1 files changed, 0 insertions, 319 deletions
diff --git a/tools/nogo/config.go b/tools/nogo/config.go
deleted file mode 100644
index ee2533610..000000000
--- a/tools/nogo/config.go
+++ /dev/null
@@ -1,319 +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 (
-	"fmt"
-	"regexp"
-)
-
-// GroupName is a named group.
-type GroupName string
-
-// AnalyzerName is a named analyzer.
-type AnalyzerName string
-
-// Group represents a named collection of files.
-type Group struct {
-	// Name is the short name for the group.
-	Name GroupName `yaml:"name"`
-
-	// Regex matches all full paths in the group.
-	Regex string         `yaml:"regex"`
-	regex *regexp.Regexp `yaml:"-"`
-
-	// Default determines the default group behavior.
-	//
-	// If Default is true, all Analyzers are enabled for this
-	// group. Otherwise, Analyzers must be individually enabled
-	// by specifying a (possible empty) ItemConfig for the group
-	// in the AnalyzerConfig.
-	Default bool `yaml:"default"`
-}
-
-func (g *Group) compile() error {
-	r, err := regexp.Compile(g.Regex)
-	if err != nil {
-		return err
-	}
-	g.regex = r
-	return nil
-}
-
-// ItemConfig is an (Analyzer,Group) configuration.
-type ItemConfig struct {
-	// Exclude are analyzer exclusions.
-	//
-	// Exclude is a list of regular expressions. If the corresponding
-	// Analyzer emits a Finding for which Finding.Position.String()
-	// matches a regular expression in Exclude, the finding will not
-	// be reported.
-	Exclude []string         `yaml:"exclude,omitempty"`
-	exclude []*regexp.Regexp `yaml:"-"`
-
-	// Suppress are analyzer suppressions.
-	//
-	// Suppress is a list of regular expressions. If the corresponding
-	// Analyzer emits a Finding for which Finding.Message matches a regular
-	// expression in Suppress, the finding will not be reported.
-	Suppress []string         `yaml:"suppress,omitempty"`
-	suppress []*regexp.Regexp `yaml:"-"`
-}
-
-func compileRegexps(ss []string, rs *[]*regexp.Regexp) error {
-	*rs = make([]*regexp.Regexp, len(ss))
-	for i, s := range ss {
-		r, err := regexp.Compile(s)
-		if err != nil {
-			return err
-		}
-		(*rs)[i] = r
-	}
-	return nil
-}
-
-// RegexpCount is used by AnalyzerConfig.RegexpCount.
-func (i *ItemConfig) RegexpCount() int64 {
-	if i == nil {
-		// See compile.
-		return 0
-	}
-	// Return the number of regular expressions compiled for these items.
-	// This is how the cache size of the configuration is measured.
-	return int64(len(i.exclude) + len(i.suppress))
-}
-
-func (i *ItemConfig) compile() error {
-	if i == nil {
-		// This may be nil if nothing is included in the
-		// item configuration. That's fine, there's nothing
-		// to compile and nothing to exclude & suppress.
-		return nil
-	}
-	if err := compileRegexps(i.Exclude, &i.exclude); err != nil {
-		return fmt.Errorf("in exclude: %w", err)
-	}
-	if err := compileRegexps(i.Suppress, &i.suppress); err != nil {
-		return fmt.Errorf("in suppress: %w", err)
-	}
-	return nil
-}
-
-func merge(a, b []string) []string {
-	found := make(map[string]struct{})
-	result := make([]string, 0, len(a)+len(b))
-	for _, elem := range a {
-		found[elem] = struct{}{}
-		result = append(result, elem)
-	}
-	for _, elem := range b {
-		if _, ok := found[elem]; ok {
-			continue
-		}
-		result = append(result, elem)
-	}
-	return result
-}
-
-func (i *ItemConfig) merge(other *ItemConfig) {
-	i.Exclude = merge(i.Exclude, other.Exclude)
-	i.Suppress = merge(i.Suppress, other.Suppress)
-}
-
-func (i *ItemConfig) shouldReport(fullPos, msg string) bool {
-	if i == nil {
-		// See above.
-		return true
-	}
-	for _, r := range i.exclude {
-		if r.MatchString(fullPos) {
-			return false
-		}
-	}
-	for _, r := range i.suppress {
-		if r.MatchString(msg) {
-			return false
-		}
-	}
-	return true
-}
-
-// AnalyzerConfig is the configuration for a single analyzers.
-//
-// This map is keyed by individual Group names, to allow for different
-// configurations depending on what Group the file belongs to.
-type AnalyzerConfig map[GroupName]*ItemConfig
-
-// RegexpCount is used by Config.Size.
