Add limiting options to git log

Signed-off-by: knqyf263 <knqyf263@gmail.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/plumbing/object/commit_walker_limit.go b/plumbing/object/commit_walker_limit.go
new file mode 100644
index 0000000..ee56e50
--- /dev/null
+++ b/plumbing/object/commit_walker_limit.go
@@ -0,0 +1,65 @@
+package object
+
+import (
+	"io"
+	"time"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/storer"
+)
+
+type commitLimitIter struct {
+	sourceIter   CommitIter
+	limitOptions LogLimitOptions
+}
+
+type LogLimitOptions struct {
+	Since *time.Time
+	Until *time.Time
+}
+
+func NewCommitLimitIterFromIter(commitIter CommitIter, limitOptions LogLimitOptions) CommitIter {
+	iterator := new(commitLimitIter)
+	iterator.sourceIter = commitIter
+	iterator.limitOptions = limitOptions
+	return iterator
+}
+
+func (c *commitLimitIter) Next() (*Commit, error) {
+	for {
+		commit, err := c.sourceIter.Next()
+		if err != nil {
+			return nil, err
+		}
+
+		if c.limitOptions.Since != nil && commit.Committer.When.Before(*c.limitOptions.Since) {
+			continue
+		}
+		if c.limitOptions.Until != nil && commit.Committer.When.After(*c.limitOptions.Until) {
+			continue
+		}
+		return commit, nil
+	}
+}
+
+func (c *commitLimitIter) ForEach(cb func(*Commit) error) error {
+	for {
+		commit, nextErr := c.Next()
+		if nextErr == io.EOF {
+			break
+		}
+		if nextErr != nil {
+			return nextErr
+		}
+		err := cb(commit)
+		if err == storer.ErrStop {
+			return nil
+		} else if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *commitLimitIter) Close() {
+	c.sourceIter.Close()
+}