Specify that people need to install canary tag of gatsby-dev-cli (#763)

CONTRIBUTING.md

@@ -19,7 +19,7 @@ The usual contributing steps are:
 
 * Fork the [official repository](https://github.com/gatsbyjs/gatsby).
 * Clone your fork: git clone `git@github.com:<your-username>/gatsby.git`
-* Install yarn, lerna, and gatsby-dev-cli globaly: `npm install -g yarn lerna gatsby-dev-cli`
+* Install yarn, lerna, and gatsby-dev-cli globaly: `npm install -g yarn lerna gatsby-dev-cli@canary`
 * Checkout to the 1.0 branch: `git checkout 1.0`
 * Install dependencies: `yarn && lerna bootstrap`
 * Make sure tests are passing for you: `lerna run test`

packages/gatsby-dev-cli/bin/gatsby-dev

@@ -2,10 +2,17 @@
 
 const Configstore = require("configstore");
 const pkg = require("../package.json");
-var argv = require("yargs").array("packages").argv;
+const argv = require("yargs").array("packages").argv;
+const isAbsolute = require("is-absolute");
 
 const conf = new Configstore(pkg.name);
 
+// Test that the path is absolute
+if (argv.setPathToRepo && !isAbsolute(argv.setPathToRepo)) {
+  console.log("The path to the repo has to be absolute!");
+  process.exit();
+}
+
 if (argv.setPathToRepo) {
   console.log("Saving path to your Gatsby repo");
   conf.set("gatsby-location", argv.setPathToRepo);

packages/gatsby-dev-cli/package.json

@@ -3,6 +3,7 @@
     "chokidar": "^1.6.1",
     "configstore": "^3.0.0",
     "fs-extra": "^2.1.2",
+    "is-absolute": "^0.2.6",
     "lodash": "^4.17.4",
     "yargs": "^7.0.2"
   },

packages/gatsby-dev-cli/yarn.lock

@@ -688,6 +688,13 @@ invert-kv@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-1.0.0.tgz#104a8e4aaca6d3d8cd157a8ef8bfab2d7a3ffdb6"
 
+is-absolute@^0.2.6:
+  version "0.2.6"
+  resolved "https://registry.yarnpkg.com/is-absolute/-/is-absolute-0.2.6.tgz#20de69f3db942ef2d87b9c2da36f172235b1b5eb"
+  dependencies:
+    is-relative "^0.2.1"
+    is-windows "^0.2.0"
+
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -762,14 +769,30 @@ is-primitive@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
 
+is-relative@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/is-relative/-/is-relative-0.2.1.tgz#d27f4c7d516d175fb610db84bbeef23c3bc97aa5"
+  dependencies:
+    is-unc-path "^0.1.1"
+
 is-typedarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
 
+is-unc-path@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/is-unc-path/-/is-unc-path-0.1.2.tgz#6ab053a72573c10250ff416a3814c35178af39b9"
+  dependencies:
+    unc-path-regex "^0.1.0"
+
 is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
+is-windows@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-0.2.0.tgz#de1aa6d63ea29dd248737b69f1ff8b8002d2108c"
+
 isarray@1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
@@ -1371,6 +1394,10 @@ uid-number@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
 
+unc-path-regex@^0.1.0:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/unc-path-regex/-/unc-path-regex-0.1.2.tgz#e73dd3d7b0d7c5ed86fbac6b0ae7d8c6a69d50fa"
+
 unique-string@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unique-string/-/unique-string-1.0.0.tgz#9e1057cca851abb93398f8b33ae187b99caec11a"