Move match to a separate package

1 files changed, 30 insertions, 0 deletions

diff --git a/match/file.go b/match/file.go
new file mode 100644
index 0000000..c972ce0
--- /dev/null
+++ b/match/file.go
@@ -0,0 +1,30 @@
+package match
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// File is a file name Matcher, if the last word can prefix the
+// File path, there is a possible match
+type File string
+
+func (a File) String() string {
+	return string(a)
+}
+
+// Match returns true if prefix's abs path prefixes a's abs path
+func (a File) Match(prefix string) bool {
+	full, err := filepath.Abs(string(a))
+	if err != nil {
+		return false
+	}
+	prefixFull, err := filepath.Abs(prefix)
+	if err != nil {
+		return false
+	}
+
+	// if the file has the prefix as prefix,
+	// but we don't want to show too many files, so, if it is in a deeper directory - omit it.
+	return strings.HasPrefix(full, prefixFull) && (full == prefixFull || !strings.Contains(full[len(prefixFull)+1:], "/"))
+}