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106 lines
2.3 KiB
106 lines
2.3 KiB
package commitgraph
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import (
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"io"
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"github.com/emirpasic/gods/trees/binaryheap"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/plumbing/storer"
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)
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type commitNodeIteratorByCTime struct {
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heap *binaryheap.Heap
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seenExternal map[plumbing.Hash]bool
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seen map[plumbing.Hash]bool
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}
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// NewCommitNodeIterCTime returns a CommitNodeIter that walks the commit history,
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// starting at the given commit and visiting its parents while preserving Committer Time order.
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// this appears to be the closest order to `git log`
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// The given callback will be called for each visited commit. Each commit will
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// be visited only once. If the callback returns an error, walking will stop
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// and will return the error. Other errors might be returned if the history
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// cannot be traversed (e.g. missing objects). Ignore allows to skip some
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// commits from being iterated.
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func NewCommitNodeIterCTime(
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c CommitNode,
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seenExternal map[plumbing.Hash]bool,
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ignore []plumbing.Hash,
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) CommitNodeIter {
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seen := make(map[plumbing.Hash]bool)
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for _, h := range ignore {
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seen[h] = true
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}
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heap := binaryheap.NewWith(func(a, b interface{}) int {
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if a.(CommitNode).CommitTime().Before(b.(CommitNode).CommitTime()) {
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return 1
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}
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return -1
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})
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heap.Push(c)
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return &commitNodeIteratorByCTime{
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heap: heap,
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seenExternal: seenExternal,
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seen: seen,
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}
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}
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func (w *commitNodeIteratorByCTime) Next() (CommitNode, error) {
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var c CommitNode
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for {
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cIn, ok := w.heap.Pop()
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if !ok {
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return nil, io.EOF
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}
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c = cIn.(CommitNode)
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cID := c.ID()
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if w.seen[cID] || w.seenExternal[cID] {
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continue
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}
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w.seen[cID] = true
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for i, h := range c.ParentHashes() {
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if w.seen[h] || w.seenExternal[h] {
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continue
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}
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pc, err := c.ParentNode(i)
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if err != nil {
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return nil, err
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}
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w.heap.Push(pc)
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}
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return c, nil
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}
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}
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func (w *commitNodeIteratorByCTime) ForEach(cb func(CommitNode) error) error {
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for {
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c, err := w.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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return err
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}
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err = cb(c)
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if err == storer.ErrStop {
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break
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}
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (w *commitNodeIteratorByCTime) Close() {}
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