[ios, macos] Accept absolute file paths as style URLs (#6026)

It turns out that mbgl::AssetFileSource supports absolute file URLs in addition to relative file URLs. So replace the file: scheme with asset: while percent-escaping as necessary.

Also added amsterdam.geojson to macos.xcodeproj for consistency with ios.xcodeproj.

8 files changed, 73 insertions, 12 deletions

diff --git a/platform/darwin/src/NSURL+MGLAdditions.h b/platform/darwin/src/NSURL+MGLAdditions.h
new file mode 100644
index 0000000000..70fd79f064
--- /dev/null
+++ b/platform/darwin/src/NSURL+MGLAdditions.h
@@ -0,0 +1,17 @@
+#import <Foundation/Foundation.h>
+
+#import "MGLTypes.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface NSURL (MGLAdditions)
+
+/**
+ Returns the given URL, modified if necessary to use the asset: URL scheme
+ expected by mbgl for local requests.
+ */
+- (nullable NSURL *)mgl_URLByStandardizingScheme;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/platform/darwin/src/NSURL+MGLAdditions.m b/platform/darwin/src/NSURL+MGLAdditions.m
new file mode 100644
index 0000000000..11b84ed8fa
--- /dev/null
+++ b/platform/darwin/src/NSURL+MGLAdditions.m
@@ -0,0 +1,21 @@
+#import "NSURL+MGLAdditions.h"
+
+@implementation NSURL (MGLAdditions)
+
+- (nullable NSURL *)mgl_URLByStandardizingScheme {
+    if (!self.scheme) {
+        // Relative file URL, already escaped (in order to create the NSURL).
+        // Assume a relative path into the application’s resource folder.
+        return [NSURL URLWithString:[@"asset://" stringByAppendingString:self.absoluteString]];
+    } else if (self.fileURL) {
+        // Absolute file URL, so construct a new URL using the unescaped path.
+        NSURLComponents *components = [[NSURLComponents alloc] init];
+        components.scheme = @"asset";
+        components.host = @"";
+        components.path = self.path;
+        return components.URL;
+    }
+    return self;
+}
+
+@end
diff --git a/platform/ios/CHANGELOG.md b/platform/ios/CHANGELOG.md
index f9ea54f0cd..adb59898bd 100644
--- a/platform/ios/CHANGELOG.md
+++ b/platform/ios/CHANGELOG.md
@@ -10,6 +10,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 * Fixed an issue causing the wrong annotation view to be selected when tapping an annotation view with a center offset applied. ([#5931](https://github.com/mapbox/mapbox-gl-native/pull/5931))
 * Fixed an issue allowing annotation views to be assigned to polyline and polygon annotations. ([#5770](https://github.com/mapbox/mapbox-gl-native/pull/5770))
 * Per documentation, the first and last coordinates in an MGLPolygon must be identical in order for the polygon to draw correctly. The same is true for an MGLPolygon’s interior polygon. ([#5514](https://github.com/mapbox/mapbox-gl-native/pull/5514))
+* MGLMapView’s `styleURL` property can now be set to an absolute file URL. ([#6026](https://github.com/mapbox/mapbox-gl-native/pull/6026))
 * GeoJSON sources specified by the stylesheet at design time now support `cluster`, `clusterMaxZoom`, and `clusterRadius` attributes for clustering point features on the base map. ([#5724](https://github.com/mapbox/mapbox-gl-native/pull/5724))
 * Added [quadkey](https://msdn.microsoft.com/en-us/library/bb259689.aspx) support and limited WMS support in raster tile URL templates. ([#5628](https://github.com/mapbox/mapbox-gl-native/pull/5628))
