How to configure LSP servers installed with mason?

[Orlinky]

Hello, I tried going from lsp-installer to mason for my LSP servers installation but I am hiting a wall when I try to configure the servers. The installation part is working fine.

Here is how I am trying to do it unsuccessfully:

local status_ok, mason_lspconfig = pcall(require, "mason-lspconfig")
if not status_ok then
  vim.notify("Couldn't load Mason-LSP-Config" .. mason_lspconfig, "error")
  return
end

mason_lspconfig.setup({
  ensure_installed = { "ansible-language-server", "clangd", "cmake-language-servere", "css-lsp", "html-lsp", "json-lsp",
    "lemminx", "lua-language-server", "pyright", "rust_analyzer", "ltex-ls", "taplo", "terraform-ls",
    "vim-language-server", "yaml-language-server" },
})

mason_lspconfig.setup_handlers({
  function(server_name) -- Default handler (optional)
    require("lspconfig")[server_name].setup {
      on_attach = require("plugins.lsp.lsp-config").on_attach,
      capabilities = require("plugins.lsp.lsp-config").capabilities,
    }
  end,
  
  ["lua-language-server"] = function()
    return {
      on_attach = require("plugins.lsp.lsp-config").on_attach,
      capabilities = require("plugins.lsp.lsp-config").capabilities,

      settings = {
        Lua = {
          diagnostics = {
            globals = { "vim" },
          },
          
          workspace = {
            library = {
              [vim.fn.expand("$VIMRUNTIME/lua")] = true,
              [vim.fn.stdpath("config") .. "/lua"] = true,
            },
          },
        },
      },
    }
  end,
})

The key word vim is still marked as an error meaning that my settings are not applied. I tried reading the documentation but the example provided with rust-analyzer didn't help me much or maybe I just misunderstood it. 😅

[Orlinky]

After taking a break and reading this question I found my answer:

["sumneko_lua"] = function()
    require("lspconfig").sumneko_lua.setup({
      on_attach = opts.on_attach,
      capabilities = opts.capabilities,

      settings = {
        Lua = {
          diagnostics = {
            globals = { "vim" },
          },

          workspace = {
            library = {
              [vim.fn.expand("$VIMRUNTIME/lua")] = true,
              [vim.fn.stdpath("config") .. "/lua"] = true,
            },
          },
        },
      },
    })

[punowo]

@Orlinky Hello, could you please post your working configuration again. I don't know what I did but sumneko_lua no longer recognises the "vim" global or other.

[Orlinky]

@punowo Sure, here it is, I hope it helps you find the problem, yours helped me tremendously when I was stuck!

local mason_status_ok, mason_lspconfig = pcall(require, "mason-lspconfig")
if not mason_status_ok then
  vim.notify("Couldn't load Mason-LSP-Config" .. mason_lspconfig, "error")
  return
end

-- Extension to bridge mason.nvim with the lspconfig plugin
mason_lspconfig.setup({
  -- A list of servers to automatically install if they're not already installed.
  ensure_installed = { "ansible-language-server", "clangd", "cmake-language-servere", "css-lsp", "html-lsp", "json-lsp",
    "lemminx", "lua-language-server", "pyright", "rust_analyzer", "ltex-ls", "taplo", "terraform-ls",
    "vim-language-server", "yaml-language-server" },
})

local lspconfig_status_ok, lspconfig = pcall(require, "lspconfig")
if not lspconfig_status_ok then
  vim.notify("Couldn't load LSP-Config" .. lspconfig, "error")
  return
end

local opts = {
  on_attach = require("plugins.lsp.lsp-config").on_attach,
  capabilities = require("plugins.lsp.lsp-config").capabilities,
}

mason_lspconfig.setup_handlers({
  -- The first entry (without a key) will be the default handler
  -- and will be called for each installed server that doesn't have
  -- a dedicated handler.
  function(server_name) -- Default handler (optional)
    lspconfig[server_name].setup {
      on_attach = opts.on_attach,
      capabilities = opts.capabilities,
    }
  end,

  -- Next, you can provide targeted overrides for specific servers.
  -- For example, a handler override for the `rust_analyzer`:
  ["rust_analyzer"] = function()
    require('rust-tools').setup({})
  end,

  ["sumneko_lua"] = function()
    lspconfig.sumneko_lua.setup({
      on_attach = opts.on_attach,
      capabilities = opts.capabilities,

      settings = {
        Lua = {
          -- Tells Lua that a global variable named vim exists to not have warnings when configuring neovim
          diagnostics = {
            globals = { "vim" },
          },

          workspace = {
            library = {
              [vim.fn.expand("$VIMRUNTIME/lua")] = true,
              [vim.fn.stdpath("config") .. "/lua"] = true,
            },
          },
        },
      },
    })
  end,

  ["pyright"] = function()
    lspconfig.pyright.setup({
      on_attach = opts.on_attach,
      capabilities = opts.capabilities,

      settings = {
        python = {
          analysis = {
            -- Disable strict type checking
            typeCheckingMode = "off"
          }
        }
      },
    })
  end,

  ["jsonls"] = function()
    -- Find more schemas here: https://www.schemastore.org/json/
    -- Schemas for common json files
    local schemas = {
      {
        description = "Schema for CMake Presets",
        fileMatch = {
          "CMakePresets.json",
          "CMakeUserPresets.json",
        },
        url = "https://raw.githubusercontent.com/Kitware/CMake/master/Help/manual/presets/schema.json",
      },
      {
        description = "LLVM compilation database",
        fileMatch = {
          "compile_commands.json",
        },
        url = "https://json.schemastore.org/compile-commands.json",
      },
      {
        description = "Config file for Command Task Runner",
        fileMatch = {
          "commands.json",
        },
        url = "https://json.schemastore.org/commands.json",
      },
      {
        description = "Json schema for properties json file for a GitHub Workflow template",
        fileMatch = {
          ".github/workflow-templates/**.properties.json",
        },
        url = "https://json.schemastore.org/github-workflow-template-properties.json",
      },
      {
        description = "JSON schema for Visual Studio component configuration files",
        fileMatch = {
          "*.vsconfig",
        },
        url = "https://json.schemastore.org/vsconfig.json",
      },
    }

    lspconfig.jsonls.setup({
      on_attach = opts.on_attach,
      capabilities = opts.capabilities,

      settings = {
        json = {
          schemas = schemas,
        },
      },

      setup = {
        commands = {
          Format = {
            function()
              vim.lsp.buf.range_formatting({}, { 0, 0 }, { vim.fn.line "$", 0 })
            end,
          },
        },
      },
    })
  end,
})