vendor: github.com/moby/buildkit v0.12.1-0.20230717122532-faa0cc7da353

full diff:

- https://github.com/moby/buildkit/compare/20230620112432...v0.12.0
- https://github.com/moby/buildkit/compare/v0.12.0...faa0cc7da3536923d85b74b2bb2d13c12a6ecc99

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/moby/buildkit/util/wildcard/wildcard.go

@@ -0,0 +1,87 @@
+package wildcard
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+// New returns a wildcard object for a string that contains "*" symbols.
+func New(s string) (*Wildcard, error) {
+	reStr, err := Wildcard2Regexp(s)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to translate wildcard %q to regexp", s)
+	}
+	re, err := regexp.Compile(reStr)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to compile regexp %q (translated from wildcard %q)", reStr, s)
+	}
+	w := &Wildcard{
+		orig: s,
+		re:   re,
+	}
+	return w, nil
+}
+
+// Wildcard2Regexp translates a wildcard string to a regexp string.
+func Wildcard2Regexp(wildcard string) (string, error) {
+	s := regexp.QuoteMeta(wildcard)
+	if strings.Contains(s, "\\*\\*") {
+		return "", errors.New("invalid wildcard: \"**\"")
+	}
+	s = strings.ReplaceAll(s, "\\*", "(.*)")
+	s = "^" + s + "$"
+	return s, nil
+}
+
+// Wildcard is a wildcard matcher object.
+type Wildcard struct {
+	orig string
+	re   *regexp.Regexp
+}
+
+// String implements fmt.Stringer.
+func (w *Wildcard) String() string {
+	return w.orig
+}
+
+// Match returns a non-nil Match on match.
+func (w *Wildcard) Match(q string) *Match {
+	submatches := w.re.FindStringSubmatch(q)
+	if len(submatches) == 0 {
+		return nil
+	}
+	m := &Match{
+		w:          w,
+		Submatches: submatches,
+		// FIXME: avoid executing regexp twice
+		idx: w.re.FindStringSubmatchIndex(q),
+	}
+	return m
+}
+
+// Match is a matched result.
+type Match struct {
+	w          *Wildcard
+	Submatches []string // 0: the entire query, 1: the first submatch, 2: the second submatch, ...
+	idx        []int
+}
+
+// String implements fmt.Stringer.
+func (m *Match) String() string {
+	if len(m.Submatches) == 0 {
+		return ""
+	}
+	return m.Submatches[0]
+}
+
+// Format formats submatch strings like "$1", "$2".
+func (m *Match) Format(f string) (string, error) {
+	if m.w == nil || len(m.Submatches) == 0 || len(m.idx) == 0 {
+		return "", errors.New("invalid state")
+	}
+	var b []byte
+	b = m.w.re.ExpandString(b, f, m.Submatches[0], m.idx)
+	return string(b), nil
+}