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Fix panic bug in handling multiple references in commit (#13486)

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* Fix panic bug in handling multiple references in commit

The issue lay in determining the position of matches on a second run round
a commit message in FindAllIssueReferences.

Fix #13483

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Extract function and make testable

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Fix the comment

Signed-off-by: Andrew Thornton <art27@cantab.net>

* cleaning up the comments a bit more

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2020-11-09 22:57:47 +00:00 committed by GitHub
parent ffa712e783
commit 77e5081a2e
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2 changed files with 95 additions and 29 deletions
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96
modules/references/references.go
View file

@ -235,40 +235,78 @@ func findAllIssueReferencesMarkdown(content string) []*rawReference {
return findAllIssueReferencesBytes(bcontent, links)
}
func convertFullHTMLReferencesToShortRefs(re *regexp.Regexp, contentBytes *[]byte) {
// We will iterate through the content, rewrite and simplify full references.
//
// We want to transform something like:
//
// this is a https://ourgitea.com/git/owner/repo/issues/123456789, foo
// https://ourgitea.com/git/owner/repo/pulls/123456789
//
// Into something like:
//
// this is a #123456789, foo
// !123456789
pos := 0
for {
// re looks for something like: (\s|^|\(|\[)https://ourgitea.com/git/(owner/repo)/(issues)/(123456789)(?:\s|$|\)|\]|[:;,.?!]\s|[:;,.?!]$)
match := re.FindSubmatchIndex((*contentBytes)[pos:])
if match == nil {
break
}
// match is a bunch of indices into the content from pos onwards so
// to simplify things let's just add pos to all of the indices in match
for i := range match {
match[i] += pos
}
// match[0]-match[1] is whole string
// match[2]-match[3] is preamble
// move the position to the end of the preamble
pos = match[3]
// match[4]-match[5] is owner/repo
// now copy the owner/repo to end of the preamble
endPos := pos + match[5] - match[4]
copy((*contentBytes)[pos:endPos], (*contentBytes)[match[4]:match[5]])
// move the current position to the end of the newly copied owner/repo
pos = endPos
// Now set the issue/pull marker:
//
// match[6]-match[7] == 'issues'
(*contentBytes)[pos] = '#'
if string((*contentBytes)[match[6]:match[7]]) == "pulls" {
(*contentBytes)[pos] = '!'
}
pos++
// Then add the issue/pull number
//
// match[8]-match[9] is the number
endPos = pos + match[9] - match[8]
copy((*contentBytes)[pos:endPos], (*contentBytes)[match[8]:match[9]])
// Now copy what's left at the end of the string to the new end position
copy((*contentBytes)[endPos:], (*contentBytes)[match[9]:])
// now we reset the length
// our new section has length endPos - match[3]
// our old section has length match[9] - match[3]
(*contentBytes) = (*contentBytes)[:len((*contentBytes))-match[9]+endPos]
pos = endPos
}
}
// FindAllIssueReferences returns a list of unvalidated references found in a string.
func FindAllIssueReferences(content string) []IssueReference {
// Need to convert fully qualified html references to local system to #/! short codes
contentBytes := []byte(content)
if re := getGiteaIssuePullPattern(); re != nil {
pos := 0
for {
match := re.FindSubmatchIndex(contentBytes[pos:])
if match == nil {
break
}
// match[0]-match[1] is whole string
// match[2]-match[3] is preamble
pos += match[3]
// match[4]-match[5] is owner/repo
endPos := pos + match[5] - match[4]
copy(contentBytes[pos:endPos], contentBytes[match[4]:match[5]])
pos = endPos
// match[6]-match[7] == 'issues'
contentBytes[pos] = '#'
if string(contentBytes[match[6]:match[7]]) == "pulls" {
contentBytes[pos] = '!'
}
pos++
// match[8]-match[9] is the number
endPos = pos + match[9] - match[8]
copy(contentBytes[pos:endPos], contentBytes[match[8]:match[9]])
copy(contentBytes[endPos:], contentBytes[match[9]:])
// now we reset the length
// our new section has length endPos - match[3]
// our old section has length match[9] - match[3]
contentBytes = contentBytes[:len(contentBytes)-match[9]+endPos]
pos = endPos
}
convertFullHTMLReferencesToShortRefs(re, &contentBytes)
} else {
log.Debug("No GiteaIssuePullPattern pattern")
}

28
modules/references/references_test.go
View file

@ -5,6 +5,7 @@
package references
import (
"regexp"
"testing"
"code.gitea.io/gitea/modules/setting"
@ -29,6 +30,26 @@ type testResult struct {
TimeLog string
}
func TestConvertFullHTMLReferencesToShortRefs(t *testing.T) {
re := regexp.MustCompile(`(\s|^|\(|\[)` +
regexp.QuoteMeta("https://ourgitea.com/git/") +
`([0-9a-zA-Z-_\.]+/[0-9a-zA-Z-_\.]+)/` +
`((?:issues)|(?:pulls))/([0-9]+)(?:\s|$|\)|\]|[:;,.?!]\s|[:;,.?!]$)`)
test := `this is a https://ourgitea.com/git/owner/repo/issues/123456789, foo
https://ourgitea.com/git/owner/repo/pulls/123456789
And https://ourgitea.com/git/owner/repo/pulls/123
`
expect := `this is a owner/repo#123456789, foo
owner/repo!123456789
And owner/repo!123
`
contentBytes := []byte(test)
convertFullHTMLReferencesToShortRefs(re, &contentBytes)
result := string(contentBytes)
assert.EqualValues(t, expect, result)
}
func TestFindAllIssueReferences(t *testing.T) {
fixtures := []testFixture{
@ -106,6 +127,13 @@ func TestFindAllIssueReferences(t *testing.T) {
{202, "user4", "repo5", "202", true, XRefActionNone, nil, nil, ""},
},
},
{
"This http://gitea.com:3000/user4/repo5/pulls/202 yes. http://gitea.com:3000/user4/repo5/pulls/203 no",
[]testResult{
{202, "user4", "repo5", "202", true, XRefActionNone, nil, nil, ""},
{203, "user4", "repo5", "203", true, XRefActionNone, nil, nil, ""},
},
},
{
"This http://GiTeA.COM:3000/user4/repo6/pulls/205 yes.",
[]testResult{