Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/cmd/go/internal/str/path.go b/src/cmd/go/internal/str/path.go
new file mode 100644
index 0000000..c165b91
--- /dev/null
+++ b/src/cmd/go/internal/str/path.go
@@ -0,0 +1,86 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package str
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// HasPathPrefix reports whether the slash-separated path s
+// begins with the elements in prefix.
+func HasPathPrefix(s, prefix string) bool {
+	if len(s) == len(prefix) {
+		return s == prefix
+	}
+	if prefix == "" {
+		return true
+	}
+	if len(s) > len(prefix) {
+		if prefix[len(prefix)-1] == '/' || s[len(prefix)] == '/' {
+			return s[:len(prefix)] == prefix
+		}
+	}
+	return false
+}
+
+// HasFilePathPrefix reports whether the filesystem path s
+// begins with the elements in prefix.
+func HasFilePathPrefix(s, prefix string) bool {
+	sv := strings.ToUpper(filepath.VolumeName(s))
+	pv := strings.ToUpper(filepath.VolumeName(prefix))
+	s = s[len(sv):]
+	prefix = prefix[len(pv):]
+	switch {
+	default:
+		return false
+	case sv != pv:
+		return false
+	case len(s) == len(prefix):
+		return s == prefix
+	case prefix == "":
+		return true
+	case len(s) > len(prefix):
+		if prefix[len(prefix)-1] == filepath.Separator {
+			return strings.HasPrefix(s, prefix)
+		}
+		return s[len(prefix)] == filepath.Separator && s[:len(prefix)] == prefix
+	}
+}
+
+// TrimFilePathPrefix returns s without the leading path elements in prefix.
+// If s does not start with prefix (HasFilePathPrefix with the same arguments
+// returns false), TrimFilePathPrefix returns s. If s equals prefix,
+// TrimFilePathPrefix returns "".
+func TrimFilePathPrefix(s, prefix string) string {
+	if !HasFilePathPrefix(s, prefix) {
+		return s
+	}
+	trimmed := s[len(prefix):]
+	if len(trimmed) == 0 || trimmed[0] != filepath.Separator {
+		// Prefix either is equal to s, or ends with a separator
+		// (for example, if it is exactly "/").
+		return trimmed
+	}
+	return trimmed[1:]
+}
+
+// QuoteGlob returns s with all Glob metacharacters quoted.
+// We don't try to handle backslash here, as that can appear in a
+// file path on Windows.
+func QuoteGlob(s string) string {
+	if !strings.ContainsAny(s, `*?[]`) {
+		return s
+	}
+	var sb strings.Builder
+	for _, c := range s {
+		switch c {
+		case '*', '?', '[', ']':
+			sb.WriteByte('\\')
+		}
+		sb.WriteRune(c)
+	}
+	return sb.String()
+}