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Check commit message hashes before making links (#7713) 

* Check commit message hashes before making links

Previously, when formatting commit messages, anything
that looked like SHA1 hashes was turned into a link
using regex. This meant that certain phrases or numbers
such as `777777` or `deadbeef` could be recognized as a commit
even if the repository has no commit with those hashes.

This change will make it so that anything that looks
like a SHA1 hash using regex will then also be checked
to ensure that there is a commit in the repository
with that hash before making a link.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Use gogit to check if commit exists

This commit modifies the commit hash check
in the render for commit messages to use
gogit for better performance.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Make code cleaner

Signed-off-by: Gary Kim <gary@garykim.dev>

* Use rev-parse to check if commit exists

Signed-off-by: Gary Kim <gary@garykim.dev>

* Add and modify tests for checking hashes in html link rendering

Signed-off-by: Gary Kim <gary@garykim.dev>

* Return error in sha1CurrentPatternProcessor

Co-Authored-By: mrsdizzie <info@mrsdizzie.com>

* Import Gitea log module

Signed-off-by: Gary Kim <gary@garykim.dev>

* Revert "Return error in sha1CurrentPatternProcessor"

This reverts commit 28f561cac4.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Add debug logging to sha1CurrentPatternProcessor

This will log errors by the git command run in
sha1CurrentPatternProcessor if the error is one
that was unexpected.

Signed-off-by: Gary Kim <gary@garykim.dev>
This commit is contained in:
Gary Kim 2019-08-14 08:04:55 +00:00 committed by Lunny Xiao
parent 46d6b92ad0
commit 7eed11e5e9
4 changed files with 34 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
models/repo.go
View File

@ -508,8 +508,9 @@ func (repo *Repository) mustOwnerName(e Engine) string {
func (repo *Repository) ComposeMetas() map[string]string {
if repo.ExternalMetas == nil {
repo.ExternalMetas = map[string]string{
"user": repo.MustOwner().Name,
"repo": repo.Name,
"user": repo.MustOwner().Name,
"repo": repo.Name,
"repoPath": repo.RepoPath(),
}
unit, err := repo.GetUnit(UnitTypeExternalTracker)
if err != nil {

14
modules/markup/html.go
View File

@ -13,6 +13,8 @@ import (
"strings"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
@ -646,6 +648,9 @@ func fullSha1PatternProcessor(ctx *postProcessCtx, node *html.Node) {
// sha1CurrentPatternProcessor renders SHA1 strings to corresponding links that
// are assumed to be in the same repository.
func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
if ctx.metas == nil || ctx.metas["user"] == "" || ctx.metas["repo"] == "" || ctx.metas["repoPath"] == "" {
return
}
m := sha1CurrentPattern.FindStringSubmatchIndex(node.Data)
if m == nil {
return
@ -657,6 +662,15 @@ func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
// but that is not always the case.
// Although unlikely, deadbeef and 1234567 are valid short forms of SHA1 hash
// as used by git and github for linking and thus we have to do similar.
// Because of this, we check to make sure that a matched hash is actually
// a commit in the repository before making it a link.
if _, err := git.NewCommand("rev-parse", "--verify", hash).RunInDirBytes(ctx.metas["repoPath"]); err != nil {
if !strings.Contains(err.Error(), "fatal: Needed a single revision") {
log.Debug("sha1CurrentPatternProcessor git rev-parse: %v", err)
}
return
}
replaceContent(node, m[2], m[3],
createCodeLink(util.URLJoin(setting.AppURL, ctx.metas["user"], ctx.metas["repo"], "commit", hash), base.ShortSha(hash)))
}

22
modules/markup/html_test.go
View File

@ -17,8 +17,9 @@ import (
)
var localMetas = map[string]string{
"user": "gogits",
"repo": "gogs",
"user": "gogits",
"repo": "gogs",
"repoPath": "../../integrations/gitea-repositories-meta/user13/repo11.git/",
}
func TestRender_Commits(t *testing.T) {
@ -30,19 +31,20 @@ func TestRender_Commits(t *testing.T) {
assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
}
var sha = "b6dd6210eaebc915fd5be5579c58cce4da2e2579"
var sha = "65f1bf27bc3bf70f64657658635e66094edbcb4d"
var commit = util.URLJoin(AppSubURL, "commit", sha)
var subtree = util.URLJoin(commit, "src")
var tree = strings.Replace(subtree, "/commit/", "/tree/", -1)
test(sha, `<p><a href="`+commit+`" rel="nofollow"><code>b6dd6210ea</code></a></p>`)
test(sha[:7], `<p><a href="`+commit[:len(commit)-(40-7)]+`" rel="nofollow"><code>b6dd621</code></a></p>`)
test(sha[:39], `<p><a href="`+commit[:len(commit)-(40-39)]+`" rel="nofollow"><code>b6dd6210ea</code></a></p>`)
test(commit, `<p><a href="`+commit+`" rel="nofollow"><code>b6dd6210ea</code></a></p>`)
test(tree, `<p><a href="`+tree+`" rel="nofollow"><code>b6dd6210ea/src</code></a></p>`)
test("commit "+sha, `<p>commit <a href="`+commit+`" rel="nofollow"><code>b6dd6210ea</code></a></p>`)
test(sha, `<p><a href="`+commit+`" rel="nofollow"><code>65f1bf27bc</code></a></p>`)
test(sha[:7], `<p><a href="`+commit[:len(commit)-(40-7)]+`" rel="nofollow"><code>65f1bf2</code></a></p>`)
test(sha[:39], `<p><a href="`+commit[:len(commit)-(40-39)]+`" rel="nofollow"><code>65f1bf27bc</code></a></p>`)
test(commit, `<p><a href="`+commit+`" rel="nofollow"><code>65f1bf27bc</code></a></p>`)
test(tree, `<p><a href="`+tree+`" rel="nofollow"><code>65f1bf27bc/src</code></a></p>`)
test("commit "+sha, `<p>commit <a href="`+commit+`" rel="nofollow"><code>65f1bf27bc</code></a></p>`)
test("/home/gitea/"+sha, "<p>/home/gitea/"+sha+"</p>")
test("deadbeef", `<p>deadbeef</p>`)
test("d27ace93", `<p>d27ace93</p>`)
}
func TestRender_CrossReferences(t *testing.T) {

9
modules/markup/markdown/markdown_test.go
View File

@ -21,8 +21,9 @@ const AppSubURL = AppURL + Repo + "/"
// these values should match the Repo const above
var localMetas = map[string]string{
"user": "gogits",
"repo": "gogs",
"user": "gogits",
"repo": "gogs",
"repoPath": "../../../integrations/gitea-repositories-meta/user13/repo11.git/",
}
func TestRender_StandardLinks(t *testing.T) {
@ -103,7 +104,7 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
<li><a href="` + baseURLContent + `/Tips" rel="nofollow">Tips</a></li>
</ul>
<p>See commit <a href="http://localhost:3000/gogits/gogs/commit/fc7f44dadf" rel="nofollow"><code>fc7f44dadf</code></a></p>
<p>See commit <a href="http://localhost:3000/gogits/gogs/commit/65f1bf27bc" rel="nofollow"><code>65f1bf27bc</code></a></p>
<p>Ideas and codes</p>
@ -194,7 +195,7 @@ var sameCases = []string{
- [[Links, Language bindings, Engine bindings|Links]]
- [[Tips]]
See commit fc7f44dadf
See commit 65f1bf27bc
Ideas and codes