1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
// 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 (
"fmt"
"io/ioutil"
"path"
"strings"
"github.com/spf13/cast"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/hugolib/filesystems"
"github.com/gohugoio/hugo/media"
"github.com/gohugoio/hugo/resources/internal"
"github.com/mitchellh/mapstructure"
"github.com/evanw/esbuild/pkg/api"
"github.com/gohugoio/hugo/resources"
"github.com/gohugoio/hugo/resources/resource"
)
const defaultTarget = "esnext"
type Options struct {
// If not set, the source path will be used as the base target path.
// Note that the target path's extension may change if the target MIME type
// is different, e.g. when the source is TypeScript.
TargetPath string
// Whether to minify to output.
Minify bool
// The language target.
// One of: es2015, es2016, es2017, es2018, es2019, es2020 or esnext.
// Default is esnext.
Target string
// External dependencies, e.g. "react".
Externals []string `hash:"set"`
// User defined symbols.
Defines map[string]interface{}
// What to use instead of React.createElement.
JSXFactory string
// What to use instead of React.Fragment.
JSXFragment string
}
type internalOptions struct {
TargetPath string
Minify bool
Target string
JSXFactory string
JSXFragment string
Externals []string `hash:"set"`
Defines map[string]string
// These are currently not exposed in the public Options struct,
// but added here to make the options hash as stable as possible for
// whenever we do.
TSConfig string
}
func DecodeOptions(m map[string]interface{}) (opts Options, err error) {
if m == nil {
return
}
err = mapstructure.WeakDecode(m, &opts)
err = mapstructure.WeakDecode(m, &opts)
if opts.TargetPath != "" {
opts.TargetPath = helpers.ToSlashTrimLeading(opts.TargetPath)
}
opts.Target = strings.ToLower(opts.Target)
return
}
type Client struct {
rs *resources.Spec
sfs *filesystems.SourceFilesystem
}
func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) *Client {
return &Client{rs: rs, sfs: fs}
}
type buildTransformation struct {
options internalOptions
rs *resources.Spec
sfs *filesystems.SourceFilesystem
}
func (t *buildTransformation) Key() internal.ResourceTransformationKey {
return internal.NewResourceTransformationKey("jsbuild", t.options)
}
func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx) error {
ctx.OutMediaType = media.JavascriptType
if t.options.TargetPath != "" {
ctx.OutPath = t.options.TargetPath
} else {
ctx.ReplaceOutPathExtension(".js")
}
var target api.Target
switch t.options.Target {
case defaultTarget:
target = api.ESNext
case "es5":
target = api.ES5
case "es6", "es2015":
target = api.ES2015
case "es2016":
target = api.ES2016
case "es2017":
target = api.ES2017
case "es2018":
target = api.ES2018
case "es2019":
target = api.ES2019
case "es2020":
target = api.ES2020
default:
return fmt.Errorf("invalid target: %q", t.options.Target)
}
var loader api.Loader
switch ctx.InMediaType.SubType {
// TODO(bep) ESBuild support a set of other loaders, but I currently fail
// to see the relevance. That may change as we start using this.
case media.JavascriptType.SubType:
loader = api.LoaderJS
case media.TypeScriptType.SubType:
loader = api.LoaderTS
case media.TSXType.SubType:
loader = api.LoaderTSX
case media.JSXType.SubType:
loader = api.LoaderJSX
default:
return fmt.Errorf("unsupported Media Type: %q", ctx.InMediaType)
}
src, err := ioutil.ReadAll(ctx.From)
if err != nil {
return err
}
sdir, sfile := path.Split(ctx.SourcePath)
sdir = t.sfs.RealFilename(sdir)
buildOptions := api.BuildOptions{
Outfile: "",
Bundle: true,
Target: target,
MinifyWhitespace: t.options.Minify,
MinifyIdentifiers: t.options.Minify,
MinifySyntax: t.options.Minify,
Defines: t.options.Defines,
Externals: t.options.Externals,
JSXFactory: t.options.JSXFactory,
JSXFragment: t.options.JSXFragment,
Tsconfig: t.options.TSConfig,
Stdin: &api.StdinOptions{
Contents: string(src),
Sourcefile: sfile,
ResolveDir: sdir,
Loader: loader,
},
}
result := api.Build(buildOptions)
if len(result.Errors) > 0 {
return fmt.Errorf("%s", result.Errors[0].Text)
}
if len(result.OutputFiles) != 1 {
return fmt.Errorf("unexpected output count: %d", len(result.OutputFiles))
}
ctx.To.Write(result.OutputFiles[0].Contents)
return nil
}
func (c *Client) Process(res resources.ResourceTransformer, opts Options) (resource.Resource, error) {
return res.Transform(
&buildTransformation{rs: c.rs, sfs: c.sfs, options: toInternalOptions(opts)},
)
}
func toInternalOptions(opts Options) internalOptions {
target := opts.Target
if target == "" {
target = defaultTarget
}
var defines map[string]string
if opts.Defines != nil {
defines = cast.ToStringMapString(opts.Defines)
}
return internalOptions{
TargetPath: opts.TargetPath,
Minify: opts.Minify,
Target: target,
Externals: opts.Externals,
Defines: defines,
JSXFactory: opts.JSXFactory,
JSXFragment: opts.JSXFragment,
}
}
|