Por qué elegimos Kotlin como uno de nuestros idiomas de destino. Parte 2: Multiplataforma Kotlin

Después de que el complemento kotlin haya recopilado para nosotros un montón de marcos diferentes para diferentes arquitecturas, creamos manualmente un nuevo marco universal en el que copiamos metadatos de cualquiera (en nuestro caso, tomamos arm64):

//add meta files (headers, modules and plist) from arm64 platform
task copyMeta() {
    dependsOn build

    doLast {
        copy {
            from("$buildDir/bin/iphone/main/release/framework/${frameworkName}.framework")
            into "$buildDir/iphone_universal/${frameworkName}.framework"
        }
    }
}

, , , . lipo, :

//merge binary files into one
task lipo(type: Exec) {
    dependsOn copyMeta

    def frameworks = files(
            "$buildDir/bin/iphone32/main/release/framework/${frameworkName}.framework/$frameworkName",
            "$buildDir/bin/iphone/main/release/framework/${frameworkName}.framework/$frameworkName",
            "$buildDir/bin/iphoneSim/main/release/framework/${frameworkName}.framework/$frameworkName"
    )
    def output = file("$buildDir/iphone_universal/${frameworkName}.framework/$frameworkName")
    inputs.files frameworks
    outputs.file output
    executable = 'lipo'
    args = frameworks.files
    args += ['-create', '-output', output]
}

, - Kotlin MPP Info.plist UIRequiredDeviceCapabilities, ( ). PlistBuddy:

//workaround
//remove UIRequiredDeviceCapabilities key from plist file (because we copy this file from arm64, only arm64 architecture was available)
task editPlistFile(type: Exec) {
    dependsOn lipo

    executable = "/bin/sh"
    def script = './scripts/edit_plist_file.sh'
    def command = "Delete :UIRequiredDeviceCapabilities"
    def file = "$buildDir/iphone_universal/${frameworkName}.framework/Info.plist"

    args += [script, command, file]
}

edit_plist_file.sh:

/usr/libexec/PlistBuddy -c "$1" "$2"

, zip ( podspec ):

task zipIosFramework(type: Zip) {
    dependsOn editPlistFile
    from "$buildDir/iphone_universal/"
    include '**/*'
    archiveName = iosArtifactName
    destinationDir(file("$buildDir/iphone_universal_zipped/"))
}

podspec :

task generatePodspecFile(type: Exec) {
    dependsOn zipIosFramework

    executable = "/bin/sh"

    def script = './scripts/generate_podspec_file.sh'

    def templateStr = "version_name"
    def sourceFile = './podspec/template.podspec'
    def replaceStr = "$version"

    args += [script, templateStr, replaceStr, sourceFile, generatedPodspecFile]
}

generate_podscpec_file.sh :

sed -e s/"$1"/"$2"/g <"$3" >"$4"

curl :

task uploadIosFrameworkToNexus(type: Exec) {
    dependsOn generatePodspecFile

    executable = "/bin/sh"
    def body = "-s -k -v --user \'$userName:$password\' " +
            "--upload-file $buildDir/iphone_universal_zipped/$iosArtifactName $iosUrlRepoPath"
    args += ['-c', "curl $body"]
}

task uploadPodspecFileToNexus(type: Exec) {
    dependsOn uploadIosFrameworkToNexus

    executable = "/bin/sh"
    def body = "-s -k -v --user \'$userName:$password\' " +
            "--upload-file $generatedPodspecFile $iosUrlRepoPath"
    args += ['-c', "curl $body"]
}

:

task createAndUploadUniversalIosFramework() {
    dependsOn uploadPodspecFileToNexus
    doLast {
        println 'createAndUploadUniversalIosFramework complete'
    }
}

Profit!