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Add CSV support to transform.Unmarshal

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Fixes #5555
This commit is contained in:
Bjørn Erik Pedersen 2018-12-23 10:40:32 +01:00
parent 822dc627a1
commit a574469797
No known key found for this signature in database
GPG key ID: 330E6E2BD4859D8F
16 changed files with 238 additions and 44 deletions
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2
commands/convert.go
View file

@ -238,7 +238,7 @@ func parseContentFile(r io.Reader) (parsedFile, error) {
iter.PeekWalk(walkFn)
metadata, err := metadecoders.UnmarshalToMap(pf.frontMatterSource, pf.frontMatterFormat)
metadata, err := metadecoders.Default.UnmarshalToMap(pf.frontMatterSource, pf.frontMatterFormat)
if err != nil {
return pf, err
}

2
commands/hugo.go
View file

@ -1045,7 +1045,7 @@ func (c *commandeer) isThemeVsHugoVersionMismatch(fs afero.Fs) (dir string, mism
b, err := afero.ReadFile(fs, path)
tomlMeta, err := metadecoders.UnmarshalToMap(b, metadecoders.TOML)
tomlMeta, err := metadecoders.Default.UnmarshalToMap(b, metadecoders.TOML)
if err != nil {
continue

2
commands/import_jekyll.go
View file

@ -257,7 +257,7 @@ func (i *importCmd) loadJekyllConfig(fs afero.Fs, jekyllRoot string) map[string]
return nil
}
c, err := metadecoders.UnmarshalToMap(b, metadecoders.YAML)
c, err := metadecoders.Default.UnmarshalToMap(b, metadecoders.YAML)
if err != nil {
return nil

4
config/configLoader.go
View file

@ -57,7 +57,7 @@ func FromFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error)
}
func readConfig(format metadecoders.Format, data []byte) (map[string]interface{}, error) {
m, err := metadecoders.UnmarshalToMap(data, format)
m, err := metadecoders.Default.UnmarshalToMap(data, format)
if err != nil {
return nil, err
}
@ -69,7 +69,7 @@ func readConfig(format metadecoders.Format, data []byte) (map[string]interface{}
}
func loadConfigFromFile(fs afero.Fs, filename string) (map[string]interface{}, error) {
m, err := metadecoders.UnmarshalFileToMap(fs, filename)
m, err := metadecoders.Default.UnmarshalFileToMap(fs, filename)
if err != nil {
return nil, err
}

1
go.sum
View file

@ -72,7 +72,6 @@ github.com/magefile/mage v1.4.0 h1:RI7B1CgnPAuu2O9lWszwya61RLmfL0KCdo+QyyI/Bhk=
github.com/magefile/mage v1.4.0/go.mod h1:IUDi13rsHje59lecXokTfGX0QIzO45uVPlXnJYsXepA=
github.com/magiconair/properties v1.8.0 h1:LLgXmsheXeRoUOBOjtwPQCWIYqM/LU1ayDtDePerRcY=
github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
github.com/markbates/inflect v0.0.0-20171215194931-a12c3aec81a6 h1:LZhVjIISSbj8qLf2qDPP0D8z0uvOWAW5C85ly5mJW6c=
github.com/markbates/inflect v0.0.0-20171215194931-a12c3aec81a6/go.mod h1:oTeZL2KHA7CUX6X+fovmK9OvIOFuqu0TwdQrZjLTh88=
github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2/go.mod h1:0KeJpeMD6o+O4hW7qJOT7vyQPKrWmj26uf5wMc/IiIs=
github.com/mattn/go-isatty v0.0.4 h1:bnP0vzxcAdeI1zdubAl5PjU6zsERjGZb7raWodagDYs=

2
hugolib/config.go
View file

@ -285,7 +285,7 @@ func (l configLoader) loadConfigFromConfigDir(v *viper.Viper) ([]string, error)
name := helpers.Filename(filepath.Base(path))
item, err := metadecoders.UnmarshalFileToMap(sourceFs, path)
item, err := metadecoders.Default.UnmarshalFileToMap(sourceFs, path)
if err != nil {
return l.wrapFileError(err, path)
}

