intelephense (PHP) #61

* use composer.json for root
* prefer cwd unless root is outside cwd

3 files changed, 88 insertions, 0 deletions

diff --git a/lua/nvim_lsp.lua b/lua/nvim_lsp.lua
index 9f8c3df5..f09b3835 100644
--- a/lua/nvim_lsp.lua
+++ b/lua/nvim_lsp.lua
@@ -11,6 +11,7 @@ require 'nvim_lsp/fortls'
 require 'nvim_lsp/ghcide'
 require 'nvim_lsp/gopls'
 require 'nvim_lsp/hie'
+require 'nvim_lsp/intelephense'
 require 'nvim_lsp/leanls'
 require 'nvim_lsp/pyls'
 require 'nvim_lsp/pyls_ms'
diff --git a/lua/nvim_lsp/intelephense.lua b/lua/nvim_lsp/intelephense.lua
new file mode 100644
index 00000000..077c2aaf
--- /dev/null
+++ b/lua/nvim_lsp/intelephense.lua
@@ -0,0 +1,72 @@
+local skeleton = require 'nvim_lsp/skeleton'
+local util = require 'nvim_lsp/util'
+local lsp = vim.lsp
+
+local server_name = "intelephense"
+local bin_name = "intelephense"
+
+local installer = util.npm_installer {
+  server_name = server_name;
+  packages = { "intelephense" };
+  binaries = {bin_name};
+}
+
+skeleton[server_name] = {
+  default_config = util.utf8_config {
+    cmd = {bin_name, "--stdio"};
+    filetypes = {"php"};
+    root_dir = function (pattern)
+      local cwd  = vim.loop.cwd();
+      local root = util.root_pattern("composer.json", ".git")(pattern);
+
+      -- prefer cwd if root is a descendant
+      return util.path.is_descendant(cwd, root) and cwd or root;
+    end;
+    log_level = lsp.protocol.MessageType.Warning;
+  };
+  on_new_config = function(new_config)
+    local install_info = installer.info()
+    if install_info.is_installed then
+      if type(new_config.cmd) == 'table' then
+        -- Try to preserve any additional args from upstream changes.
+        new_config.cmd[1] = install_info.binaries[bin_name]
+      else
+        new_config.cmd = {install_info.binaries[bin_name]}
+      end
+    end
+  end;
+  docs = {
+    description = [[
+https://intelephense.com/
+
+`intelephense` can be installed via `:LspInstall intelephense` or by yourself with `npm`: 
+```sh
+npm install -g intelephense
+```
+]];
+    default_config = {
+      root_dir = [[root_pattern("composer.json", ".git")]];
+      on_init = [[function to handle changing offsetEncoding]];
+      capabilities = [[default capabilities, with offsetEncoding utf-8]];
+      init_options = [[{
+        storagePath = Optional absolute path to storage dir. Defaults to os.tmpdir().
+        globalStoragePath = Optional absolute path to a global storage dir. Defaults to os.homedir().
+        licenceKey = Optional licence key or absolute path to a text file containing the licence key.
+        clearCache = Optional flag to clear server state. State can also be cleared by deleting {storagePath}/intelephense
+        -- See https://github.com/bmewburn/intelephense-docs#initialisation-options
+      }]];
+      settings = [[{
+        intelephense = {
+          files = {
+            maxSize = 1000000;
+          };
+        };
+        -- See https://github.com/bmewburn/intelephense-docs#configuration-options
+      }]];
+    };
+  };
+}
+
+skeleton[server_name].install = installer.install
+skeleton[server_name].install_info = installer.info
+-- vim:et ts=2 sw=2
diff --git a/lua/nvim_lsp/util.lua b/lua/nvim_lsp/util.lua
index c57f21c7..9c880d85 100644
--- a/lua/nvim_lsp/util.lua
+++ b/lua/nvim_lsp/util.lua
@@ -182,6 +182,20 @@ M.path = (function()
     return it, path, path
   end
 
+  local function is_descendant(root, path)
+    if (not path) then
+      return false;
+    end
+
+    local function cb(dir, _)
+      return dir == root;
+    end
+
+    local dir, _ = traverse_parents(path, cb);
+
+    return dir == root;
+  end
+
   return {
     is_dir = is_dir;
     is_file = is_file;
@@ -191,6 +205,7 @@ M.path = (function()
     join = path_join;
     traverse_parents = traverse_parents;
     iterate_parents = iterate_parents;
+    is_descendant = is_descendant;
   }
 end)()