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// Copyright 2024 Google LLC
//
// 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 yamlfmt
import (
"fmt"
"os"
"slices"
"github.com/google/yamlfmt/internal/collections"
"github.com/google/yamlfmt/internal/multilinediff"
)
type Operation int
const (
OperationFormat Operation = iota
OperationLint
OperationDry
OperationStdin
OperationPrintConfig
)
type Engine interface {
FormatContent(content []byte) ([]byte, error)
Format(paths []string) (fmt.Stringer, error)
Lint(paths []string) (fmt.Stringer, error)
DryRun(paths []string) (fmt.Stringer, error)
}
type FormatDiff struct {
Original string
Formatted string
LineSep string
}
func (d *FormatDiff) MultilineDiff() (string, int) {
return multilinediff.Diff(d.Original, d.Formatted, d.LineSep)
}
func (d *FormatDiff) Changed() bool {
return d.Original != d.Formatted
}
type FileDiff struct {
Path string
Diff *FormatDiff
}
func (fd *FileDiff) StrOutput() string {
diffStr, _ := fd.Diff.MultilineDiff()
return fmt.Sprintf("%s:\n%s\n", fd.Path, diffStr)
}
func (fd *FileDiff) StrOutputQuiet() string {
return fd.Path + "\n"
}
func (fd *FileDiff) Apply() error {
// If there is no diff in the format, there is no need to write the file.
if !fd.Diff.Changed() {
return nil
}
return os.WriteFile(fd.Path, []byte(fd.Diff.Formatted), 0644)
}
type FileDiffs map[string]*FileDiff
func (fds FileDiffs) Add(diff *FileDiff) error {
if _, ok := fds[diff.Path]; ok {
return fmt.Errorf("a diff for %s already exists", diff.Path)
}
fds[diff.Path] = diff
return nil
}
func (fds FileDiffs) StrOutput() string {
result := ""
sortedPaths := fds.sortedPaths()
for _, path := range sortedPaths {
fd := fds[path]
if fd.Diff.Changed() {
result += fd.StrOutput()
}
}
return result
}
func (fds FileDiffs) StrOutputQuiet() string {
result := ""
sortedPaths := fds.sortedPaths()
for _, path := range sortedPaths {
fd := fds[path]
if fd.Diff.Changed() {
result += fd.StrOutputQuiet()
}
}
return result
}
func (fds FileDiffs) ApplyAll() error {
applyErrs := make(collections.Errors, len(fds))
i := 0
for _, diff := range fds {
applyErrs[i] = diff.Apply()
i++
}
return applyErrs.Combine()
}
func (fds FileDiffs) ChangedCount() int {
changed := 0
for _, fd := range fds {
if fd.Diff.Changed() {
changed++
}
}
return changed
}
func (fds FileDiffs) sortedPaths() []string {
pathKeys := []string{}
for path := range fds {
pathKeys = append(pathKeys, path)
}
slices.Sort(pathKeys)
return pathKeys
}
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