From 228d1a7eb5f06ad82c0fdc2495eed9aa65c3fb6d Mon Sep 17 00:00:00 2001
From: Jason Wray <jason@mapbox.com>
Date: Tue, 2 Oct 2018 19:07:14 -0400
Subject: [ios, build] Check symbol namespacing for mapbox-events-ios

---
 Makefile                                     |  4 +++
 circle.yml                                   |  3 +++
 platform/ios/scripts/check-events-symbols.sh | 37 ++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100755 platform/ios/scripts/check-events-symbols.sh

diff --git a/Makefile b/Makefile
index cff9a28e8d..02ed977f0e 100644
--- a/Makefile
+++ b/Makefile
@@ -252,6 +252,10 @@ ios-sanitize-address: $(IOS_PROJ_PATH)
 ios-static-analyzer: $(IOS_PROJ_PATH)
 	set -o pipefail && $(IOS_XCODEBUILD_SIM) analyze -scheme 'CI' test $(XCPRETTY)
 
+.PHONY: ios-check-events-symbols
+ios-check-events-symbols:
+	./platform/ios/scripts/check-events-symbols.sh
+
 .PHONY: ipackage
 ipackage: ipackage*
 ipackage%:
diff --git a/circle.yml b/circle.yml
index 1def734e60..087418de3d 100644
--- a/circle.yml
+++ b/circle.yml
@@ -850,6 +850,9 @@ jobs:
       - build-ios-test
       - build-ios-integration-test
       - check-public-symbols
+      - run:
+          name: Check symbol namespacing for mapbox-events-ios
+          command: make ios-check-events-symbols
       - run:
           name: Lint plist files
           command: make ios-lint
diff --git a/platform/ios/scripts/check-events-symbols.sh b/platform/ios/scripts/check-events-symbols.sh
new file mode 100755
index 0000000000..c76d5e2693
--- /dev/null
+++ b/platform/ios/scripts/check-events-symbols.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+
+function step { >&2 echo -e "\033[1m\033[36m* $@\033[0m"; }
+function finish { >&2 echo -en "\033[0m"; }
+trap finish EXIT
+
+find_framework() {
+    step "Looking for Mapbox.framework…"
+    echo $( find ./build -name Mapbox | tail -n 1 )
+}
+
+FRAMEWORK=$(find_framework)
+
+if [[ -z "${FRAMEWORK}" || ! -f "${FRAMEWORK}" ]]; then
+    echo "No framework found — building dynamic Mapbox.framework…"
+    make iframework BUILD_DEVICE=false
+    FRAMEWORK=$(find_framework)
+fi
+
+echo "Found framework: ${FRAMEWORK}"
+
+step "Checking for un-namespaced symbols from mapbox-events-ios…"
+
+# Symbols from mapbox-events-ios are prefixed MME. To avoid duplicate symbol
+# warnings when multiple copes of mapbox-events-ios are included in a project,
+# the maps SDK prefixes these symbols with MGL_.
+SYMBOLS=$( nm "$FRAMEWORK" | grep \$_MME || true )
+
+if [ -z "${SYMBOLS}" ]; then
+    echo "✅ No un-namespaced symbols found."
+else
+    echo "❗️ Found un-namespaced symbols:"
+    echo "${SYMBOLS}"
+    exit 1
+fi
-- 
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