2
hugolib/page_content.go
View file

@ -91,7 +91,7 @@ Loop:
result.Write(it.Val)
case it.IsFrontMatter():
f := metadecoders.FormatFromFrontMatterType(it.Type)
m, err := metadecoders.UnmarshalToMap(it.Val, f)
m, err := metadecoders.Default.UnmarshalToMap(it.Val, f)
if err != nil {
if fe, ok := err.(herrors.FileError); ok {
return herrors.ToFileErrorWithOffset(fe, iter.LineNumber()-1)

10
hugolib/resource_chain_test.go
View file

@ -342,11 +342,19 @@ Publish 2: {{ $cssPublish2.Permalink }}
{"unmarshal", func() bool { return true }, func(b *sitesBuilder) {
b.WithTemplates("home.html", `
{{ $toml := "slogan = \"Hugo Rocks!\"" | resources.FromString "slogan.toml" | transform.Unmarshal }}
{{ $csv1 := "\"Hugo Rocks\",\"Hugo is Fast!\"" | resources.FromString "slogans.csv" | transform.Unmarshal }}
{{ $csv2 := "a;b;c" | resources.FromString "abc.csv" | transform.Unmarshal (dict "csvComma" ";") }}
Slogan: {{ $toml.slogan }}
CSV1: {{ $csv1 }} {{ len (index $csv1 0) }}
CSV2: {{ $csv2 }}
`)
}, func(b *sitesBuilder) {
b.AssertFileContent("public/index.html", `Slogan: Hugo Rocks!`)
b.AssertFileContent("public/index.html",
`Slogan: Hugo Rocks!`,
`[[Hugo Rocks Hugo is Fast!]] 2`,
)
}},
{"template", func() bool { return true }, func(b *sitesBuilder) {}, func(b *sitesBuilder) {

2
hugolib/site.go
View file

@ -1014,7 +1014,7 @@ func (s *Site) readData(f source.ReadableFile) (interface{}, error) {
content := helpers.ReaderToBytes(file)
format := metadecoders.FormatFromString(f.Extension())
return metadecoders.Unmarshal(content, format)
return metadecoders.Default.Unmarshal(content, format)
}
func (s *Site) readDataFromSourceFS() error {

64
parser/metadecoders/decoder.go
View file

@ -14,6 +14,8 @@
package metadecoders
import (
"bytes"
"encoding/csv"
"encoding/json"
"fmt"
@ -27,22 +29,37 @@ import (
yaml "gopkg.in/yaml.v2"
)
// Decoder provides some configuration options for the decoders.
type Decoder struct {
// Comma is the field delimiter used in the CSV decoder. It defaults to ','.
Comma rune
// Comment, if not 0, is the comment character ued in the CSV decoder. Lines beginning with the
// Comment character without preceding whitespace are ignored.
Comment rune
}
// Default is a Decoder in its default configuration.
var Default = Decoder{
Comma: ',',
}
// UnmarshalToMap will unmarshall data in format f into a new map. This is
// what's needed for Hugo's front matter decoding.
func UnmarshalToMap(data []byte, f Format) (map[string]interface{}, error) {
func (d Decoder) UnmarshalToMap(data []byte, f Format) (map[string]interface{}, error) {
m := make(map[string]interface{})
if data == nil {
return m, nil
}
err := unmarshal(data, f, &m)
err := d.unmarshal(data, f, &m)
return m, err
}
// UnmarshalFileToMap is the same as UnmarshalToMap, but reads the data from
// the given filename.
func UnmarshalFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error) {
func (d Decoder) UnmarshalFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error) {
format := FormatFromString(filename)
if format == "" {
return nil, errors.Errorf("%q is not a valid configuration format", filename)
@ -52,23 +69,29 @@ func UnmarshalFileToMap(fs afero.Fs, filename string) (map[string]interface{}, e
if err != nil {
return nil, err
}
return UnmarshalToMap(data, format)
return d.UnmarshalToMap(data, format)
}
// Unmarshal will unmarshall data in format f into an interface{}.
// This is what's needed for Hugo's /data handling.
func Unmarshal(data []byte, f Format) (interface{}, error) {
func (d Decoder) Unmarshal(data []byte, f Format) (interface{}, error) {
if data == nil {
return make(map[string]interface{}), nil
switch f {
case CSV:
return make([][]string, 0), nil
default:
return make(map[string]interface{}), nil
}
}
var v interface{}
err := unmarshal(data, f, &v)
err := d.unmarshal(data, f, &v)
return v, err
}
// unmarshal unmarshals data in format f into v.
func unmarshal(data []byte, f Format, v interface{}) error {
func (d Decoder) unmarshal(data []byte, f Format, v interface{}) error {
var err error
@ -116,6 +139,9 @@ func unmarshal(data []byte, f Format, v interface{}) error {
*v.(*interface{}) = mm
}
}
case CSV:
return d.unmarshalCSV(data, v)
default:
return errors.Errorf("unmarshal of format %q is not supported", f)
}
@ -128,6 +154,28 @@ func unmarshal(data []byte, f Format, v interface{}) error {
}
func (d Decoder) unmarshalCSV(data []byte, v interface{}) error {
r := csv.NewReader(bytes.NewReader(data))
r.Comma = d.Comma
r.Comment = d.Comment
records, err := r.ReadAll()
if err != nil {
return err
}
switch v.(type) {
case *interface{}:
*v.(*interface{}) = records
default:
return errors.Errorf("CSV cannot be unmarshaled into %T", v)
}
return nil
}
func toFileError(f Format, err error) error {
return herrors.ToFileError(string(f), err)
}

