refactor!: extract mason-lspconfig to separate plugin (#109)

The rationale behind this is to make boundaries clearer as mason.nvim
has no direct relation with lspconfig per se.

Also, hopefully, by having it as a separate package like this would
encourage more people to write similar extensions (think mason-dap and
mason-null-ls). Ideally such extensions wouldn't be required at all, but
there are definitely gaps to fill as of today.

From now on you'll need to add `williamboman/mason-lspconfig.nvim` as
a plugin if you want to use the `mason-lspconfig` extension:

```lua
use {
    { "williamboman/mason.nvim", branch = "alpha" },
    "williamboman/mason-lspconfig.nvim",
    "neovim/nvim-lspconfig",
}
```

```lua
Plug "williamboman/mason.nvim", { 'branch': 'alpha' }
Plug "williamboman/mason-lspconfig.nvim"
Plug "neovim/nvim-lspconfig"
```

24 files changed, 0 insertions, 313 deletions

diff --git a/lua/mason-lspconfig/server_configurations/angularls/init.lua b/lua/mason-lspconfig/server_configurations/angularls/init.lua
deleted file mode 100644
index 813e5258..00000000
--- a/lua/mason-lspconfig/server_configurations/angularls/init.lua
+++ /dev/null
@@ -1,39 +0,0 @@
-local platform = require "mason-core.platform"
-local _ = require "mason-core.functional"
-local path = require "mason-core.path"
-
----@param install_dir string
-return function(install_dir)
-    local append_node_modules = _.map(function(dir)
-        return path.concat { dir, "node_modules" }
-    end)
-
-    local function get_cmd(workspace_dir)
-        local cmd = {
-            "ngserver",
-            "--stdio",
-            "--tsProbeLocations",
-            table.concat(append_node_modules { install_dir, workspace_dir }, ","),
-            "--ngProbeLocations",
-            table.concat(
-                append_node_modules {
-                    path.concat { install_dir, "node_modules", "@angular", "language-server" },
-                    workspace_dir,
-                },
-                ","
-            ),
-        }
-        if platform.is_win then
-            cmd[1] = vim.fn.exepath(cmd[1])
-        end
-
-        return cmd
-    end
-
-    return {
-        cmd = get_cmd(vim.loop.cwd()),
-        on_new_config = function(new_config, root_dir)
-            new_config.cmd = get_cmd(root_dir)
-        end,
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/apex_ls/init.lua b/lua/mason-lspconfig/server_configurations/apex_ls/init.lua
deleted file mode 100644
index 6251dc73..00000000
--- a/lua/mason-lspconfig/server_configurations/apex_ls/init.lua
+++ /dev/null
@@ -1,8 +0,0 @@
-local path = require "mason-core.path"
-
----@param install_dir string
-return function(install_dir)
-    return {
-        apex_jar_path = path.concat { install_dir, "apex-jorje-lsp.jar" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/bicep/init.lua b/lua/mason-lspconfig/server_configurations/bicep/init.lua
deleted file mode 100644
index ddc0a2af..00000000
--- a/lua/mason-lspconfig/server_configurations/bicep/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "bicep-lsp" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/bsl_ls/init.lua b/lua/mason-lspconfig/server_configurations/bsl_ls/init.lua
deleted file mode 100644
index 62dfa5c0..00000000
--- a/lua/mason-lspconfig/server_configurations/bsl_ls/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "bsl-language-server" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/elixirls/init.lua b/lua/mason-lspconfig/server_configurations/elixirls/init.lua
deleted file mode 100644
index 0c424b18..00000000
--- a/lua/mason-lspconfig/server_configurations/elixirls/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "elixir-ls" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/esbonio/init.lua b/lua/mason-lspconfig/server_configurations/esbonio/init.lua
deleted file mode 100644
index e9d8d988..00000000
--- a/lua/mason-lspconfig/server_configurations/esbonio/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "esbonio" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/groovyls/init.lua b/lua/mason-lspconfig/server_configurations/groovyls/init.lua
deleted file mode 100644
index 495c7592..00000000
--- a/lua/mason-lspconfig/server_configurations/groovyls/init.lua
