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field.go
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field.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Tetragon
package eventchecker
import (
"fmt"
"path/filepath"
"strings"
"github.com/cilium/tetragon/tools/protoc-gen-go-tetragon/common"
"github.com/cilium/tetragon/tools/protoc-gen-go-tetragon/imports"
"github.com/iancoleman/strcase"
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/reflect/protoreflect"
)
const (
checkerVarName = "checker"
eventVarName = "event"
)
type Field struct {
*protogen.Field
IsInnerField bool
}
func (field *Field) generateWith(g *protogen.GeneratedFile, msg *CheckedMessage) error {
typeName, err := field.typeName(g)
if err != nil {
return err
}
g.P(`// With` + field.GoName + ` adds a ` + field.GoName + ` check to the ` + msg.checkerName(g))
if field.isPrimitive() && !(field.isList() || field.isMap()) {
g.P(`func (checker *` + msg.checkerName(g) + `) With` + field.GoName + `(check ` + typeName + `) *` + msg.checkerName(g) + `{
checker.` + field.GoName + ` = &check`)
} else if field.isList() {
g.P(`func (checker *` + msg.checkerName(g) + `) With` + field.GoName + `(check *` + field.listCheckerName(g) + `) *` + msg.checkerName(g) + `{
checker.` + field.GoName + ` = check`)
} else if field.isMap() {
g.P(`func (checker *` + msg.checkerName(g) + `) With` + field.GoName + `(check ` + typeName + `) *` + msg.checkerName(g) + `{
checker.` + field.GoName + ` = check`)
} else if field.isEnum() {
enumIdent := common.TetragonApiIdent(g, field.Enum.GoIdent.GoName)
g.P(`func (checker *` + msg.checkerName(g) + `) With` + field.GoName + `(check ` + enumIdent + `) *` + msg.checkerName(g) + `{
wrappedCheck := ` + typeName + `(check)
checker.` + field.GoName + ` = &wrappedCheck`)
} else {
g.P(`func (checker *` + msg.checkerName(g) + `) With` + field.GoName + `(check *` + typeName + `) *` + msg.checkerName(g) + `{
checker.` + field.GoName + ` = check`)
}
g.P(`return checker
}`)
return nil
}
func (field *Field) generateFrom(g *protogen.GeneratedFile, msg *CheckedMessage) error {
from, err := field.getFrom(g, msg)
if err != nil {
return err
}
g.P(from)
return nil
}
func (field *Field) getFrom(g *protogen.GeneratedFile, msg *CheckedMessage) (string, error) {
checkerVar := fmt.Sprintf("%s.%s", checkerVarName, field.GoName)
eventVar := fmt.Sprintf("%s.%s", eventVarName, field.GoName)
from, err := doGetFieldFrom(field, g, true, true, msg.checkerName(g), checkerVar, eventVar)
if err != nil {
return "", err
}
return from, nil
}
func doGetFieldFrom(field *Field, g *protogen.GeneratedFile, handleList, handleOneof bool,
checkerName, checkerVar, eventVar string) (string, error) {
kind := field.Desc.Kind()
doPrimitiveFrom := func() string {
if !field.IsInnerField && (field.isList() || field.isMap()) {
return checkerVar + ` = ` + eventVar
}
return `{
val := ` + eventVar + `
` + checkerVar + ` = &val
}`
}
doStringFrom := func() string {
fullSmatcher := common.StringMatcherIdent(g, "Full")
return checkerVar + ` = ` + fullSmatcher + `(` + eventVar + `)`
}
doBytesFrom := func() string {
fullBmatcher := common.BytesMatcherIdent(g, "Full")
return checkerVar + ` = ` + fullBmatcher + `(` + eventVar + `)`
}
doLabelsFrom := func() string {
return "// TODO from labels"
}
doOneofFrom := func(oneof *protogen.Oneof) (string, error) {
innerFrom, err := doGetFieldFrom(field, g, handleList, false, checkerName, checkerVar, fmt.Sprintf("event.%s", field.GoName))
if err != nil {
return "", err
}
innerType := common.TetragonApiIdent(g, field.GoIdent.GoName)
return `switch event := ` + fmt.Sprintf("%s.%s", eventVarName, oneof.GoName) + `.(type) {
case * ` + innerType + `:
` + innerFrom + `
}`, nil
}
doListFrom := func() (string, error) {
matchKind := common.ListMatcherIdent(g, "Ordered")
typeName, err := field.typeName(g)
if err != nil {
return "", err
}
innerFrom, err := doGetFieldFrom(field, g, false, handleOneof, checkerName, "convertedCheck", "check")
if err != nil {
return "", err
}
innerType, err := field.typeName(g)
if err != nil {
return "", err
}
innerType = strings.TrimPrefix(innerType, "[]")
return `{
var checks ` + typeName + `
for _, check := range ` + eventVar + ` {
var convertedCheck ` + innerType + `
` + innerFrom + `
checks = append(checks, convertedCheck)
}
lm := ` + field.newListCheckerName(g) + `().WithOperator(` + matchKind + `).
