feat: enable doc deployment on master pushes and install pygments lexer before build

util/deploy_docs_from_travis.sh

@@ -1,27 +1,34 @@
 #!/bin/bash
-
 set -e
 
+# Install the Wren Pygments lexer.
+cd util/pygments-lexer
+python setup.py develop
+cd ../..
+
+# Build the docs.
 make gh-pages
-# TODO: This strips the syntax highlighting because the custom pygments lexer
-# isn't installed.
 
-git clone https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG} gh-pages-repo
+# Clone the repo at the gh-pages branch.
+# TODO: Testing right now, so not using live branch.
+git clone https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG} gh-pages-repo \
+    --branch gh-pages-temp --depth 1
 cd gh-pages-repo
-git checkout gh-pages
 
+# Copy them into the gh-pages branch.
 rm -rf *
 cp -r ../build/gh-pages/* .
 
-# TODO: Restore CNAME file that gets deleted by `rm -rf *`.
+# Restore CNAME file that gets deleted by `rm -rf *`.
+echo "wren.io" > "CNAME"
 
 git status
 ls
 
 if ! $( git diff-index --quiet HEAD ) ; then
-	git config user.name "Travis CI"
-	git config user.email "$COMMIT_AUTHOR_EMAIL"
-	git add --all .
-	git commit -m "Deploy to GitHub Pages: ${SHA}"
-	git push
+  git config user.name "Travis CI"
+  git config user.email "$COMMIT_AUTHOR_EMAIL"
+  git add --all .
+  git commit -m "Deploy to GitHub Pages: ${SHA}"
+  git push
 fi