 * Fixed rendering artifacts and missing glyphs that occurred after viewing a large number of CJK characters on the map. ([#5908](https://github.com/mapbox/mapbox-gl-native/pull/5908))
diff --git a/platform/ios/ios.xcodeproj/project.pbxproj b/platform/ios/ios.xcodeproj/project.pbxproj
index 61f61e970f..f822e587d4 100644
--- a/platform/ios/ios.xcodeproj/project.pbxproj
+++ b/platform/ios/ios.xcodeproj/project.pbxproj
@@ -53,6 +53,7 @@
 		35136D4F1D4277FC00C20EFD /* MGLSource.mm in Sources */ = {isa = PBXBuildFile; fileRef = 35136D4B1D4277FC00C20EFD /* MGLSource.mm */; };
 		35305D481D22AA680007D005 /* NSData+MGLAdditions.mm in Sources */ = {isa = PBXBuildFile; fileRef = 35305D471D22AA450007D005 /* NSData+MGLAdditions.mm */; };
 		35305D491D22AA680007D005 /* NSData+MGLAdditions.mm in Sources */ = {isa = PBXBuildFile; fileRef = 35305D471D22AA450007D005 /* NSData+MGLAdditions.mm */; };
+		35305D4A1D22AA6A0007D005 /* NSData+MGLAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 35305D461D22AA450007D005 /* NSData+MGLAdditions.h */; };
 		353349B31D5CC6F20094E9DE /* amsterdam.geojson in Resources */ = {isa = PBXBuildFile; fileRef = 353349B21D5CC6F20094E9DE /* amsterdam.geojson */; };
 		3534C7921D4BC95400D874A4 /* MGLStyleAttributeFunction_Private.hpp in Headers */ = {isa = PBXBuildFile; fileRef = 3534C7911D4BC95400D874A4 /* MGLStyleAttributeFunction_Private.hpp */; };
 		3534C7931D4BC95400D874A4 /* MGLStyleAttributeFunction_Private.hpp in Headers */ = {isa = PBXBuildFile; fileRef = 3534C7911D4BC95400D874A4 /* MGLStyleAttributeFunction_Private.hpp */; };
@@ -76,7 +77,6 @@
 		353933FC1D3FB7C0003F57D7 /* MGLRasterStyleLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = 353933FA1D3FB7C0003F57D7 /* MGLRasterStyleLayer.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		353933FE1D3FB7DD003F57D7 /* MGLSymbolStyleLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = 353933FD1D3FB7DD003F57D7 /* MGLSymbolStyleLayer.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		353933FF1D3FB7DD003F57D7 /* MGLSymbolStyleLayer.h in Headers */ = {isa = PBXBuildFile; fileRef = 353933FD1D3FB7DD003F57D7 /* MGLSymbolStyleLayer.h */; settings = {ATTRIBUTES = (Public, ); }; };
-		35305D4A1D22AA6A0007D005 /* NSData+MGLAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 35305D461D22AA450007D005 /* NSData+MGLAdditions.h */; };
 		353D23961D0B0DFE002BE09D /* MGLAnnotationViewTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 353D23951D0B0DFE002BE09D /* MGLAnnotationViewTests.m */; };
 		354D42DC1D4919F900F400A1 /* NSValue+MGLStyleAttributeAdditions_Private.hpp in Headers */ = {isa = PBXBuildFile; fileRef = 354D42DB1D4919F900F400A1 /* NSValue+MGLStyleAttributeAdditions_Private.hpp */; };
 		354D42DD1D4919F900F400A1 /* NSValue+MGLStyleAttributeAdditions_Private.hpp in Headers */ = {isa = PBXBuildFile; fileRef = 354D42DB1D4919F900F400A1 /* NSValue+MGLStyleAttributeAdditions_Private.hpp */; };
@@ -364,6 +364,11 @@
 		DAD165791CF4CDFF001FF4B9 /* MGLShapeCollection.h in Headers */ = {isa = PBXBuildFile; fileRef = DAD165761CF4CDFF001FF4B9 /* MGLShapeCollection.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		DAD1657A1CF4CDFF001FF4B9 /* MGLShapeCollection.m in Sources */ = {isa = PBXBuildFile; fileRef = DAD165771CF4CDFF001FF4B9 /* MGLShapeCollection.m */; };
