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Prevent panic in Org mode HighlightCodeBlock (#17140)

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When rendering source in org mode there is a mistake in the highlight code that
causes a panic.

This PR fixes this.

Fix #17139

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath
2021-09-24 14:29:32 +01:00
committed by GitHub
parent 5842a55b31
commit 623d2dd411
3 changed files with 46 additions and 12 deletions
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23
modules/highlight/highlight.go
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@ -66,17 +66,6 @@ func Code(fileName, code string) string {
if len(code) > sizeLimit {
return code
}
formatter := html.New(html.WithClasses(true),
html.WithLineNumbers(false),
html.PreventSurroundingPre(true),
)
if formatter == nil {
log.Error("Couldn't create chroma formatter")
return code
}
htmlbuf := bytes.Buffer{}
htmlw := bufio.NewWriter(&htmlbuf)
var lexer chroma.Lexer
if val, ok := highlightMapping[filepath.Ext(fileName)]; ok {
@ -97,6 +86,18 @@ func Code(fileName, code string) string {
}
cache.Add(fileName, lexer)
}
return CodeFromLexer(lexer, code)
}
// CodeFromLexer returns a HTML version of code string with chroma syntax highlighting classes
func CodeFromLexer(lexer chroma.Lexer, code string) string {
formatter := html.New(html.WithClasses(true),
html.WithLineNumbers(false),
html.PreventSurroundingPre(true),
)
htmlbuf := bytes.Buffer{}
htmlw := bufio.NewWriter(&htmlbuf)
iterator, err := lexer.Tokenise(nil, string(code))
if err != nil {