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extern crate cargo;
extern crate walkdir;
macro_rules! bail {
($($fmt:tt)*) => (
return Err(human(&format_args!($($fmt)*)))
)
}
pub mod ops {
use std::path::{Path, PathBuf};
use std::fs;
use std::env;
use cargo::util::{CargoResult, Config, human};
use cargo::util::to_semver::ToSemver;
use cargo::core::Package;
use cargo::core::source::{Source, SourceId};
use cargo::core::dependency::Dependency;
use cargo::sources::{GitSource, PathSource, SourceConfigMap};
use walkdir::WalkDir;
pub fn clone(krate: Option<&str>,
srcid: &SourceId,
prefix: Option<&str>,
vers: Option<&str>,
config: &Config)
-> CargoResult<()> {
let map = SourceConfigMap::new(config)?;
let pkg = if srcid.is_path(){
let path = srcid.url().to_file_path().ok().expect("path must be valid");
let mut src = PathSource::new(&path, srcid, config);
src.update()?;
select_pkg(src, krate, vers, &mut |path| path.read_packages())?
}
else if srcid.is_git() {
select_pkg(GitSource::new(srcid, config),
krate, vers, &mut |git| git.read_packages())?
} else {
select_pkg(map.load(srcid)?,
krate, vers,
&mut |_| Err(human("must specify a crate to clone from \
crates.io, or use --path or --git to \
specify alternate source")))?
};
let mut dest_path = match prefix {
Some(path) => PathBuf::from(path),
None => try!(env::current_dir())
};
dest_path.push(pkg.name());
try!(clone_directory(&pkg.root(), &dest_path));
Ok(())
}
fn select_pkg<'a, T>(mut src: T,
name: Option<&str>,
vers: Option<&str>,
list_all: &mut FnMut(&mut T) -> CargoResult<Vec<Package>>)
-> CargoResult<Package>
where T: Source + 'a
{
src.update()?;
match name {
Some(name) => {
let vers = match vers {
Some(v) => {
match v.to_semver() {
Ok(v) => Some(v.to_string()),
Err(e) => bail!("{}", e),
}
},
None => None
};
let vers = vers.as_ref().map(|s| &**s);
let dep = try!(Dependency::parse_no_deprecated(
name, vers, src.source_id()));
let summaries = try!(src.query(&dep));
let latest = summaries.iter().max_by_key(|s| s.version());
match latest {
Some(l) => {
let pkg = src.download(l.package_id())?;
Ok(pkg)
}
None => bail!("package '{}' not found", name),
}
}
None => {
let candidates = list_all(&mut src)?;
Ok(candidates[0].clone())
}
}
}
fn clone_directory(from: &Path, to: &Path) -> CargoResult<()> {
for entry in WalkDir::new(from) {
let entry = entry.unwrap();
let file_type = entry.file_type();
let mut to = to.to_owned();
to.push(entry.path().strip_prefix(from).unwrap());
if file_type.is_file() && entry.file_name() != ".cargo-ok" {
try!(fs::copy(&entry.path(), &to));
}
else if file_type.is_dir() {
try!(fs::create_dir(&to));
}
}
Ok(())
}
}