 		DAD1657B1CF4CDFF001FF4B9 /* MGLShapeCollection.m in Sources */ = {isa = PBXBuildFile; fileRef = DAD165771CF4CDFF001FF4B9 /* MGLShapeCollection.m */; };
+		DAED385C1D62802D00D7640F /* amsterdam.geojson in Resources */ = {isa = PBXBuildFile; fileRef = 353349B21D5CC6F20094E9DE /* amsterdam.geojson */; };
+		DAED38631D62D0FC00D7640F /* NSURL+MGLAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = DAED38611D62D0FC00D7640F /* NSURL+MGLAdditions.h */; };
+		DAED38641D62D0FC00D7640F /* NSURL+MGLAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = DAED38611D62D0FC00D7640F /* NSURL+MGLAdditions.h */; };
+		DAED38651D62D0FC00D7640F /* NSURL+MGLAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = DAED38621D62D0FC00D7640F /* NSURL+MGLAdditions.m */; };
+		DAED38661D62D0FC00D7640F /* NSURL+MGLAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = DAED38621D62D0FC00D7640F /* NSURL+MGLAdditions.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -695,6 +700,8 @@
 		DAD1656B1CF41981001FF4B9 /* MGLFeature.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MGLFeature.mm; sourceTree = "<group>"; };
 		DAD165761CF4CDFF001FF4B9 /* MGLShapeCollection.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MGLShapeCollection.h; sourceTree = "<group>"; };
 		DAD165771CF4CDFF001FF4B9 /* MGLShapeCollection.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MGLShapeCollection.m; sourceTree = "<group>"; };
+		DAED38611D62D0FC00D7640F /* NSURL+MGLAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSURL+MGLAdditions.h"; sourceTree = "<group>"; };
+		DAED38621D62D0FC00D7640F /* NSURL+MGLAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSURL+MGLAdditions.m"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -1236,6 +1243,8 @@
 				DA8848161CBAFA6200AB86E3 /* NSProcessInfo+MGLAdditions.m */,
 				DA8848171CBAFA6200AB86E3 /* NSString+MGLAdditions.h */,
 				DA8848181CBAFA6200AB86E3 /* NSString+MGLAdditions.m */,
+				DAED38611D62D0FC00D7640F /* NSURL+MGLAdditions.h */,
+				DAED38621D62D0FC00D7640F /* NSURL+MGLAdditions.m */,
 				DA35A2C71CCAAAD200E826B2 /* NSValue+MGLAdditions.h */,
 				DA35A2C81CCAAAD200E826B2 /* NSValue+MGLAdditions.m */,
 			);
@@ -1335,6 +1344,7 @@
 				DA88483D1CBAFB8500AB86E3 /* MGLMapView+IBAdditions.h in Headers */,
 				DA17BE301CC4BAC300402C41 /* MGLMapView_Private.hpp in Headers */,
 				DAD165781CF4CDFF001FF4B9 /* MGLShapeCollection.h in Headers */,
+				DAED38631D62D0FC00D7640F /* NSURL+MGLAdditions.h in Headers */,
 				DA88481E1CBAFA6200AB86E3 /* MGLMultiPoint_Private.h in Headers */,
 				3566C7661D4A77BA008152BC /* MGLGeoJSONSource.h in Headers */,
 				35CE61821D4165D9004F2359 /* UIColor+MGLAdditions.hpp in Headers */,
@@ -1389,6 +1399,7 @@
 				350098BC1D480108004B2AF0 /* MGLVectorSource.h in Headers */,
 				353933FC1D3FB7C0003F57D7 /* MGLRasterStyleLayer.h in Headers */,
 				3566C76D1D4A8DFA008152BC /* MGLRasterSource.h in Headers */,
+				DAED38641D62D0FC00D7640F /* NSURL+MGLAdditions.h in Headers */,
 				35599DEC1D46F14E0048254D /* MGLStyleAttributeFunction.h in Headers */,
 				DABFB85E1CBE99E500D62B32 /* MGLAnnotation.h in Headers */,
