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bufanalysis.go
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bufanalysis.go
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// Copyright 2020-2023 Buf Technologies, Inc.
//
// 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 bufanalysis
import (
"crypto/sha256"
"fmt"
"io"
"sort"
"strconv"
"strings"
)
const (
// FormatText is the text format for FileAnnotations.
FormatText Format = iota + 1
// FormatJSON is the JSON format for FileAnnotations.
FormatJSON
// FormatMSVS is the MSVS format for FileAnnotations.
FormatMSVS
// FormatJUnit is the JUnit format for FileAnnotations.
FormatJUnit
)
var (
// AllFormatStrings is all format strings without aliases.
//
// Sorted in the order we want to display them.
AllFormatStrings = []string{
"text",
"json",
"msvs",
"junit",
}
// AllFormatStringsWithAliases is all format strings with aliases.
//
// Sorted in the order we want to display them.
AllFormatStringsWithAliases = []string{
"text",
"gcc",
"json",
"msvs",
"junit",
}
stringToFormat = map[string]Format{
"text": FormatText,
// alias for text
"gcc": FormatText,
"json": FormatJSON,
"msvs": FormatMSVS,
"junit": FormatJUnit,
}
formatToString = map[Format]string{
FormatText: "text",
FormatJSON: "json",
FormatMSVS: "msvs",
FormatJUnit: "junit",
}
)
// Format is a FileAnnotation format.
type Format int
// String implements fmt.Stringer.
func (f Format) String() string {
s, ok := formatToString[f]
if !ok {
return strconv.Itoa(int(f))
}
return s
}
// ParseFormat parses the Format.
//
// The empty strings defaults to FormatText.
func ParseFormat(s string) (Format, error) {
s = strings.ToLower(strings.TrimSpace(s))
if s == "" {
return FormatText, nil
}
f, ok := stringToFormat[s]
if ok {
return f, nil
}
return 0, fmt.Errorf("unknown format: %q", s)
}
// FileInfo is a minimal FileInfo interface.
type FileInfo interface {
Path() string
ExternalPath() string
}
// FileAnnotation is a file annotation.
type FileAnnotation interface {
// Stringer returns the string representation of this annotation.
fmt.Stringer
// FileInfo is the FileInfo for this annotation.
//
// This may be nil.
FileInfo() FileInfo
// StartLine is the starting line.
//
// If the starting line is not known, this will be 0.
StartLine() int
// StartColumn is the starting column.
//
// If the starting column is not known, this will be 0.
StartColumn() int
// EndLine is the ending line.
//
// If the ending line is not known, this will be 0.
// If the ending line is the same as the starting line, this will be explicitly
// set to the same value as start_line.
EndLine() int
// EndColumn is the ending column.
//
// If the ending column is not known, this will be 0.
// If the ending column is the same as the starting column, this will be explicitly
// set to the same value as start_column.
EndColumn() int
// Type is the type of annotation, typically an ID representing a failure type.
Type() string
// Message is the message of the annotation.
Message() string
}
// NewFileAnnotation returns a new FileAnnotation.
func NewFileAnnotation(
fileInfo FileInfo,
startLine int,
startColumn int,
endLine int,
endColumn int,
typeString string,
message string,
) FileAnnotation {
return newFileAnnotation(
fileInfo,
startLine,
startColumn,
endLine,
endColumn,
typeString,
message,
)
}
// SortFileAnnotations sorts the FileAnnotations.