WithValues(checks...)
` + checkerVar + ` = lm
}`, nil
}
doWrapperFrom := func() string {
return `if ` + eventVar + ` != nil {
val := ` + eventVar + `.Value
` + checkerVar + ` = &val
}`
}
doDurationFrom := func() string {
return `// NB: We don't want to match durations for now
` + checkerVar + ` = nil`
}
doTimestampFrom := func() string {
return `// NB: We don't want to match timestamps for now
` + checkerVar + ` = nil`
}
doCheckerFrom := func() string {
newCall := fmt.Sprintf("New%sChecker()", field.Message.GoIdent.GoName)
typeImportPath := string(field.Message.GoIdent.GoImportPath)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
newCall = g.QualifiedGoIdent(protogen.GoIdent{
GoName: newCall,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return `if ` + eventVar + ` != nil {
` + checkerVar + `= ` + newCall + `.From` +
field.Message.GoIdent.GoName + `(` + eventVar + `)
}`
}
doEnumFrom := func() string {
typeImportPath := string(field.Enum.GoIdent.GoImportPath)
newCall := fmt.Sprintf("New%sChecker", field.Enum.GoIdent.GoName)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
newCall = g.QualifiedGoIdent(protogen.GoIdent{
GoName: newCall,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return checkerVar + `= ` + newCall + `(` + eventVar + `)`
}
// Pod.Labels is a special case
if field.GoIdent.GoName == "Pod_Labels" {
return doLabelsFrom(), nil
}
if handleOneof && field.Oneof != nil {
return doOneofFrom(field.Oneof)
}
if handleList && field.Desc.IsList() {
return doListFrom()
}
if handleList && field.Desc.IsMap() {
return "// TODO: implement fromMap", nil
}
switch kind {
case protoreflect.BoolKind,
protoreflect.Int32Kind,
protoreflect.Sint32Kind,
protoreflect.Uint32Kind,
protoreflect.Int64Kind,
protoreflect.Sint64Kind,
protoreflect.Uint64Kind,
protoreflect.FloatKind,
protoreflect.DoubleKind:
return doPrimitiveFrom(), nil
case protoreflect.BytesKind:
return doBytesFrom(), nil
case protoreflect.StringKind:
return doStringFrom(), nil
case protoreflect.MessageKind:
if field.Message.GoIdent.GoImportPath == imports.WrappersPath {
return doWrapperFrom(), nil
} else if field.Message.GoIdent.GoImportPath == imports.TimestampPath {
return doTimestampFrom(), nil
} else if field.Message.GoIdent.GoImportPath == imports.DurationPath {
return doDurationFrom(), nil
} else {
return doCheckerFrom(), nil
}
case protoreflect.EnumKind:
return doEnumFrom(), nil
default:
return "", fmt.Errorf("Unhandled field type %s (please edit doGetFieldFrom in field.go)", kind)
}
}
func (field *Field) generateFieldCheck(g *protogen.GeneratedFile, msg *CheckedMessage) error {
checkerVar := fmt.Sprintf("%s.%s", checkerVarName, field.GoName)
