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compiler.go
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compiler.go
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package compiler
import (
"github.com/eddieowens/ranvier/commons"
"github.com/eddieowens/ranvier/commons/validator"
"github.com/eddieowens/ranvier/lang/domain"
"github.com/eddieowens/ranvier/lang/semantics"
"github.com/eddieowens/ranvier/lang/services"
json "github.com/json-iterator/go"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
)
const Key = "Compiler"
type CompileAllOptions struct {
CompileOptions
Force bool
}
type CompileOptions struct {
ParseOptions
// The directory that the file will be output to. If the directory does not exist, it will be created.
OutputDirectory string `validate:"required_without=DryRun"`
DryRun bool
Type string `validate:"omitempty,oneof=json toml yaml yml"`
}
type ParseOptions struct {
// The root directory of the file to parse which determines the name of the file. The file that is being
// parsed must lie within this directory.
Root string `validate:"required,file"`
}
type Compiler interface {
Compile(filepath string, options CompileOptions) (*domain.CompiledSchema, error)
CompileAll(path string, options CompileAllOptions) (SchemaPack, error)
ValidateSemantics(manifest *domain.ParsedSchema) error
Parse(fp string, options ParseOptions) (*domain.ParsedSchema, error)
Load(root, fp string) (*domain.Schema, error)
}
type compilerImpl struct {
JsonMerger commons.JsonMerger `inject:"JsonMerger"`
Analyzer semantics.Analyzer `inject:"Analyzer"`
FileCollector services.FileCollector `inject:"FileCollector"`
FileService services.FileService `inject:"FileService"`
Packer SchemaPacker `inject:"SchemaPacker"`
ValidatorService validator.Validator `inject:"Validator"`
}
func (c *compilerImpl) Load(root, fp string) (*domain.Schema, error) {
p := path.Join(root, fp)
d, err := ioutil.ReadFile(p)
if err != nil {
return nil, err
}
schma := new(domain.Schema)
err = json.Unmarshal(d, schma)
if err != nil {
return nil, err
}
schma.Name = ToSchemaName(fp)
return schma, nil
}
func (c *compilerImpl) CompileAll(path string, options CompileAllOptions) (SchemaPack, error) {
options.CompileOptions.ParseOptions.Root = path
if err := c.ValidatorService.Struct(options); err != nil {
return nil, err
}
files := c.FileCollector.Collect(path)
files = c.FileService.SubtractPaths(path, files)
pErr := NewSchemaPackError()
pack := NewSchemaPack(path)
for _, f := range files {
s, err := c.Compile(f, options.CompileOptions)
if err != nil {
pErr.AddError(err)
if !options.Force {
return nil, pErr
}
}
err = c.Packer.AddSchema(pack, s)
if err != nil {
pErr.AddError(err)
if !options.Force {
return nil, pErr
}
}
}
if len(pErr.Errors()) > 0 {
return pack, pErr
} else {
return pack, nil
}
}
func (c *compilerImpl) ValidateSemantics(manifest *domain.ParsedSchema) error {
return c.Analyzer.Semantics(manifest)
}
func (c *compilerImpl) Parse(fp string, options ParseOptions) (*domain.ParsedSchema, error) {
if err := c.ValidatorService.Struct(options); err != nil {
return nil, err
}
schma, err := c.Load(options.Root, fp)
if err != nil {
return nil, err
}
var extendedConfig []byte
dependentSchemas := make([]domain.ParsedSchema, len(schma.Extends))
for i, v := range schma.Extends {
schma.Extends[i] = path.Join(options.Root, v)
depSchema, err := c.Parse(v, options)
if err != nil {
return depSchema, err
}
if extendedConfig == nil {
extendedConfig = depSchema.Config
} else {
extendedConfig, err = c.JsonMerger.MergeJson(depSchema.Config, extendedConfig)
if err != nil {
return nil, err
}
}
dependentSchemas[i] = *depSchema
}
if len(dependentSchemas) <= 0 {
dependentSchemas = nil
}
var config []byte
if extendedConfig == nil {
config = schma.Config
} else if schma.Config == nil {
config = extendedConfig
} else {
config, err = c.JsonMerger.MergeJson(extendedConfig, schma.Config)
if err != nil {
return nil, err
}
}
schma.Config = config
schma.Path = path.Join(options.Root, fp)
return &domain.ParsedSchema{
Schema: *schma,
Dependencies: dependentSchemas,
}, nil
}
func (c *compilerImpl) Compile(fp string, options CompileOptions) (*domain.CompiledSchema, error) {
if options.Type == "" {
options.Type = domain.Json
}
if err := c.ValidatorService.Struct(options); err != nil {
return nil, err
}
m, err := c.Parse(fp, options.ParseOptions)
if err != nil {
return nil, err
}
err = c.ValidateSemantics(m)
if err != nil {
return nil, err
}
compiledSchema := &domain.CompiledSchema{
ParsedSchema: *m,
}
if !options.DryRun {
err := c.FileService.ToFile(options.OutputDirectory, options.Type, compiledSchema)
if err != nil {
return nil, err
}
}
return compiledSchema, err
}
// Converts the Schema's filepath into its corresponding name.
func ToSchemaName(fp string) string {
fp = path.Join(string(os.PathSeparator), fp)
dirs := strings.Split(fp, string(os.PathSeparator))
dirs = dirs[1:]
if len(dirs) <= 0 {
return ""
}
lastInd := len(dirs) - 1
lastElem := dirs[lastInd]
dirs[lastInd] = strings.TrimSuffix(lastElem, filepath.Ext(lastElem))
return strings.Join(dirs, "-")
}