mirror of
https://github.com/kubernetes-sigs/kustomize.git
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90 lines
2.9 KiB
Go
90 lines
2.9 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package loader has a data loading interface and various implementations.
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package loader
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import "fmt"
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// Loader interface exposes methods to read bytes.
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type Loader interface {
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// Root returns the root location for this Loader.
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Root() string
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// New returns Loader located at newRoot.
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New(newRoot string) (Loader, error)
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// Load returns the bytes read from the location or an error.
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Load(location string) ([]byte, error)
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// GlobLoad returns the bytes read from a glob path or an error.
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GlobLoad(location string) (map[string][]byte, error)
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}
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// Private implementation of Loader interface.
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type loaderImpl struct {
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root string
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fLoader *FileLoader
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}
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const emptyRoot = ""
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// NewLoader initializes the first loader with the supported fLoader.
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func NewLoader(fl *FileLoader) Loader {
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return &loaderImpl{root: emptyRoot, fLoader: fl}
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}
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// Root returns the root location for this Loader.
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func (l *loaderImpl) Root() string {
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return l.root
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}
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// Returns a new Loader rooted at newRoot. "newRoot" MUST be
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// a directory (not a file). The directory can have a trailing
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// slash or not.
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// Example: "/home/seans/project" or "/home/seans/project/"
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// NOT "/home/seans/project/file.yaml".
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func (l *loaderImpl) New(newRoot string) (Loader, error) {
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if !l.fLoader.IsAbsPath(l.root, newRoot) {
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return nil, fmt.Errorf("Not abs path: l.root='%s', loc='%s'\n", l.root, newRoot)
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}
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root, err := l.fLoader.FullLocation(l.root, newRoot)
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if err != nil {
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return nil, err
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}
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return &loaderImpl{root: root, fLoader: l.fLoader}, nil
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}
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// Load returns all the bytes read from location or an error.
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// "location" can be an absolute path, or if relative, full location is
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// calculated from the Root().
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func (l *loaderImpl) Load(location string) ([]byte, error) {
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fullLocation, err := l.fLoader.FullLocation(l.root, location)
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if err != nil {
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fmt.Printf("Trouble in fulllocation: %v\n", err)
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return nil, err
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}
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return l.fLoader.Load(fullLocation)
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}
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// GlobLoad returns a map from path to bytes read from the location or an error.
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// "location" can be an absolute path, or if relative, full location is
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// calculated from the Root().
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func (l *loaderImpl) GlobLoad(location string) (map[string][]byte, error) {
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fullLocation, err := l.fLoader.FullLocation(l.root, location)
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if err != nil {
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return nil, err
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}
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return l.fLoader.GlobLoad(fullLocation)
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}
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