Fix getting linter version of npm plugin. (#804)

CHANGELOG.md

@@ -14,6 +14,7 @@ Note: Can be used with `megalinter/megalinter@beta` in your GitHub Action mega-l
 - Correct some broken links in `README` from "Mega-Linter" to "MegaLinter" (#1030)
 - Docker run -- clean-up containers when exits (#1033)
 - Add missing Bandit config file and rules path options (#679)
+- Fix getting linter version of npm plugin. (#845)
 
 - Linters
   - New linter `phplint` to speed-up linting of php files (#1031)

megalinter/Linter.py

@@ -696,9 +696,10 @@ def get_linter_version(self):
     def get_linter_version_output(self):
         command = self.build_version_command()
         logging.debug("Linter version command: " + str(command))
+        cwd = os.getcwd() if command[0] != "npm" else "~/"
         try:
             process = subprocess.run(
-                command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT
+                command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=cwd
             )
             return_code = process.returncode
             output = utils.decode_utf8(process.stdout)