bdk-ffi/buildSrc/src/main/kotlin/org/bitcoindevkit/plugins/generate-jvm-bindings.gradle.kts

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package org.bitcoindevkit.plugins
// register a task called buildJvmBinaries which will run something like
// cargo build --release --target aarch64-apple-darwin
val buildJvmBinaries by tasks.register<DefaultTask>("buildJvmBinaries") {
if (operatingSystem == OS.MAC) {
exec {
workingDir("${project.projectDir}/../bdk-ffi")
executable("cargo")
val cargoArgs: List<String> = listOf("build", "--release", "--target", "x86_64-apple-darwin")
args(cargoArgs)
}
exec {
workingDir("${project.projectDir}/../bdk-ffi")
executable("cargo")
val cargoArgs: List<String> = listOf("build", "--release", "--target", "aarch64-apple-darwin")
args(cargoArgs)
}
} else if(operatingSystem == OS.LINUX) {
exec {
workingDir("${project.projectDir}/../bdk-ffi")
executable("cargo")
val cargoArgs: List<String> = listOf("build", "--release", "--target", "x86_64-unknown-linux-gnu")
args(cargoArgs)
}
}
}
// move the native libs build by cargo from bdk-ffi/target/.../release/
// to their place in the bdk-jvm library
val moveNativeJvmLibs by tasks.register<DefaultTask>("moveNativeJvmLibs") {
// dependsOn(buildJvmBinaryX86_64MacOS, buildJvmBinaryAarch64MacOS, buildJvmBinaryLinux)
dependsOn(buildJvmBinaries)
data class CopyMetadata(val targetDir: String, val resDir: String, val ext: String)
val libsToCopy: MutableList<CopyMetadata> = mutableListOf()
if (operatingSystem == OS.MAC) {
libsToCopy.add(
CopyMetadata(
targetDir = "aarch64-apple-darwin",
resDir = "darwin-aarch64",
ext = "dylib"
)
)
libsToCopy.add(
CopyMetadata(
targetDir = "x86_64-apple-darwin",
resDir = "darwin-x86-64",
ext = "dylib"
)
)
} else if (operatingSystem == OS.LINUX) {
libsToCopy.add(
CopyMetadata(
targetDir = "x86_64-unknown-linux-gnu",
resDir = "linux-x86-64",
ext = "so"
)
)
}
libsToCopy.forEach {
doFirst {
copy {
with(it) {
from("${project.projectDir}/../bdk-ffi/target/${this.targetDir}/release/libbdkffi.${this.ext}")
into("${project.projectDir}/../jvm/src/main/resources/${this.resDir}/")
}
}
}
}
}
// generate the bindings using the bdk-ffi-bindgen tool created in the bdk-ffi submodule
val generateJvmBindings by tasks.register<Exec>("generateJvmBindings") {
dependsOn(moveNativeJvmLibs)
workingDir("${project.projectDir}/../bdk-ffi")
executable("cargo")
args("run", "--package", "bdk-ffi-bindgen", "--", "--language", "kotlin", "--out-dir", "../jvm/src/main/kotlin")
doLast {
println("JVM bindings file successfully created")
}
}
// we need an aggregate task which will run the 3 required tasks to build the JVM libs in order
// the task will also appear in the printout of the ./gradlew tasks task with a group and description
tasks.register("buildJvmLib") {
group = "Bitcoindevkit"
description = "Aggregate task to build JVM library"
dependsOn(
buildJvmBinaries,
moveNativeJvmLibs,
generateJvmBindings
)
}