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//
// Copyright (c) 2020-2021 science+computing ag and other contributors
//
// This program and the accompanying materials are made
// available under the terms of the Eclipse Public License 2.0
// which is available at https://www.eclipse.org/legal/epl-2.0/
//
// SPDX-License-Identifier: EPL-2.0
//
//! Implementation of the 'tree-of' subcommand
use std::convert::TryFrom;
use anyhow::Error;
use anyhow::Result;
use clap::ArgMatches;
use resiter::AndThen;
use crate::package::Dag;
use crate::package::PackageName;
use crate::package::PackageVersionConstraint;
use crate::repository::Repository;
/// Implementation of the "tree_of" subcommand
pub async fn tree_of(
matches: &ArgMatches,
repo: Repository,
) -> Result<()> {
let pname = matches
.value_of("package_name")
.map(String::from)
.map(PackageName::from);
let pvers = matches
.value_of("package_version")
.map(PackageVersionConstraint::try_from)
.transpose()?;
repo.packages()
.filter(|p| pname.as_ref().map(|n| p.name() == n).unwrap_or(true))
.filter(|p| {
pvers
.as_ref()
.map(|v| v.matches(p.version()))
.unwrap_or(true)
})
.map(|package| Dag::for_root_package(package.clone(), &repo, None))
.and_then_ok(|tree| {
let stdout = std::io::stdout();
let mut outlock = stdout.lock();
ptree::write_tree(&tree.display(), &mut outlock).map_err(Error::from)
})
.collect::<Result<()>>()
}
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