Use Keith's magic library on macOS (#274)

Documentation/GettingStarted.md

@@ -31,11 +31,12 @@ mint install dduan/DrString
 
 For macOS and Ubuntu Bionic/Focal, you can download a package from a release.
 After unarchiving the package, the `drstring` binary should run without problems.
-Make sure all content of the archive stay in the same relative location when you
-move them. For example, if you move the executable to `FOO/bin/drstring`, the
-content in `lib/*` should be in `FOO/lib`.
 
-Note: if a parent process who calls `drstring` set the environment variable
+For Ubuntu, Make sure all content of the archive stay in the same relative 
+location when you move them. For example, if you move the executable to 
+`FOO/bin/drstring`, the content in `lib/*` should be in `FOO/lib`.
+
+If a parent process who calls `drstring` set the environment variable
 `LD_LIBRARY_PATH` on Linux, it may affect its successful execution. You must
 set `LD_LIBRARY_PATH` to the `lib` directory distributed with `drstring` in its
 execution environment to restore its functionality.

Package.swift

@@ -1,5 +1,10 @@
 // swift-tools-version:5.5
 import PackageDescription
+#if os(macOS)
+let magicLibrary = true
+#else
+let magicLibrary = false
+#endif
 
 let package = Package(
     name: "DrString",
@@ -106,7 +111,8 @@ let package = Package(
         ),
         .executableTarget(
             name: "DrStringCLI",
-            dependencies: ["DrStringCore"]
+            dependencies: ["DrStringCore"] + (magicLibrary ? ["lib_InternalSwiftSyntaxParser"] : []),
+            linkerSettings: (magicLibrary ? [.unsafeFlags(["-Xlinker", "-dead_strip_dylibs"])] : [])
         ),
         .testTarget(
             name: "ModelsTests",
@@ -145,5 +151,9 @@ let package = Package(
                 "Fixtures/",
             ]
         ),
-    ]
+    ] + (magicLibrary ? [.binaryTarget(
+        name: "lib_InternalSwiftSyntaxParser",
+        url: "https://github.com/keith/StaticInternalSwiftSyntaxParser/releases/download/5.6/lib_InternalSwiftSyntaxParser.xcframework.zip",
+        checksum: "88d748f76ec45880a8250438bd68e5d6ba716c8042f520998a438db87083ae9d"
+    )] : [])
 )

Scripts/package-darwin.sh

@@ -3,17 +3,11 @@
 set -euo pipefail
 
 BUILD_PATH=.build/apple/Products/Release
-LIB_PATH=$BUILD_PATH/lib
-BIN_PATH=$BUILD_PATH/bin
-COMPLETIONS_PATH=$BUILD_PATH/completions
+TEMP=$(mktemp -d)
+COMPLETIONS_PATH=$TEMP/completions
 ARCHIVE=drstring_darwin.tar.gz
-rm -rf $LIB_PATH
-rm -rf $BIN_PATH
 rm -rf $COMPLETIONS_PATH
-mkdir -p $LIB_PATH
-mkdir -p $BIN_PATH
 mkdir -p $COMPLETIONS_PATH
 cp -r Scripts/completions/* $COMPLETIONS_PATH
-cp $BUILD_PATH/drstring-cli $BIN_PATH/drstring
-cp $BUILD_PATH/lib_InternalSwiftSyntaxParser.dylib $LIB_PATH/lib_InternalSwiftSyntaxParser.dylib
-tar -C $BUILD_PATH -czf $ARCHIVE bin lib completions
+cp $BUILD_PATH/drstring-cli $TEMP/drstring
+tar -C $TEMP -czf $ARCHIVE drstring completions