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/*
* Copyright 2016-2018 Doug Goldstein <cardoe@cardoe.com>
*
* Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
* http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
* <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
* option. This file may not be copied, modified, or distributed
* except according to those terms.
*/
extern crate cargo;
extern crate time;
mod metadata;
use cargo::core::registry::PackageRegistry;
use cargo::core::resolver::Method;
use cargo::core::{Package, PackageSet, Resolve, Workspace};
use cargo::ops;
use cargo::util::{important_paths, CargoResult, CargoResultExt};
use cargo::{CliResult, Config};
use std::fs::OpenOptions;
use std::io::Write;
use std::path::PathBuf;
use metadata::EbuildConfig;
/// Finds the root Cargo.toml of the workspace
fn workspace(config: &Config, manifest_path: Option<String>) -> CargoResult<Workspace> {
let root = important_paths::find_root_manifest_for_wd(manifest_path, config.cwd())?;
Workspace::new(&root, config)
}
/// Generates a package registry by using the Cargo.lock or creating one as necessary
fn registry<'a>(config: &'a Config, package: &Package) -> CargoResult<PackageRegistry<'a>> {
let mut registry = PackageRegistry::new(config)?;
registry.add_sources(&[package.package_id().source_id().clone()])?;
Ok(registry)
}
/// Resolve the packages necessary for the workspace
fn resolve<'a>(
registry: &mut PackageRegistry,
workspace: &'a Workspace,
) -> CargoResult<(PackageSet<'a>, Resolve)> {
// resolve our dependencies
let (packages, resolve) = ops::resolve_ws(workspace)?;
// resolve with all features set so we ensure we get all of the depends downloaded
let resolve = ops::resolve_with_previous(
registry,
workspace,
/* resolve it all */
Method::Everything,
/* previous */
Some(&resolve),
/* don't avoid any */
None,
/* specs */
&[],
)?;
Ok((packages, resolve))
}
pub fn run(verbose: u32, quiet: bool) -> CliResult {
// create a default Cargo config
let config = Config::default()?;
config.configure(
verbose,
Some(quiet),
/* color */
&None,
/* frozen */
false,
/* locked */
false,
)?;
// Load the workspace and current package
let workspace = workspace(&config, None)?;
let package = workspace.current()?;
// Resolve all dependencies (generate or use Cargo.lock as necessary)
let mut registry = registry(&config, &package)?;
let resolve = resolve(&mut registry, &workspace)?;
// build the crates the package needs
let mut crates = resolve
.1
.iter()
.map(|pkg| format!("{}-{}\n", pkg.name(), pkg.version()))
.collect::<Vec<String>>();
// sort the crates
crates.sort();
let ebuild_data = EbuildConfig::from_package(package, crates);
// build up the ebuild path
let ebuild_path = PathBuf::from(format!("{}-{}.ebuild", package.name(), package.version()));
// Open the file where we'll write the ebuild
let mut file = OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(&ebuild_path)
.chain_err(|| "failed to create ebuild")?;
// write the contents out
write!(
file,
include_str!("ebuild.template"),
description = ebuild_data.description.trim(),
homepage = ebuild_data.homepage.trim(),
license = ebuild_data.license.trim(),
crates = ebuild_data.crates.join(""),
cargo_ebuild_ver = env!("CARGO_PKG_VERSION"),
this_year = 1900 + time::now().tm_year,
).chain_err(|| "unable to write ebuild to disk")?;
println!("Wrote: {}", ebuild_path.display());
Ok(())
}
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