eventVar := fmt.Sprintf("%s.%s", eventVarName, field.GoName)
check, err := field.getFieldCheck(g, msg.checkerName(g), checkerVar, eventVar)
if err != nil {
return err
}
if !field.isMap() {
check = `if ` + checkerVar + ` != nil {
` + check + `
}`
}
g.P(check)
return nil
}
func (field *Field) getFieldCheck(g *protogen.GeneratedFile, checkerName, checkerVar, eventVar string) (string, error) {
if field.Oneof != nil {
return checkForOneof(g, field, checkerName, checkerVar)
}
if field.isList() {
return `if err := ` + checkerVar + `.Check(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`, nil
}
if field.isMap() {
// Wrap the check in its own scope so we can redeclare variables
check, err := checkForMap(g, field, checkerName, checkerVar, eventVar)
check = "{" + check + "}"
return check, err
}
return checkForKind(g, field, checkerVar, eventVar)
}
// checkForMap returns the checker body for map fields and, as a special case, the
// Pod_Labels field of the Pod message.
func checkForMap(g *protogen.GeneratedFile, field *Field, checkerName, checkerVar, eventVar string) (string, error) {
// Common part of the map check
mapCheck := func(eventVar string) (string, error) {
return `var unmatched []string
matched := make(map[string]struct{})
for key, value := range ` + eventVar + ` {
if len(` + checkerVar + `) > 0 {
// Attempt to grab the matcher for this key
if matcher, ok := ` + checkerVar + `[key]; ok {
if err := matcher.Match(value); err != nil {
return ` + common.FmtErrorf(g, field.GoName+"[%s] (%s=%s) check failed: %w", "key", "key", "value", "err") + `
}
matched[key] = struct{}{}
}
}
}
// See if we have any unmatched values that we wanted to match
if len(matched) != len(` + checkerVar + `) {
for k := range ` + checkerVar + ` {
if _, ok := matched[k]; !ok {
unmatched = append(unmatched, k)
}
}
return ` + common.FmtErrorf(g, field.GoName+" unmatched: %v", "unmatched") + `
}`, nil
}
// Specific to Pod_Labels which needs to be converted into a map
if field.GoIdent.GoName == "Pod_Labels" {
splitN := common.GoIdent(g, "strings", "SplitN")
preamble := `values := make(map[string]string)
for _, s := range ` + eventVar + ` {
// Split out key,value pair
kv := ` + splitN + `(s, "=", 2)
if len(kv) != 2 {
// If we wanted to match an invalid label, error out
if _, ok := ` + checkerVar + `[s]; ok {
return ` + common.FmtErrorf(g, checkerName+": Label %s is in an invalid format (want key=value)", "s") + `
}
continue
}
values[kv[0]] = kv[1]
}`
check, err := mapCheck("values")
if err != nil {
return "", err
}
return preamble + "\n" + check, nil
}
return mapCheck(eventVar)
}
// checkForOneof returns the event checker body for a Oneof.