//
// The order of sorting is:
//
// ExternalPath
// StartLine
// StartColumn
// Type
// Message
// EndLine
// EndColumn
func SortFileAnnotations(fileAnnotations []FileAnnotation) {
sort.Stable(sortFileAnnotations(fileAnnotations))
}
// DeduplicateAndSortFileAnnotations deduplicates the FileAnnotations based on their
// string representation and sorts them according to the order specified in SortFileAnnotations.
func DeduplicateAndSortFileAnnotations(fileAnnotations []FileAnnotation) []FileAnnotation {
deduplicated := make([]FileAnnotation, 0, len(fileAnnotations))
seen := make(map[string]struct{}, len(fileAnnotations))
for _, fileAnnotation := range fileAnnotations {
key := hash(fileAnnotation)
if _, ok := seen[key]; ok {
continue
}
seen[key] = struct{}{}
deduplicated = append(deduplicated, fileAnnotation)
}
SortFileAnnotations(deduplicated)
return deduplicated
}
// PrintFileAnnotations prints the file annotations separated by newlines.
func PrintFileAnnotations(writer io.Writer, fileAnnotations []FileAnnotation, formatString string) error {
format, err := ParseFormat(formatString)
if err != nil {
return err
}
switch format {
case FormatText:
return printAsText(writer, fileAnnotations)
case FormatJSON:
return printAsJSON(writer, fileAnnotations)
case FormatMSVS:
return printAsMSVS(writer, fileAnnotations)
case FormatJUnit:
return printAsJUnit(writer, fileAnnotations)
default:
return fmt.Errorf("unknown FileAnnotation Format: %v", format)
}
}
// hash returns a hash value that uniquely identifies the given FileAnnotation.
func hash(fileAnnotation FileAnnotation) string {
path := ""
if fileInfo := fileAnnotation.FileInfo(); fileInfo != nil {
path = fileInfo.ExternalPath()
}
hash := sha256.New()
_, _ = hash.Write([]byte(path))
_, _ = hash.Write([]byte(strconv.Itoa(fileAnnotation.StartLine())))
_, _ = hash.Write([]byte(strconv.Itoa(fileAnnotation.StartColumn())))
_, _ = hash.Write([]byte(strconv.Itoa(fileAnnotation.EndLine())))
_, _ = hash.Write([]byte(strconv.Itoa(fileAnnotation.EndColumn())))
_, _ = hash.Write([]byte(fileAnnotation.Type()))
_, _ = hash.Write([]byte(fileAnnotation.Message()))
return string(hash.Sum(nil))
}
type sortFileAnnotations []FileAnnotation
func (a sortFileAnnotations) Len() int { return len(a) }
func (a sortFileAnnotations) Swap(i int, j int) { a[i], a[j] = a[j], a[i] }
func (a sortFileAnnotations) Less(i int, j int) bool { return fileAnnotationCompareTo(a[i], a[j]) < 0 }
// fileAnnotationCompareTo returns a value less than 0 if a < b, a value
// greater than 0 if a > b, and 0 if a == b.
func fileAnnotationCompareTo(a FileAnnotation, b FileAnnotation) int {
if a == nil && b == nil {
return 0
}
if a == nil && b != nil {
return -1
}
if a != nil && b == nil {
return 1
}
aFileInfo := a.FileInfo()
bFileInfo := b.FileInfo()
if aFileInfo == nil && bFileInfo != nil {
return -1
}
if aFileInfo != nil && bFileInfo == nil {
return 1
}
if aFileInfo != nil && bFileInfo != nil {
if aFileInfo.ExternalPath() < bFileInfo.ExternalPath() {
return -1
}
if aFileInfo.ExternalPath() > bFileInfo.ExternalPath() {
return 1
}
}
if a.StartLine() < b.StartLine() {
return -1
}
if a.StartLine() > b.StartLine() {
return 1
}
if a.StartColumn() < b.StartColumn() {
return -1
}
if a.StartColumn() > b.StartColumn() {
return 1
}
if a.Type() < b.Type() {
return -1
}
if a.Type() > b.Type() {
return 1
}
if a.Message() < b.Message() {
return -1
}
if a.Message() > b.Message() {
return 1
}
if a.EndLine() < b.EndLine() {
return -1
}
if a.EndLine() > b.EndLine() {
return 1
}
if a.EndColumn() < b.EndColumn() {
return -1
}
if a.EndColumn() > b.EndColumn() {
return 1
}
return 0
}