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Fix modified files list in webhooks when there is a space (#16288)

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* Fix modified files list in webhooks when there is a space

There is an unfortunate bug with GetCommitFileStatus where files with
spaces are misparsed and split at the space.

There is a second bug because modern gits detect renames meaning that
this function no longer works correctly.

There is a third bug in that merge commits don't have their modified
files detected correctly.

Fix #15865


Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-07-02 20:23:37 +01:00 committed by GitHub
parent 836884429a
commit 62c278e4ab
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 152 additions and 18 deletions
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64
modules/git/commit.go
View file

@ -15,6 +15,8 @@ import (
"os/exec"
"strconv"
"strings"
"code.gitea.io/gitea/modules/log"
)
// Commit represents a git commit.
@ -432,33 +434,59 @@ func NewCommitFileStatus() *CommitFileStatus {
}
}
func parseCommitFileStatus(fileStatus *CommitFileStatus, stdout io.Reader) {
rd := bufio.NewReader(stdout)
peek, err := rd.Peek(1)
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
if peek[0] == '\n' || peek[0] == '\x00' {
_, _ = rd.Discard(1)
}
for {
modifier, err := rd.ReadSlice('\x00')
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
file, err := rd.ReadString('\x00')
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
file = file[:len(file)-1]
switch modifier[0] {
case 'A':
fileStatus.Added = append(fileStatus.Added, file)
case 'D':
fileStatus.Removed = append(fileStatus.Removed, file)
case 'M':
fileStatus.Modified = append(fileStatus.Modified, file)
}
}
}
// GetCommitFileStatus returns file status of commit in given repository.
func GetCommitFileStatus(repoPath, commitID string) (*CommitFileStatus, error) {
stdout, w := io.Pipe()
done := make(chan struct{})
fileStatus := NewCommitFileStatus()
go func() {
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
fields := strings.Fields(scanner.Text())
if len(fields) < 2 {
continue
}
switch fields[0][0] {
case 'A':
fileStatus.Added = append(fileStatus.Added, fields[1])
case 'D':
fileStatus.Removed = append(fileStatus.Removed, fields[1])
case 'M':
fileStatus.Modified = append(fileStatus.Modified, fields[1])
}
}
done <- struct{}{}
parseCommitFileStatus(fileStatus, stdout)
close(done)
}()
stderr := new(bytes.Buffer)
err := NewCommand("show", "--name-status", "--pretty=format:''", commitID).RunInDirPipeline(repoPath, w, stderr)
args := []string{"log", "--name-status", "-c", "--pretty=format:", "--parents", "--no-renames", "-z", "-1", commitID}
err := NewCommand(args...).RunInDirPipeline(repoPath, w, stderr)
w.Close() // Close writer to exit parsing goroutine
if err != nil {
return nil, ConcatenateError(err, stderr.String())

