mirror of
https://github.com/minio/mc.git
synced 2026-01-04 02:44:40 +03:00
101 lines
3.0 KiB
Go
101 lines
3.0 KiB
Go
/*
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* Minio Client (C) 2015 Minio, Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 main
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import (
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"github.com/minio/mc/pkg/client"
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"github.com/minio/minio/pkg/iodine"
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)
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//
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// NOTE: All the parse rules should reduced to A: Copy(Source, Target).
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//
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// * SINGLE SOURCE - VALID
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// =======================
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// A: sync(f, f) -> copy(f, f)
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// B: sync(f, d) -> copy(f, d/f) -> A
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// C: sync(f, []d) -> []copy(f, d/f) -> []A
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// D: sync(d1..., d2) -> []copy(d1/f, d2/d1/f) -> []A
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// E: sync(d1..., []d2) -> [][]copy(d1/f, d2/d1/f) -> [][]A
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//
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// * SINGLE SOURCE - INVALID
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// =========================
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// sync(d, *)
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// sync(d..., f)
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// sync(*, d...)
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//
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// * MULTI-TARGET RECURSIVE - INVALID
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// ==================================
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// sync(*, f1)
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// sync(*, []f1)
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type syncURLs struct {
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SourceContent *client.Content
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TargetContents []*client.Content
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Error error
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}
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// prepareCopyURLs - prepares target and source URLs for syncing.
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func prepareSyncURLs(sourceURL string, targetURLs []string) <-chan syncURLs {
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syncURLsCh := make(chan syncURLs)
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go func() {
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defer close(syncURLsCh)
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switch guessCopyURLType([]string{sourceURL}, targetURLs[0]) {
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case cpURLsTypeA:
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var sURLs syncURLs
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for _, targetURL := range targetURLs {
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cpURLs := prepareCopyURLsTypeA(sourceURL, targetURL)
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if cpURLs.Error != nil {
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syncURLsCh <- syncURLs{Error: iodine.New(cpURLs.Error, nil)}
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continue
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}
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sURLs.SourceContent = cpURLs.SourceContent
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sURLs.TargetContents = append(sURLs.TargetContents, cpURLs.TargetContent)
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}
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syncURLsCh <- sURLs
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case cpURLsTypeB:
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var sURLs syncURLs
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for _, targetURL := range targetURLs {
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cpURLs := prepareCopyURLsTypeB(sourceURL, targetURL)
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if cpURLs.Error != nil {
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syncURLsCh <- syncURLs{Error: iodine.New(cpURLs.Error, nil)}
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continue
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}
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sURLs.SourceContent = cpURLs.SourceContent
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sURLs.TargetContents = append(sURLs.TargetContents, cpURLs.TargetContent)
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}
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syncURLsCh <- sURLs
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case cpURLsTypeC:
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var sURLs syncURLs
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for _, targetURL := range targetURLs {
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for cpURLs := range prepareCopyURLsTypeC(sourceURL, targetURL) {
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if cpURLs.Error != nil {
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syncURLsCh <- syncURLs{Error: iodine.New(cpURLs.Error, nil)}
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continue
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}
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sURLs.SourceContent = cpURLs.SourceContent
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sURLs.TargetContents = append(sURLs.TargetContents, cpURLs.TargetContent)
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syncURLsCh <- sURLs
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}
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}
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default:
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syncURLsCh <- syncURLs{Error: iodine.New(errInvalidArgument{}, nil)}
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}
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}()
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return syncURLsCh
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}
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