ci: replace Travis with GitHub Actions

Sync docs/conf.py with ndn-cxx

Change-Id: I2c7106ef52a0e7c00de6767c6b59dbd3ce1dc082
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index c020871..95dfe37 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -3,13 +3,13 @@
 
 if has OSX $NODE_LABELS; then
     FORMULAE=(boost openssl pkg-config)
-    if has OSX-10.13 $NODE_LABELS || has OSX-10.14 $NODE_LABELS; then
-        FORMULAE+=(python)
+    if [[ $JOB_NAME == *"Docs" ]]; then
+        FORMULAE+=(doxygen graphviz)
     fi
 
-    if [[ -n $TRAVIS ]]; then
-        # Travis images come with a large number of pre-installed
-        # brew packages, don't waste time upgrading all of them
+    if [[ -n $GITHUB_ACTIONS ]]; then
+        # GitHub Actions runners have a large number of pre-installed
+        # Homebrew packages. Don't waste time upgrading all of them.
         brew list --versions "${FORMULAE[@]}" || brew update
         for FORMULA in "${FORMULAE[@]}"; do
             brew list --versions "$FORMULA" || brew install "$FORMULA"
@@ -23,8 +23,23 @@
         brew cleanup
     fi
 
+    if [[ $JOB_NAME == *"Docs" ]]; then
+        pip3 install --upgrade --upgrade-strategy=eager sphinx sphinxcontrib-doxylink
+    fi
+
 elif has Ubuntu $NODE_LABELS; then
     sudo apt-get -qq update
     sudo apt-get -qy install build-essential pkg-config python3-minimal \
                              libboost-all-dev libssl-dev libsqlite3-dev
+
+    case $JOB_NAME in
+        *code-coverage)
+            sudo apt-get -qy install lcov python3-pip
+            pip3 install --user --upgrade --upgrade-strategy=eager 'gcovr~=5.0'
+            ;;
+        *Docs)
+            sudo apt-get -qy install doxygen graphviz python3-pip
+            pip3 install --user --upgrade --upgrade-strategy=eager sphinx sphinxcontrib-doxylink
+            ;;
+    esac
 fi