aboutsummaryrefslogtreecommitdiffhomepage
path: root/commands/convert.go
blob: c81ec792abced8b5deceb49b6cfc9359d9f4750e (plain)
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
// Copyright 2024 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 commands

import (
	"bytes"
	"context"
	"fmt"
	"path/filepath"
	"strings"
	"time"

	"github.com/bep/simplecobra"
	"github.com/gohugoio/hugo/config"
	"github.com/gohugoio/hugo/helpers"
	"github.com/gohugoio/hugo/hugofs"
	"github.com/gohugoio/hugo/hugolib"
	"github.com/gohugoio/hugo/parser"
	"github.com/gohugoio/hugo/parser/metadecoders"
	"github.com/gohugoio/hugo/parser/pageparser"
	"github.com/gohugoio/hugo/resources/page"
	"github.com/spf13/cobra"
)

func newConvertCommand() *convertCommand {
	var c *convertCommand
	c = &convertCommand{
		commands: []simplecobra.Commander{
			&simpleCommand{
				name:  "toJSON",
				short: "Convert front matter to JSON",
				long: `toJSON converts all front matter in the content directory
to use JSON for the front matter.`,
				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
					return c.convertContents(metadecoders.JSON)
				},
				withc: func(cmd *cobra.Command, r *rootCommand) {
				},
			},
			&simpleCommand{
				name:  "toTOML",
				short: "Convert front matter to TOML",
				long: `toTOML converts all front matter in the content directory
to use TOML for the front matter.`,
				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
					return c.convertContents(metadecoders.TOML)
				},
				withc: func(cmd *cobra.Command, r *rootCommand) {
				},
			},
			&simpleCommand{
				name:  "toYAML",
				short: "Convert front matter to YAML",
				long: `toYAML converts all front matter in the content directory
to use YAML for the front matter.`,
				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
					return c.convertContents(metadecoders.YAML)
				},
				withc: func(cmd *cobra.Command, r *rootCommand) {
				},
			},
		},
	}
	return c
}

type convertCommand struct {
	// Flags.
	outputDir string
	unsafe    bool

	// Deps.
	r *rootCommand
	h *hugolib.HugoSites

	// Commands.
	commands []simplecobra.Commander
}

func (c *convertCommand) Commands() []simplecobra.Commander {
	return c.commands
}

func (c *convertCommand) Name() string {
	return "convert"
}

func (c *convertCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
	return nil
}

func (c *convertCommand) Init(cd *simplecobra.Commandeer) error {
	cmd := cd.CobraCommand
	cmd.Short = "Convert your content to different formats"
	cmd.Long = `Convert your content (e.g. front matter) to different formats.

See convert's subcommands toJSON, toTOML and toYAML for more information.`

	cmd.PersistentFlags().StringVarP(&c.outputDir, "output", "o", "", "filesystem path to write files to")
	cmd.PersistentFlags().BoolVar(&c.unsafe, "unsafe", false, "enable less safe operations, please backup first")

	cmd.RunE = nil
	return nil
}

func (c *convertCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
	c.r = cd.Root.Command.(*rootCommand)
	cfg := config.New()
	cfg.Set("buildDrafts", true)
	h, err := c.r.Hugo(flagsToCfg(cd, cfg))
	if err != nil {
		return err
	}
	c.h = h
	return nil
}

func (c *convertCommand) convertAndSavePage(p page.Page, site *hugolib.Site, targetFormat metadecoders.Format) error {
	// The resources are not in .Site.AllPages.
	for _, r := range p.Resources().ByType("page") {
		if err := c.convertAndSavePage(r.(page.Page), site, targetFormat); err != nil {
			return err
		}
	}

	if p.File() == nil {
		// No content file.
		return nil
	}

	errMsg := fmt.Errorf("error processing file %q", p.File().Path())

	site.Log.Infoln("attempting to convert", p.File().Filename())

	f := p.File()
	file, err := f.FileInfo().Meta().Open()
	if err != nil {
		site.Log.Errorln(errMsg)
		file.Close()
		return nil
	}

	pf, err := pageparser.ParseFrontMatterAndContent(file)
	if err != nil {
		site.Log.Errorln(errMsg)
		file.Close()
		return err
	}

	file.Close()

	// better handling of dates in formats that don't have support for them
	if pf.FrontMatterFormat == metadecoders.JSON || pf.FrontMatterFormat == metadecoders.YAML || pf.FrontMatterFormat == metadecoders.TOML {
		for k, v := range pf.FrontMatter {
			switch vv := v.(type) {
			case time.Time:
				pf.FrontMatter[k] = vv.Format(time.RFC3339)
			}
		}
	}

	var newContent bytes.Buffer
	err = parser.InterfaceToFrontMatter(pf.FrontMatter, targetFormat, &newContent)
	if err != nil {
		site.Log.Errorln(errMsg)
		return err
	}

	newContent.Write(pf.Content)

	newFilename := p.File().Filename()

	if c.outputDir != "" {
		contentDir := strings.TrimSuffix(newFilename, p.File().Path())
		contentDir = filepath.Base(contentDir)

		newFilename = filepath.Join(c.outputDir, contentDir, p.File().Path())
	}

	fs := hugofs.Os
	if err := helpers.WriteToDisk(newFilename, &newContent, fs); err != nil {
		return fmt.Errorf("failed to save file %q:: %w", newFilename, err)
	}

	return nil
}

func (c *convertCommand) convertContents(format metadecoders.Format) error {
	if c.outputDir == "" && !c.unsafe {
		return newUserError("Unsafe operation not allowed, use --unsafe or set a different output path")
	}

	if err := c.h.Build(hugolib.BuildCfg{SkipRender: true}); err != nil {
		return err
	}

	site := c.h.Sites[0]

	var pagesBackedByFile page.Pages
	for _, p := range site.AllPages() {
		if p.File() == nil {
			continue
		}
		pagesBackedByFile = append(pagesBackedByFile, p)
	}

	site.Log.Println("processing", len(pagesBackedByFile), "content files")
	for _, p := range site.AllPages() {
		if err := c.convertAndSavePage(p, site, format); err != nil {
			return err
		}
	}
	return nil
}