/
gomod.go
177 lines (155 loc) · 3.85 KB
/
gomod.go
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package goven
import (
"fmt"
"go/format"
"go/parser"
"go/token"
"golang.org/x/mod/modfile"
"io/ioutil"
"os"
"path/filepath"
"strings"
)
type Gomod struct {
File *modfile.File
modulePath string
ModuleName string
newModuleName string
moduleRenames map[string]string
moduleRequireDrops map[string]any
moduleReplaceDrops map[string]string
}
func OpenModfile(modulePath, modFilename string) (*Gomod, error) {
file, err := ReadModfile(filepath.Join(modulePath, modFilename))
if err != nil {
return nil, err
}
return &Gomod{
file,
modulePath,
file.Module.Mod.Path,
"",
map[string]string{},
map[string]any{},
map[string]string{},
}, nil
}
func (mod *Gomod) Rename(name string) {
mod.newModuleName = name
}
func (mod *Gomod) RenameSubmodule(oldName, newName string) {
mod.moduleRenames[oldName] = newName
}
func (mod *Gomod) DropRequire(moduleName string) {
mod.moduleRequireDrops[moduleName] = true
}
func (mod *Gomod) IsRequireDropped(moduleName string) bool {
_, found := mod.moduleRequireDrops[moduleName]
return found
}
func (mod *Gomod) DropReplace(moduleName, version string) {
mod.moduleReplaceDrops[moduleName] = version
}
func (mod *Gomod) Save(modFilename string) error {
err := renameModules(mod.modulePath, mod.moduleRenames)
if err != nil {
return err
}
if mod.newModuleName != "" {
err := renameModules(mod.modulePath, map[string]string{mod.ModuleName: mod.newModuleName})
if err != nil {
return err
}
}
for moduleName, version := range mod.moduleReplaceDrops {
err := mod.File.DropReplace(moduleName, version)
if err != nil {
return err
}
}
for require := range mod.moduleRequireDrops {
err := mod.File.DropRequire(require)
if err != nil {
return err
}
}
if mod.newModuleName != "" {
err := mod.File.AddModuleStmt(mod.newModuleName)
if err != nil {
return err
}
}
err = writeModfile(mod.File, filepath.Join(mod.modulePath, modFilename))
if err != nil {
return err
}
return nil
}
func ReadModfile(gomodPath string) (*modfile.File, error) {
buf, err := ioutil.ReadFile(gomodPath)
if err != nil {
return nil, err
}
gomod, err := modfile.Parse(gomodPath, buf, nil)
if err != nil {
return nil, err
}
return gomod, nil
}
func writeModfile(file *modfile.File, path string) error {
file.Cleanup()
data, err := file.Format()
if err != nil {
return err
}
err = ioutil.WriteFile(path, data, 0644)
if err != nil {
return err
}
return nil
}
func renameModules(modulePath string, renames map[string]string) error {
filenamePatterns := []string{"*.go"}
var err = filepath.Walk(modulePath, func(path string, info os.FileInfo, err error) error {
if err != nil {
return fmt.Errorf(`failed to replace in path "%s" - %s`, path, err.Error())
}
if !info.IsDir() {
_, filename := filepath.Split(path)
match, err1 := MatchesAny(filenamePatterns, filename)
if err1 != nil {
return err1
}
if match {
return renameInFile(path, renames)
}
}
return nil
})
return err
}
func renameInFile(path string, renames map[string]string) error {
fset := token.NewFileSet()
ast, err := parser.ParseFile(fset, path, nil, parser.ParseComments)
if err != nil {
return fmt.Errorf(`failed to parse file "%s" - %s`, path, err.Error())
}
for oldName, newName := range renames {
for _, imp := range ast.Imports {
if imp.Path.Value == fmt.Sprintf(`"%s"`, oldName) || strings.HasPrefix(imp.Path.Value, fmt.Sprintf(`"%s/`, oldName)) {
newPathValue := `"` + newName + strings.TrimPrefix(imp.Path.Value, `"`+oldName)
imp.Path.Value = newPathValue
}
}
}
f, err := os.Create(path)
if err != nil {
return fmt.Errorf(`failed to code in file "%s" - %s`, path, err.Error())
}
err = format.Node(f, fset, ast)
if err != nil {
return fmt.Errorf(`failed to write modified imports code to file "%s" - %s`, path, err.Error())
}
defer f.Close()
return nil
}