How to Conditionally Define a Podspec Property Depending on Static or Dynamic Usage

Is there a way to conditionally define a Podspec property depending on static or dynamic usage?

I was able to use an Xcode environment variable (PACKAGE_TYPE) in conjunction with a pre-compilation Run Script build phase to dynamically produce a header to import, which in turn makes the correct generated Swift Header import.

generate-swift-import-header.sh

#!/bin/sh

[[ "${PACKAGE_TYPE}" = "com.apple.package-type.wrapper.framework" ]] \
    && SWIFTIMPORT="<${PRODUCT_MODULE_NAME}/${PRODUCT_MODULE_NAME}-Swift.h>" \
    || SWIFTIMPORT="\"${PRODUCT_MODULE_NAME}-Swift.h\""

if [ -z "$PODS_TARGET_SRCROOT" ]; then
    PODS_TARGET_SRCROOT=${SOURCE_ROOT}
    echo "Building in Xcode instead of CocoaPods. Overriding PODS_TARGET_SRCROOT with SOURCE_ROOT"
fi

_Import_text="
#ifndef GeneratedSwiftImport_h
#define GeneratedSwiftImport_h

#import ${SWIFTIMPORT}

#endif /* GeneratedSwiftImport_h */
"
echo "$_Import_text" > ${PODS_TARGET_SRCROOT}/Source/GeneratedSwiftImport.h

Podspec update

s.script_phases = { :name => "Generate UnzipKit Swift Header",
                    :script => "\"${PODS_TARGET_SRCROOT}\"/Scripts/generate-swift-import-header.sh",
                    :execution_position => :before_compile }

Library source

I replaced my conditional import with this:

#import "GeneratedSwiftImport.h"

I also ignored the GeneratedSwiftImport.h file in Git.

How to build dylib in XCode?

object files (.o) could be extracted from archive file (.a) and then packed in .dylib with libtool or gcc

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