10
parser/metadecoders/decoder_test.go
View file

@ -26,6 +26,8 @@ func TestUnmarshalToMap(t *testing.T) {
expect := map[string]interface{}{"a": "b"}
d := Default
for i, test := range []struct {
data string
format Format
@ -40,9 +42,10 @@ func TestUnmarshalToMap(t *testing.T) {
{`#+a: b`, ORG, expect},
// errors
{`a = b`, TOML, false},
{`a,b,c`, CSV, false}, // Use Unmarshal for CSV
} {
msg := fmt.Sprintf("%d: %s", i, test.format)
m, err := UnmarshalToMap([]byte(test.data), test.format)
m, err := d.UnmarshalToMap([]byte(test.data), test.format)
if b, ok := test.expect.(bool); ok && !b {
assert.Error(err, msg)
} else {
@ -57,6 +60,8 @@ func TestUnmarshalToInterface(t *testing.T) {
expect := map[string]interface{}{"a": "b"}
d := Default
for i, test := range []struct {
data string
format Format
@ -67,12 +72,13 @@ func TestUnmarshalToInterface(t *testing.T) {
{`#+a: b`, ORG, expect},
{`a = "b"`, TOML, expect},
{`a: "b"`, YAML, expect},
{`a,b,c`, CSV, [][]string{[]string{"a", "b", "c"}}},
{"a: Easy!\nb:\n c: 2\n d: [3, 4]", YAML, map[string]interface{}{"a": "Easy!", "b": map[string]interface{}{"c": 2, "d": []interface{}{3, 4}}}},
// errors
{`a = "`, TOML, false},
} {
msg := fmt.Sprintf("%d: %s", i, test.format)
m, err := Unmarshal([]byte(test.data), test.format)
m, err := d.Unmarshal([]byte(test.data), test.format)
if b, ok := test.expect.(bool); ok && !b {
assert.Error(err, msg)
} else {

10
parser/metadecoders/format.go
View file

@ -31,6 +31,7 @@ const (
JSON Format = "json"
TOML Format = "toml"
YAML Format = "yaml"
CSV Format = "csv"
)
// FormatFromString turns formatStr, typically a file extension without any ".",
@ -51,6 +52,8 @@ func FormatFromString(formatStr string) Format {
return TOML
case "org":
return ORG
case "csv":
return CSV
}
return ""
@ -88,11 +91,16 @@ func FormatFromFrontMatterType(typ pageparser.ItemType) Format {
// FormatFromContentString tries to detect the format (JSON, YAML or TOML)
// in the given string.
// It return an empty string if no format could be detected.
func FormatFromContentString(data string) Format {
func (d Decoder) FormatFromContentString(data string) Format {
csvIdx := strings.IndexRune(data, d.Comma)
jsonIdx := strings.Index(data, "{")
yamlIdx := strings.Index(data, ":")
tomlIdx := strings.Index(data, "=")
if isLowerIndexThan(csvIdx, jsonIdx, yamlIdx, tomlIdx) {
return CSV
}
if isLowerIndexThan(jsonIdx, yamlIdx, tomlIdx) {
return JSON
}