func checkForOneof(g *protogen.GeneratedFile, field *Field, checkerName string, checkerVar string) (string, error) {
inner, err := checkForKind(g, field, checkerVar, fmt.Sprintf("event.%s", field.GoName))
if err != nil {
return "", err
}
fieldIdent := common.TetragonApiIdent(g, field.GoIdent.GoName)
return `switch event := ` + fmt.Sprintf("%s.%s", eventVarName, field.Oneof.GoName) + `.(type) {
case *` + fieldIdent + `:
` + inner + `
default:
return ` + common.FmtErrorf(g, checkerName+": "+field.GoName+" check failed: %T is not a "+field.GoName, "event") + `
}`, nil
}
// checkForKind returns the event checker body based on the field's protogen kind. For
// maps and oneofs, use check
func checkForKind(g *protogen.GeneratedFile, field *Field, checkerVar, eventVar string) (string, error) {
kind := field.Desc.Kind()
// primitive types
doPrimitiveCheck := func() string {
ff := kindToFormat(kind)
if field.IsInnerField {
return `if ` + checkerVar + ` != ` + eventVar + ` {
return ` + common.FmtErrorf(g, field.GoName+" has value "+ff+" which does not match expected value "+ff, eventVar, checkerVar) + `
}`
}
return `if *` + checkerVar + ` != ` + eventVar + ` {
return ` + common.FmtErrorf(g, field.GoName+" has value "+ff+" which does not match expected value "+ff, eventVar, "*"+checkerVar) + `
}`
}
// protobuf wrapper types
doWrapperCheck := func() string {
ff := kindToFormat(kind)
wrapperVal := fmt.Sprintf("%s.Value", eventVar)
return `if ` + eventVar + ` == nil {
return ` + common.FmtErrorf(g, field.GoName+" is nil and does not match expected value "+ff, "*"+checkerVar) + `
}
if *` + checkerVar + ` != ` + wrapperVal + ` {
return ` + common.FmtErrorf(g, field.GoName+" has value "+ff+" which does not match expected value "+ff, wrapperVal, "*"+checkerVar) + `
}`
}
doCheckerCheck := func() string {
return `if err := ` + checkerVar + `.Check(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
doEnumCheck := func() string {
return `if err := ` + checkerVar + `.Check(&` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
doStringCheck := func() string {
return `if err := ` + checkerVar + `.Match(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
doBytesCheck := func() string {
return `if err := ` + checkerVar + `.Match(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
doTimestampCheck := func() string {
return `if err := ` + checkerVar + `.Match(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
doDurationCheck := func() string {
return `if err := ` + checkerVar + `.Match(` + eventVar + `); err != nil {
return ` + common.FmtErrorf(g, field.GoName+" check failed: %w", "err") + `
}`
}
switch kind {
case protoreflect.BoolKind,
protoreflect.Int32Kind,
protoreflect.Sint32Kind,
protoreflect.Uint32Kind,
protoreflect.Int64Kind,
protoreflect.Sint64Kind,
protoreflect.Uint64Kind,
protoreflect.FloatKind,
protoreflect.DoubleKind:
return doPrimitiveCheck(), nil
case protoreflect.BytesKind:
return doBytesCheck(), nil
case protoreflect.StringKind:
return doStringCheck(), nil
case protoreflect.MessageKind:
if field.Message.GoIdent.GoImportPath == imports.WrappersPath {
return doWrapperCheck(), nil
} else if field.Message.GoIdent.GoImportPath == imports.TimestampPath {
return doTimestampCheck(), nil
} else if field.Message.GoIdent.GoImportPath == imports.DurationPath {
return doDurationCheck(), nil
} else {
return doCheckerCheck(), nil
}
case protoreflect.EnumKind:
return doEnumCheck(), nil
default:
return "", fmt.Errorf("Unhandled field type %s (please edit checkForKind in field.go)", kind)
}
}
// A cache of list checkers we have already generated in order to prevent one from being
// generated twice for the same type
var generatedListChecks = make(map[string]struct{})
