chore: 6.x build updates (#4228)

This runs the changelog generation on versioning automatically, if it isn't a pre-release.
It also runs the build and API docs generation on publish and makes sure that the generated API docs are in the published package.

.npmignore

@@ -3,3 +3,4 @@
 !dist/**
 !es5/**
 !src/css/**
+!docs/api/**

build/version.js

@@ -0,0 +1,20 @@
+var safeParse = require("safe-json-parse/tuple");
+var tuple = safeParse(process.env.npm_config_argv);
+var npm_config_argv = tuple[1]
+
+if (tuple[0]) {
+  process.exit(1);
+}
+
+var sh = require('shelljs');
+var version = process.env.npm_package_version;
+var prereleaseType = npm_config_argv['remain'][0];
+var approvedTypes = {
+  'major': 1,
+  'minor': 1,
+  'patch': 1
+}
+
+if (prereleaseType in approvedTypes) {
+  sh.exec('npm run changelog');
+}

package.json

@@ -32,8 +32,9 @@
     "docs:lint": "remark -- './**/*.md'",
     "docs:fix": "remark --output -- './**/*.md'",
     "babel": "babel src/js -d es5",
-    "prepublish": "not-in-install && npm run docs:api || in-install",
+    "prepublish": "not-in-install && run-p docs:api build || in-install",
-    "prepush": "npm run lint -- --errors"
+    "prepush": "npm run lint -- --errors",
+    "version": "node build/version.js && git add CHANGELOG.md"
   },
   "repository": {
     "type": "git",
@@ -111,6 +112,7 @@
     "lodash": "^4.16.6",
     "markdown-table": "^1.0.0",
     "npm-run": "^4.1.0",
+    "npm-run-all": "^4.0.2",
     "proxyquireify": "^3.0.0",
     "qunitjs": "1.23.1",
     "remark-cli": "^3.0.0",