 				350098D01D482E10004B2AF0 /* NSArray+MGLStyleAttributeAdditions_Private.hpp in Headers */,
@@ -1644,6 +1655,7 @@
 			files = (
 				DA25D5CD1CCDA11500607828 /* Settings.bundle in Resources */,
 				DA1DC9701CB6C6CE006E619F /* points.geojson in Resources */,
+				DAED385C1D62802D00D7640F /* amsterdam.geojson in Resources */,
 				DA1DC9711CB6C6CE006E619F /* polyline.geojson in Resources */,
 				DA1DC99D1CB6E076006E619F /* Default-568h@2x.png in Resources */,
 				DA821D071CCC6D59007508D4 /* Main.storyboard in Resources */,
@@ -1781,6 +1793,7 @@
 				DA88485D1CBAFB9800AB86E3 /* MGLUserLocationAnnotationView.m in Sources */,
 				3593E5231D529C29006D9365 /* MGLStyleAttribute.mm in Sources */,
 				350098B11D47E6F4004B2AF0 /* UIColor+MGLStyleAttributeAdditions.mm in Sources */,
+				DAED38651D62D0FC00D7640F /* NSURL+MGLAdditions.m in Sources */,
 				DAD165701CF41981001FF4B9 /* MGLFeature.mm in Sources */,
 				350098C31D48149E004B2AF0 /* NSNumber+MGLStyleAttributeAdditions.mm in Sources */,
 				40EDA1C11CFE0E0500D9EA68 /* MGLAnnotationContainerView.m in Sources */,
@@ -1843,6 +1856,7 @@
 				DAA4E4221CBB730400178DFB /* MGLPointAnnotation.m in Sources */,
 				3593E5241D529C29006D9365 /* MGLStyleAttribute.mm in Sources */,
 				350098B21D47E6F4004B2AF0 /* UIColor+MGLStyleAttributeAdditions.mm in Sources */,
+				DAED38661D62D0FC00D7640F /* NSURL+MGLAdditions.m in Sources */,
 				DAD165711CF41981001FF4B9 /* MGLFeature.mm in Sources */,
 				350098C41D48149E004B2AF0 /* NSNumber+MGLStyleAttributeAdditions.mm in Sources */,
 				40EDA1C21CFE0E0500D9EA68 /* MGLAnnotationContainerView.m in Sources */,
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index 113bd2cef6..766e7e64f0 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -36,6 +36,7 @@
 #import "NSProcessInfo+MGLAdditions.h"
 #import "NSException+MGLAdditions.h"
 #import "UIColor+MGLAdditions.hpp"
+#import "NSURL+MGLAdditions.h"
 #import "MGLUserLocationAnnotationView.h"
 #import "MGLUserLocation_Private.h"
 #import "MGLAnnotationImage_Private.h"
@@ -345,12 +346,7 @@ mbgl::Duration MGLDurationInSeconds(NSTimeInterval duration)
         styleURL = [MGLStyle streetsStyleURLWithVersion:MGLStyleDefaultVersion];
     }
 
-    if ( ! [styleURL scheme])
-    {
-        // Assume a relative path into the application bundle.
-        styleURL = [NSURL URLWithString:[@"asset://" stringByAppendingString:[styleURL absoluteString]]];
-    }
-
+    styleURL = styleURL.mgl_URLByStandardizingScheme;
     _mbglMap->setStyleURL([[styleURL absoluteString] UTF8String]);
 }
 
diff --git a/platform/macos/CHANGELOG.md b/platform/macos/CHANGELOG.md
index 067149fdb6..05227a4134 100644
--- a/platform/macos/CHANGELOG.md
+++ b/platform/macos/CHANGELOG.md
@@ -5,6 +5,7 @@
 * Fixed an issue causing code signing failures and bloating the framework. ([#5850](https://github.com/mapbox/mapbox-gl-native/pull/5850))
 * A new runtime styling API allows you to adjust the style and content of the base map dynamically. All the options available in [Mapbox Studio](https://www.mapbox.com/studio/) are now exposed via MGLStyle and subclasses of MGLStyleLayer and MGLSource. ([#5727](https://github.com/mapbox/mapbox-gl-native/pull/5727))
