github.com/solo-io/cue@v0.4.7/encoding/protobuf/util.go (about)

     1  // Copyright 2019 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package protobuf
    16  
    17  import (
    18  	"strings"
    19  	"text/scanner"
    20  
    21  	"github.com/emicklei/proto"
    22  	"golang.org/x/xerrors"
    23  
    24  	"github.com/solo-io/cue/cue/ast"
    25  	"github.com/solo-io/cue/cue/token"
    26  )
    27  
    28  // failf panics with a marked error that can be intercepted upon returning
    29  // from parsing.
    30  func failf(pos scanner.Position, format string, args ...interface{}) {
    31  	panic(protoError{pos, xerrors.Errorf(format, args...)})
    32  }
    33  
    34  func fail(pos scanner.Position, err error) {
    35  	panic(protoError{pos, err})
    36  }
    37  
    38  type protoError struct {
    39  	pos scanner.Position
    40  	error
    41  }
    42  
    43  var (
    44  	newline    = token.Newline.Pos()
    45  	newSection = token.NewSection.Pos()
    46  )
    47  
    48  func addComments(f ast.Node, i int, doc, inline *proto.Comment) bool {
    49  	cg := comment(doc, true)
    50  	if cg != nil && len(cg.List) > 0 && i > 0 {
    51  		cg.List[0].Slash = newSection
    52  	}
    53  	f.AddComment(cg)
    54  	f.AddComment(comment(inline, false))
    55  	return doc != nil
    56  }
    57  
    58  func comment(c *proto.Comment, doc bool) *ast.CommentGroup {
    59  	if c == nil || len(c.Lines) == 0 {
    60  		return nil
    61  	}
    62  	cg := &ast.CommentGroup{}
    63  	if doc {
    64  		cg.Doc = true
    65  	} else {
    66  		cg.Line = true
    67  		cg.Position = 10
    68  	}
    69  	for _, s := range c.Lines {
    70  		s = strings.TrimRight(s, " ")
    71  		cg.List = append(cg.List, &ast.Comment{Text: "//" + s})
    72  	}
    73  	return cg
    74  }
    75  
    76  func labelName(s string) string {
    77  	split := strings.Split(s, "_")
    78  	for i := 1; i < len(split); i++ {
    79  		split[i] = strings.Title(split[i])
    80  	}
    81  	return strings.Join(split, "")
    82  }