Add Gyp rules for Javascript-ifying the Emscripten engine

livecodefraser · livecodefraser · commit 44018eb99101 · 2015-07-02T12:08:59.000+01:00
diff --git a/engine/emscripten-javascriptify.sh b/engine/emscripten-javascriptify.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# This script runs the command that javascript-ifies the bitcode files produced
+# by the Emscripten compiler.
+
+set -e
+
+# Parameters:
+#	input:		bitcode file to javascriptify
+#	output:		the output HTML file
+#	exports:	JSON file containing list of exported functions
+#	whitelist:	JSON file containing list of emterpreted functions
+#	other args:	additional javascript libraries to include
+#
+input=$1
+output=$2
+exports=$3
+whitelist=$4
+shift 4
+
+for lib in $@ ; do
+  libs+=\ --js-library\ "${lib}"
+done
+
+
+emcc -O2 -g ${CFLAGS} \
+	"${input}" \
+	-o "${output}" \
+	-s EXPORTED_FUNCTIONS=@"${exports}" \
+	-s EMTERPRETIFY_WHITELIST=@"${whitelist}" \
+	-s ASSERTIONS=1 \
+	-s EMTERPRETIFY=1 \
+	-s EMTERPRETIFY_ASYNC=1 \
+	-s ALLOW_MEMORY_GROWTH=1 \
+	-s TOTAL_MEMORY=67108864 \
+	--preload-file boot \
+	${libs}
+
diff --git a/engine/engine.gyp b/engine/engine.gyp
@@ -367,6 +367,12 @@
 						},
 					},
 				],
+				[
+					'OS == "emscripten"',
+					{
+						'product_name': 'standalone-community.bc',
+					},
+				],
 			],
 			
 			'all_dependent_settings':
@@ -652,5 +658,56 @@
 				],
 			}
 		],
+		[
+			'OS == "emscripten"',
+			{
+				'targets':
+				[
+					{
+						'target_name': 'javascriptify',
+						'type': 'none',
+
+						'dependencies':
+						[
+							'standalone',
+						],
+
+						'actions':
+						[
+							{
+								'action_name': 'javascriptify',
+								'message': 'Javascript-ifying the Emscripten engine',
+
+								'inputs':
+								[
+									'<(PRODUCT_DIR)/standalone-community.bc',
+									'src/em-exported.json',
+									'src/em-whitelist.json',
+									'src/em-async.js',
+									'src/em-event.js',
+									'boot',
+								],
+
+								'outputs':
+								[
+									'<(PRODUCT_DIR)/standalone-community.html',
+								],
+
+								'action':
+								[
+									'./emscripten-javascriptify.sh',
+									'<(PRODUCT_DIR)/standalone-community.bc',
+									'<(PRODUCT_DIR)/standalone-community.html',
+									'src/em-exported.json',
+									'src/em-whitelist.json',
+									'src/em-async.js',
+									'src/em-event.js',
+								],
+							},
+						],
+					},
+				],
+			},
+		],
 	],
 }
diff --git a/livecode.gyp b/livecode.gyp
@@ -88,14 +88,23 @@
 					},
 				],
 				[
-					'OS != "android"',
+					'OS != "android" and OS != "emscripten"',
 					{
 						'dependencies':
 						[
 							'revpdfprinter/revpdfprinter.gyp:external-revpdfprinter',
 						],
 					},
 				],
+				[
+					'OS == "emscripten"',
+					{
+						'dependencies':
+						[
+							'engine/engine.gyp:javascriptify',
+						],
+					},
+				],
 			],
 		},
 		
