Initial commit

plugin/__init__.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from LSP.plugin import register_plugin
+from LSP.plugin import unregister_plugin
+
+from .plugin import ScryerProlog
+
+__all__ = (
+    # ST: Core
+    "plugin_loaded",
+    "plugin_unloaded",
+)
+
+
+def plugin_loaded() -> None:
+    register_plugin(ScryerProlog)
+
+
+def plugin_unloaded() -> None:
+    unregister_plugin(ScryerProlog)

plugin/plugin.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from shutil import which
+
+from LSP.plugin import AbstractPlugin
+from LSP.plugin import ClientConfig
+from LSP.plugin import WorkspaceFolder
+import sublime
+
+
+class ScryerProlog(AbstractPlugin):
+    @classmethod
+    def name(cls) -> str:
+        return "prolog"
+
+    @classmethod
+    def can_start(
+        cls,
+        window: sublime.Window,
+        initiating_view: sublime.View,
+        workspace_folders: list[WorkspaceFolder],
+        configuration: ClientConfig,
+    ) -> str | None:
+        command = configuration.command[0] if configuration.command else "scryer-prolog"
+        binary = sublime.expand_variables(command, {"packages": sublime.packages_path()})
+        if which(binary):
+            return None
+        return (
+            f'Could not find "{command}" on your PATH. LSP-prolog requires a build of scryer-prolog with '
+            '"--lsp" support (see https://github.com/mthom/scryer-prolog). Install it, or set the "command" '
+            "setting in LSP-prolog.sublime-settings to the full path of the binary."
+        )