3
parser/metadecoders/format_test.go
View file

@ -88,12 +88,13 @@ func TestFormatFromContentString(t *testing.T) {
{`foo: "bar"`, YAML},
{`foo:"bar"`, YAML},
{`{ "foo": "bar"`, JSON},
{`a,b,c"`, CSV},
{`asdfasdf`, Format("")},
{``, Format("")},
} {
errMsg := fmt.Sprintf("[%d] %s", i, test.data)
result := FormatFromContentString(test.data)
result := Default.FormatFromContentString(test.data)
assert.Equal(test.expect, result, errMsg)
}

4
tpl/transform/remarshal.go
View file

@ -35,12 +35,12 @@ func (ns *Namespace) Remarshal(format string, data interface{}) (string, error)
return "", err
}
fromFormat := metadecoders.FormatFromContentString(from)
fromFormat := metadecoders.Default.FormatFromContentString(from)
if fromFormat == "" {
return "", errors.New("failed to detect format from content")
}
meta, err := metadecoders.UnmarshalToMap([]byte(from), fromFormat)
meta, err := metadecoders.Default.UnmarshalToMap([]byte(from), fromFormat)
var result bytes.Buffer
if err := parser.InterfaceToConfig(meta, mark, &result); err != nil {

93
tpl/transform/unmarshal.go
View file

@ -15,8 +15,10 @@ package transform
import (
"io/ioutil"
"strings"
"github.com/gohugoio/hugo/common/hugio"
"github.com/mitchellh/mapstructure"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/parser/metadecoders"
@ -27,8 +29,33 @@ import (
)
// Unmarshal unmarshals the data given, which can be either a string
// or a Resource. Supported formats are JSON, TOML and YAML.
func (ns *Namespace) Unmarshal(data interface{}) (interface{}, error) {
// or a Resource. Supported formats are JSON, TOML, YAML, and CSV.
// You can optional provide an Options object as the first argument.
func (ns *Namespace) Unmarshal(args ...interface{}) (interface{}, error) {
if len(args) < 1 || len(args) > 2 {
return nil, errors.New("unmarshal takes 1 or 2 arguments")
}
var data interface{}
var decoder = metadecoders.Default
if len(args) == 1 {
data = args[0]
} else {
m, ok := args[0].(map[string]interface{})
if !ok {
return nil, errors.New("first argument must be a map")
}
var err error
data = args[1]
decoder, err = decodeDecoder(m)
if err != nil {
return nil, errors.WithMessage(err, "failed to decode options")
}
}
// All the relevant Resource types implements ReadSeekCloserResource,
// which should be the most effective way to get the content.
@ -75,7 +102,7 @@ func (ns *Namespace) Unmarshal(data interface{}) (interface{}, error) {
return nil, err
}
return metadecoders.Unmarshal(b, f)
return decoder.Unmarshal(b, f)
})
}
@ -88,11 +115,67 @@ func (ns *Namespace) Unmarshal(data interface{}) (interface{}, error) {
key := helpers.MD5String(dataStr)
return ns.cache.GetOrCreate(key, func() (interface{}, error) {
f := metadecoders.FormatFromContentString(dataStr)
f := decoder.FormatFromContentString(dataStr)
if f == "" {
return nil, errors.New("unknown format")
}
return metadecoders.Unmarshal([]byte(dataStr), f)
return decoder.Unmarshal([]byte(dataStr), f)
})
}
func decodeDecoder(m map[string]interface{}) (metadecoders.Decoder, error) {
opts := metadecoders.Default
if m == nil {
return opts, nil
}
// mapstructure does not support string to rune conversion, so do that manually.
// See https://github.com/mitchellh/mapstructure/issues/151
for k, v := range m {
if strings.EqualFold(k, "Comma") {
r, err := stringToRune(v)
if err != nil {
return opts, err
}
opts.Comma = r
delete(m, k)
} else if strings.EqualFold(k, "Comment") {
r, err := stringToRune(v)
if err != nil {
return opts, err
}
opts.Comment = r
delete(m, k)
}
}
err := mapstructure.WeakDecode(m, &opts)
return opts, err
}
func stringToRune(v interface{}) (rune, error) {
s, err := cast.ToStringE(v)
if err != nil {
return 0, err
}
if len(s) == 0 {
return 0, nil
}
var r rune
for i, rr := range s {
if i == 0 {
r = rr
} else {
return 0, errors.Errorf("invalid character: %q", v)
}
}
return r, nil
}

