/
info.go
140 lines (112 loc) · 2.82 KB
/
info.go
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// Copyright (C) 2019 rameshvk. All rights reserved.
// Use of this source code is governed by a MIT-style license
// that can be found in the LICENSE file.
package dotc
import (
"bytes"
"go/format"
"text/template"
"golang.org/x/tools/imports"
)
// Info tracks all information used for code generation
type Info struct {
Package string
Imports [][2]string
Structs []Struct
Unions []Union
Slices []Slice
StructStreams []Struct
UnionStreams []Union
SliceStreams []Slice
}
// Generate implements the helper methods for the provided types
func (info Info) Generate() (result string, err error) {
var buf bytes.Buffer
defer func() {
if r := recover(); r != nil {
err = r.(error)
}
}()
info.Imports = append(
[][2]string{
{"", "github.com/dotchain/dot/changes"},
{"", "github.com/dotchain/dot/changes/types"},
{"", "github.com/dotchain/dot/streams"},
}, info.Imports...)
must(infoTpl.Execute(&buf, info))
for _, s := range info.Structs {
must(s.GenerateApply(&buf))
must(s.GenerateSetters(&buf))
}
for _, s := range info.StructStreams {
must(StructStream(s).GenerateStream(&buf))
}
for _, u := range info.Unions {
must(u.GenerateApply(&buf))
must(u.GenerateSetters(&buf))
}
for _, u := range info.UnionStreams {
must(UnionStream(u).GenerateStream(&buf))
}
for _, s := range info.Slices {
must(s.GenerateApply(&buf))
must(s.GenerateSetters(&buf))
}
for _, s := range info.SliceStreams {
must(SliceStream(s).GenerateStream(&buf))
}
result = buf.String()
p, err := format.Source([]byte(result))
must(err)
result = string(p)
p, err = imports.Process("generated.go", p, nil)
must(err)
return string(p), nil
}
// GenerateTests generates the tests
func (info Info) GenerateTests() (result string, err error) {
var buf bytes.Buffer
defer func() {
if r := recover(); r != nil {
err = r.(error)
}
}()
info.Imports = append(
[][2]string{
{"", "github.com/dotchain/dot/changes"},
{"", "github.com/dotchain/dot/changes/types"},
{"", "github.com/dotchain/dot/streams"},
{"", "reflect"},
{"", "testing"},
}, info.Imports...)
must(infoTpl.Execute(&buf, info))
for _, s := range info.Structs {
must(StructStream(s).GenerateStreamTests(&buf))
}
for _, u := range info.Unions {
must(UnionStream(u).GenerateStreamTests(&buf))
}
for _, s := range info.Slices {
must(SliceStream(s).GenerateStreamTests(&buf))
}
result = buf.String()
p, err := format.Source([]byte(result))
must(err)
result = string(p)
p, err = imports.Process("generated_test.go", p, nil)
must(err)
return string(p), nil
}
var infoTpl = template.Must(template.New("imports").Parse(`
// Generated. DO NOT EDIT.
package {{.Package}}
import (
{{range .Imports}}{{index . 0}} "{{index . 1}}"
{{end -}}
)
`))
func must(err error) {
if err != nil {
panic(err)
}
}