Automated docs updates via travis-ci

Uses the Python 3.5 build to generate the docs.
Then, if there are any changes, it pushes them
to the streamlink.github.io repo using a key
pair. The deploy-key.enc file here is the private
key of that pair. The public key was added to the
streamlink.github.io repo as a deploy key.

.travis.yml

@@ -2,22 +2,25 @@ language: python
 
 sudo: false
 
-python:
-  - "2.6"
-  - "2.7"
-  - "3.3"
-  - "3.4"
-  - "3.5"
+matrix:
+  include:
+  - python: "2.6"
+  - python: "2.7"
+  - python: "3.3"
+  - python: "3.4"
+  - python: "3.5"
+    env: BUILD_DOCS=yes
 
-before_install: 
+before_install:
   - pip install pytest pytest-cov coveralls coverage
   - travis_retry gem install --version 0.8.9 faraday
 
 install:
   - python setup.py install
 
-script: 
+script:
   - python -m pytest -vv --cov streamlink
+  - bash script/pushdocs.sh
 
 after_success:
   - sh .travis/build-win32.sh

script/makedocs.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 # Execute this at the base of the streamlink repo.
-# Requires: sphinx
 
 if [ "$#" -ne 1 ] ; then
     echo "Path to streamlink.github.io repo is required."
@@ -9,6 +8,7 @@ fi
 
 DOCS_REPO_PATH="$1"
 
+pip install sphinx
 make --directory=docs html
 
 # remove old files

script/pushdocs.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+if [ "$TRAVIS_BRANCH" != "master" ] || [ "$BUILD_DOCS" != "yes" ] ; then
+    exit 0
+fi
+
+DOCS_REPO_NAME="streamlink.github.io"
+DOCS_REPO_URL="git@github.com:streamlink/streamlink.github.io.git"
+DOCS_KEY="deploy-key"
+DOCS_USER="Travis CI"
+
+# deal with private key
+openssl aes-256-cbc -K $encrypted_25fada573976_key -iv $encrypted_25fada573976_iv -in "$DOCS_KEY.enc" -out "$DOCS_KEY" -d
+chmod 600 "$DOCS_KEY"
+eval `ssh-agent -s`
+ssh-add "$DOCS_KEY"
+
+# clone the repo
+git clone "$DOCS_REPO_URL" "$DOCS_REPO_NAME"
+bash script/makedocs.sh "$DOCS_REPO_NAME"
+
+# git config
+cd "$DOCS_REPO_NAME"
+git config user.name "$DOCS_USER"
+git config user.email "<>"
+git add --all
+# Check if anythhing changed, and if it's the case, push to origin/master.
+if git commit -m 'update docs' -m "Commit: https://github.com/sbstp/travis-test/commit/$TRAVIS_COMMIT" ; then
+    git push origin master
+fi
+
+exit 0