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Improve SHA1 link detection (#6526)
This improves the SHA1 link detection to not pick up extraneous non-whitespace characters at the end of the URL. The '.' is a special case handled in code itself because of missing regexp lookahead support. Regex test cases: https://regex101.com/r/xUMlqh/3
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@ -54,7 +54,7 @@ var (
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shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
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// anySHA1Pattern allows to split url containing SHA into parts
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anySHA1Pattern = regexp.MustCompile(`https?://(?:\S+/){4}([0-9a-f]{40})/?([^#\s]+)?(?:#(\S+))?`)
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anySHA1Pattern = regexp.MustCompile(`https?://(?:\S+/){4}([0-9a-f]{40})(/[^#\s]+)?(#\S+)?`)
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validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
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@ -594,31 +594,46 @@ func fullSha1PatternProcessor(ctx *postProcessCtx, node *html.Node) {
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if m == nil {
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return
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}
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// take out what's relevant
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urlFull := node.Data[m[0]:m[1]]
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hash := node.Data[m[2]:m[3]]
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text := base.ShortSha(node.Data[m[2]:m[3]])
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var subtree, line string
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// optional, we do them depending on the length.
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if m[7] > 0 {
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line = node.Data[m[6]:m[7]]
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}
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// 3rd capture group matches a optional path
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subpath := ""
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if m[5] > 0 {
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subtree = node.Data[m[4]:m[5]]
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subpath = node.Data[m[4]:m[5]]
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}
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text := base.ShortSha(hash)
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if subtree != "" {
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text += "/" + subtree
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}
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if line != "" {
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text += " ("
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text += line
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text += ")"
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// 4th capture group matches a optional url hash
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hash := ""
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if m[7] > 0 {
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hash = node.Data[m[6]:m[7]][1:]
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}
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replaceContent(node, m[0], m[1], createLink(urlFull, text))
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start := m[0]
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end := m[1]
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// If url ends in '.', it's very likely that it is not part of the
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// actual url but used to finish a sentence.
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if strings.HasSuffix(urlFull, ".") {
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end--
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urlFull = urlFull[:len(urlFull)-1]
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if hash != "" {
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hash = hash[:len(hash)-1]
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} else if subpath != "" {
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subpath = subpath[:len(subpath)-1]
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}
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}
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if subpath != "" {
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text += subpath
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}
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if hash != "" {
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text += " (" + hash + ")"
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}
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replaceContent(node, start, end, createLink(urlFull, text))
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}
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// sha1CurrentPatternProcessor renders SHA1 strings to corresponding links that
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@ -273,12 +273,12 @@ func TestRegExp_anySHA1Pattern(t *testing.T) {
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testCases := map[string][]string{
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"https://github.com/jquery/jquery/blob/a644101ed04d0beacea864ce805e0c4f86ba1cd1/test/unit/event.js#L2703": {
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"a644101ed04d0beacea864ce805e0c4f86ba1cd1",
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"test/unit/event.js",
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"L2703",
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"/test/unit/event.js",
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"#L2703",
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},
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"https://github.com/jquery/jquery/blob/a644101ed04d0beacea864ce805e0c4f86ba1cd1/test/unit/event.js": {
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"a644101ed04d0beacea864ce805e0c4f86ba1cd1",
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"test/unit/event.js",
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"/test/unit/event.js",
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"",
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},
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"https://github.com/jquery/jquery/commit/0705be475092aede1eddae01319ec931fb9c65fc": {
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@ -288,13 +288,13 @@ func TestRegExp_anySHA1Pattern(t *testing.T) {
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},
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"https://github.com/jquery/jquery/tree/0705be475092aede1eddae01319ec931fb9c65fc/src": {
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"0705be475092aede1eddae01319ec931fb9c65fc",
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"src",
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"/src",
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"",
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},
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"https://try.gogs.io/gogs/gogs/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2": {
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"d8a994ef243349f321568f9e36d5c3f444b99cae",
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"",
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"diff-2",
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"#diff-2",
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},
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}
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