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extern crate cargo;
extern crate rustc_serialize;
extern crate time;
use cargo::{Config, CliResult};
use cargo::core::{Package, PackageSet, Resolve, Workspace};
use cargo::core::registry::PackageRegistry;
use cargo::core::resolver::Method;
use cargo::ops;
use cargo::util::{human, important_paths, CargoResult};
use std::env;
use std::error::Error;
use std::fs::OpenOptions;
use std::io::Write;
use std::path::PathBuf;
/// 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))
}
#[derive(RustcDecodable)]
struct Options {
flag_verbose: u32,
flag_quiet: Option<bool>,
}
const USAGE: &'static str = r#"
Create an ebuild for a project
Usage:
cargo ebuild [options]
Options:
-h, --help Print this message
-v, --verbose Use verbose output
-q, --quiet No output printed to stdout
"#;
fn main() {
let config = Config::default().unwrap();
let args = env::args().collect::<Vec<_>>();
let result = cargo::call_main_without_stdin(real_main, &config, USAGE, &args, false);
if let Err(e) = result {
cargo::handle_cli_error(e, &mut *config.shell());
}
}
fn real_main(options: Options, config: &Config) -> CliResult {
config.configure(options.flag_verbose,
options.flag_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();
// root package metadata
let metadata = package.manifest().metadata();
// package description
let desc = metadata.description
.as_ref()
.cloned()
.unwrap_or_else(|| String::from(package.name()));
// package homepage
let homepage = metadata.homepage
.as_ref()
.cloned()
.unwrap_or(metadata.repository
.as_ref()
.cloned()
.unwrap_or_else(|| String::from("")));
let license = metadata.license
.as_ref()
.cloned()
.unwrap_or_else(|| String::from("unknown license"));
// 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 = try!(OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(&ebuild_path)
.map_err(|err| {
human(format!("failed to create ebuild: {}",
err.description()))
}));
// write the contents out
try!(write!(file,
include_str!("ebuild.template"),
description = desc.trim(),
homepage = homepage.trim(),
license = license.trim(),
crates = crates.join(""),
cargo_ebuild_ver = env!("CARGO_PKG_VERSION"),
this_year = 1900 + time::now().tm_year,
)
.map_err(|err| {
human(format!("unable to write ebuild to disk: {}",
err.description()))
}));
println!("Wrote: {}", ebuild_path.display());
Ok(())
}
|
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