/
messages.go
147 lines (135 loc) · 3.28 KB
/
messages.go
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package gherkin
import (
"bufio"
"fmt"
"github.com/acst/gherkin/messages"
gio "github.com/gogo/protobuf/io"
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/proto"
"io"
"io/ioutil"
"math"
"strings"
)
func Messages(
paths []string,
sourceStream io.Reader,
language string,
includeSource bool,
includeGherkinDocument bool,
includePickles bool,
outStream io.Writer,
json bool,
) ([]messages.Envelope, error) {
var result []messages.Envelope
var err error
handleMessage := func(result []messages.Envelope, message *messages.Envelope) ([]messages.Envelope, error) {
if outStream != nil {
if json {
ma := jsonpb.Marshaler{}
msgJson, err := ma.MarshalToString(message)
if err != nil {
return result, err
}
out := bufio.NewWriter(outStream)
out.WriteString(msgJson)
out.WriteString("\n")
} else {
bytes, err := proto.Marshal(message)
if err != nil {
return result, err
}
outStream.Write(proto.EncodeVarint(uint64(len(bytes))))
outStream.Write(bytes)
}
} else {
result = append(result, *message)
}
return result, err
}
processSource := func(source *messages.Source) error {
if includeSource {
result, err = handleMessage(result, &messages.Envelope{
Message: &messages.Envelope_Source{
Source: source,
},
})
}
doc, err := ParseGherkinDocumentForLanguage(strings.NewReader(source.Data), language)
if errs, ok := err.(parseErrors); ok {
// expected parse errors
for _, err := range errs {
if pe, ok := err.(*parseError); ok {
result, err = handleMessage(result, pe.asAttachment(source.Uri))
} else {
return fmt.Errorf("parse feature file: %s, unexpected error: %+v\n", source.Uri, err)
}
}
return nil
}
if includeGherkinDocument {
doc.Uri = source.Uri
result, err = handleMessage(result, &messages.Envelope{
Message: &messages.Envelope_GherkinDocument{
GherkinDocument: doc,
},
})
}
if includePickles {
for _, pickle := range Pickles(*doc, source.Uri, source.Data) {
result, err = handleMessage(result, &messages.Envelope{
Message: &messages.Envelope_Pickle{
Pickle: pickle,
},
})
}
}
return nil
}
if len(paths) == 0 {
reader := gio.NewDelimitedReader(sourceStream, math.MaxInt32)
for {
wrapper := &messages.Envelope{}
err := reader.ReadMsg(wrapper)
if err == io.EOF {
break
}
switch t := wrapper.Message.(type) {
case *messages.Envelope_Source:
processSource(t.Source)
}
}
} else {
for _, path := range paths {
in, err := ioutil.ReadFile(path)
if err != nil {
return result, fmt.Errorf("read feature file: %s - %+v", path, err)
}
source := &messages.Source{
Uri: path,
Data: string(in),
Media: &messages.Media{
Encoding: messages.Media_UTF8,
ContentType: "text/x.cucumber.gherkin+plain",
},
}
processSource(source)
}
}
return result, err
}
func (a *parseError) asAttachment(uri string) *messages.Envelope {
return &messages.Envelope{
Message: &messages.Envelope_Attachment{
Attachment: &messages.Attachment{
Data: a.Error(),
Source: &messages.SourceReference{
Uri: uri,
Location: &messages.Location{
Line: uint32(a.loc.Line),
Column: uint32(a.loc.Column),
},
},
}},
}
}