cuelang.org/go@v0.13.0/internal/core/runtime/build.go (about)

     1  // Copyright 2020 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package runtime
    16  
    17  import (
    18  	"strings"
    19  
    20  	"cuelang.org/go/cue/ast"
    21  	"cuelang.org/go/cue/ast/astutil"
    22  	"cuelang.org/go/cue/build"
    23  	"cuelang.org/go/cue/errors"
    24  	"cuelang.org/go/cue/stats"
    25  	"cuelang.org/go/internal/core/adt"
    26  	"cuelang.org/go/internal/core/compile"
    27  )
    28  
    29  type Config struct {
    30  	Runtime    *Runtime
    31  	Filename   string
    32  	ImportPath string
    33  
    34  	Counts *stats.Counts
    35  
    36  	compile.Config
    37  }
    38  
    39  // Build builds b and all its transitive dependencies, insofar they have not
    40  // been build yet.
    41  func (x *Runtime) Build(cfg *Config, b *build.Instance) (v *adt.Vertex, errs errors.Error) {
    42  	if err := b.Complete(); err != nil {
    43  		return nil, b.Err
    44  	}
    45  	if v := x.getNodeFromInstance(b); v != nil {
    46  		return v, b.Err
    47  	}
    48  	// TODO: clear cache of old implementation.
    49  	// if s := b.ImportPath; s != "" {
    50  	// 	// Use cached result, if available.
    51  	// 	if v, err := x.LoadImport(s); v != nil || err != nil {
    52  	// 		return v, err
    53  	// 	}
    54  	// }
    55  
    56  	errs = b.Err
    57  
    58  	// Build transitive dependencies.
    59  	for _, file := range b.Files {
    60  		file.VisitImports(func(d *ast.ImportDecl) {
    61  			for _, s := range d.Specs {
    62  				errs = errors.Append(errs, x.buildSpec(cfg, b, s))
    63  			}
    64  		})
    65  	}
    66  
    67  	err := x.ResolveFiles(b)
    68  	errs = errors.Append(errs, err)
    69  
    70  	var cc *compile.Config
    71  	if cfg != nil {
    72  		cc = &cfg.Config
    73  	}
    74  	if cfg != nil && cfg.ImportPath != "" {
    75  		b.ImportPath = cfg.ImportPath
    76  		b.PkgName = astutil.ImportPathName(b.ImportPath)
    77  	}
    78  	v, err = compile.Files(cc, x, b.ID(), b.Files...)
    79  	errs = errors.Append(errs, err)
    80  
    81  	errs = errors.Append(errs, x.InjectImplementations(b, v))
    82  
    83  	if errs != nil {
    84  		v = adt.ToVertex(&adt.Bottom{Err: errs})
    85  		b.Err = errs
    86  	}
    87  
    88  	x.AddInst(b.ImportPath, v, b)
    89  
    90  	return v, errs
    91  }
    92  
    93  func (r *Runtime) Compile(cfg *Config, source interface{}) (*adt.Vertex, *build.Instance) {
    94  	ctx := build.NewContext()
    95  	var filename string
    96  	if cfg != nil && cfg.Filename != "" {
    97  		filename = cfg.Filename
    98  	}
    99  	p := ctx.NewInstance(filename, nil)
   100  	if err := p.AddFile(filename, source); err != nil {
   101  		return nil, p
   102  	}
   103  	v, _ := r.Build(cfg, p)
   104  	return v, p
   105  }
   106  
   107  func (r *Runtime) CompileFile(cfg *Config, file *ast.File) (*adt.Vertex, *build.Instance) {
   108  	ctx := build.NewContext()
   109  	filename := file.Filename
   110  	if cfg != nil && cfg.Filename != "" {
   111  		filename = cfg.Filename
   112  	}
   113  	p := ctx.NewInstance(filename, nil)
   114  	err := p.AddSyntax(file)
   115  	if err != nil {
   116  		return nil, p
   117  	}
   118  	p.PkgName = file.PackageName()
   119  	v, _ := r.Build(cfg, p)
   120  	return v, p
   121  }
   122  
   123  func (x *Runtime) buildSpec(cfg *Config, b *build.Instance, spec *ast.ImportSpec) (errs errors.Error) {
   124  	info, err := astutil.ParseImportSpec(spec)
   125  	if err != nil {
   126  		return errors.Promote(err, "invalid import path")
   127  	}
   128  
   129  	pkg := b.LookupImport(info.ID)
   130  	if pkg == nil {
   131  		if strings.Contains(info.ID, ".") {
   132  			return errors.Newf(spec.Pos(),
   133  				"package %q imported but not defined in %s",
   134  				info.ID, b.ImportPath)
   135  		} else if x.index.builtinPaths[info.ID] == nil {
   136  			return errors.Newf(spec.Pos(),
   137  				"builtin package %q undefined", info.ID)
   138  		}
   139  		return nil
   140  	}
   141  
   142  	if v := x.getNodeFromInstance(pkg); v != nil {
   143  		return pkg.Err
   144  	}
   145  
   146  	if _, err := x.Build(cfg, pkg); err != nil {
   147  		return err
   148  	}
   149  
   150  	return nil
   151  }