+++ /dev/null
@@ -1,3 +0,0 @@
-return function()
-    return { cmd = "groovy-language-server" }
-end
diff --git a/lua/mason-lspconfig/server_configurations/julials/README.md b/lua/mason-lspconfig/server_configurations/julials/README.md
deleted file mode 100644
index 18e6880d..00000000
--- a/lua/mason-lspconfig/server_configurations/julials/README.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# julials
-
-## Configuring the Julia Environment
-
-The Julia Environment will be identified in the following order:
-
-1) user configuration (`lspconfig.julials.setup { julia_env_path = "/my/env" }`)
-2) if the `Project.toml` & `Manifest.toml` (or `JuliaProject.toml` & `JuliaManifest.toml`) files exists in the current project working directory, the current project working directory is used as the environment
-3) the result of `Pkg.Types.Context().env.project_file`
diff --git a/lua/mason-lspconfig/server_configurations/julials/init.lua b/lua/mason-lspconfig/server_configurations/julials/init.lua
deleted file mode 100644
index 6166e35d..00000000
--- a/lua/mason-lspconfig/server_configurations/julials/init.lua
+++ /dev/null
@@ -1,50 +0,0 @@
-local path = require "mason-core.path"
-local platform = require "mason-core.platform"
-local fs = require "mason-core.fs"
-local _ = require "mason-core.functional"
-
----@param install_dir string
-return function(install_dir)
-    return {
-        on_new_config = function(config, workspace_dir)
-            local env_path = config.julia_env_path and vim.fn.expand(config.julia_env_path)
-            if not env_path then
-                local file_exists = _.compose(fs.sync.file_exists, path.concat, _.concat { workspace_dir })
-                if file_exists { "Project.toml" } and file_exists { "Manifest.toml" } then
-                    env_path = workspace_dir
-                elseif file_exists { "JuliaProject.toml" } and file_exists { "JuliaManifest.toml" } then
-                    env_path = workspace_dir
-                end
-            end
-
-            if not env_path then
-                local ok, env = pcall(vim.fn.system, {
-                    "julia",
-                    "--startup-file=no",
-                    "--history-file=no",
-                    "-e",
-                    "using Pkg; print(dirname(Pkg.Types.Context().env.project_file))",
-                })
-                if ok then
-                    env_path = env
-                end
-            end
-
-            config.cmd = {
-                "julia",
-                "--startup-file=no",
-                "--history-file=no",
-                "--depwarn=no",
-                ("--project=%s"):format(path.concat { install_dir, "scripts", "environments", "languageserver" }),
-                path.concat { install_dir, "nvim-lsp.jl" },
-                vim.env.JULIA_DEPOT_PATH or "",
-                path.concat { install_dir, "symbolstorev5" },
-                env_path,
-            }
-        end,
-        cmd_env = {
-            JULIA_DEPOT_PATH = path.concat { install_dir, "lsdepot" },
-            JULIA_LOAD_PATH = platform.is.win and ";" or ":",
-        },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/kotlin_language_server/init.lua b/lua/mason-lspconfig/server_configurations/kotlin_language_server/init.lua
deleted file mode 100644
index 585797fc..00000000
--- a/lua/mason-lspconfig/server_configurations/kotlin_language_server/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "kotlin-language-server" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/ltex/init.lua b/lua/mason-lspconfig/server_configurations/ltex/init.lua
deleted file mode 100644
index f24d86f7..00000000
--- a/lua/mason-lspconfig/server_configurations/ltex/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "ltex-ls" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/omnisharp/README.md b/lua/mason-lspconfig/server_configurations/omnisharp/README.md
deleted file mode 100644
index 78255785..00000000
--- a/lua/mason-lspconfig/server_configurations/omnisharp/README.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# omnisharp
-
-## How to enable Omnisharp Mono
-
-By default, the `omnisharp` server will use the `dotnet` (NET6) runtime to run the server.
