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use std::path::{Path, PathBuf};
use bindgen::cargo::cargo_expand;
use bindgen::cargo::cargo_lock::{self, Lock};
use bindgen::cargo::cargo_metadata::{self, Metadata};
use bindgen::cargo::cargo_toml;
fn parse_dep_string(dep_string: &str) -> (&str, &str) {
let split: Vec<&str> = dep_string.split_whitespace().collect();
(split[0], split[1])
}
pub struct PackageRef {
pub name: String,
pub version: String,
}
pub struct Cargo {
manifest_path: PathBuf,
binding_crate_name: String,
lock: Option<Lock>,
metadata: Metadata,
}
impl Cargo {
pub fn load(crate_dir: &Path,
binding_crate_name: Option<&str>,
use_cargo_lock: bool) -> Result<Cargo, String> {
let toml_path = crate_dir.join("Cargo.toml");
let lock_path = crate_dir.join("Cargo.lock");
let lock = if use_cargo_lock {
Some(cargo_lock::lock(&lock_path)
.map_err(|x| format!("couldn't load {:?}: {:?}", lock_path, x))?)
} else {
None
};
let metadata = cargo_metadata::metadata(&toml_path)
.map_err(|_| format!("couldn't execute `cargo metadata` with manifest {:?}.", toml_path))?;
let manifest = cargo_toml::manifest(&toml_path)
.map_err(|_| format!("couldn't load {:?}.", toml_path))?;
let binding_crate_name = binding_crate_name.map_or(manifest.package.name.clone(),
|x| x.to_owned());
Ok(Cargo {
manifest_path: toml_path,
binding_crate_name: binding_crate_name,
lock: lock,
metadata: metadata,
})
}
pub fn binding_crate_name(&self) -> &str {
&self.binding_crate_name
}
pub fn binding_crate_ref(&self) -> PackageRef {
self.find_pkg_ref(&self.binding_crate_name).unwrap()
}
fn find_pkg_ref(&self, package_name: &str) -> Option<PackageRef> {
for package in &self.metadata.packages {
if package.name == package_name {
return Some(PackageRef {
name: package_name.to_owned(),
version: package.version.clone(),
});
}
}
None
}
pub fn find_dep_ref(&self, package: &PackageRef, dependency_name: &str) -> Option<PackageRef> {
if self.lock.is_none() {
return None;
}
if self.lock.as_ref().unwrap().root.name == package.name &&
self.lock.as_ref().unwrap().root.version == package.version {
if let Some(ref deps) = self.lock.as_ref().unwrap().root.dependencies {
for dep in deps {
let (name, version) = parse_dep_string(dep);
if name == dependency_name {
return Some(PackageRef {
name: name.to_owned(),
version: version.to_owned(),
});
}
}
}
return None;
}
for lock_package in &self.lock.as_ref().unwrap().package {
if lock_package.name == package.name &&
lock_package.version == package.version {
if let Some(ref deps) = lock_package.dependencies {
for dep in deps {
let (name, version) = parse_dep_string(dep);
if name == dependency_name {
return Some(PackageRef {
name: name.to_owned(),
version: version.to_owned(),
});
}
}
}
return None;
}
}
None
}
pub fn find_crate_dir(&self, package: &PackageRef) -> Option<PathBuf> {
for meta_package in &self.metadata.packages {
if meta_package.name == package.name &&
meta_package.version == package.version {
return Path::new(&meta_package.manifest_path).parent()
.map(|x| x.to_owned());
}
}
None
}
pub fn find_crate_src(&self, package: &PackageRef) -> Option<PathBuf> {
let kind_lib = String::from("lib");
let kind_staticlib = String::from("staticlib");
for meta_package in &self.metadata.packages {
if meta_package.name == package.name &&
meta_package.version == package.version {
for target in &meta_package.targets {
if target.kind.contains(&kind_lib) ||
target.kind.contains(&kind_staticlib) {
return Some(PathBuf::from(&target.src_path));
}
}
break;
}
}
None
}
pub fn expand_crate(&self, package: &PackageRef) -> Result<String, String> {
cargo_expand::expand(&self.manifest_path, &package.name, &package.version)
}
}