/
package_set.go
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/
package_set.go
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//
// Copyright © 2017-2020 Solus Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Package libeopkg provides Go-native access to `.eopkg` files, allowing
// ferryd to read and manipulate them without having a host-side eopkg
// tool.
//
// It should also be noted that `eopkg` is implemented in Python, so calling
// out to the host-side tool just isn't acceptable for the performance we
// require.
// In time, `sol` will replace eopkg and it is very likely that we'll base
// the new `libsol` component on the C library using cgo.
package libeopkg
// PackageSet provides sorting capabilities for a slice of packages
type PackageSet []*MetaPackage
// Len returns the size of the PackageSet for sorting
func (p PackageSet) Len() int {
return len(p)
}
// Less returns true if Release A is less than Release B
func (p PackageSet) Less(a, b int) bool {
return p[a].GetRelease() < p[b].GetRelease()
}
// Swap exchanges packages when sorting
func (p PackageSet) Swap(a, b int) {
p[a], p[b] = p[b], p[a]
}