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// Copyright 2018 The 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 load
// Files in this package are to a large extent based on Go files from the following
// Go packages:
// - cmd/go/internal/load
// - go/build
import (
"path/filepath"
"cuelang.org/go/cue/build"
"cuelang.org/go/cue/errors"
"cuelang.org/go/cue/parser"
"cuelang.org/go/cue/token"
"cuelang.org/go/internal/mod/modpkgload"
)
type loader struct {
cfg *Config
tagger *tagger
stk importStack
pkgs *modpkgload.Packages
modFileCache *modFileCache
// dirCachedBuildFiles caches the work involved when reading a
// directory. It is keyed by directory name. When we descend into
// subdirectories to load patterns such as ./... we often end up
// loading parent directories many times over; this cache
// amortizes that work.
dirCachedBuildFiles map[string]cachedDirFiles
}
type cachedDirFiles struct {
err errors.Error
filenames []string
}
func newLoader(c *Config, tg *tagger, pkgs *modpkgload.Packages) *loader {
return &loader{
cfg: c,
tagger: tg,
pkgs: pkgs,
modFileCache: newModFileCache(),
dirCachedBuildFiles: make(map[string]cachedDirFiles),
}
}
func (l *loader) abs(filename string) string {
if !isLocalImport(filename) {
return filename
}
return filepath.Join(l.cfg.Dir, filename)
}
func (l *loader) errPkgf(importPos []token.Pos, format string, args ...interface{}) *PackageError {
err := &PackageError{
ImportStack: l.stk.Copy(),
Message: errors.NewMessagef(format, args...),
}
err.fillPos(l.cfg.Dir, importPos)
return err
}
// cueFilesPackage creates a package for building a collection of CUE files
// (typically named on the command line).
func (l *loader) cueFilesPackage(files []*build.File) *build.Instance {
// ModInit() // TODO: support modules
pkg := l.cfg.Context.NewInstance(l.cfg.Dir, nil)
fp := newFileProcessor(l.cfg, pkg, l.tagger)
if l.cfg.Package == "*" {
fp.allPackages = true
pkg.PkgName = "_"
}
for _, bf := range files {
fp.add(l.cfg.Dir, bf, allowAnonymous|allowExcludedFiles)
}
// TODO: ModImportFromFiles(files)
pkg.Dir = l.cfg.Dir
rewriteFiles(pkg, pkg.Dir, true)
for _, err := range errors.Errors(fp.finalize(pkg)) { // ImportDir(&ctxt, dir, 0)
var x *NoFilesError
if len(pkg.OrphanedFiles) == 0 || !errors.As(err, &x) {
pkg.ReportError(err)
}
}
// TODO: Support module importing.
// if ModDirImportPath != nil {
// // Use the effective import path of the directory
// // for deciding visibility during pkg.load.
// bp.ImportPath = ModDirImportPath(dir)
// }
pkg.User = true
l.addFiles(pkg)
_ = pkg.Complete()
pkg.DisplayPath = "command-line-arguments"
return pkg
}
// addFiles populates p.Files by reading CUE syntax from p.BuildFiles.
func (l *loader) addFiles(p *build.Instance) {
for _, bf := range p.BuildFiles {
cfg := l.cfg.parserConfig
if p.ModuleFile != nil {
cfg = cfg.Apply(parser.Version(p.ModuleFile.Language.Version))
}
f, err := l.cfg.fileSystem.getCUESyntax(bf, cfg)
if err != nil {
p.ReportError(errors.Promote(err, "load"))
}
_ = p.AddSyntax(f)
}
}
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