/
utils.go
67 lines (63 loc) · 1.36 KB
/
utils.go
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package visitors
import (
"bytes"
"context"
"go/ast"
"go/format"
"go/parser"
"go/token"
"golang.org/x/tools/go/packages"
"io/ioutil"
"os"
)
func GetFile(fileath string, v ast.Visitor) (string, error) {
file, err := os.Open(fileath)
if err != nil {
return "", err
}
defer file.Close()
fileByes, err := ioutil.ReadAll(file)
if err != nil {
return "", err
}
fSet := token.NewFileSet() // 职位相对于fset
f, err := parser.ParseFile(fSet, "", string(fileByes), 0)
if err != nil {
return "", err
}
cMap := ast.NewCommentMap(fSet, f, f.Comments)
ast.Walk(v, f)
f.Comments = cMap.Filter(f).Comments()
var buf bytes.Buffer
if err = format.Node(&buf, fSet, f); err != nil {
return "", err
}
return string(buf.Bytes()), nil
}
func Load(ctx context.Context, wd string, env []string, patterns []string) ([]*packages.Package, []error) {
cfg := &packages.Config{
Context: ctx,
Mode: packages.LoadAllSyntax,
Dir: wd,
Env: env,
BuildFlags: []string{},
}
escaped := make([]string, len(patterns))
for i := range patterns {
escaped[i] = "pattern=" + patterns[i]
}
pkgs, err := packages.Load(cfg, escaped...)
if err != nil {
return nil, []error{err}
}
var errs []error
for _, p := range pkgs {
for _, e := range p.Errors {
errs = append(errs, e)
}
}
if len(errs) > 0 {
return nil, errs
}
return pkgs, nil
}