6.0.zip"),
+                        when(platform.is.linux_arm64, "omnisharp-linux-arm64-net6.0.zip"),
+                        when(platform.is.win_x64, "omnisharp-win-x64-net6.0.zip"),
+                        when(platform.is.win_arm64, "omnisharp-win-arm64-net6.0.zip")
                     ),
+                }
+            end)
+
+            ctx.fs:mkdir "omnisharp-mono"
+            ctx:chdir("omnisharp-mono", function()
+                github.unzip_release_file({
+                    repo = "OmniSharp/omnisharp-roslyn",
+                    asset_file = "omnisharp-mono.zip",
                 }).with_receipt()
             end)
         end,
         default_options = {
-            cmd = {
-                "dotnet",
-                path.concat { root_dir, "omnisharp", "OmniSharp.dll" },
-                "--languageserver",
-                "--hostPID",
-                tostring(vim.fn.getpid()),
-            },
+            cmd = generate_cmd(root_dir),
         },
     }
 end