Improve publishing experience

In preparation for publishing v4, I wanted to bring over some of the npm
scripts I had set up for react-with-styles. This should make publishing
the next version a bit smoother.

I also needed to make Karma run as a single run by default, so I added a
testonly:watch script that allows you to run it in non-single-run mode
if you like.

karma.conf.js

@@ -69,8 +69,7 @@ module.exports = function(config) {
     browsers: process.env.CONTINUOUS_INTEGRATION === 'true' ?
       ['Firefox'] : ['Chrome'],
 
-    // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
-    singleRun: process.env.CONTINUOUS_INTEGRATION === 'true'
+    singleRun: true,
   });
 };

package.json

@@ -11,11 +11,21 @@
   "bugs": "https://github.com/brigade/react-waypoint/issues",
   "scripts": {
     "build": "npm run clean && babel src/ -d build/",
+    "check-changelog": "expr $(git status --porcelain 2>/dev/null| grep \"^\\s*M.*CHANGELOG.md\" | wc -l) >/dev/null || (echo 'Please edit CHANGELOG.md' && exit 1)",
+    "check-only-changelog-changed": "(expr $(git status --porcelain 2>/dev/null| grep -v \"CHANGELOG.md\" | wc -l) >/dev/null && echo 'Only CHANGELOG.md may have uncommitted changes' && exit 1) || exit 0",
     "clean": "rimraf build",
     "lint": "eslint . --ext .js,.jsx",
-    "prepublish": "in-publish && npm run build || not-in-publish",
-    "test": "npm run lint && npm run testonly",
-    "testonly": "karma start"
+    "postversion": "git commit package.json CHANGELOG.md -m \"Version $npm_package_version\" && npm run tag && git push && git push --tags && npm publish",
+    "prepublish": "in-publish && safe-publish-latest && npm run build || not-in-publish",
+    "pretest": "npm run --silent lint",
+    "preversion": "npm run test && npm run check-changelog && npm run check-only-changelog-changed",
+    "tag": "git tag v$npm_package_version",
+    "test": "npm run testonly",
+    "testonly": "karma start --single-run",
+    "testonly:watch": "karma start --no-single-run",
+    "version:major": "npm --no-git-tag-version version major",
+    "version:minor": "npm --no-git-tag-version version minor",
+    "version:patch": "npm --no-git-tag-version version patch"
   },
   "author": "Brigade Engineering",
   "license": "MIT",
@@ -44,6 +54,7 @@
     "react": "^15.0.0",
     "react-dom": "^15.0.0",
     "rimraf": "^2.5.2",
+    "safe-publish-latest": "^1.1.1",
     "webpack": "^1.5.3"
   },
   "keywords": [