snap: add initial snapcraft config creation script

snap/README.md

@@ -0,0 +1,9 @@
+# Node.js Snap for https://snapcraft.io/
+
+> Snaps are containerised software packages that are simple to create and install. They auto-update and are safe to run. And because they bundle their dependencies, they work on all major Linux systems without modification.
+
+This is a work in progress, currently supporting Node.js Nightly versions, updated every 24 hours from the Node.js _master_ branch.
+
+1. **Install snapd on your distribution:** https://docs.snapcraft.io/core/install
+2. **Install Node.js Nightly**: `$ snap install node --edge`
+

snap/snapcraft.yaml.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+set -xe
+
+__dirname="$(CDPATH= cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# release
+#NODE_VERSION="9.4.0"
+#NODE_DISTTYPE="release"
+#NODE_TAG=""
+
+# nightly
+NODE_VERSION="$(curl -sL https://nodejs.org/download/nightly/index.tab | awk '/^v[1-9].*\Wsrc\W/ { print substr($1, 2); exit }')"
+NODE_DISTTYPE="nightly"
+NODE_TAG="v${NODE_VERSION}"
+
+envsubst << EOF > ${__dirname}/snapcraft.yaml
+name: node
+version: 'v${NODE_VERSION:0:30}'
+summary: Node.js
+description: |
+  A JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world. https://nodejs.org/
+
+grade: stable
+confinement: classic
+
+apps:
+  node:
+    command: bin/node
+  npm:
+    command: bin/npm
+  yarn:
+    command: bin/yarn.js
+
+parts:
+  node:
+    plugin: make
+    source-type: tar
+    source: https://nodejs.org/download/${NODE_DISTTYPE}/v${NODE_VERSION}/node-v${NODE_VERSION}.tar.gz
+    build-packages:
+      - g++
+      - make
+      - python2.7
+      - ccache
+    prepare: |
+      ./configure --prefix=/ --release-urlbase=https://nodejs.org/download/${NODE_DISTTYPE}/ --tag=${NODE_TAG}
+  yarn:
+    source-type: tar
+    source: https://yarnpkg.com/latest.tar.gz
+    plugin: dump
+EOF