-To run the server using the Mono runtime, set the `use_modern_net` setting to `false`, like so:
-
-__This requires the `omnisharp-mono` package to be installed.__
-
-```lua
-local lspconfig = require("lspconfig")
-
-lspconfig.omnisharp.setup {
-    use_modern_net = false
-}
-```
diff --git a/lua/mason-lspconfig/server_configurations/omnisharp/init.lua b/lua/mason-lspconfig/server_configurations/omnisharp/init.lua
deleted file mode 100644
index 274ff182..00000000
--- a/lua/mason-lspconfig/server_configurations/omnisharp/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function(install_dir, config)
-    return {
-        cmd = { config.use_modern_net == false and "omnisharp-mono" or "omnisharp" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/perlnavigator/init.lua b/lua/mason-lspconfig/server_configurations/perlnavigator/init.lua
deleted file mode 100644
index c376dc77..00000000
--- a/lua/mason-lspconfig/server_configurations/perlnavigator/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "perlnavigator", "--stdio" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/powershell_es/init.lua b/lua/mason-lspconfig/server_configurations/powershell_es/init.lua
deleted file mode 100644
index d36a580b..00000000
--- a/lua/mason-lspconfig/server_configurations/powershell_es/init.lua
+++ /dev/null
@@ -1,6 +0,0 @@
----@param install_dir string
-return function(install_dir)
-    return {
-        bundle_path = install_dir,
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/psalm/init.lua b/lua/mason-lspconfig/server_configurations/psalm/init.lua
deleted file mode 100644
index 8dd3645a..00000000
--- a/lua/mason-lspconfig/server_configurations/psalm/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "psalm-language-server" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/pylsp/README.md b/lua/mason-lspconfig/server_configurations/pylsp/README.md
deleted file mode 100644
index 2434bb4b..00000000
--- a/lua/mason-lspconfig/server_configurations/pylsp/README.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# Pylsp
-
-## Installing pylsp plugins
-
-Pylsp has [third party plugins](https://github.com/python-lsp/python-lsp-server#3rd-party-plugins) which are not installed by default.
-
-In order for these plugins to work with the `pylsp` server managed by this plugin, they need to be installed in the same [virtual environment](https://docs.python.org/3/library/venv.html) as `pylsp`. For these reasons, there's a convenient `:PylspInstall <packages>` command that does this for you, for example:
-
-```vim
-:PylspInstall pyls-flake8 pylsp-mypy pyls-isort
-```
-
-The `:PylspInstall` command will only be available once the `pylsp` server has been set up.
-
-**Note that these extra pylsp plugins will not be reinstalled if you update/reinstall the `pylsp` server, you will have to manage
-them manually.**
diff --git a/lua/mason-lspconfig/server_configurations/pylsp/init.lua b/lua/mason-lspconfig/server_configurations/pylsp/init.lua
deleted file mode 100644
index 9626fdca..00000000
--- a/lua/mason-lspconfig/server_configurations/pylsp/init.lua
+++ /dev/null
@@ -1,51 +0,0 @@
-local a = require "mason-core.async"
-local _ = require "mason-core.functional"
-local pip3 = require "mason-core.managers.pip3"
-local process = require "mason-core.process"
-local notify = require "mason-core.notify"
-local spawn = require "mason-core.spawn"
-
----@param install_dir string
-return function(install_dir)
-    vim.api.nvim_create_user_command(
-        "PylspInstall",
-        a.scope(function(opts)
-            local plugins = opts.fargs
-            local plugins_str = table.concat(plugins, ", ")
-            notify(("Installing %s..."):format(plugins_str))
-            local result = spawn.pip {
-                "install",
-                "-U",
-                "--disable-pip-version-check",
-                plugins,
-                stdio_sink = process.simple_sink(),
-                with_paths = { pip3.venv_path(install_dir) },
-            }
-            if vim.in_fast_event() then
-                a.scheduler()
-            end
-            result
-                :on_success(function()
-                    notify(("Successfully installed pylsp plugins %s"):format(plugins_str))
-                end)
-                :on_failure(function()
-                    notify("Failed to install requested pylsp plugins.", vim.log.levels.ERROR)
