74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors All rights reserved.
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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 update
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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"k8s.io/klog/v2"
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)
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// fsUpdate updates local filesystem repo files according to the given schema and data.
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// Returns if the update actually changed anything, and any error occurred.
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func fsUpdate(fsRoot string, schema map[string]Item, data interface{}) (changed bool, err error) {
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var mode os.FileMode = 0644
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for path, item := range schema {
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path = filepath.Join(fsRoot, path)
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// if the item's content is already set, give it precedence over any current file content
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var content []byte
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if item.Content == nil {
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info, err := os.Stat(path)
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if err != nil {
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return false, fmt.Errorf("unable to get file content: %w", err)
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}
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mode = info.Mode()
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content, err = os.ReadFile(path)
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if err != nil {
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return false, fmt.Errorf("unable to read file content: %w", err)
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}
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item.Content = content
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}
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if err := item.apply(data); err != nil {
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return false, fmt.Errorf("unable to update file: %w", err)
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}
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if !bytes.Equal(content, item.Content) {
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// make sure path exists
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if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
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return false, fmt.Errorf("unable to create directory: %w", err)
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}
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if err := os.WriteFile(path, item.Content, mode); err != nil {
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return false, fmt.Errorf("unable to write file: %w", err)
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}
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changed = true
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}
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}
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return changed, nil
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}
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// Loadf returns the file content read as byte slice
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func Loadf(path string) []byte {
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blob, err := os.ReadFile(path)
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if err != nil {
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klog.Fatalf("Unable to load file %s: %v", path, err)
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return nil
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}
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return blob
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}
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