1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
|
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package references
import (
"net/url"
"regexp"
"strconv"
"strings"
"sync"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup/mdstripper"
"code.gitea.io/gitea/modules/setting"
)
var (
// validNamePattern performs only the most basic validation for user or repository names
// Repository name should contain only alphanumeric, dash ('-'), underscore ('_') and dot ('.') characters.
validNamePattern = regexp.MustCompile(`^[a-z0-9_.-]+$`)
// NOTE: All below regex matching do not perform any extra validation.
// Thus a link is produced even if the linked entity does not exist.
// While fast, this is also incorrect and lead to false positives.
// TODO: fix invalid linking issue
// mentionPattern matches all mentions in the form of "@user"
mentionPattern = regexp.MustCompile(`(?:\s|^|\(|\[)(@[0-9a-zA-Z-_\.]+)(?:\s|$|\)|\])`)
// issueNumericPattern matches string that references to a numeric issue, e.g. #1287
issueNumericPattern = regexp.MustCompile(`(?:\s|^|\(|\[)(#[0-9]+)(?:\s|$|\)|\]|:|\.(\s|$))`)
// issueAlphanumericPattern matches string that references to an alphanumeric issue, e.g. ABC-1234
issueAlphanumericPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([A-Z]{1,10}-[1-9][0-9]*)(?:\s|$|\)|\]|:|\.(\s|$))`)
// crossReferenceIssueNumericPattern matches string that references a numeric issue in a different repository
// e.g. gogits/gogs#12345
crossReferenceIssueNumericPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-zA-Z-_\.]+/[0-9a-zA-Z-_\.]+#[0-9]+)(?:\s|$|\)|\]|\.(\s|$))`)
issueCloseKeywordsPat, issueReopenKeywordsPat *regexp.Regexp
issueKeywordsOnce sync.Once
giteaHostInit sync.Once
giteaHost string
)
// XRefAction represents the kind of effect a cross reference has once is resolved
type XRefAction int64
const (
// XRefActionNone means the cross-reference is simply a comment
XRefActionNone XRefAction = iota // 0
// XRefActionCloses means the cross-reference should close an issue if it is resolved
XRefActionCloses // 1
// XRefActionReopens means the cross-reference should reopen an issue if it is resolved
XRefActionReopens // 2
// XRefActionNeutered means the cross-reference will no longer affect the source
XRefActionNeutered // 3
)
// IssueReference contains an unverified cross-reference to a local issue or pull request
type IssueReference struct {
Index int64
Owner string
Name string
Action XRefAction
}
// RenderizableReference contains an unverified cross-reference to with rendering information
type RenderizableReference struct {
Issue string
Owner string
Name string
RefLocation *RefSpan
Action XRefAction
ActionLocation *RefSpan
}
type rawReference struct {
index int64
owner string
name string
action XRefAction
issue string
refLocation *RefSpan
actionLocation *RefSpan
}
func rawToIssueReferenceList(reflist []*rawReference) []IssueReference {
refarr := make([]IssueReference, len(reflist))
for i, r := range reflist {
refarr[i] = IssueReference{
Index: r.index,
Owner: r.owner,
Name: r.name,
Action: r.action,
}
}
return refarr
}
// RefSpan is the position where the reference was found within the parsed text
type RefSpan struct {
Start int
End int
}
func makeKeywordsPat(words []string) *regexp.Regexp {
acceptedWords := parseKeywords(words)
if len(acceptedWords) == 0 {
// Never match
return nil
}
return regexp.MustCompile(`(?i)(?:\s|^|\(|\[)(` + strings.Join(acceptedWords, `|`) + `):? $`)
}
func parseKeywords(words []string) []string {
acceptedWords := make([]string, 0, 5)
wordPat := regexp.MustCompile(`^[\pL]+$`)
for _, word := range words {
word = strings.ToLower(strings.TrimSpace(word))
// Accept Unicode letter class runes (a-z, á, à, ä, )
if wordPat.MatchString(word) {
acceptedWords = append(acceptedWords, word)
} else {
log.Info("Invalid keyword: %s", word)
}
}
return acceptedWords
}
func newKeywords() {
issueKeywordsOnce.Do(func() {
// Delay initialization until after the settings module is initialized
doNewKeywords(setting.Repository.PullRequest.CloseKeywords, setting.Repository.PullRequest.ReopenKeywords)
})
}
func doNewKeywords(close []string, reopen []string) {
issueCloseKeywordsPat = makeKeywordsPat(close)
issueReopenKeywordsPat = makeKeywordsPat(reopen)
}
// getGiteaHostName returns a normalized string with the local host name, with no scheme or port information
func getGiteaHostName() string {
giteaHostInit.Do(func() {
if uapp, err := url.Parse(setting.AppURL); err == nil {
giteaHost = strings.ToLower(uapp.Host)
} else {
giteaHost = ""
}
})
return giteaHost
}
// FindAllMentionsMarkdown matches mention patterns in given content and
// returns a list of found unvalidated user names **not including** the @ prefix.
func FindAllMentionsMarkdown(content string) []string {
bcontent, _ := mdstripper.StripMarkdownBytes([]byte(content))
locations := FindAllMentionsBytes(bcontent)
mentions := make([]string, len(locations))
for i, val := range locations {
mentions[i] = string(bcontent[val.Start+1 : val.End])
}
return mentions
}
// FindAllMentionsBytes matches mention patterns in given content
// and returns a list of locations for the unvalidated user names, including the @ prefix.
