Use native git variants by default with go-git variants as build tag (#13673)

* Move last commit cache back into modules/git

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

* Remove go-git from the interface for last commit cache

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

* move cacheref to last_commit_cache

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

* Remove go-git from routers/private/hook

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

* Move FindLFSFiles to pipeline

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

* Make no-go-git variants

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

* Submodule RefID

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

* fix issue with GetCommitsInfo

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

* fix GetLastCommitForPaths

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

* Improve efficiency

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

* More efficiency

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

* even faster

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

* Reduce duplication

* As per @lunny

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

* attempt to fix drone

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

* fix test-tags

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

* default to use no-go-git variants and add gogit build tag

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

* placate lint

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

* as per @6543

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

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

1 files changed, 95 insertions, 0 deletions

diff --git a/modules/git/signature_nogogit.go b/modules/git/signature_nogogit.go
new file mode 100644
index 0000000000..753d87b605
--- /dev/null
+++ b/modules/git/signature_nogogit.go
@@ -0,0 +1,95 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// 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.
+
+// +build !gogit
+
+package git
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+	"time"
+)
+
+// Signature represents the Author or Committer information.
+type Signature struct {
+	// Name represents a person name. It is an arbitrary string.
+	Name string
+	// Email is an email, but it cannot be assumed to be well-formed.
+	Email string
+	// When is the timestamp of the signature.
+	When time.Time
+}
+
+func (s *Signature) String() string {
+	return fmt.Sprintf("%s <%s>", s.Name, s.Email)
+}
+
+// Decode decodes a byte array representing a signature to signature
+func (s *Signature) Decode(b []byte) {
+	sig, _ := newSignatureFromCommitline(b)
+	s.Email = sig.Email
+	s.Name = sig.Name
+	s.When = sig.When
+}
+
+// Helper to get a signature from the commit line, which looks like these:
+//     author Patrick Gundlach <gundlach@speedata.de> 1378823654 +0200
+//     author Patrick Gundlach <gundlach@speedata.de> Thu, 07 Apr 2005 22:13:13 +0200
+// but without the "author " at the beginning (this method should)
+// be used for author and committer.
+func newSignatureFromCommitline(line []byte) (sig *Signature, err error) {
+	sig = new(Signature)
+	emailStart := bytes.LastIndexByte(line, '<')
+	emailEnd := bytes.LastIndexByte(line, '>')
+	if emailStart == -1 || emailEnd == -1 || emailEnd < emailStart {
+		return
+	}
+
+	sig.Name = string(line[:emailStart-1])
+	sig.Email = string(line[emailStart+1 : emailEnd])
+
+	hasTime := emailEnd+2 < len(line)
+	if !hasTime {
+		return
+	}
+
+	// Check date format.
+	firstChar := line[emailEnd+2]
+	if firstChar >= 48 && firstChar <= 57 {
+		idx := bytes.IndexByte(line[emailEnd+2:], ' ')
+		if idx < 0 {
+			return
+		}
+
+		timestring := string(line[emailEnd+2 : emailEnd+2+idx])
+		seconds, _ := strconv.ParseInt(timestring, 10, 64)
+		sig.When = time.Unix(seconds, 0)
+
+		idx += emailEnd + 3
+		if idx >= len(line) || idx+5 > len(line) {
+			return
+		}
+
+		timezone := string(line[idx : idx+5])
+		tzhours, err1 := strconv.ParseInt(timezone[0:3], 10, 64)
+		tzmins, err2 := strconv.ParseInt(timezone[3:], 10, 64)
+		if err1 != nil || err2 != nil {
+			return
+		}
+		if tzhours < 0 {
+			tzmins *= -1
+		}
+		tz := time.FixedZone("", int(tzhours*60*60+tzmins*60))
+		sig.When = sig.When.In(tz)
+	} else {
+		sig.When, err = time.Parse(GitTimeLayout, string(line[emailEnd+2:]))
+		if err != nil {
+			return
+		}
+	}
+	return
+}