fix: support env.SUPPRESS_SUPPORT (#1334)

Show request for help once a week/install and support process.env.SUPPRESS_SUPPORT to hide entirely.

bin/postinstall.js

@@ -0,0 +1,29 @@
+#!/usr/bin/env node
+
+function main() {
+  if (process.env.SUPPRESS_SUPPORT) {
+    return;
+  }
+
+  try {
+    const Configstore = require('configstore');
+    const pkg = require(__dirname + '/../package.json');
+    const now = Date.now();
+
+    var week = 1000 * 60 * 60 * 24 * 7;
+
+    // create a Configstore instance with an unique ID e.g.
+    // Package name and optionally some default values
+    const conf = new Configstore(pkg.name);
+    const last = conf.get('lastCheck');
+
+    if (!last || now - week > last) {
+      console.log('\u001b[32mLove nodemon? You can now support the project via the open collective:\u001b[22m\u001b[39m\n > \u001b[96m\u001b[1mhttps://opencollective.com/nodemon/donate\u001b[0m\n');
+      conf.set('lastCheck', now);
+    }
+  } catch (e) {
+    console.log('\u001b[32mLove nodemon? You can now support the project via the open collective:\u001b[22m\u001b[39m\n > \u001b[96m\u001b[1mhttps://opencollective.com/nodemon/donate\u001b[0m\n');
+  }
+}
+
+main();

faq.md

@@ -40,6 +40,12 @@ For example, mocha@3.x will exit with `2` on failing tests. To handle the exit c
 nodemon -x 'mocha test/bad.test.js || exit 1'
 ```
 
+# You want to suppress the request for support message
+
+Perhaps you're [already supporting nodemon](https://opencollective.com/nodemon) or you're using it in CI and it needs to be quietened.
+
+Include the environment value of `SUPPRESS_SUPPORT=1`.
+
 # Can't install nodemon: permission issue
 
 You may need to install nodemon using `sudo` (which isn't recommended, but I understand it's unavoidable in some environments). If the install fails with this appearing in the npm error log, then you need the following workaround.

package.json

@@ -39,7 +39,7 @@
     "semantic-release": "semantic-release pre && npm publish && semantic-release post",
     "prepush": "npm run lint",
     "killall": "ps auxww | grep node | grep -v grep | awk '{ print $2 }' | xargs kill -9",
-    "postinstall": "node -e \"console.log('\\u001b[32mLove nodemon? You can now support the project via the open collective:\\u001b[22m\\u001b[39m\\n > \\u001b[96m\\u001b[1mhttps://opencollective.com/nodemon/donate\\u001b[0m\\n')\" || exit 0"
+    "postinstall": "node bin/postinstall || exit 0"
   },
   "devDependencies": {
     "@commitlint/cli": "^3.1.3",