Merge pull request #318 from SublimeLinter/auto-eslint_d

README.md

@@ -68,6 +68,20 @@ For [Svelte](https://svelte.dev/) `.svelte` files, using [`eslint-plugin-svelte3
 
 To find the `selector` value for a particular file type, place the cursor at the start of the file and use the command **Tools** ➡️ **Developer** ➡️ **Show Scope Name**.
 
+## Using eslint_d
+
+This plugin will automatically prefer a `eslint_d` installation if present.
+You can change this behavior by setting `prefer_eslint_d` to `false` either
+globally or per project.  E.g. for the global setting:
+
+```json
+"linters": {
+    "eslint": {
+        "prefer_eslint_d": false
+    }
+}
+```
+
 ## Settings
 
 - SublimeLinter settings: http://sublimelinter.com/en/latest/settings.html

linter.py

@@ -14,11 +14,17 @@
 import logging
 import os
 import re
+import shutil
 from SublimeLinter.lint import LintMatch, NodeLinter, PermanentError
 
 from SublimeLinter.lint.base_linter.node_linter import read_json_file
 
 
+MYPY = False
+if MYPY:
+    from typing import List, Union
+
+
 logger = logging.getLogger('SublimeLinter.plugin.eslint')
 
 
@@ -47,7 +53,8 @@ class ESLint(NodeLinter):
     line_col_base = (1, 1)
     defaults = {
         'selector': OPTIMISTIC_SELECTOR,
-        '--stdin-filename': '${file}'
+        '--stdin-filename': '${file}',
+        'prefer_eslint_d': True,
     }
 
     def run(self, cmd, code):
@@ -113,6 +120,21 @@ def ensure_plugin_installed(self) -> bool:
         self.notify_unassign()  # Abort linting without popping error dialog
         raise PermanentError()
 
+    def find_local_executable(self, start_dir, npm_name):
+        # type: (str, str) -> Union[None, str, List[str]]
+        """Automatically switch to `eslint_d` if available (and wanted)."""
+        executable = super().find_local_executable(start_dir, npm_name)
+        if self.settings.get('prefer_eslint_d') and isinstance(executable, str):
+            basedir = os.path.dirname(executable)
+            daemonized_name = '{}_d'.format(npm_name)
+            return (
+                (shutil.which(daemonized_name, path=basedir) if basedir else None)  # local
+                or self.which(daemonized_name)         # global
+                or executable                          # keep it
+            )
+
+        return executable
+
     def on_stderr(self, stderr):
         # Demote 'annoying' config is missing error to a warning.
         if self.missing_config_regex.match(stderr):

messages.json

@@ -1,4 +1,5 @@
 {
     "install": "messages/install.txt",
-    "4.2.0": "messages/4.2.0.txt"
+    "4.2.0": "messages/4.2.0.txt",
+    "4.3.0": "messages/4.3.0.txt"
 }

messages/4.3.0.txt

@@ -0,0 +1,16 @@
+SublimeLinter-eslint 4.3.0
+--------------------------
+
+SublimeLinter will now prefer a possible `eslint_d` installation (globally or
+locally) over the slower `eslint` binary automatically.
+
+You can control this behavior with the `prefer_eslint_d` setting.  For example,
+to turn this off in the global SublimeLinter settings:
+
+```json
+"linters": {
+    "eslint": {
+        "prefer_eslint_d": false
+    }
+}
+```