Based on config useProjectCwd, set cwd to the project root

Author: Ted Behling

lib/main.js

@@ -27,6 +27,9 @@ export default {
       atom.config.observe('linter-shellcheck.userParameters', (value) => {
         this.userParameters = value.trim().split(' ').filter(Boolean);
       }),
+      atom.config.observe('linter-shellcheck.useProjectCwd', (value) => {
+        this.useProjectCwd = value;
+      }),
     );
   },
 
@@ -61,7 +64,8 @@ export default {
         }
 
         const text = textEditor.getText();
-        const cwd = path.dirname(filePath);
+        const projectPath = atom.project.relativizePath(filePath)[0];
+        const cwd = this.useProjectCwd && projectPath ? projectPath : path.dirname(filePath);
         const showAll = this.enableNotice;
         // The first -f parameter overrides any others
         const parameters = [].concat(['-f', 'gcc'], this.userParameters, ['-']);