71
tpl/transform/unmarshal_test.go
View file

@ -89,38 +89,74 @@ func TestUnmarshal(t *testing.T) {
}
for i, test := range []struct {
data interface{}
expect interface{}
data interface{}
options interface{}
expect interface{}
}{
{`{ "slogan": "Hugo Rocks!" }`, func(m map[string]interface{}) {
{`{ "slogan": "Hugo Rocks!" }`, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{`slogan: "Hugo Rocks!"`, func(m map[string]interface{}) {
{`slogan: "Hugo Rocks!"`, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{`slogan = "Hugo Rocks!"`, func(m map[string]interface{}) {
{`slogan = "Hugo Rocks!"`, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{testContentResource{content: `slogan: "Hugo Rocks!"`, mime: media.YAMLType}, func(m map[string]interface{}) {
{testContentResource{content: `slogan: "Hugo Rocks!"`, mime: media.YAMLType}, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{testContentResource{content: `{ "slogan": "Hugo Rocks!" }`, mime: media.JSONType}, func(m map[string]interface{}) {
{testContentResource{content: `{ "slogan": "Hugo Rocks!" }`, mime: media.JSONType}, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{testContentResource{content: `slogan = "Hugo Rocks!"`, mime: media.TOMLType}, func(m map[string]interface{}) {
{testContentResource{content: `slogan = "Hugo Rocks!"`, mime: media.TOMLType}, nil, func(m map[string]interface{}) {
assertSlogan(m)
}},
{testContentResource{content: `1997,Ford,E350,"ac, abs, moon",3000.00
1999,Chevy,"Venture ""Extended Edition""","",4900.00`, mime: media.CSVType}, nil, func(r [][]string) {
assert.Equal(2, len(r))
first := r[0]
assert.Equal(5, len(first))
assert.Equal("Ford", first[1])
}},
{testContentResource{content: `a;b;c`, mime: media.CSVType}, map[string]interface{}{"comma": ";"}, func(r [][]string) {
assert.Equal(r, [][]string{[]string{"a", "b", "c"}})
}},
{"a,b,c", nil, func(r [][]string) {
assert.Equal(r, [][]string{[]string{"a", "b", "c"}})
}},
{"a;b;c", map[string]interface{}{"comma": ";"}, func(r [][]string) {
assert.Equal(r, [][]string{[]string{"a", "b", "c"}})
}},
{testContentResource{content: `
% This is a comment
a;b;c`, mime: media.CSVType}, map[string]interface{}{"CommA": ";", "Comment": "%"}, func(r [][]string) {
assert.Equal(r, [][]string{[]string{"a", "b", "c"}})
}},
// errors
{"thisisnotavaliddataformat", false},
{testContentResource{content: `invalid&toml"`, mime: media.TOMLType}, false},
{testContentResource{content: `unsupported: MIME"`, mime: media.CalendarType}, false},
{"thisisnotavaliddataformat", false},
{`{ notjson }`, false},
{tstNoStringer{}, false},
{"thisisnotavaliddataformat", nil, false},
{testContentResource{content: `invalid&toml"`, mime: media.TOMLType}, nil, false},
{testContentResource{content: `unsupported: MIME"`, mime: media.CalendarType}, nil, false},
{"thisisnotavaliddataformat", nil, false},
{`{ notjson }`, nil, false},
{tstNoStringer{}, nil, false},
} {
errMsg := fmt.Sprintf("[%d]", i)
result, err := ns.Unmarshal(test.data)
ns.cache.Clear()
var args []interface{}
if test.options != nil {
args = []interface{}{test.options, test.data}
} else {
args = []interface{}{test.data}
}
result, err := ns.Unmarshal(args...)
if b, ok := test.expect.(bool); ok && !b {
assert.Error(err, errMsg)
@ -129,6 +165,11 @@ func TestUnmarshal(t *testing.T) {
m, ok := result.(map[string]interface{})
assert.True(ok, errMsg)
fn(m)
} else if fn, ok := test.expect.(func(r [][]string)); ok {
assert.NoError(err, errMsg)
r, ok := result.([][]string)
assert.True(ok, errMsg)
fn(r)
} else {
assert.NoError(err, errMsg)
assert.Equal(test.expect, result, errMsg)