Pass through SwiftUI Preview thunk compilation

Author: brentleyjones

examples/ios_app/test/fixtures/bwb.xcodeproj/rules_xcodeproj/bazel/ld.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+passthrough_args=("${@:1}")
+
 while test $# -gt 0
 do
   case $1 in
@@ -10,7 +12,19 @@ do
     printf "\0%s\0" "$ld_version" > "$1"
     break
     ;;
-  esac
 
+  -isysroot)
+    shift
+    # PATH/DEVELOPER_DIR isn't set when this is called, so we need to calculate
+    # the developer dir from the sysroot to invoke clang (used below)
+    developer_dir="${1/\/Platforms\/*/}"
+    ;;
+
+  *.preview-thunk.dylib)
+    # Pass through for SwiftUI Preview thunk compilation
+    shift
+    exec "$developer_dir/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" "${passthrough_args[@]}"
+    ;;
+  esac
   shift
 done

examples/ios_app/test/fixtures/bwb.xcodeproj/rules_xcodeproj/bazel/swiftc.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import subprocess
 import sys
 from typing import List
 
@@ -10,6 +11,11 @@ def _main() -> None:
         os.system("swiftc -v")
         return
 
+    # Pass through for SwiftUI Preview thunk compilation
+    if (any(arg.endswith(".preview-thunk.swift") for arg in sys.argv) and
+        "-output-file-map" not in sys.argv):
+        exit(subprocess.run(["swiftc"] + sys.argv[1:], check=False).returncode)
+
     _touch_deps_files(sys.argv)
 
 

test/fixtures/cc/bwb.xcodeproj/rules_xcodeproj/bazel/ld.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+passthrough_args=("${@:1}")
+
 while test $# -gt 0
 do
   case $1 in
@@ -10,7 +12,19 @@ do
     printf "\0%s\0" "$ld_version" > "$1"
     break
     ;;
-  esac
 
+  -isysroot)
+    shift
+    # PATH/DEVELOPER_DIR isn't set when this is called, so we need to calculate
+    # the developer dir from the sysroot to invoke clang (used below)
+    developer_dir="${1/\/Platforms\/*/}"
+    ;;
+
+  *.preview-thunk.dylib)
+    # Pass through for SwiftUI Preview thunk compilation
+    shift
+    exec "$developer_dir/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" "${passthrough_args[@]}"
+    ;;
+  esac
   shift
 done

test/fixtures/cc/bwb.xcodeproj/rules_xcodeproj/bazel/swiftc.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import subprocess
 import sys
 from typing import List
 
@@ -10,6 +11,11 @@ def _main() -> None:
         os.system("swiftc -v")
         return
 
+    # Pass through for SwiftUI Preview thunk compilation
+    if (any(arg.endswith(".preview-thunk.swift") for arg in sys.argv) and
+        "-output-file-map" not in sys.argv):
+        exit(subprocess.run(["swiftc"] + sys.argv[1:], check=False).returncode)
+
     _touch_deps_files(sys.argv)
 
 

test/fixtures/command_line/bwb.xcodeproj/rules_xcodeproj/bazel/ld.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+passthrough_args=("${@:1}")
+
 while test $# -gt 0
 do
   case $1 in
@@ -10,7 +12,19 @@ do
     printf "\0%s\0" "$ld_version" > "$1"
     break
     ;;
-  esac
 
+  -isysroot)
+    shift
+    # PATH/DEVELOPER_DIR isn't set when this is called, so we need to calculate
+    # the developer dir from the sysroot to invoke clang (used below)
+    developer_dir="${1/\/Platforms\/*/}"
+    ;;
+
+  *.preview-thunk.dylib)
+    # Pass through for SwiftUI Preview thunk compilation
+    shift
+    exec "$developer_dir/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" "${passthrough_args[@]}"
+    ;;
+  esac
   shift
 done

test/fixtures/command_line/bwb.xcodeproj/rules_xcodeproj/bazel/swiftc.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import subprocess
 import sys
 from typing import List
 
@@ -10,6 +11,11 @@ def _main() -> None:
         os.system("swiftc -v")
         return
 
+    # Pass through for SwiftUI Preview thunk compilation
+    if (any(arg.endswith(".preview-thunk.swift") for arg in sys.argv) and
+        "-output-file-map" not in sys.argv):
+        exit(subprocess.run(["swiftc"] + sys.argv[1:], check=False).returncode)
+
     _touch_deps_files(sys.argv)
 
 

test/fixtures/generator/bwb.xcodeproj/rules_xcodeproj/bazel/ld.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+passthrough_args=("${@:1}")
+
 while test $# -gt 0
 do
   case $1 in
@@ -10,7 +12,19 @@ do
     printf "\0%s\0" "$ld_version" > "$1"
     break
     ;;
-  esac
 
+  -isysroot)
+    shift
+    # PATH/DEVELOPER_DIR isn't set when this is called, so we need to calculate
+    # the developer dir from the sysroot to invoke clang (used below)
+    developer_dir="${1/\/Platforms\/*/}"
+    ;;
+
+  *.preview-thunk.dylib)
+    # Pass through for SwiftUI Preview thunk compilation
+    shift
+    exec "$developer_dir/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" "${passthrough_args[@]}"
+    ;;
+  esac
   shift
 done

test/fixtures/generator/bwb.xcodeproj/rules_xcodeproj/bazel/swiftc.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import subprocess
 import sys
 from typing import List
 
@@ -10,6 +11,11 @@ def _main() -> None:
         os.system("swiftc -v")
         return
 
+    # Pass through for SwiftUI Preview thunk compilation
+    if (any(arg.endswith(".preview-thunk.swift") for arg in sys.argv) and
+        "-output-file-map" not in sys.argv):
+        exit(subprocess.run(["swiftc"] + sys.argv[1:], check=False).returncode)
+
     _touch_deps_files(sys.argv)
 
 

test/fixtures/multiplatform/bwb.xcodeproj/rules_xcodeproj/bazel/ld.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+passthrough_args=("${@:1}")
+
 while test $# -gt 0
 do
   case $1 in
@@ -10,7 +12,19 @@ do
     printf "\0%s\0" "$ld_version" > "$1"
     break
     ;;
-  esac
 
+  -isysroot)
+    shift
+    # PATH/DEVELOPER_DIR isn't set when this is called, so we need to calculate
+    # the developer dir from the sysroot to invoke clang (used below)
+    developer_dir="${1/\/Platforms\/*/}"
+    ;;
+
+  *.preview-thunk.dylib)
+    # Pass through for SwiftUI Preview thunk compilation
+    shift
+    exec "$developer_dir/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" "${passthrough_args[@]}"
+    ;;
+  esac
   shift
 done

test/fixtures/multiplatform/bwb.xcodeproj/rules_xcodeproj/bazel/swiftc.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import subprocess
 import sys
 from typing import List
 
@@ -10,6 +11,11 @@ def _main() -> None:
         os.system("swiftc -v")
         return
 
+    # Pass through for SwiftUI Preview thunk compilation
+    if (any(arg.endswith(".preview-thunk.swift") for arg in sys.argv) and
+        "-output-file-map" not in sys.argv):
+        exit(subprocess.run(["swiftc"] + sys.argv[1:], check=False).returncode)
+
     _touch_deps_files(sys.argv)