A diff for when LSP might remove the "syntaxes" key

[rwols]

I have a pull request for removing the "syntaxes" key over at the LSP package.

This helper package breaks when that PR is merged into master.
Please don't apply this patch until sublimelsp/LSP#931 is in the master branch (that could take a while, since ST4 isn't even out of alpha yet).

diff --git a/plugin.py b/plugin.py
index 3e68a56..31668e5 100644
--- a/plugin.py
+++ b/plugin.py
@@ -48,13 +48,7 @@ class LspMetalsPlugin(LanguageHandler):
             name=server_name,
             binary_args=launch_command,
             tcp_port=None,
-            languages=[
-                LanguageConfig(
-                    "scala",
-                    ["source.scala"],
-                    ["Packages/Scala/Scala.sublime-syntax"]
-                )
-            ],
+            languages=[LanguageConfig("scala")],
             enabled=True,
             init_options=dict(),
             settings=dict(),

[rwols]

This should work for both ST3 and ST4:

diff --git a/plugin.py b/plugin.py
index 626cc2d..7948d67 100644
--- a/plugin.py
+++ b/plugin.py
@@ -55,17 +55,21 @@ class LspMetalsPlugin(LanguageHandler):
         if java_path is None:
             sublime.error_message(missing_java_home)
 
+        try:
+            # ST4
+            language = LanguageConfig("scala")
+        except TypeError:
+            # ST3
+            language = LanguageConfig(
+                language_id="scala",
+                scopes=["source.scala"],
+                syntaxes=["Packages/Scala/Scala.sublime-syntax"])
+
         metals_config = ClientConfig(
             name=server_name,
             binary_args=launch_command,
             tcp_port=None,
-            languages=[
-                LanguageConfig(
-                    "scala",
-                    ["source.scala"],
-                    ["Packages/Scala/Scala.sublime-syntax"]
-                )
-            ],
+            languages=[language],
             enabled=True,
             init_options=dict(),
             settings=dict(),

[rwols]

You may want to apply this last patch because I merged the PR into st4000-exploration.