shithub: hugo

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helpers: Ignore cache for Pygments when flag set

When the --ignoreCache flag is set to true, do not write and read
the Pygments results to/from the cache directory.

Fixes #2066
Closes #2068

--- a/docs/content/extras/highlighting.md

+++ b/docs/content/extras/highlighting.md

@@ -106,6 +106,7 @@

 ### Disclaimers

  * Pygments is relatively slow and _causes a performance hit when building your site_, but Hugo has been designed to cache the results to disk.

+ * The caching can be turned off by setting the `--ignoreCache` flag to `true`.

  * Languages available depends on your Pygments installation.

 ## Client-side

--- a/helpers/pygments.go

+++ b/helpers/pygments.go

@@ -62,10 +62,11 @@

 	fs := hugofs.Os()

+	ignoreCache := viper.GetBool("IgnoreCache")

 	cacheDir := viper.GetString("CacheDir")

 	var cachefile string

-	if cacheDir != "" {

+	if !ignoreCache && cacheDir != "" {

 		cachefile = filepath.Join(cacheDir, fmt.Sprintf("pygments-%x", hash.Sum(nil)))

 		exists, err := Exists(cachefile, fs)

@@ -120,7 +121,7 @@

 		str = strings.Replace(str, "</pre>", "</code></pre>", 1)

 	}

-	if cachefile != "" {

+	if !ignoreCache && cachefile != "" {

 		// Write cache file

 		if err := WriteToDisk(cachefile, strings.NewReader(str), fs); err != nil {

 			jww.ERROR.Print(stderr.String())