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// Copyright 2020 The Hugo Authors. All rights reserved.
//
// 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 js
import (
"errors"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"github.com/gohugoio/hugo/hugofs"
"github.com/spf13/afero"
"github.com/gohugoio/hugo/common/herrors"
"github.com/gohugoio/hugo/hugolib/filesystems"
"github.com/gohugoio/hugo/media"
"github.com/gohugoio/hugo/resources/internal"
"github.com/evanw/esbuild/pkg/api"
"github.com/gohugoio/hugo/resources"
"github.com/gohugoio/hugo/resources/resource"
)
// Client context for ESBuild.
type Client struct {
rs *resources.Spec
sfs *filesystems.SourceFilesystem
}
// New creates a new client context.
func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) *Client {
return &Client{
rs: rs,
sfs: fs,
}
}
type buildTransformation struct {
optsm map[string]interface{}
c *Client
}
func (t *buildTransformation) Key() internal.ResourceTransformationKey {
return internal.NewResourceTransformationKey("jsbuild", t.optsm)
}
func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx) error {
ctx.OutMediaType = media.JavascriptType
opts, err := decodeOptions(t.optsm)
if err != nil {
return err
}
if opts.TargetPath != "" {
ctx.OutPath = opts.TargetPath
} else {
ctx.ReplaceOutPathExtension(".js")
}
src, err := ioutil.ReadAll(ctx.From)
if err != nil {
return err
}
sdir, _ := path.Split(ctx.SourcePath)
opts.sourcefile = ctx.SourcePath
opts.resolveDir = t.c.sfs.RealFilename(sdir)
opts.workDir = t.c.rs.WorkingDir
opts.contents = string(src)
opts.mediaType = ctx.InMediaType
buildOptions, err := toBuildOptions(opts)
if err != nil {
return err
}
buildOptions.Plugins, err = createBuildPlugins(t.c, opts)
if err != nil {
return err
}
result := api.Build(buildOptions)
if len(result.Errors) > 0 {
first := result.Errors[0]
loc := first.Location
path := loc.File
var err error
var f afero.File
var filename string
if !strings.HasPrefix(path, "..") {
// Try first in the assets fs
var fi os.FileInfo
fi, err = t.c.rs.BaseFs.Assets.Fs.Stat(path)
if err == nil {
m := fi.(hugofs.FileMetaInfo).Meta()
filename = m.Filename()
f, err = m.Open()
}
}
if f == nil {
path = filepath.Join(t.c.rs.WorkingDir, path)
filename = path
f, err = t.c.rs.Fs.Os.Open(path)
}
if err == nil {
fe := herrors.NewFileError("js", 0, loc.Line, loc.Column, errors.New(first.Text))
err, _ := herrors.WithFileContext(fe, filename, f, herrors.SimpleLineMatcher)
f.Close()
return err
}
return fmt.Errorf("%s", result.Errors[0].Text)
}
ctx.To.Write(result.OutputFiles[0].Contents)
return nil
}
// Process process esbuild transform
func (c *Client) Process(res resources.ResourceTransformer, opts map[string]interface{}) (resource.Resource, error) {
return res.Transform(
&buildTransformation{c: c, optsm: opts},
)
}
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