-                end)
-        end),
-        {
-            desc = "[mason.nvim] Installs the provided packages in the same venv as pylsp.",
-            nargs = "+",
-            complete = _.always {
-                "pyls-flake8",
-                "pylsp-mypy",
-                "pyls-spyder",
-                "pyls-isort",
-                "python-lsp-black",
-                "pyls-memestra",
-                "pylsp-rope",
-            },
-        }
-    )
-
-    return {}
-end
diff --git a/lua/mason-lspconfig/server_configurations/r_language_server/init.lua b/lua/mason-lspconfig/server_configurations/r_language_server/init.lua
deleted file mode 100644
index 84b004c5..00000000
--- a/lua/mason-lspconfig/server_configurations/r_language_server/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "r-languageserver" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/rescriptls/init.lua b/lua/mason-lspconfig/server_configurations/rescriptls/init.lua
deleted file mode 100644
index 2f55cc30..00000000
--- a/lua/mason-lspconfig/server_configurations/rescriptls/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "rescript-lsp", "--stdio" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/solang/init.lua b/lua/mason-lspconfig/server_configurations/solang/init.lua
deleted file mode 100644
index 2d8dcf79..00000000
--- a/lua/mason-lspconfig/server_configurations/solang/init.lua
+++ /dev/null
@@ -1,14 +0,0 @@
-local path = require "mason-core.path"
-local process = require "mason-core.process"
-
----@param install_dir string
-return function(install_dir)
-    return {
-        cmd_env = {
-            PATH = process.extend_path {
-                path.concat { install_dir, "llvm13.0", "bin" },
-                path.concat { install_dir, "llvm12.0", "bin" }, -- kept for backwards compatibility
-            },
-        },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/tflint/README.md b/lua/mason-lspconfig/server_configurations/tflint/README.md
deleted file mode 100644
index 51298d69..00000000
--- a/lua/mason-lspconfig/server_configurations/tflint/README.md
+++ /dev/null
@@ -1,14 +0,0 @@
-# tflint
-
-## Installing TFLint plugins
-
-TFLint has [third party plugins](https://github.com/terraform-linters/tflint/blob/master/docs/user-guide/plugins.md) which are not installed by default.
-
-To install TFLint plugins, there's a convenient `:TFLintInit` command that does this for you. It will use Neovim's
-current working directory to locate the plugins to install (according to `tflint --init`):
-
-```
-:TFLintInit
-```
-
-The `:TFLintInit` command will only be available once the `tflint` server has been set up.
diff --git a/lua/mason-lspconfig/server_configurations/visualforce_ls/init.lua b/lua/mason-lspconfig/server_configurations/visualforce_ls/init.lua
deleted file mode 100644
index 7d4c0ec3..00000000
--- a/lua/mason-lspconfig/server_configurations/visualforce_ls/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-return function()
-    return {
-        cmd = { "visualforce-language-server", "--stdio" },
-    }
-end
diff --git a/lua/mason-lspconfig/server_configurations/volar/init.lua b/lua/mason-lspconfig/server_configurations/volar/init.lua
deleted file mode 100644
index e1d98e77..00000000
--- a/lua/mason-lspconfig/server_configurations/volar/init.lua
+++ /dev/null
@@ -1,27 +0,0 @@
-local fs = require "mason-core.fs"
-local path = require "mason-core.path"
-
----@param install_dir string
-return function(install_dir)
-    ---@param dir string
-    local function get_tsserverlib_path(dir)
-        return path.concat { dir, "node_modules", "typescript", "lib", "tsserverlibrary.js" }
-    end
-
-    ---@param workspace_dir string|nil
-    local function get_typescript_server_path(workspace_dir)
-        local local_tsserverlib = workspace_dir ~= nil and get_tsserverlib_path(workspace_dir)
-        local vendored_tsserverlib = get_tsserverlib_path(install_dir)
-        if local_tsserverlib and fs.sync.file_exists(local_tsserverlib) then
-            return local_tsserverlib
-        else
-            return vendored_tsserverlib
-        end
-    end
-
-    return {
-        on_new_config = function(new_config, new_install_dir)
-            new_config.init_options.typescript.serverPath = get_typescript_server_path(new_install_dir)
-        end,
-    }
-end