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

diff --git a/docs/content/extras/highlighting.md b/docs/content/extras/highlighting.md
index 788759d03130858f00e9b47d724ed4f19fca2400..1efa9a0dcddfb4015ffbbfbb10954560cb14ee1e 100644 (file)
--- a/docs/content/extras/highlighting.md
+++ b/docs/content/extras/highlighting.md
@@ -106,6 +106,7 @@ It is also possible to add syntax highlighting with GitHub flavoured code fences
 ### 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

diff --git a/helpers/pygments.go b/helpers/pygments.go
index 637f61b190fb56a76342372f205d1c7ee31b5983..38266b26756b61dfb881d7ec7711b9e64cde2e16 100644 (file)
--- a/helpers/pygments.go
+++ b/helpers/pygments.go
@@ -62,10 +62,11 @@ func Highlight(code, lang, optsStr string) string {
 
        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 @@ func Highlight(code, lang, optsStr string) string {
                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())