Add shelf module

1 files changed, 48 insertions, 0 deletions

diff --git a/shelf/ignore.go b/shelf/ignore.go
new file mode 100644
index 0000000..be061f3
--- /dev/null
+++ b/shelf/ignore.go
@@ -0,0 +1,48 @@
+package shelf
+
+import (
+	"bufio"
+	"bytes"
+	"path/filepath"
+	"strings"
+
+	"github.com/go-git/go-git/v5/plumbing/format/gitignore"
+)
+
+type Ignore struct {
+	matcher gitignore.Matcher
+}
+
+func newIgnore(data []byte) *Ignore {
+	var patterns []gitignore.Pattern
+
+	scanner := bufio.NewScanner(bytes.NewReader(data))
+
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		patterns = append(patterns, gitignore.ParsePattern(line, nil))
+	}
+
+	return &Ignore{
+		matcher: gitignore.NewMatcher(patterns),
+	}
+}
+
+func (i *Ignore) Match(path string, isDir bool) bool {
+	parts := strings.Split(filepath.ToSlash(path), "/")
+
+	var segments []string
+
+	for _, p := range parts {
+		if p != "" {
+			segments = append(segments, p)
+		}
+	}
+
+	return i.matcher.Match(segments, isDir)
+}