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fixer.go
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fixer.go
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package fixers
import (
"bytes"
"errors"
"fmt"
"go/ast"
"go/format"
"go/parser"
"go/token"
)
type FixerOptions map[interface{}]interface{}
func (o FixerOptions) extractRequiredString(name string) (string, error) {
_, ok := o[name]
if !ok {
return "", errors.New(name + " option is required")
}
return o.extractString(name, "")
}
func (o FixerOptions) extractString(name string, defaultValue string) (string, error) {
v, ok := o[name]
if !ok {
return defaultValue, nil
}
value, ok := v.(string)
if !ok {
return "", errors.New("Wrong " + name + " option")
}
return value, nil
}
func (o FixerOptions) extractBool(name string, defaultValue bool) (bool, error) {
v, ok := o[name]
if !ok {
return defaultValue, nil
}
value, ok := v.(bool)
if !ok {
return false, errors.New("Wrong " + name + " option")
}
return value, nil
}
type FixerCreateFunc func(options FixerOptions) (CsFixer, error)
var FixersMap map[string]FixerCreateFunc
type CsFixer interface {
}
type Linter interface {
Lint(content string) (Problems, error)
}
type Fixer interface {
Fix(content string) (string, error)
}
type Problem struct {
Position *Position
Text string
LineText string
}
func (p *Problem) String() string {
return fmt.Sprintf("at line %v: %s", p.Position.Line, p.Text)
}
type Problems []*Problem
func NewPosition(line int) *Position {
return &Position{Line: line}
}
type Position struct {
Line int
}
func AddFixer(name string, createFunc FixerCreateFunc) {
if FixersMap == nil {
FixersMap = make(map[string]FixerCreateFunc, 0)
}
FixersMap[name] = createFunc
}
func CreateFixer(name string, options FixerOptions) (CsFixer, error) {
if createFunc, ok := FixersMap[name]; ok {
fixer, err := createFunc(options)
if err != nil {
return nil, err
}
return fixer, nil
}
return nil, nil
}
func ContentToAst(content string) (*token.FileSet, *ast.File, error) {
fset := token.NewFileSet()
file, err := parser.ParseFile(fset, "", content, parser.ParseComments)
return fset, file, err
}
func AstToContent(fset *token.FileSet, node interface{}) string {
var buf bytes.Buffer
format.Node(&buf, fset, node)
return buf.String()
}