ansxor.ca
forked from
tangled.org/core
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knotserver: add generic git repo walker interface
Signed-off-by: oppiliappan <me@oppi.li>
oppi.li
+79
knotserver/git/tree.go
+79
knotserver/git/tree.go
···
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import (
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"context"
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"errors"
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"fmt"
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"path"
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"time"
···
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return nts
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}
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+
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var (
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TerminateWalk error = errors.New("terminate walk")
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)
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type callback = func(node object.TreeEntry, parent *object.Tree, fullPath string) error
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func (g *GitRepo) Walk(
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ctx context.Context,
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root string,
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cb callback,
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) error {
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c, err := g.r.CommitObject(g.h)
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if err != nil {
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return fmt.Errorf("commit object: %w", err)
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}
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tree, err := c.Tree()
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if err != nil {
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return fmt.Errorf("file tree: %w", err)
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}
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subtree := tree
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if root != "" {
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subtree, err = tree.Tree(root)
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if err != nil {
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return fmt.Errorf("sub tree: %w", err)
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}
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}
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return g.walkHelper(ctx, root, subtree, cb)
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}
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func (g *GitRepo) walkHelper(
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ctx context.Context,
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root string,
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currentTree *object.Tree,
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cb callback,
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) error {
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for _, e := range currentTree.Entries {
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// check if context hits deadline before processing
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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}
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mode, err := e.Mode.ToOSFileMode()
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if err != nil {
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// TODO: log this
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continue
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}
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if e.Mode.IsFile() {
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err = cb(e, currentTree, root)
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if errors.Is(err, TerminateWalk) {
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return err
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}
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}
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// e is a directory
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if mode.IsDir() {
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subtree, err := currentTree.Tree(e.Name)
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if err != nil {
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return fmt.Errorf("sub tree %s: %w", e.Name, err)
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}
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fullPath := path.Join(root, e.Name)
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err = g.walkHelper(ctx, fullPath, subtree, cb)
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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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}
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return nil
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}