func (field *Field) generateListMatcher(g *protogen.GeneratedFile) error {
// Get the name of the underlying identifier
var varIdent string
if msg := field.Message; msg != nil {
typeImportPath := string(msg.GoIdent.GoImportPath)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
// NB: not one of our types, skip it
return nil
}
varIdent = common.TetragonApiIdent(g, msg.GoIdent.GoName)
} else if enum := field.Enum; enum != nil {
typeImportPath := string(enum.GoIdent.GoImportPath)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
// NB: not one of our types, skip it
return nil
}
varIdent = common.TetragonApiIdent(g, enum.GoIdent.GoName)
} else {
varIdent = field.kind().String()
}
if !field.isEnum() && !field.isPrimitive() && field.kind() != protoreflect.StringKind {
varIdent = "*" + varIdent
}
// Get the name of the underlying checker
var checkerName string
if name, err := field.typeName(g); err == nil {
checkerName = name
} else {
return err
}
// Get the name of the list checker
listCheckerName := field.listCheckerName(g)
// Determine if we need to generate a checker still
if _, ok := generatedListChecks[varIdent]; ok {
return nil
}
generatedListChecks[varIdent] = struct{}{}
listCheckerKind := common.ListMatcherIdent(g, "Operator")
kindOrdered := common.ListMatcherIdent(g, "Ordered")
kindUnordered := common.ListMatcherIdent(g, "Unordered")
KindSubset := common.ListMatcherIdent(g, "Subset")
// Generate struct
g.P(`// ` + listCheckerName + ` checks a list of ` + varIdent + ` fields
type ` + listCheckerName + ` struct {
Operator ` + listCheckerKind + ` ` + common.StructTag("json:\"operator\"") + `
Values ` + checkerName + ` ` + common.StructTag("json:\"values\"") + `
}`)
// Generate NewListMatcher
g.P(`// New` + listCheckerName + ` creates a new ` + listCheckerName + `. The checker defaults to a subset checker unless otherwise specified using WithOperator()
func New` + listCheckerName + `() *` + listCheckerName + `{
return &` + listCheckerName + ` {
Operator: ` + KindSubset + `,
}
}`)
// Generate WithOperator
g.P(`// WithOperator sets the match kind for the ` + listCheckerName + `
func (checker *` + listCheckerName + `) WithOperator(operator ` + listCheckerKind + `) *` + listCheckerName + `{
checker.Operator = operator
return checker
}`)
// Generate WithValues
checkerNameVarArgs := "..." + strings.TrimPrefix(checkerName, "[]")
g.P(`// WithValues sets the checkers that the ` + listCheckerName + ` should use
func (checker *` + listCheckerName + `) WithValues(values ` + checkerNameVarArgs + `) *` + listCheckerName + `{
checker.Values = values
return checker
}`)
// Generate Check
g.P(`// Check checks a list of ` + varIdent + ` fields
func (checker *` + listCheckerName + `) Check(values []` + varIdent + `) error {
switch checker.Operator {
case ` + kindOrdered + `:
return checker.orderedCheck(values)
case ` + kindUnordered + `:
return checker.unorderedCheck(values)
case ` + KindSubset + `:
return checker.subsetCheck(values)
default:
return ` + common.FmtErrorf(g, "Unhandled ListMatcher operator %s", "checker.Operator") + `
}
}`)
var innerCheck string
var err error
innerField := &Field{Field: field.Field, IsInnerField: true}
innerCheck, err = innerField.getFieldCheck(g, listCheckerName, "check", "value")
if err != nil {
return err
}
innerCheckFn := `func(check ` + strings.TrimPrefix(checkerName, "[]") + `, value ` + varIdent + `) error {
` + innerCheck + `
return nil
}`
// Generate orderedCheck
g.P(`// orderedCheck checks a list of ordered ` + varIdent + ` fields
func (checker *` + listCheckerName + `) orderedCheck(values []` + varIdent + `) error {
innerCheck := ` + innerCheckFn + `
if len(checker.Values) != len(values) {
