Simplify Travis config and fix release process

.travis.yml

-os:
-  - linux
-  - osx
 sudo: false
 before_install:
   - export BUNDLE_GEMFILE=$PWD/Gemfile
   - export TRAVIS_RUBY_VERSION="$(ruby -e 'puts RUBY_VERSION')-travis"
-  - script/bootstrap
   - export PATH=~/bin:"$PATH"
 language: go
 go:
   - 1.6.3
 script: make test-all
-install: script/cached-bundle install --without development --deployment --jobs=3 --retry=3
+install: script/bootstrap
 after_success: script/publish-release
-notifications:
-  email: false
 env:
   global:
     - AMAZON_S3_BUCKET=ci-cache

script/bootstrap

 #!/usr/bin/env bash
 set -e
 
-if [ -n "$TRAVIS" ]; then
+if [ -n "$TRAVIS" ] && [ ! -x ~/bin/tmux ]; then
   case "$TRAVIS_OS_NAME" in
     linux ) cache_name="tmux-zsh.ubuntu" ;;
     osx ) cache_name="tmux.osx" ;;
@@ -12,7 +12,6 @@ if [ -n "$TRAVIS" ]; then
   esac
 
   curl -fsSL "https://${AMAZON_S3_BUCKET}.s3.amazonaws.com/${cache_name}.tgz" | tar -xz -C ~
-  exit 0
 fi
 
 STATUS=0
@@ -23,7 +22,11 @@ if ! go version; then
 fi
 
 { ruby --version
-  bundle install --path vendor/bundle
+  if [ -n "$TRAVIS" ]; then
+    script/cached-bundle install --deployment --jobs=3 --retry=3
+  else
+    bundle install --path vendor/bundle
+  fi
   bundle binstub cucumber ronn --path bin
 } || {
   echo "You need Ruby 1.9 or higher and Bundler to run hub tests" >&2

script/cached-bundle

@@ -31,15 +31,17 @@ bundle_path="vendor/bundle"
 gemfile_hash="$(compute_md5 <"${BUNDLE_GEMFILE:-Gemfile}.lock")"
 cache_name="${TRAVIS_RUBY_VERSION}-${gemfile_hash}.${TRAVIS_OS_NAME}.tgz"
 fetch_url="http://${AMAZON_S3_BUCKET}.s3.amazonaws.com/${TRAVIS_REPO_SLUG}/${cache_name}"
+bundle_log="$(mktemp /tmp/bundle.XXXX)"
 
 if download "$fetch_url" "$cache_name"; then
   echo "Reusing cached bundle ${cache_name}"
   tar xzf "$cache_name"
 fi
 
-bundle "$@"
+set -o pipefail
+bundle "$@" | tee "$bundle_log"
 
-if [ ! -f "$cache_name" ] && [ -n "$AMAZON_SECRET_ACCESS_KEY" ]; then
+if grep -q '^Installing' "$bundle_log" && [ -n "$AMAZON_SECRET_ACCESS_KEY" ]; then
   echo "Caching \`${bundle_path}' to S3"
   tar czf "$cache_name" "$bundle_path"
   script/s3-put "$cache_name" "${AMAZON_S3_BUCKET}:${TRAVIS_REPO_SLUG}/${cache_name}"

script/publish-release

@@ -4,5 +4,6 @@ set -e
 if [[ $TRAVIS_TAG == v* ]] && [ "$TRAVIS_OS_NAME" = "linux" ] && [ -n "$GITHUB_OAUTH" ]; then
   version="${TRAVIS_TAG#v}"
   make man-pages
-  script/cross-compile "$version" | script/github-release hub "$version"
+  script/cross-compile "$version" | \
+    PATH="bin:$PATH" script/github-release hub "$version"
 fi