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Prevent resource publishing for transformed inline resources

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That is, if only `.Content` is accessed.

This means that, for a transformed resource to be published to `/public`, you need to access either `.RelPermalink` or `Permalink`.

Fixes #4944
This commit is contained in:
Bjørn Erik Pedersen 2018-12-21 10:05:57 +01:00
parent 1021714449
commit 43f9df0194
2 changed files with 91 additions and 20 deletions
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28
hugolib/resource_chain_test.go
View file

@ -168,6 +168,8 @@ T1: {{ $r.Content }}
func TestResourceChain(t *testing.T) {
t.Parallel()
assert := require.New(t)
tests := []struct {
name string
shouldRun func() bool
@ -199,7 +201,7 @@ T6: {{ $bundle1.Permalink }}
b.AssertFileContent("public/index.html", `T5 RelPermalink: /sass/styles3.css|`)
b.AssertFileContent("public/index.html", `T6: http://example.com/styles/bundle1.css`)
b.AssertFileContent("public/styles/templ.min.css", `.home{color:blue}`)
assert.False(b.CheckExists("public/styles/templ.min.css"))
b.AssertFileContent("public/styles/bundle1.css", `.home{color:blue}body{color:#333}`)
}},
@ -313,6 +315,30 @@ T1: {{ $r1.Permalink }}|{{ $r1.RelPermalink }}
}},
// https://github.com/gohugoio/hugo/issues/4944
{"Prevent resource publish on .Content only", func() bool { return true }, func(b *sitesBuilder) {
b.WithTemplates("home.html", `
{{ $cssInline := "body { color: green; }" | resources.FromString "inline.css" | minify }}
{{ $cssPublish1 := "body { color: blue; }" | resources.FromString "external1.css" | minify }}
{{ $cssPublish2 := "body { color: orange; }" | resources.FromString "external2.css" | minify }}
Inline: {{ $cssInline.Content }}
Publish 1: {{ $cssPublish1.Content }} {{ $cssPublish1.RelPermalink }}
Publish 2: {{ $cssPublish2.Permalink }}
`)
}, func(b *sitesBuilder) {
b.AssertFileContent("public/index.html",
`Inline: body{color:green}`,
"Publish 1: body{color:blue} /external1.min.css",
"Publish 2: http://example.com/external2.min.css",
)
assert.True(b.CheckExists("public/external2.min.css"), "Referenced content should be copied to /public")
assert.True(b.CheckExists("public/external1.min.css"), "Referenced content should be copied to /public")
assert.False(b.CheckExists("public/inline.min.css"), "Inline content should not be copied to /public")
}},
{"template", func() bool { return true }, func(b *sitesBuilder) {}, func(b *sitesBuilder) {
}},
}

75
resource/transform.go
View file

@ -183,6 +183,11 @@ type transformedResource struct {
transformInit sync.Once
transformErr error
// We delay publishing until either .RelPermalink or .Permalink
// is invoked.
publishInit sync.Once
published bool
// The transformed values
content string
contentInit sync.Once
@ -220,7 +225,7 @@ func (r *transformedResource) tryTransformedFileCache(key string) io.ReadCloser
}
func (r *transformedResource) Content() (interface{}, error) {
if err := r.initTransform(true); err != nil {
if err := r.initTransform(true, false); err != nil {
return nil, err
}
if err := r.initContent(); err != nil {
@ -230,14 +235,14 @@ func (r *transformedResource) Content() (interface{}, error) {
}
func (r *transformedResource) Data() interface{} {
if err := r.initTransform(false); err != nil {
if err := r.initTransform(false, false); err != nil {
return noData
}
return r.MetaData
}
func (r *transformedResource) MediaType() media.Type {
if err := r.initTransform(false); err != nil {
if err := r.initTransform(false, false); err != nil {
return media.Type{}
}
m, _ := r.cache.rs.MediaTypes.GetByType(r.MediaTypeV)
@ -245,14 +250,14 @@ func (r *transformedResource) MediaType() media.Type {
}
func (r *transformedResource) Permalink() string {
if err := r.initTransform(false); err != nil {
if err := r.initTransform(false, true); err != nil {
return ""
}
return r.linker.permalinkFor(r.Target)
}
func (r *transformedResource) RelPermalink() string {
if err := r.initTransform(false); err != nil {
if err := r.initTransform(false, true); err != nil {
return ""
}
return r.linker.relPermalinkFor(r.Target)
@ -271,11 +276,11 @@ func (r *transformedResource) initContent() error {
return err
}
func (r *transformedResource) transform(setContent bool) (err error) {
openPublishFileForWriting := func(relTargetPath string) (io.WriteCloser, error) {
func (r *transformedResource) openPublishFileForWriting(relTargetPath string) (io.WriteCloser, error) {
return helpers.OpenFilesForWriting(r.cache.rs.PublishFs, r.linker.relTargetPathsFor(relTargetPath)...)
}
}
func (r *transformedResource) transform(setContent, publish bool) (err error) {
// This can be the last resource in a chain.
// Rewind and create a processing chain.
@ -345,7 +350,7 @@ func (r *transformedResource) transform(setContent bool) (err error) {
tctx := &ResourceTransformationCtx{
Data: r.transformedResourceMetadata.MetaData,
OpenResourcePublisher: openPublishFileForWriting,
OpenResourcePublisher: r.openPublishFileForWriting,
}
tctx.InMediaType = first.MediaType()
@ -426,14 +431,18 @@ func (r *transformedResource) transform(setContent bool) (err error) {
r.MediaTypeV = tctx.OutMediaType.Type()
}
publicw, err := openPublishFileForWriting(r.Target)
var publishwriters []io.WriteCloser
if publish {
publicw, err := r.openPublishFileForWriting(r.Target)
if err != nil {
r.transformErr = err
return
return err
}
defer publicw.Close()
publishwriters := []io.WriteCloser{publicw}
publishwriters = append(publishwriters, publicw)
}
if transformedContentr == nil {
// Also write it to the cache
@ -474,13 +483,49 @@ func (r *transformedResource) transform(setContent bool) (err error) {
return nil
}
func (r *transformedResource) initTransform(setContent bool) error {
func (r *transformedResource) initTransform(setContent, publish bool) error {
r.transformInit.Do(func() {
if err := r.transform(setContent); err != nil {
r.published = publish
if err := r.transform(setContent, publish); err != nil {
r.transformErr = err
r.cache.rs.Logger.ERROR.Println("error: failed to transform resource:", err)
}
})
if !publish {
return r.transformErr
}
r.publishInit.Do(func() {
if r.published {
return
}
r.published = true
// Copy the file from cache to /public
_, src, err := r.cache.fileCache.Get(r.sourceFilename)
if err == nil {
defer src.Close()
var dst io.WriteCloser
dst, err = r.openPublishFileForWriting(r.Target)
if err == nil {
defer dst.Close()
io.Copy(dst, src)
}
}
if err != nil {
r.transformErr = err
r.cache.rs.Logger.ERROR.Println("error: failed to publish resource:", err)
return
}
})
return r.transformErr
}