106
modules/git/commit_test.go
View file

@ -130,3 +130,109 @@ func TestHasPreviousCommit(t *testing.T) {
assert.NoError(t, err)
assert.False(t, selfNot)
}
func TestParseCommitFileStatus(t *testing.T) {
type testcase struct {
output string
added []string
removed []string
modified []string
}
kases := []testcase{
{
// Merge commit
output: "MM\x00options/locale/locale_en-US.ini\x00",
modified: []string{
"options/locale/locale_en-US.ini",
},
added: []string{},
removed: []string{},
},
{
// Spaces commit
output: "D\x00b\x00D\x00b b/b\x00A\x00b b/b b/b b/b\x00A\x00b b/b b/b b/b b/b\x00",
removed: []string{
"b",
"b b/b",
},
modified: []string{},
added: []string{
"b b/b b/b b/b",
"b b/b b/b b/b b/b",
},
},
{
// larger commit
output: "M\x00go.mod\x00M\x00go.sum\x00M\x00modules/ssh/ssh.go\x00M\x00vendor/github.com/gliderlabs/ssh/circle.yml\x00M\x00vendor/github.com/gliderlabs/ssh/context.go\x00A\x00vendor/github.com/gliderlabs/ssh/go.mod\x00A\x00vendor/github.com/gliderlabs/ssh/go.sum\x00M\x00vendor/github.com/gliderlabs/ssh/server.go\x00M\x00vendor/github.com/gliderlabs/ssh/session.go\x00M\x00vendor/github.com/gliderlabs/ssh/ssh.go\x00M\x00vendor/golang.org/x/sys/unix/mkerrors.sh\x00M\x00vendor/golang.org/x/sys/unix/syscall_darwin.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_darwin_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_darwin_arm64.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_freebsd_386.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_freebsd_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_freebsd_arm.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_freebsd_arm64.go\x00M\x00vendor/golang.org/x/sys/unix/zerrors_linux.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_darwin_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_darwin_arm64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_dragonfly_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_freebsd_386.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_freebsd_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_freebsd_arm.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_freebsd_arm64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_netbsd_386.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_netbsd_amd64.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_netbsd_arm.go\x00M\x00vendor/golang.org/x/sys/unix/ztypes_netbsd_arm64.go\x00M\x00vendor/modules.txt\x00",
modified: []string{
"go.mod",
"go.sum",
"modules/ssh/ssh.go",
"vendor/github.com/gliderlabs/ssh/circle.yml",
"vendor/github.com/gliderlabs/ssh/context.go",
"vendor/github.com/gliderlabs/ssh/server.go",
"vendor/github.com/gliderlabs/ssh/session.go",
"vendor/github.com/gliderlabs/ssh/ssh.go",
"vendor/golang.org/x/sys/unix/mkerrors.sh",
"vendor/golang.org/x/sys/unix/syscall_darwin.go",
"vendor/golang.org/x/sys/unix/zerrors_darwin_amd64.go",
"vendor/golang.org/x/sys/unix/zerrors_darwin_arm64.go",
"vendor/golang.org/x/sys/unix/zerrors_freebsd_386.go",
"vendor/golang.org/x/sys/unix/zerrors_freebsd_amd64.go",
"vendor/golang.org/x/sys/unix/zerrors_freebsd_arm.go",
"vendor/golang.org/x/sys/unix/zerrors_freebsd_arm64.go",
"vendor/golang.org/x/sys/unix/zerrors_linux.go",
"vendor/golang.org/x/sys/unix/ztypes_darwin_amd64.go",
"vendor/golang.org/x/sys/unix/ztypes_darwin_arm64.go",
"vendor/golang.org/x/sys/unix/ztypes_dragonfly_amd64.go",
"vendor/golang.org/x/sys/unix/ztypes_freebsd_386.go",
"vendor/golang.org/x/sys/unix/ztypes_freebsd_amd64.go",
"vendor/golang.org/x/sys/unix/ztypes_freebsd_arm.go",
"vendor/golang.org/x/sys/unix/ztypes_freebsd_arm64.go",
"vendor/golang.org/x/sys/unix/ztypes_netbsd_386.go",
"vendor/golang.org/x/sys/unix/ztypes_netbsd_amd64.go",
"vendor/golang.org/x/sys/unix/ztypes_netbsd_arm.go",
"vendor/golang.org/x/sys/unix/ztypes_netbsd_arm64.go",
"vendor/modules.txt",
},
added: []string{
"vendor/github.com/gliderlabs/ssh/go.mod",
"vendor/github.com/gliderlabs/ssh/go.sum",
},
removed: []string{},
},
{
// git 1.7.2 adds an unnecessary \x00 on merge commit
output: "\x00MM\x00options/locale/locale_en-US.ini\x00",
modified: []string{
"options/locale/locale_en-US.ini",
},
added: []string{},
removed: []string{},
},
{
// git 1.7.2 adds an unnecessary \n on normal commit
output: "\nD\x00b\x00D\x00b b/b\x00A\x00b b/b b/b b/b\x00A\x00b b/b b/b b/b b/b\x00",
removed: []string{
"b",
"b b/b",
},
modified: []string{},
added: []string{
"b b/b b/b b/b",
"b b/b b/b b/b b/b",
},
},
}
for _, kase := range kases {
fileStatus := NewCommitFileStatus()
parseCommitFileStatus(fileStatus, strings.NewReader(kase.output))
assert.Equal(t, kase.added, fileStatus.Added)
assert.Equal(t, kase.removed, fileStatus.Removed)
assert.Equal(t, kase.modified, fileStatus.Modified)
}
}