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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
import (
"fmt"
"path/filepath"
"strings"
"cuelang.org/go/cue/build"
"cuelang.org/go/cue/errors"
"cuelang.org/go/cue/token"
)
// A PackageError describes an error loading information about a package.
type PackageError struct {
ImportStack []string // shortest path from package named on command line to this one
Pos token.Pos // position of error
errors.Message // the error itself
IsImportCycle bool // the error is an import cycle
}
func (p *PackageError) Position() token.Pos { return p.Pos }
func (p *PackageError) InputPositions() []token.Pos { return nil }
func (p *PackageError) Path() []string { return p.ImportStack }
func (p *PackageError) fillPos(cwd string, positions []token.Pos) {
if len(positions) > 0 && !p.Pos.IsValid() {
p.Pos = positions[0]
}
}
// TODO(localize)
func (p *PackageError) Error() string {
// Import cycles deserve special treatment.
if p.IsImportCycle {
return fmt.Sprintf("%s\npackage %s\n", p.Message, strings.Join(p.ImportStack, "\n\timports "))
}
if p.Pos.IsValid() {
// Omit import stack. The full path to the file where the error
// is the most important thing.
return p.Pos.String() + ": " + p.Message.Error()
}
if len(p.ImportStack) == 0 {
return p.Message.Error()
}
return "package " + strings.Join(p.ImportStack, "\n\timports ") + ": " + p.Message.Error()
}
// NoFilesError is the error used by Import to describe a directory
// containing no usable source files. (It may still contain
// tool files, files hidden by build tags, and so on.)
type NoFilesError struct {
Package *build.Instance
ignored bool // whether any CUE files were ignored due to build tags
}
func (e *NoFilesError) Position() token.Pos { return token.NoPos }
func (e *NoFilesError) InputPositions() []token.Pos { return nil }
func (e *NoFilesError) Path() []string { return nil }
// TODO(localize)
func (e *NoFilesError) Msg() (string, []interface{}) {
// Count files beginning with _, which we will pretend don't exist at all.
dummy := 0
for _, f := range e.Package.IgnoredFiles {
if strings.HasPrefix(filepath.Base(f.Filename), "_") {
dummy++
}
}
// path := shortPath(e.Package.Root, e.Package.Dir)
path := e.Package.DisplayPath
if len(e.Package.IgnoredFiles) > dummy {
b := strings.Builder{}
var args []any
b.WriteString("build constraints exclude all CUE files in %s:")
args = append(args, token.Position{Filename: path})
// CUE files exist, but they were ignored due to build constraints.
for _, f := range e.Package.IgnoredFiles {
b.WriteString("\n %s")
args = append(args, token.Position{Filename: f.Filename})
if f.ExcludeReason != nil {
b.WriteString(": %v")
args = append(args, f.ExcludeReason)
}
}
return b.String(), args
}
// if len(e.Package.TestCUEFiles) > 0 {
// // Test CUE files exist, but we're not interested in them.
// // The double-negative is unfortunate but we want e.Package.Dir
// // to appear at the end of error message.
// return "no non-test CUE files in " + e.Package.Dir
// }
return "no CUE files in %s", []any{path}
}
func (e *NoFilesError) Error() string {
format, args := e.Msg()
return fmt.Sprintf(format, args...)
}
// MultiplePackageError describes an attempt to build a package composed of
// CUE files from different packages.
type MultiplePackageError struct {
Dir string // directory containing files
Packages []string // package names found
Files []string // corresponding files: Files[i] declares package Packages[i]
}
func (e *MultiplePackageError) Position() token.Pos { return token.NoPos }
func (e *MultiplePackageError) InputPositions() []token.Pos { return nil }
func (e *MultiplePackageError) Path() []string { return nil }
func (e *MultiplePackageError) Msg() (string, []interface{}) {
return "found packages %q (%s) and %q (%s) in %q", []interface{}{
e.Packages[0],
e.Files[0],
e.Packages[1],
e.Files[1],
// To make sure [cue/errors] prints this directory name as relative,
// use a [token.Position] even though it's really only meant for regular source files.
token.Position{Filename: e.Dir},
}
}
func (e *MultiplePackageError) Error() string {
// Error string limited to two entries for compatibility.
format, args := e.Msg()
return fmt.Sprintf(format, args...)
}
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