Add lint-staged to pre-commit

.husky/pre-commit

@@ -1,3 +1,4 @@
-npm run lint && \
-(cd components/dash-core-components && npm run lint) && \
-(cd components/dash-table && npm run lint)
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged

.lintstagedrc.js

@@ -0,0 +1,82 @@
+// .lintstagedrc.js
+const path = require("path");
+const fs = require('fs')
+
+// Helper to resolve path to venv executables
+const venvBin = (command) => {
+    let bin = "bin";
+    if (process.platform == "win32") {
+        bin = "Scripts";
+    }
+    if (fs.existsSync("venv")) {
+        return path.join("venv", bin, command);
+    }
+    if (fs.existsSync(".venv")) {
+        return path.join(".venv", bin, command);
+    }
+}
+
+module.exports = {
+    // Python checks (run from root, using root venv)
+    "*.py": (filenames) => [
+        `${venvBin("python")} -m pylint --rcfile=.pylintrc ${filenames.join(
+            " "
+        )}`, // Add your pylintrc if you have one
+        `${venvBin("flake8")} ${filenames.join(" ")}`,
+        `${venvBin("black")} --check ${filenames.join(" ")}`,
+    ],
+
+    // ESLint and Prettier for 'components/dash-core-components'
+    "components/dash-core-components/**/*.{js,jsx,ts,tsx}": (filenames) => {
+        const relativeFilePaths = filenames.map((f) =>
+            path.relative(path.join("components", "dash-core-components"), f)
+        );
+        return [
+            `cd components/dash-core-components && npx eslint --no-error-on-unmatched-pattern ${relativeFilePaths.join(
+                " "
+            )}`,
+            `cd components/dash-core-components && npx prettier --check ${relativeFilePaths.join(
+                " "
+            )}`,
+        ];
+    },
+
+    "components/dash-html-components/**/*.{js,jsx,ts,tsx}": (filenames) => {
+        const relativeFilePaths = filenames.map((f) =>
+            path.relative(path.join("components", "dash-html-components"), f)
+        );
+        return [
+            `cd components/dash-html-components && npx eslint --no-error-on-unmatched-pattern ${relativeFilePaths.join(
+                " "
+            )}`,
+        ];
+    },
+
+    "components/dash-table/**/*.{js,jsx,ts,tsx}": (filenames) => {
+        const relativeFilePaths = filenames.map((f) =>
+            path.relative(path.join("components", "dash-table"), f)
+        );
+        return [
+            `cd components/dash-table && npx eslint --no-error-on-unmatched-pattern ${relativeFilePaths.join(
+                " "
+            )}`,
+            `cd components/dash-table && npx prettier --check ${relativeFilePaths.join(
+                " "
+            )}`,
+        ];
+    },
+
+    "dash/dash-renderer/**/*.{js,jsx,ts,tsx}": (filenames) => {
+        const relativeFilePaths = filenames.map((f) =>
+            path.relative(path.join("dash", "dash-renderer"), f)
+        );
+        return [
+            `cd dash/dash-renderer && npx eslint --no-error-on-unmatched-pattern ${relativeFilePaths.join(
+                " "
+            )}`,
+            `cd dash/dash-renderer && npx prettier --check ${relativeFilePaths.join(
+                " "
+            )}`,
+        ];
+    },
+};