return ` + common.FmtErrorf(g, listCheckerName+": Wanted %d elements, got %d", "len(checker.Values)", "len(values)") + `
}
for i, check := range checker.Values {
value := values[i]
if err := innerCheck(check, value); err != nil {
return ` + common.FmtErrorf(g, listCheckerName+": Check failed on element %d: %w", "i", "err") + `
}
}
return nil
}`)
// Generate unorderedCheck
g.P(`// unorderedCheck checks a list of unordered ` + varIdent + ` fields
func (checker *` + listCheckerName + `) unorderedCheck(values []` + varIdent + `) error {
if len(checker.Values) != len(values) {
return ` + common.FmtErrorf(g, listCheckerName+": Wanted %d elements, got %d", "len(checker.Values)", "len(values)") + `
}
return checker.subsetCheck(values)
}`)
// Generate subsetCheck
g.P(`// subsetCheck checks a subset of ` + varIdent + ` fields
func (checker *` + listCheckerName + `) subsetCheck(values []` + varIdent + `) error {
innerCheck := ` + innerCheckFn + `
numDesired := len(checker.Values)
numMatched := 0
nextCheck:
for _, check := range checker.Values {
for _, value := range values {
if err := innerCheck(check, value); err == nil {
numMatched += 1
continue nextCheck
}
}
}
if numMatched < numDesired {
return ` + common.FmtErrorf(g, listCheckerName+": Check failed, only matched %d elements but wanted %d", "numMatched", "numDesired") + `
}
return nil
}`)
return nil
}
func (field *Field) name() string {
return field.GoName
}
func (field *Field) listCheckerName(g *protogen.GeneratedFile) string {
if msg := field.Message; msg != nil {
typeImportPath := string(field.Message.GoIdent.GoImportPath)
ret := fmt.Sprintf("%sListMatcher", msg.GoIdent.GoName)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
ret = g.QualifiedGoIdent(protogen.GoIdent{
GoName: ret,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return ret
} else if enum := field.Enum; enum != nil {
typeImportPath := string(field.Enum.GoIdent.GoImportPath)
ret := fmt.Sprintf("%sListMatcher", enum.GoIdent.GoName)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
ret = g.QualifiedGoIdent(protogen.GoIdent{
GoName: ret,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return ret
}
varIdent := field.kind().String()
return fmt.Sprintf("%sListMatcher", strcase.ToCamel(varIdent))
}
func (field *Field) newListCheckerName(g *protogen.GeneratedFile) string {
if msg := field.Message; msg != nil {
typeImportPath := string(field.Message.GoIdent.GoImportPath)
ret := fmt.Sprintf("New%sListMatcher", msg.GoIdent.GoName)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
ret = g.QualifiedGoIdent(protogen.GoIdent{
GoName: ret,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return ret
} else if enum := field.Enum; enum != nil {
typeImportPath := string(field.Enum.GoIdent.GoImportPath)
ret := fmt.Sprintf("New%sListMatcher", enum.GoIdent.GoName)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
ret = g.QualifiedGoIdent(protogen.GoIdent{
GoName: ret,
GoImportPath: protogen.GoImportPath(importPath),
})
}
return ret
}
varIdent := field.kind().String()
return fmt.Sprintf("New%sListMatcher", strcase.ToCamel(varIdent))
}
func (field *Field) kind() protoreflect.Kind {
kind := field.Desc.Kind()
switch kind {
case protoreflect.MessageKind:
if field.Message.GoIdent.GoImportPath == imports.WrappersPath {
switch field.Message.GoIdent.GoName {
case "BoolValue":
return protoreflect.BoolKind
case "Int32Value":
return protoreflect.Int32Kind
case "Int64Value":
return protoreflect.Int64Kind
case "UInt32Value":
return protoreflect.Uint32Kind
case "UInt64Value":
return protoreflect.Uint64Kind
case "StringValue":
return protoreflect.StringKind
case "DoubleValue":
return protoreflect.DoubleKind
case "FloatValue":
