// File parses a file at the relative path
// provided and produces a new *FileSet.
// If you pass in a path to a directory, the entire
// directory will be parsed.
// If unexport is false, only exported identifiers are included in the FileSet.
// If the resulting FileSet would be empty, an error is returned.
func File(name string, unexported bool) (*FileSet, error) {
pushstate(name)
defer popstate()
fs := &FileSet{
Specs: make(map[string]ast.Expr),
Identities: make(map[string]gen.Elem),
}
fset := token.NewFileSet()
finfo, err := os.Stat(name)
if err != nil {
return nil, err
}
if finfo.IsDir() {
pkgs, err := parser.ParseDir(fset, name, nil, parser.ParseComments)
if err != nil {
return nil, err
}
if len(pkgs) != 1 {
return nil, fmt.Errorf("multiple packages in directory: %s", name)
}
var one *ast.Package
for _, nm := range pkgs {
one = nm
break
}
fs.Package = one.Name
for _, fl := range one.Files {
pushstate(fl.Name.Name)
fs.Directives = append(fs.Directives, yieldComments(fl.Comments)...)
if !unexported {
ast.FileExports(fl)
}
fs.getTypeSpecs(fl)
popstate()
}
} else {
f, err := parser.ParseFile(fset, name, nil, parser.ParseComments)
if err != nil {
return nil, err
}
fs.Package = f.Name.Name
fs.Directives = yieldComments(f.Comments)
if !unexported {
ast.FileExports(f)
}
fs.getTypeSpecs(f)
}
if len(fs.Specs) == 0 {
return nil, fmt.Errorf("no definitions in %s", name)
}
fs.process()
fs.applyDirectives()
fs.propInline()
return fs, nil
}
// packageExports is a local implementation of ast.PackageExports
// which correctly updates each package file's comment list.
// (The ast.PackageExports signature is frozen, hence the local
// implementation).
//
func packageExports(fset *token.FileSet, pkg *ast.Package) {
for _, src := range pkg.Files {
cmap := ast.NewCommentMap(fset, src, src.Comments)
ast.FileExports(src)
src.Comments = cmap.Filter(src).Comments()
}
}
func TestLeadAndLineComments(t *testing.T) {
f, err := StdParseFile(fset, "", `
package p
type T struct {
/* F1 lead comment */
//
F1 int /* F1 */ // line comment
// F2 lead
// comment
F2 int // F2 line comment
// f3 lead comment
f3 int // f3 line comment
}
`, ParseComments)
if err != nil {
t.Fatal(err)
}
checkFieldComments(t, f, "T.F1", "/* F1 lead comment *///", "/* F1 */// line comment")
checkFieldComments(t, f, "T.F2", "// F2 lead// comment", "// F2 line comment")
checkFieldComments(t, f, "T.f3", "// f3 lead comment", "// f3 line comment")
ast.FileExports(f)
checkFieldComments(t, f, "T.F1", "/* F1 lead comment *///", "/* F1 */// line comment")
checkFieldComments(t, f, "T.F2", "// F2 lead// comment", "// F2 line comment")
if getField(f, "T.f3") != nil {
t.Error("not expected to find T.f3")
}
}
func writeImport(w io.Writer, pkg *ast.Package, pkgPath string) error {
var files []*ast.File
for _, f := range pkg.Files {
if ast.FileExports(f) {
files = append(files, f)
}
}
env := eval.MakeSimpleEnv()
env.Path = pkgPath
for _, f := range files {
for _, d := range f.Decls {
if gen, ok := d.(*ast.GenDecl); ok {
for _, s := range gen.Specs {
if v, ok := s.(*ast.ValueSpec); ok {
for _, i := range v.Names {
if gen.Tok == token.VAR {
env.Vars[i.Name] = reflect.Value{}
} else {
env.Consts[i.Name] = reflect.Value{}
}
}
} else if t, ok := s.(*ast.TypeSpec); ok {
env.Types[t.Name.Name] = nil
}
}
} else if fun, ok := d.(*ast.FuncDecl); ok && fun.Recv == nil {
env.Funcs[fun.Name.Name] = reflect.Value{}
}
}
}
return writePkg(w, env, pkg.Name)
}
// format parses src, prints the corresponding AST, verifies the resulting
// src is syntactically correct, and returns the resulting src or an error
// if any.
