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#![doc = include_str!("../README.md")]
#![warn(clippy::pedantic)]
#![warn(unused_crate_dependencies)]
#![allow(clippy::module_name_repetitions)]
pub mod build;
pub mod config;
pub mod cross_compile;
use crate::build::BuildpackBinaries;
use libcnb_data::buildpack::SingleBuildpackDescriptor;
use std::fs;
use std::path::{Path, PathBuf};
#[derive(Copy, Clone)]
pub enum CargoProfile {
Dev,
Release,
}
pub fn read_buildpack_data(
project_path: impl AsRef<Path>,
) -> Result<BuildpackData<Option<toml::Value>>, BuildpackDataError> {
let buildpack_descriptor_path = project_path.as_ref().join("buildpack.toml");
fs::read_to_string(&buildpack_descriptor_path)
.map_err(BuildpackDataError::IoError)
.and_then(|file_contents| {
toml::from_str(&file_contents).map_err(BuildpackDataError::DeserializationError)
})
.map(|buildpack_descriptor| BuildpackData {
buildpack_descriptor_path,
buildpack_descriptor,
})
}
#[derive(Debug)]
pub enum BuildpackDataError {
IoError(std::io::Error),
DeserializationError(toml::de::Error),
}
pub struct BuildpackData<BM> {
pub buildpack_descriptor_path: PathBuf,
pub buildpack_descriptor: SingleBuildpackDescriptor<BM>,
}
pub fn assemble_buildpack_directory(
destination_path: impl AsRef<Path>,
buildpack_descriptor_path: impl AsRef<Path>,
buildpack_binaries: &BuildpackBinaries,
) -> std::io::Result<()> {
fs::create_dir_all(destination_path.as_ref())?;
fs::copy(
buildpack_descriptor_path.as_ref(),
destination_path.as_ref().join("buildpack.toml"),
)?;
let bin_path = destination_path.as_ref().join("bin");
fs::create_dir_all(&bin_path)?;
fs::copy(
&buildpack_binaries.buildpack_target_binary_path,
bin_path.join("build"),
)?;
create_file_symlink("build", bin_path.join("detect"))?;
if !buildpack_binaries.additional_target_binary_paths.is_empty() {
let additional_binaries_dir = destination_path
.as_ref()
.join(".libcnb-cargo")
.join("additional-bin");
fs::create_dir_all(&additional_binaries_dir)?;
for (binary_target_name, binary_path) in &buildpack_binaries.additional_target_binary_paths
{
fs::copy(
binary_path,
additional_binaries_dir.join(binary_target_name),
)?;
}
}
Ok(())
}
#[cfg(target_family = "unix")]
fn create_file_symlink<P: AsRef<Path>, Q: AsRef<Path>>(
original: P,
link: Q,
) -> std::io::Result<()> {
std::os::unix::fs::symlink(original.as_ref(), link.as_ref())
}
#[cfg(target_family = "windows")]
fn create_file_symlink<P: AsRef<Path>, Q: AsRef<Path>>(
original: P,
link: Q,
) -> std::io::Result<()> {
std::os::windows::fs::symlink_file(original.as_ref(), link.as_ref())
}
pub fn default_buildpack_directory_name<BM>(
buildpack_descriptor: &SingleBuildpackDescriptor<BM>,
) -> String {
buildpack_descriptor.buildpack.id.replace('/', "_")
}