-func (a AnalyzerConfig) RegexpCount() int64 {
-	count := int64(0)
-	for _, gc := range a {
-		count += gc.RegexpCount()
-	}
-	return count
-}
-
-func (a AnalyzerConfig) compile() error {
-	for name, gc := range a {
-		if err := gc.compile(); err != nil {
-			return fmt.Errorf("invalid group %q: %v", name, err)
-		}
-	}
-	return nil
-}
-
-func (a AnalyzerConfig) merge(other AnalyzerConfig) {
-	// Merge all the groups.
-	for name, gc := range other {
-		old, ok := a[name]
-		if !ok || old == nil {
-			a[name] = gc // Not configured in a.
-			continue
-		}
-		old.merge(gc)
-	}
-}
-
-// shouldReport returns whether the finding should be reported or suppressed.
-// It returns !ok if there is no configuration sufficient to decide one way or
-// another.
-func (a AnalyzerConfig) shouldReport(groupConfig *Group, fullPos, msg string) (report, ok bool) {
-	gc, ok := a[groupConfig.Name]
-	if !ok {
-		return false, false
-	}
-
-	// Note that if a section appears for a particular group
-	// for a particular analyzer, then it will now be enabled,
-	// and the group default no longer applies.
-	return gc.shouldReport(fullPos, msg), true
-}
-
-// Config is a nogo configuration.
-type Config struct {
-	// Prefixes defines a set of regular expressions that
-	// are standard "prefixes", so that files can be grouped
-	// and specific rules applied to individual groups.
-	Groups []Group `yaml:"groups"`
-
-	// Global is the global analyzer config.
-	Global AnalyzerConfig `yaml:"global"`
-
-	// Analyzers are individual analyzer configurations. The
-	// key for each analyzer is the name of the analyzer. The
-	// value is either a boolean (enable/disable), or a map to
-	// the groups above.
-	Analyzers map[AnalyzerName]AnalyzerConfig `yaml:"analyzers"`
-}
-
-// Size implements worker.Sizer.Size.
-func (c *Config) Size() int64 {
-	count := c.Global.RegexpCount()
-	for _, config := range c.Analyzers {
-		count += config.RegexpCount()
-	}
-	// The size is measured as the number of regexps that are compiled
-	// here. We multiply by 1k to produce an estimate.
-	return 1024 * count
-}
-
-// Merge merges two configurations.
-func (c *Config) Merge(other *Config) {
-	// Merge all groups.
-	//
-	// Select the other first, as the order provided in the second will
-	// provide precendence over the same group defined in the first one.
-	seenGroups := make(map[GroupName]struct{})
-	newGroups := make([]Group, 0, len(c.Groups)+len(other.Groups))
-	for _, g := range other.Groups {
-		newGroups = append(newGroups, g)
-		seenGroups[g.Name] = struct{}{}
-	}
-	for _, g := range c.Groups {
-		if _, ok := seenGroups[g.Name]; ok {
-			continue
-		}
-		newGroups = append(newGroups, g)
-	}
-	c.Groups = newGroups
-
-	// Merge global configurations.
-	c.Global.merge(other.Global)
-
-	// Merge all analyzer configurations.
-	for name, ac := range other.Analyzers {
-		old, ok := c.Analyzers[name]
-		if !ok {
-			c.Analyzers[name] = ac // No analyzer in original config.
-			continue
-		}
-		old.merge(ac)
-	}
-}
-
-// Compile compiles a configuration to make it useable.
-func (c *Config) Compile() error {
-	for i := 0; i < len(c.Groups); i++ {
-		if err := c.Groups[i].compile(); err != nil {
-			return fmt.Errorf("invalid group %q: %w", c.Groups[i].Name, err)
-		}
-	}
-	if err := c.Global.compile(); err != nil {
-		return fmt.Errorf("invalid global: %w", err)
-	}
-	for name, ac := range c.Analyzers {
-		if err := ac.compile(); err != nil {
-			return fmt.Errorf("invalid analyzer %q: %w", name, err)
-		}
-	}
-	return nil
-}
-
-// ShouldReport returns true iff the finding should match the Config.
-func (c *Config) ShouldReport(finding Finding) bool {
-	fullPos := finding.Position.String()
-
-	// Find the matching group.
-	var groupConfig *Group
-	for i := 0; i < len(c.Groups); i++ {
-		if c.Groups[i].regex.MatchString(fullPos) {
-			groupConfig = &c.Groups[i]
-			break
-		}
-	}
-
-	// If there is no group matching this path, then
-	// we default to accept the finding.
-	if groupConfig == nil {
-		return true
-	}
-
-	// Suppress via global rule?
-	report, ok := c.Global.shouldReport(groupConfig, fullPos, finding.Message)
-	if ok && !report {
-		return false
-	}
-
-	// Try the analyzer config.
-	ac, ok := c.Analyzers[finding.Category]
-	if !ok {
-		return groupConfig.Default
-	}
-	report, ok = ac.shouldReport(groupConfig, fullPos, finding.Message)
-	if !ok {
-		return groupConfig.Default
-	}
-	return report
-}