Add pre-commit.

.gitignore

@@ -1 +1,2 @@
 tab*
+.tox

.jshintrc

@@ -0,0 +1,3 @@
+{
+    "esversion": 6
+}

.pre-commit-config.yaml

@@ -0,0 +1,35 @@
+-   repo: git://github.com/pre-commit/pre-commit-hooks.git
+    sha: 6b1aa19425b35f8c34f43ada8f1045b028dc19a5
+    hooks:
+    -   id: autopep8-wrapper
+        args:
+        - --in-place
+        - --aggressive
+        - --aggressive
+        - --max-line-length=131
+    -   id: check-ast
+    -   id: check-case-conflict
+    -   id: check-docstring-first
+    -   id: check-json
+        files: \.(jshintrc|json)$
+    -   id: debug-statements
+    -   id: double-quote-string-fixer
+    -   id: end-of-file-fixer
+    -   id: fix-encoding-pragma
+    -   id: flake8
+        args:
+        - --max-line-length=131
+        - --ignore=E126,E128,E731
+    -   id: pretty-format-json
+        args:
+        - --autofix
+        - --indent
+        - '4'
+    -   id: requirements-txt-fixer
+    -   id: trailing-whitespace
+-   repo: git://github.com/pre-commit/mirrors-jshint
+    sha: 431358a85a3084cb86d731f2cd46490ec04f5c69
+    hooks:
+    -   id: jshint
+        args:
+        - --config=.jshintrc

Makefile

@@ -0,0 +1,13 @@
+.PHONY: pre-commit clean test
+
+pre-commit:
+	@tox -e pre-commit -- install -f --install-hooks
+
+test: pre-commit
+	@tox -e pre-commit -- run --all-files
+	@tox
+
+clean:
+	@rm -fr .tox
+	@find . -name '*.py[co]' -delete
+	@find . -name '__pycache__' -delete

tox.ini

@@ -0,0 +1,9 @@
+[tox]
+envlist = py27,py35
+skipsdist = true
+
+[testenv:pre-commit]
+deps =
+    pre-commit
+commands =
+    pre-commit {posargs}