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// Copyright 2020 CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package runtime
import (
"strings"
"cuelang.org/go/cue/ast"
"cuelang.org/go/cue/ast/astutil"
"cuelang.org/go/cue/build"
"cuelang.org/go/cue/errors"
"cuelang.org/go/cue/stats"
"cuelang.org/go/cue/token"
"cuelang.org/go/internal/core/adt"
"cuelang.org/go/internal/core/compile"
)
type Config struct {
Runtime *Runtime
Filename string
ImportPath string
Counts *stats.Counts
compile.Config
}
// Build builds b and all its transitive dependencies, insofar they have not
// been build yet.
func (x *Runtime) Build(cfg *Config, b *build.Instance) (v *adt.Vertex, errs errors.Error) {
if err := b.Complete(); err != nil {
return nil, b.Err
}
if v := x.getNodeFromInstance(b); v != nil {
return v, b.Err
}
// TODO: clear cache of old implementation.
// if s := b.ImportPath; s != "" {
// // Use cached result, if available.
// if v, err := x.LoadImport(s); v != nil || err != nil {
// return v, err
// }
// }
errs = b.Err
// Build transitive dependencies.
for _, file := range b.Files {
file.VisitImports(func(d *ast.ImportDecl) {
for _, s := range d.Specs {
errs = errors.Append(errs, x.buildSpec(cfg, b, s))
}
})
}
err := x.ResolveFiles(b)
errs = errors.Append(errs, err)
var cc *compile.Config
if cfg != nil {
cc = &cfg.Config
}
if cfg != nil && cfg.ImportPath != "" {
b.ImportPath = cfg.ImportPath
b.PkgName = astutil.ImportPathName(b.ImportPath)
}
v, err = compile.Files(cc, x, b.ID(), b.Files...)
errs = errors.Append(errs, err)
errs = errors.Append(errs, x.InjectImplementations(b, v))
if errs != nil {
v = adt.ToVertex(&adt.Bottom{Err: errs})
b.Err = errs
}
x.AddInst(b.ImportPath, v, b)
return v, errs
}
func dummyLoad(token.Pos, string) *build.Instance { return nil }
func (r *Runtime) Compile(cfg *Config, source interface{}) (*adt.Vertex, *build.Instance) {
ctx := build.NewContext()
var filename string
if cfg != nil && cfg.Filename != "" {
filename = cfg.Filename
}
p := ctx.NewInstance(filename, dummyLoad)
if err := p.AddFile(filename, source); err != nil {
return nil, p
}
v, _ := r.Build(cfg, p)
return v, p
}
func (r *Runtime) CompileFile(cfg *Config, file *ast.File) (*adt.Vertex, *build.Instance) {
ctx := build.NewContext()
filename := file.Filename
if cfg != nil && cfg.Filename != "" {
filename = cfg.Filename
}
p := ctx.NewInstance(filename, dummyLoad)
err := p.AddSyntax(file)
if err != nil {
return nil, p
}
p.PkgName = file.PackageName()
v, _ := r.Build(cfg, p)
return v, p
}
func (x *Runtime) buildSpec(cfg *Config, b *build.Instance, spec *ast.ImportSpec) (errs errors.Error) {
info, err := astutil.ParseImportSpec(spec)
if err != nil {
return errors.Promote(err, "invalid import path")
}
pkg := b.LookupImport(info.ID)
if pkg == nil {
if strings.Contains(info.ID, ".") {
return errors.Newf(spec.Pos(),
"package %q imported but not defined in %s",
info.ID, b.ImportPath)
} else if x.index.builtinPaths[info.ID] == nil {
return errors.Newf(spec.Pos(),
"builtin package %q undefined", info.ID)
}
return nil
}
if v := x.getNodeFromInstance(pkg); v != nil {
return pkg.Err
}
if _, err := x.Build(cfg, pkg); err != nil {
return err
}
return nil
}
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