func FindAllMentionsBytes(content []byte) []RefSpan {
mentions := mentionPattern.FindAllSubmatchIndex(content, -1)
ret := make([]RefSpan, len(mentions))
for i, val := range mentions {
ret[i] = RefSpan{Start: val[2], End: val[3]}
}
return ret
}
// FindFirstMentionBytes matches the first mention in then given content
// and returns the location of the unvalidated user name, including the @ prefix.
func FindFirstMentionBytes(content []byte) (bool, RefSpan) {
mention := mentionPattern.FindSubmatchIndex(content)
if mention == nil {
return false, RefSpan{}
}
return true, RefSpan{Start: mention[2], End: mention[3]}
}
// FindAllIssueReferencesMarkdown strips content from markdown markup
// and returns a list of unvalidated references found in it.
func FindAllIssueReferencesMarkdown(content string) []IssueReference {
return rawToIssueReferenceList(findAllIssueReferencesMarkdown(content))
}
func findAllIssueReferencesMarkdown(content string) []*rawReference {
bcontent, links := mdstripper.StripMarkdownBytes([]byte(content))
return findAllIssueReferencesBytes(bcontent, links)
}
// FindAllIssueReferences returns a list of unvalidated references found in a string.
func FindAllIssueReferences(content string) []IssueReference {
return rawToIssueReferenceList(findAllIssueReferencesBytes([]byte(content), []string{}))
}
// FindRenderizableReferenceNumeric returns the first unvalidated reference found in a string.
func FindRenderizableReferenceNumeric(content string) (bool, *RenderizableReference) {
match := issueNumericPattern.FindStringSubmatchIndex(content)
if match == nil {
if match = crossReferenceIssueNumericPattern.FindStringSubmatchIndex(content); match == nil {
return false, nil
}
}
r := getCrossReference([]byte(content), match[2], match[3], false)
if r == nil {
return false, nil
}
return true, &RenderizableReference{
Issue: r.issue,
Owner: r.owner,
Name: r.name,
RefLocation: r.refLocation,
Action: r.action,
ActionLocation: r.actionLocation,
}
}
// FindRenderizableReferenceAlphanumeric returns the first alphanumeric unvalidated references found in a string.
func FindRenderizableReferenceAlphanumeric(content string) (bool, *RenderizableReference) {
match := issueAlphanumericPattern.FindStringSubmatchIndex(content)
if match == nil {
return false, nil
}
action, location := findActionKeywords([]byte(content), match[2])
return true, &RenderizableReference{
Issue: string(content[match[2]:match[3]]),
RefLocation: &RefSpan{Start: match[2], End: match[3]},
Action: action,
ActionLocation: location,
}
}
// FindAllIssueReferencesBytes returns a list of unvalidated references found in a byte slice.
func findAllIssueReferencesBytes(content []byte, links []string) []*rawReference {
ret := make([]*rawReference, 0, 10)
matches := issueNumericPattern.FindAllSubmatchIndex(content, -1)
for _, match := range matches {
if ref := getCrossReference(content, match[2], match[3], false); ref != nil {
ret = append(ret, ref)
}
}
matches = crossReferenceIssueNumericPattern.FindAllSubmatchIndex(content, -1)
for _, match := range matches {
if ref := getCrossReference(content, match[2], match[3], false); ref != nil {
ret = append(ret, ref)
}
}
localhost := getGiteaHostName()
for _, link := range links {
if u, err := url.Parse(link); err == nil {
// Note: we're not attempting to match the URL scheme (http/https)
host := strings.ToLower(u.Host)
if host != "" && host != localhost {
continue
}
parts := strings.Split(u.EscapedPath(), "/")
// /user/repo/issues/3
if len(parts) != 5 || parts[0] != "" {
continue
}
if parts[3] != "issues" && parts[3] != "pulls" {
continue
}
// Note: closing/reopening keywords not supported with URLs
bytes := []byte(parts[1] + "/" + parts[2] + "#" + parts[4])
if ref := getCrossReference(bytes, 0, len(bytes), true); ref != nil {
ref.refLocation = nil
ret = append(ret, ref)
}
}
}
return ret
}
func getCrossReference(content []byte, start, end int, fromLink bool) *rawReference {
refid := string(content[start:end])
parts := strings.Split(refid, "#")
if len(parts) != 2 {
return nil
}
repo, issue := parts[0], parts[1]
index, err := strconv.ParseInt(issue, 10, 64)
if err != nil {
return nil
}
if repo == "" {
if fromLink {
// Markdown links must specify owner/repo
return nil
}
action, location := findActionKeywords(content, start)
return &rawReference{
index: index,
action: action,
issue: issue,
refLocation: &RefSpan{Start: start, End: end},
actionLocation: location,
}
}
parts = strings.Split(strings.ToLower(repo), "/")
if len(parts) != 2 {
return nil
}
owner, name := parts[0], parts[1]
if !validNamePattern.MatchString(owner) || !validNamePattern.MatchString(name) {
return nil
}
action, location := findActionKeywords(content, start)
return &rawReference{
index: index,
owner: owner,
name: name,
action: action,
issue: issue,
refLocation: &RefSpan{Start: start, End: end},
actionLocation: location,
}
}
func findActionKeywords(content []byte, start int) (XRefAction, *RefSpan) {
newKeywords()
var m []int
if issueCloseKeywordsPat != nil {
m = issueCloseKeywordsPat.FindSubmatchIndex(content[:start])
if m != nil {
return XRefActionCloses, &RefSpan{Start: m[2], End: m[3]}
}
}
if issueReopenKeywordsPat != nil {
m = issueReopenKeywordsPat.FindSubmatchIndex(content[:start])
if m != nil {
return XRefActionReopens, &RefSpan{Start: m[2], End: m[3]}
}
}
return XRefActionNone, nil
}
|