 * Added `showAnnotations:animated:` and `showAnnotations:edgePadding:animated:`, which moves the map viewport to show the specified annotations. ([#5749](https://github.com/mapbox/mapbox-gl-native/pull/5749))
+* MGLMapView’s `styleURL` property can now be set to an absolute file URL. ([#6026](https://github.com/mapbox/mapbox-gl-native/pull/6026))
 * GeoJSON sources specified by the stylesheet at design time now support `cluster`, `clusterMaxZoom`, and `clusterRadius` attributes for clustering point features on the base map. ([#5724](https://github.com/mapbox/mapbox-gl-native/pull/5724))
 * Fixed rendering artifacts and missing glyphs that occurred after viewing a large number of CJK characters on the map. ([#5908](https://github.com/mapbox/mapbox-gl-native/pull/5908))
 * Improved the precision of annotations at zoom levels greater than 18. ([#5517](https://github.com/mapbox/mapbox-gl-native/pull/5517))
diff --git a/platform/macos/macos.xcodeproj/project.pbxproj b/platform/macos/macos.xcodeproj/project.pbxproj
index 18a7f93232..181ed3fd64 100644
--- a/platform/macos/macos.xcodeproj/project.pbxproj
+++ b/platform/macos/macos.xcodeproj/project.pbxproj
@@ -166,6 +166,10 @@
 		DAE6C3D41CC34C9900DB3429 /* MGLOfflineRegionTests.m in Sources */ = {isa = PBXBuildFile; fileRef = DAE6C3CA1CC34BD800DB3429 /* MGLOfflineRegionTests.m */; };
 		DAE6C3D51CC34C9900DB3429 /* MGLOfflineStorageTests.m in Sources */ = {isa = PBXBuildFile; fileRef = DAE6C3CB1CC34BD800DB3429 /* MGLOfflineStorageTests.m */; };
 		DAE6C3D61CC34C9900DB3429 /* MGLStyleTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = DAE6C3CC1CC34BD800DB3429 /* MGLStyleTests.mm */; };
+		DAED385A1D627FF400D7640F /* amsterdam.geojson in Resources */ = {isa = PBXBuildFile; fileRef = DAED38591D627FF400D7640F /* amsterdam.geojson */; };
+		DAED385F1D62CED700D7640F /* NSURL+MGLAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = DAED385D1D62CED700D7640F /* NSURL+MGLAdditions.h */; };
+		DAED38601D62CED700D7640F /* NSURL+MGLAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = DAED385E1D62CED700D7640F /* NSURL+MGLAdditions.m */; };
+		DAED38671D62D2EB00D7640F /* amsterdam.geojson in Resources */ = {isa = PBXBuildFile; fileRef = DAED38591D627FF400D7640F /* amsterdam.geojson */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -384,6 +388,9 @@
 		DAE6C3CA1CC34BD800DB3429 /* MGLOfflineRegionTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = MGLOfflineRegionTests.m; path = ../../darwin/test/MGLOfflineRegionTests.m; sourceTree = "<group>"; };
 		DAE6C3CB1CC34BD800DB3429 /* MGLOfflineStorageTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = MGLOfflineStorageTests.m; path = ../../darwin/test/MGLOfflineStorageTests.m; sourceTree = "<group>"; };
 		DAE6C3CC1CC34BD800DB3429 /* MGLStyleTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; name = MGLStyleTests.mm; path = ../../darwin/test/MGLStyleTests.mm; sourceTree = "<group>"; };
+		DAED38591D627FF400D7640F /* amsterdam.geojson */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = amsterdam.geojson; sourceTree = "<group>"; };
+		DAED385D1D62CED700D7640F /* NSURL+MGLAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSURL+MGLAdditions.h"; sourceTree = "<group>"; };
+		DAED385E1D62CED700D7640F /* NSURL+MGLAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSURL+MGLAdditions.m"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -597,6 +604,7 @@