return protoreflect.FloatKind
}
}
}
return kind
}
func (field *Field) isPrimitive() bool {
kind := field.kind()
switch kind {
case protoreflect.BoolKind,
protoreflect.Int32Kind,
protoreflect.Sint32Kind,
protoreflect.Uint32Kind,
protoreflect.Int64Kind,
protoreflect.Sint64Kind,
protoreflect.Uint64Kind,
protoreflect.FloatKind,
protoreflect.DoubleKind:
return true
}
return false
}
func (field *Field) isList() bool {
if field.IsInnerField {
return false
}
if field.GoIdent.GoName == "Pod_Labels" {
return false
}
return field.Desc.IsList()
}
func (field *Field) isMap() bool {
if field.IsInnerField {
return false
}
if field.GoIdent.GoName == "Pod_Labels" {
return true
}
return field.Desc.IsMap()
}
func (field *Field) isEnum() bool {
return field.Enum != nil
}
func (field *Field) jsonTag() string {
return fmt.Sprintf("json:\"%s,omitempty\"", field.Desc.JSONName())
}
func (field *Field) typeName(g *protogen.GeneratedFile) (string, error) {
kind := field.kind()
// Pod.Labels is a special case
if field.GoIdent.GoName == "Pod_Labels" {
smatcher := common.StringMatcherIdent(g, "StringMatcher")
return fmt.Sprintf("map[string]%s", smatcher), nil
}
var type_ string
switch kind {
case protoreflect.BoolKind,
protoreflect.Int32Kind,
protoreflect.Sint32Kind,
protoreflect.Uint32Kind,
protoreflect.Int64Kind,
protoreflect.Sint64Kind,
protoreflect.Uint64Kind,
protoreflect.FloatKind,
protoreflect.DoubleKind:
type_ = kind.String()
case protoreflect.BytesKind:
bmatcher := common.BytesMatcherIdent(g, "BytesMatcher")
type_ = bmatcher
case protoreflect.StringKind:
smatcher := common.StringMatcherIdent(g, "StringMatcher")
type_ = smatcher
case protoreflect.MessageKind:
if field.Message.GoIdent.GoImportPath == imports.TimestampPath {
tsmatcher := common.TimestampMatcherIdent(g, "TimestampMatcher")
type_ = tsmatcher
} else if field.Message.GoIdent.GoImportPath == imports.DurationPath {
dmatcher := common.DurationMatcherIdent(g, "DurationMatcher")
type_ = dmatcher
} else {
type_ = fmt.Sprintf("%sChecker", field.Message.GoIdent.GoName)
typeImportPath := string(field.Message.GoIdent.GoImportPath)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
type_ = g.QualifiedGoIdent(protogen.GoIdent{
GoName: type_,
GoImportPath: protogen.GoImportPath(importPath),
})
}
}
case protoreflect.EnumKind:
type_ = fmt.Sprintf("%sChecker", field.Enum.GoIdent.GoName)
typeImportPath := string(field.Enum.GoIdent.GoImportPath)
if !strings.HasPrefix(typeImportPath, common.TetragonPackageName) {
importPath := filepath.Join(typeImportPath, "codegen", "eventchecker")
type_ = g.QualifiedGoIdent(protogen.GoIdent{
GoName: type_,
GoImportPath: protogen.GoImportPath(importPath),
})
}
default:
return "", fmt.Errorf("Unhandled field type %s (please edit checkerTypeName in field.go)", kind)
}
if field.isMap() {
if field.Desc.MapKey().Kind() != protoreflect.StringKind {
return "", fmt.Errorf("maps without string keys are not supported")
}
if field.Desc.MapValue().Kind() != protoreflect.StringKind {
return "", fmt.Errorf("maps without string values are not supported")
}
return fmt.Sprintf("map[string]%s", common.StringMatcherIdent(g, "StringMatcher")), nil
} else if field.isList() {
if field.isPrimitive() {
return fmt.Sprintf("[]%s", type_), nil
}
return fmt.Sprintf("[]*%s", type_), nil
}
return type_, nil
}
func kindToFormat(k protoreflect.Kind) string {
switch k {
case protoreflect.Int32Kind,
protoreflect.Sint32Kind,
protoreflect.Uint32Kind,
protoreflect.Int64Kind,
protoreflect.Sint64Kind,
protoreflect.Uint64Kind:
return "%d"
case protoreflect.BoolKind:
return "%t"
case protoreflect.FloatKind, protoreflect.DoubleKind:
return "%f"
case protoreflect.StringKind:
return "%s"
default:
return "%v"
}
}