[ios, build] Install cocoapods as a deployment dependency

platform/ios/scripts/install-packaging-dependencies.sh

@@ -2,7 +2,9 @@
 
 set -euo pipefail
 
+COCOAPODS_VERSION="1.7.5"
 JAZZY_VERSION="0.10.0"
+CIRCLECI=${CIRCLECI:-false}
 
 function step { >&2 echo -e "\033[1m\033[36m* $@\033[0m"; }
 function finish { >&2 echo -en "\033[0m"; }
@@ -10,18 +12,50 @@ trap finish EXIT
 
 step "Installing packaging dependencies…"
 
+##
+## aws
+##
 if [ -z `which aws` ]; then
     brew install awscli
+else
+    echo "Found awscli"
 fi
 
+##
+## wget
+##
 if [ -z `which wget` ]; then
     brew install wget
+else
+    echo "Found brew"
 fi
 
+##
+## cocoapods
+##
+if [[ -z `which pod` || $(pod --version) != "${COCOAPODS_VERSION}" ]]; then
+    step "Installing cocoapods…"
+
+    if [[ "${CIRCLECI}" == true ]]; then
+        sudo gem install cocoapods -v $COCOAPODS_VERSION --no-document
+    else
+        gem install cocoapods -v $COCOAPODS_VERSION --no-document
+    fi
+
+    if [ -z `which pod` ]; then
+        echo "Unable to install cocoapods ($COCOAPODS_VERSION)."
+        exit 1
+    fi
+else
+    echo "Found cocoapods (${COCOAPODS_VERSION})"
+fi
+
+##
+## jazzy
+##
 if [[ -z `which jazzy` || $(jazzy -v) != "jazzy version: ${JAZZY_VERSION}" ]]; then
     step "Installing jazzy…"
 
-    CIRCLECI=${CIRCLECI:-false}
     if [[ "${CIRCLECI}" == true ]]; then
         sudo gem install jazzy -v $JAZZY_VERSION --no-document -- --with-sqlite3-lib=/usr/lib
     else
@@ -32,4 +66,8 @@ if [[ -z `which jazzy` || $(jazzy -v) != "jazzy version: ${JAZZY_VERSION}" ]]; t
         echo "Unable to install jazzy ($JAZZY_VERSION). See https://github.com/mapbox/mapbox-gl-native/blob/master/platform/ios/INSTALL.md"
         exit 1
     fi
+else
+    echo "Found jazzy (${JAZZY_VERSION})"
 fi
+
+step "Finished installing packaging dependencies"