 		DA8F257D1D51C5F40010E6B5 /* Styling */ = {
 			isa = PBXGroup;
 			children = (
+				DAED38591D627FF400D7640F /* amsterdam.geojson */,
 				DA8F257C1D51C5F40010E6B5 /* Layers */,
 			);
 			name = Styling;
@@ -682,6 +690,8 @@
 				DAE6C3811CC31E2A00DB3429 /* NSProcessInfo+MGLAdditions.m */,
 				DAE6C3821CC31E2A00DB3429 /* NSString+MGLAdditions.h */,
 				DAE6C3831CC31E2A00DB3429 /* NSString+MGLAdditions.m */,
+				DAED385D1D62CED700D7640F /* NSURL+MGLAdditions.h */,
+				DAED385E1D62CED700D7640F /* NSURL+MGLAdditions.m */,
 				DA35A2CD1CCAAED300E826B2 /* NSValue+MGLAdditions.h */,
 				DA35A2CE1CCAAED300E826B2 /* NSValue+MGLAdditions.m */,
 			);
@@ -819,6 +829,7 @@
 				DAE6C35E1CC31E0400DB3429 /* MGLMultiPoint.h in Headers */,
 				35602BFF1D3EA9B40050646F /* MGLStyleLayer_Private.hpp in Headers */,
 				DAE6C3971CC31E2A00DB3429 /* NSBundle+MGLAdditions.h in Headers */,
+				DAED385F1D62CED700D7640F /* NSURL+MGLAdditions.h in Headers */,
 				DAD165741CF4CD7A001FF4B9 /* MGLShapeCollection.h in Headers */,
 				DA8F25AF1D51CB270010E6B5 /* NSString+MGLStyleAttributeAdditions.h in Headers */,
 				DAE6C3631CC31E0400DB3429 /* MGLPointAnnotation.h in Headers */,
@@ -1004,6 +1015,7 @@
 			files = (
 				DA839EA21CC2E3400062CAFB /* Assets.xcassets in Resources */,
 				DA839EA01CC2E3400062CAFB /* MapDocument.xib in Resources */,
+				DAED38671D62D2EB00D7640F /* amsterdam.geojson in Resources */,
 				DA839EA51CC2E3400062CAFB /* MainMenu.xib in Resources */,
 				DA5589771D320C41006B7F64 /* wms.json in Resources */,
 				DAE6C2E21CC304F900DB3429 /* Credits.rtf in Resources */,
@@ -1027,6 +1039,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				DAED385A1D627FF400D7640F /* amsterdam.geojson in Resources */,
 				DA2DBBCB1D51E30A00D38FF9 /* MGLStyleLayerTests.xib in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1085,6 +1098,7 @@
 				DAE6C3911CC31E2A00DB3429 /* MGLPolygon.mm in Sources */,
 				DAE6C39B1CC31E2A00DB3429 /* NSProcessInfo+MGLAdditions.m in Sources */,
 				DAE6C38F1CC31E2A00DB3429 /* MGLOfflineStorage.mm in Sources */,
+				DAED38601D62CED700D7640F /* NSURL+MGLAdditions.m in Sources */,
 				DAE6C3951CC31E2A00DB3429 /* MGLTilePyramidOfflineRegion.mm in Sources */,
 				3593E52B1D52A628006D9365 /* MGLStyleAttribute.mm in Sources */,
 				DAE6C3851CC31E2A00DB3429 /* MGLAccountManager.m in Sources */,
diff --git a/platform/macos/src/MGLMapView.mm b/platform/macos/src/MGLMapView.mm
index de127a7481..c3cd4ef7dd 100644
--- a/platform/macos/src/MGLMapView.mm
+++ b/platform/macos/src/MGLMapView.mm
@@ -38,6 +38,7 @@
 #import "NSException+MGLAdditions.h"
 #import "NSString+MGLAdditions.h"
 #import "NSColor+MGLAdditions.hpp"
+#import "NSURL+MGLAdditions.h"
 
 #import <QuartzCore/QuartzCore.h>
 
@@ -543,11 +544,7 @@ public:
         styleURL = [MGLStyle streetsStyleURLWithVersion:MGLStyleDefaultVersion];
     }
     
-    if (![styleURL scheme]) {
-        // Assume a relative path into the application’s resource folder.
-        styleURL = [NSURL URLWithString:[@"asset://" stringByAppendingString:styleURL.absoluteString]];
-    }
-    
+    styleURL = styleURL.mgl_URLByStandardizingScheme;
     _mbglMap->setStyleURL(styleURL.absoluteString.UTF8String);
 }