| 75 | } |
| 76 | |
| 77 | func (dr *DiffResolver) Start() { |
| 78 | go func() { |
| 79 | defer close(dr.resultCh) |
| 80 | src, srcOk := <-dr.srcCh |
| 81 | dst, dstOk := <-dr.dstCh |
| 82 | for { |
| 83 | if !srcOk && !dstOk { |
| 84 | dr.resultCh <- DiffResolverResult{ |
| 85 | Action: DiffResolverEOF, |
| 86 | } |
| 87 | return |
| 88 | } else if !srcOk || (dstOk && src.ObjName > dst.ObjName) { |
| 89 | dr.resultCh <- DiffResolverResult{ |
| 90 | Action: DiffResolverRecv, |
| 91 | Dst: dst, |
| 92 | } |
| 93 | dst, dstOk = <-dr.dstCh |
| 94 | } else if !dstOk || (srcOk && src.ObjName < dst.ObjName) { |
| 95 | remote, err := dr.ctx.IsObjFromRemote(src) |
| 96 | if err != nil { |
| 97 | dr.resultCh <- DiffResolverResult{ |
| 98 | Action: DiffResolverErr, |
| 99 | Src: src, |
| 100 | Dst: dst, |
| 101 | Err: err, |
| 102 | } |
| 103 | return |
| 104 | } |
| 105 | if remote { |
| 106 | cos.Assert(!dstOk || dst.Link == "") // destination must be remote as well |
| 107 | dr.resultCh <- DiffResolverResult{ |
| 108 | Action: DiffResolverDelete, |
| 109 | Src: src, |
| 110 | } |
| 111 | } else { |
| 112 | dr.resultCh <- DiffResolverResult{ |
| 113 | Action: DiffResolverSend, |
| 114 | Src: src, |
| 115 | } |
| 116 | } |
| 117 | src, srcOk = <-dr.srcCh |
| 118 | } else { /* s.ObjName == d.ObjName */ |
| 119 | equal, err := dr.ctx.CompareObjects(src, dst) |
| 120 | if err != nil { |
| 121 | dr.resultCh <- DiffResolverResult{ |
| 122 | Action: DiffResolverErr, |
| 123 | Src: src, |
| 124 | Dst: dst, |
| 125 | Err: err, |
| 126 | } |
| 127 | return |
| 128 | } |
| 129 | if equal { |
| 130 | dr.resultCh <- DiffResolverResult{ |
| 131 | Action: DiffResolverSkip, |
| 132 | Src: src, |
| 133 | Dst: dst, |
| 134 | } |