func format(src []byte, mode checkMode) ([]byte, error) {
// parse src
f, err := parser.ParseFile(fset, "", src, parser.ParseComments)
if err != nil {
return nil, fmt.Errorf("parse: %s\n%s", err, src)
}
// filter exports if necessary
if mode&export != 0 {
ast.FileExports(f) // ignore result
f.Comments = nil // don't print comments that are not in AST
}
// determine printer configuration
cfg := Config{Tabwidth: tabwidth}
if mode&rawFormat != 0 {
cfg.Mode |= RawFormat
}
// print AST
var buf bytes.Buffer
if err := cfg.Fprint(&buf, fset, f); err != nil {
return nil, fmt.Errorf("print: %s", err)
}
// make sure formatted output is syntactically correct
res := buf.Bytes()
if _, err := parser.ParseFile(fset, "", res, 0); err != nil {
return nil, fmt.Errorf("re-parse: %s\n%s", err, buf.Bytes())
}
return res, nil
}
func getExportedDeclarationsForFile(path string) ([]string, error) {
fset := token.NewFileSet()
tree, err := parser.ParseFile(fset, path, nil, 0)
if err != nil {
return []string{}, err
}
declarations := []string{}
ast.FileExports(tree)
for _, decl := range tree.Decls {
switch x := decl.(type) {
case *ast.GenDecl:
switch s := x.Specs[0].(type) {
case *ast.ValueSpec:
declarations = append(declarations, s.Names[0].Name)
}
case *ast.FuncDecl:
declarations = append(declarations, x.Name.Name)
}
}
return declarations, nil
}
func Prune(src []byte) ([]byte, error) {
fset := token.NewFileSet()
file, err := parser.ParseFile(fset, "", src, parser.ParseComments)
if err != nil {
return nil, err
}
ast.FileExports(file)
pruner := NewPruner()
ast.Walk(pruner, file)
file.Comments = nil
buf := bytes.Buffer{}
err = printer.Fprint(&buf, fset, file)
if err != nil {
return nil, err
}
pruned, err := ioutil.ReadAll(&buf)
return pruned, err
}
func check(t *testing.T, source, golden string, mode checkMode) {
// parse source
prog, err := parser.ParseFile(source, nil, parser.ParseComments)
if err != nil {
t.Error(err)
return
}
// filter exports if necessary
if mode&export != 0 {
ast.FileExports(prog) // ignore result
prog.Comments = nil // don't print comments that are not in AST
}
// determine printer configuration
cfg := Config{Tabwidth: tabwidth}
if mode&rawFormat != 0 {
cfg.Mode |= RawFormat
}
// format source
var buf bytes.Buffer
if _, err := cfg.Fprint(&buf, prog); err != nil {
t.Error(err)
}
res := buf.Bytes()
// update golden files if necessary
if *update {
if err := io.WriteFile(golden, res, 0644); err != nil {
t.Error(err)
}
return
}
// get golden
gld, err := io.ReadFile(golden)
if err != nil {
t.Error(err)
return
}
// compare lengths
if len(res) != len(gld) {
t.Errorf("len = %d, expected %d (= len(%s))", len(res), len(gld), golden)
}
// compare contents
for i, line, offs := 0, 1, 0; i < len(res) && i < len(gld); i++ {
ch := res[i]
if ch != gld[i] {
t.Errorf("%s:%d:%d: %s", source, line, i-offs+1, lineString(res, offs))
t.Errorf("%s:%d:%d: %s", golden, line, i-offs+1, lineString(gld, offs))
t.Error()
return
}
if ch == '\n' {
line++
offs = i + 1
}
}
}
func (sd *SchemaDSL) Parse() (err error) {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, sd.config.SchemaFile, nil, parser.ParseComments)
if err != nil {
return err
}
ast.FileExports(f)
SCHEMA_PARSE_LOOP:
for _, decl := range f.Decls {
table := ""
fields := []*ast.Field{}
if genDecl, ok := decl.(*ast.GenDecl); ok {
for _, spec := range genDecl.Specs {
if typeSpec, ok := spec.(*ast.TypeSpec); ok {
table = snaker.CamelToSnake(typeSpec.Name.Name)
if structType, ok := typeSpec.Type.(*ast.StructType); ok {
fields = structType.Fields.List
}
}
}
if genDecl.Doc != nil {
for _, doc := range genDecl.Doc.List {
if strings.HasPrefix(doc.Text, COMMENT_IGNORE_PREFIX) {
continue SCHEMA_PARSE_LOOP
}
if strings.HasPrefix(doc.Text, COMMENT_TABLE_PREFIX) {
table = strings.TrimSpace(strings.TrimPrefix(doc.Text, COMMENT_TABLE_PREFIX))
}
}
}
}
sd.Tables = append(sd.Tables, &Table{Name: table, AstFields: fields})
}
for _, table := range sd.Tables {
var primaryKeys []string
for _, field := range table.AstFields {
if field.Tag == nil {
continue
}
var typeName string
tagMap := parseTag(field.Tag.Value)
if t, ok := field.Type.(*ast.Ident); ok {
typeName = t.Name
}
if t, ok := field.Type.(*ast.SelectorExpr); ok {
x := t.X.(*ast.Ident).Name
sel := t.Sel.Name
typeName = fmt.Sprintf("%s.%s", x, sel)
}
columns, err := sd.Dialect.ConvertSql(typeName, tagMap)
if err != nil {
return err
}
table.Fields = append(table.Fields, &Field{
Name: tagMap["sql"],
Attribute: strings.Join(columns, " "),
})
if _, ok := tagMap["primary"]; ok {
primaryKeys = append(primaryKeys, tagMap["sql"])
}
if _, ok := tagMap["uniq"]; ok {
name := tagMap["uniq"]
if name == "" {
name = fmt.Sprintf("`%s_%s`", table.Name, strings.Replace(tagMap["sql"], "`", "", -1))
}
table.ParseIndex(&table.UniqueIndexes, name, tagMap["sql"])
}
if _, ok := tagMap["index"]; ok {
table.ParseIndex(&table.Indexes, tagMap["index"], tagMap["sql"])
}
}
table.PrimaryKey = strings.Join(primaryKeys, ", ")
}
return nil
}
