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package object
import (
"io"
"github.com/emirpasic/gods/trees/binaryheap"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/storer"
)
type commitIteratorByCTime struct {
seenExternal map[plumbing.Hash]bool
seen map[plumbing.Hash]bool
heap *binaryheap.Heap
}
// NewCommitIterCTime returns a CommitIter that walks the commit history,
// starting at the given commit and visiting its parents while preserving Committer Time order.
// this appears to be the closest order to `git log`
// The given callback will be called for each visited commit. Each commit will
// be visited only once. If the callback returns an error, walking will stop
// and will return the error. Other errors might be returned if the history
// cannot be traversed (e.g. missing objects). Ignore allows to skip some
// commits from being iterated.
func NewCommitIterCTime(
c *Commit,
seenExternal map[plumbing.Hash]bool,
ignore []plumbing.Hash,
) CommitIter {
seen := make(map[plumbing.Hash]bool)
for _, h := range ignore {
seen[h] = true
}
heap := binaryheap.NewWith(func(a, b interface{}) int {
if a.(*Commit).Committer.When.Before(b.(*Commit).Committer.When) {
return 1
}
return -1
})
heap.Push(c)
return &commitIteratorByCTime{
seenExternal: seenExternal,
seen: seen,
heap: heap,
}
}
func (w *commitIteratorByCTime) Next() (*Commit, error) {
var c *Commit
for {
cIn, ok := w.heap.Pop()
if !ok {
return nil, io.EOF
}
c = cIn.(*Commit)
if w.seen[c.Hash] || w.seenExternal[c.Hash] {
continue
}
w.seen[c.Hash] = true
for _, h := range c.ParentHashes {
if w.seen[h] || w.seenExternal[h] {
continue
}
pc, err := GetCommit(c.s, h)
if err != nil {
return nil, err
}
w.heap.Push(pc)
}
return c, nil
}
}
func (w *commitIteratorByCTime) ForEach(cb func(*Commit) error) error {
for {
c, err := w.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
err = cb(c)
if err == storer.ErrStop {
break
}
if err != nil {
return err
}
}
return nil
}
func (w *commitIteratorByCTime) Close() {}
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