mirror of
https://github.com/go-gitea/gitea.git
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101 lines
2.0 KiB
Go
101 lines
2.0 KiB
Go
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package object
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import (
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"io"
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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 bfsCommitIterator struct {
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seenExternal map[plumbing.Hash]bool
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seen map[plumbing.Hash]bool
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queue []*Commit
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}
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// NewCommitIterBSF returns a CommitIter that walks the commit history,
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// starting at the given commit and visiting its parents in pre-order.
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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 NewCommitIterBSF(
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c *Commit,
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seenExternal map[plumbing.Hash]bool,
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ignore []plumbing.Hash,
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) CommitIter {
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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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return &bfsCommitIterator{
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seenExternal: seenExternal,
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seen: seen,
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queue: []*Commit{c},
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}
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}
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func (w *bfsCommitIterator) appendHash(store storer.EncodedObjectStorer, h plumbing.Hash) error {
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if w.seen[h] || w.seenExternal[h] {
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return nil
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}
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c, err := GetCommit(store, h)
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if err != nil {
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return err
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}
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w.queue = append(w.queue, c)
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return nil
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}
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func (w *bfsCommitIterator) Next() (*Commit, error) {
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var c *Commit
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for {
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if len(w.queue) == 0 {
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return nil, io.EOF
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}
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c = w.queue[0]
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w.queue = w.queue[1:]
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if w.seen[c.Hash] || w.seenExternal[c.Hash] {
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continue
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}
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w.seen[c.Hash] = true
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for _, h := range c.ParentHashes {
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err := w.appendHash(c.s, h)
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if err != nil {
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return nil, nil
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}
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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 *bfsCommitIterator) ForEach(cb func(*Commit) 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 *bfsCommitIterator) Close() {}
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