Make the root folder optional

src/fennel-ls/compiler.fnl

@@ -55,7 +55,7 @@ identifiers are declared / referenced in which places."
     {:start position :end position}))
 
 
-(λ compile [{:configuration {: macro-path} : root-uri &as self} file]
+(λ compile [{:configuration {: macro-path} :root-uri ?root-uri &as self} file]
   "Compile the file, and record all the useful information from the compiler into the file object"
   ;; The useful information being recorded:
   (let [definitions-by-scope (doto {} (setmetatable has-tables-mt))
@@ -364,14 +364,16 @@ identifiers are declared / referenced in which places."
 
       ;; This is bad; we mutate fennel.macro-path
       (let [old-macro-path fennel.macro-path]
-        (set fennel.macro-path
-             (searcher.add-workspaces-to-path macro-path [root-uri]))
+        (when ?root-uri
+          (set fennel.macro-path
+               (searcher.add-workspaces-to-path macro-path [?root-uri])))
 
         ;; compile
         (each [_i form (ipairs (if macro-file? (ast->macro-ast ast) ast))]
           (filter-errors :compiler (xpcall #(fennel.compile form opts) fennel.traceback)))
 
-        (set fennel.macro-path old-macro-path))
+        (when ?root-uri
+          (set fennel.macro-path old-macro-path)))
 
       (each [_ cmd (ipairs defer)]
         (cmd))

src/fennel-ls/searcher.fnl

@@ -42,19 +42,21 @@ I suspect this file may be gone after a bit of refactoring."
        (case (io.open (utils.uri->path uri))
          f (do (f:close) true))))
 
-(λ lookup [{:configuration {: fennel-path} : root-uri &as self} mod]
-  (let [mod (mod:gsub "%." sep)
-        root-path (utils.uri->path root-uri)]
-    (accumulate [uri nil
-                 segment (fennel-path:gmatch "[^;]+")
-                 &until uri]
-      (let [segment (segment:gsub "%?" mod)
-            segment (if (absolute? segment)
-                      segment
-                      (join root-path segment))
-            segment (utils.path->uri segment)]
-        (if (file-exists? self segment)
-          segment)))))
+(λ lookup [{:configuration {: fennel-path} :root-uri ?root-uri &as self} mod]
+  "Use the fennel path to find a file on disk"
+  (when ?root-uri
+    (let [mod (mod:gsub "%." sep)
+          root-path (utils.uri->path ?root-uri)]
+      (accumulate [uri nil
+                   segment (fennel-path:gmatch "[^;]+")
+                   &until uri]
+        (let [segment (segment:gsub "%?" mod)
+              segment (if (absolute? segment)
+                        segment
+                        (join root-path segment))
+              segment (utils.path->uri segment)]
+          (if (file-exists? self segment)
+            segment))))))
 
 {: lookup
  : add-workspaces-to-path}

test/utils/client.fnl

@@ -11,24 +11,25 @@
   (.. "file://" ROOT-PATH))
 
 (local default-encoding :utf-8)
-(local default-params
-   {:capabilities {:general {:positionEncodings [default-encoding]}}
-    :clientInfo {:name "Neovim" :version "0.7.2"}
-    :initializationOptions {}
-    :processId 16245
-    :rootPath ROOT-PATH
-    :rootUri ROOT-URI
-    :trace "off"
-    :workspaceFolders [{:name ROOT-PATH
-                        :uri ROOT-URI}]})
 
 (local mt {})
-(fn create-client [?opts]
+(fn create-client [?opts ?provide-root-uri]
   (let [self (doto {:server [] :prev-id 1} (setmetatable mt))
+        params (or (?. ?opts :params)
+                   {:capabilities {:general {:positionEncodings [default-encoding]}}
+                    :clientInfo {:name "Neovim" :version "0.7.2"}
+                    :initializationOptions {}
+                    :processId 16245
+                    :rootPath (if ?provide-root-uri ROOT-PATH)
+                    :rootUri (if ?provide-root-uri ROOT-URI)
+                    :trace "off"
+                    :workspaceFolders (if ?provide-root-uri
+                                        [{:name ROOT-PATH
+                                          :uri ROOT-URI}])})
         initialize {:id 1
                     :jsonrpc "2.0"
                     :method "initialize"
-                    :params (or (?. ?opts :params) default-params)}
+                    : params}
         result (dispatch.handle* self.server initialize)]
     (case (?. ?opts :settings)
       settings

test/utils/init.fnl

@@ -34,10 +34,10 @@
     result))
 
 (fn create-client-with-files [file-contents ?client-options]
-  (let [file-contents (if (= (type file-contents) :string)
-                        {:main.fnl file-contents}
-                        file-contents)
-        self (create-client ?client-options)
+  (let [(?give-a-root-uri file-contents) (if (= (type file-contents) :string)
+                                           (values nil {:main.fnl file-contents})
+                                           (values true file-contents))
+        self (create-client ?client-options ?give-a-root-uri)
         locations []]
     (each [name marked (pairs file-contents)]
       (if (not= name :main.fnl)