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resource: Add instruction to install PostCSS when missing

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Fixes #5111
This commit is contained in:
Anthony Fok
2018-08-24 23:06:23 -06:00
committed by Bjørn Erik Pedersen
parent 94d6d6780f
commit 08d14113b6
1 changed files with 5 additions and 1 deletions
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6
resource/transform.go
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@@ -391,7 +391,11 @@ func (r *transformedResource) transform(setContent bool) (err error) {
// If a prepared bundle for this transformation chain is available, use that. // If a prepared bundle for this transformation chain is available, use that.
f := r.tryTransformedFileCache(key) f := r.tryTransformedFileCache(key)
if f == nil { if f == nil {
return fmt.Errorf("%s: failed to transform %q (%s): %s", strings.ToUpper(tr.transformation.Key().name), tctx.InPath, tctx.InMediaType.Type(), err) errMsg := err.Error()
if tr.transformation.Key().name == "postcss" {
errMsg = "PostCSS not found; install with \"npm install postcss-cli\". See https://gohugo.io/hugo-pipes/postcss/"
}
return fmt.Errorf("%s: failed to transform %q (%s): %s", strings.ToUpper(tr.transformation.Key().name), tctx.InPath, tctx.InMediaType.Type(), errMsg)
} }
transformedContentr = f transformedContentr = f
defer f.Close() defer f.Close()