1 files changed, 0 insertions, 161 deletions
diff --git a/tools/nogo/matchers.go b/tools/nogo/matchers.go
deleted file mode 100644
index 5c39be630..000000000
--- a/tools/nogo/matchers.go
+++ /dev/null
@@ -1,161 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package nogo
-
-import (
-	"go/token"
-	"regexp"
-	"strings"
-
-	"golang.org/x/tools/go/analysis"
-)
-
-type matcher interface {
-	ShouldReport(d analysis.Diagnostic, fs *token.FileSet) bool
-}
-
-// pathRegexps filters explicit paths.
-type pathRegexps struct {
-	expr []*regexp.Regexp
-
-	// include, if true, indicates that paths matching any regexp in expr
-	// match.
-	//
-	// If false, paths matching no regexps in expr match.
-	include bool
-}
-
-// buildRegexps builds a list of regular expressions.
-//
-// This will panic on error.
-func buildRegexps(prefix string, args ...string) []*regexp.Regexp {
-	result := make([]*regexp.Regexp, 0, len(args))
-	for _, arg := range args {
-		result = append(result, regexp.MustCompile(prefix+arg))
-	}
-	return result
-}
-
-// notPath works around the lack of backtracking.
-//
-// It is used to construct a regular expression for non-matching components.
-func notPath(name string) string {
-	sb := strings.Builder{}
-	sb.WriteString("(")
-	for i := range name {
-		if i > 0 {
-			sb.WriteString("|")
-		}
-		sb.WriteString(name[:i])
-		sb.WriteString("[^")
-		sb.WriteByte(name[i])
-		sb.WriteString("/][^/]*")
-	}
-	sb.WriteString(")")
-	return sb.String()
-}
-
-// ShouldReport implements matcher.ShouldReport.
-func (p *pathRegexps) ShouldReport(d analysis.Diagnostic, fs *token.FileSet) bool {
-	fullPos := fs.Position(d.Pos).String()
-	for _, path := range p.expr {
-		if path.MatchString(fullPos) {
-			return p.include
-		}
-	}
-	return !p.include
-}
-
-// internalExcluded excludes specific internal paths.
-func internalExcluded(paths ...string) *pathRegexps {
-	return &pathRegexps{
-		expr:    buildRegexps(internalPrefix, paths...),
-		include: false,
-	}
-}
-
-// excludedExcluded excludes specific external paths.
-func externalExcluded(paths ...string) *pathRegexps {
-	return &pathRegexps{
-		expr:    buildRegexps(externalPrefix, paths...),
-		include: false,
-	}
-}
-
-// internalMatches returns a path matcher for internal packages.
-func internalMatches() *pathRegexps {
-	return &pathRegexps{
-		expr:    buildRegexps(internalPrefix, internalDefault),
-		include: true,
-	}
-}
-
-// resultExcluded excludes explicit message contents.
-type resultExcluded []string
-
-// ShouldReport implements matcher.ShouldReport.
-func (r resultExcluded) ShouldReport(d analysis.Diagnostic, _ *token.FileSet) bool {
-	for _, str := range r {
-		if strings.Contains(d.Message, str) {
-			return false
-		}
-	}
-	return true // Not excluded.
-}
-
-// andMatcher is a composite matcher.
-type andMatcher struct {
-	first  matcher
-	second matcher
-}
-
-// ShouldReport implements matcher.ShouldReport.
-func (a *andMatcher) ShouldReport(d analysis.Diagnostic, fs *token.FileSet) bool {
-	return a.first.ShouldReport(d, fs) && a.second.ShouldReport(d, fs)
-}
-
-// and is a syntactic convension for andMatcher.
-func and(first matcher, second matcher) *andMatcher {
-	return &andMatcher{
-		first:  first,
-		second: second,
-	}
-}
-
-// anyMatcher matches everything.
-type anyMatcher struct{}
-
-// ShouldReport implements matcher.ShouldReport.
-func (anyMatcher) ShouldReport(analysis.Diagnostic, *token.FileSet) bool {
-	return true
-}
-
-// alwaysMatches returns an anyMatcher instance.
-func alwaysMatches() anyMatcher {
-	return anyMatcher{}
-}
-
-// neverMatcher will never match.
-type neverMatcher struct{}
-
-// ShouldReport implements matcher.ShouldReport.
-func (neverMatcher) ShouldReport(analysis.Diagnostic, *token.FileSet) bool {
-	return false
-}
-
-// disableMatches returns a neverMatcher instance.
-func disableMatches() neverMatcher {
-	return neverMatcher{}
-}