Show git-notes (#6984)

* Show git-notes

* Make git-notes heading text localizable

* Refactor git-notes data fetching to a separate function

* Display the author and time of git notes

* Move note bubble inside the commit bubble

* Revert "Move note bubble inside the commit bubble"

This reverts commit c0951fe0e3b4dea38064515546b1825c1bcf19e1.

* Add test for git-notes

* testing ui

* Polish CSS

* Apply suggestions from code review

Co-Authored-By: Lauris BH <lauris@nix.lv>

13 files changed, 146 insertions, 1 deletions

diff --git a/modules/git/notes.go b/modules/git/notes.go
new file mode 100644
index 0000000000..7aa5d89a79
--- /dev/null
+++ b/modules/git/notes.go
@@ -0,0 +1,60 @@
+// 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 git
+
+import (
+	"io/ioutil"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+)
+
+// NotesRef is the git ref where Gitea will look for git-notes data.
+// The value ("refs/notes/commits") is the default ref used by git-notes.
+const NotesRef = "refs/notes/commits"
+
+// Note stores information about a note created using git-notes.
+type Note struct {
+	Message []byte
+	Commit  *Commit
+}
+
+// GetNote retrieves the git-notes data for a given commit.
+func GetNote(repo *Repository, commitID string, note *Note) error {
+	notes, err := repo.GetCommit(NotesRef)
+	if err != nil {
+		return err
+	}
+
+	entry, err := notes.GetTreeEntryByPath(commitID)
+	if err != nil {
+		return err
+	}
+
+	blob := entry.Blob()
+	dataRc, err := blob.DataAsync()
+	if err != nil {
+		return err
+	}
+
+	defer dataRc.Close()
+	d, err := ioutil.ReadAll(dataRc)
+	if err != nil {
+		return err
+	}
+	note.Message = d
+
+	commit, err := repo.gogitRepo.CommitObject(plumbing.Hash(notes.ID))
+	if err != nil {
+		return err
+	}
+
+	lastCommits, err := getLastCommitForPaths(commit, "", []string{commitID})
+	if err != nil {
+		return err
+	}
+	note.Commit = convertCommit(lastCommits[commitID])
+
+	return nil
+}
diff --git a/modules/git/notes_test.go b/modules/git/notes_test.go
new file mode 100644
index 0000000000..a954377f54
--- /dev/null
+++ b/modules/git/notes_test.go
@@ -0,0 +1,24 @@
+// 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 git
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetNotes(t *testing.T) {
+	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
+	bareRepo1, err := OpenRepository(bareRepo1Path)
+	assert.NoError(t, err)
+
+	note := Note{}
+	err = GetNote(bareRepo1, "95bb4d39648ee7e325106df01a621c530863a653", &note)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("Note contents\n"), note.Message)
+	assert.Equal(t, "Vladimir Panteleev", note.Commit.Author.Name)
+}
diff --git a/modules/git/repo_ref_test.go b/modules/git/repo_ref_test.go
index 2a3ea26a76..d32b34994c 100644
--- a/modules/git/repo_ref_test.go
+++ b/modules/git/repo_ref_test.go
@@ -19,13 +19,14 @@ func TestRepository_GetRefs(t *testing.T) {
 	refs, err := bareRepo1.GetRefs()
 
 	assert.NoError(t, err)
-	assert.Len(t, refs, 4)
+	assert.Len(t, refs, 5)
 
 	expectedRefs := []string{
 		BranchPrefix + "branch1",
 		BranchPrefix + "branch2",
 		BranchPrefix + "master",
 		TagPrefix + "test",
+		NotesRef,
 	}
 
 	for _, ref := range refs {
diff --git a/modules/git/tests/repos/repo1_bare/objects/28/345b214c5967bd9cdd98cc7f88f2f1ac574e02 b/modules/git/tests/repos/repo1_bare/objects/28/345b214c5967bd9cdd98cc7f88f2f1ac574e02
new file mode 100644
index 0000000000..05dc4725ea
--- /dev/null
+++ b/modules/git/tests/repos/repo1_bare/objects/28/345b214c5967bd9cdd98cc7f88f2f1ac574e02
diff --git a/modules/git/tests/repos/repo1_bare/objects/a4/79ead1abb694ffca26f67b09c8313b12fa2a13 b/modules/git/tests/repos/repo1_bare/objects/a4/79ead1abb694ffca26f67b09c8313b12fa2a13
new file mode 100644
index 0000000000..35d27dcbe7
--- /dev/null
+++ b/modules/git/tests/repos/repo1_bare/objects/a4/79ead1abb694ffca26f67b09c8313b12fa2a13
diff --git a/modules/git/tests/repos/repo1_bare/objects/ca/6b5ddf303169a72d2a2971acde4f6eea194e5c b/modules/git/tests/repos/repo1_bare/objects/ca/6b5ddf303169a72d2a2971acde4f6eea194e5c
new file mode 100644
index 0000000000..d4c2138b15
--- /dev/null
+++ b/modules/git/tests/repos/repo1_bare/objects/ca/6b5ddf303169a72d2a2971acde4f6eea194e5c
@@ -0,0 +1,4 @@
+x
��M
+�0F]���B�&&m"�@\�Of�6�HG����
+~˷x��y���� ��?[����B�&
+H<b�yߙNGt��ڨ��~.�"�1x�Ix`����&=㚸,}��{�X����	�p��)���j�}^ 1AZ����3�,��
��I0
\ No newline at end of file
diff --git a/modules/git/tests/repos/repo1_bare/refs/notes/commits b/modules/git/tests/repos/repo1_bare/refs/notes/commits
new file mode 100644
index 0000000000..c88ca2188b
--- /dev/null
+++ b/modules/git/tests/repos/repo1_bare/refs/notes/commits
@@ -0,0 +1 @@
+ca6b5ddf303169a72d2a2971acde4f6eea194e5c
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index 24a383252b..098a642556 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -125,6 +125,7 @@ func NewFuncMap() []template.FuncMap {
 		"RenderCommitMessage":      RenderCommitMessage,
 		"RenderCommitMessageLink":  RenderCommitMessageLink,
 		"RenderCommitBody":         RenderCommitBody,
+		"RenderNote":               RenderNote,
 		"IsMultilineCommitMessage": IsMultilineCommitMessage,
 		"ThemeColorMetaTag": func() string {
 			return setting.UI.ThemeColorMetaTag
@@ -392,6 +393,17 @@ func RenderCommitBody(msg, urlPrefix string, metas map[string]string) template.H
 	return template.HTML(strings.Join(body[1:], "\n"))
 }
 
+// RenderNote renders the contents of a git-notes file as a commit message.
+func RenderNote(msg, urlPrefix string, metas map[string]string) template.HTML {
+	cleanMsg := template.HTMLEscapeString(msg)
+	fullMessage, err := markup.RenderCommitMessage([]byte(cleanMsg), urlPrefix, "", metas)
+	if err != nil {
+		log.Error("RenderNote: %v", err)
+		return ""
+	}
+	return template.HTML(string(fullMessage))
+}
+
 // IsMultilineCommitMessage checks to see if a commit message contains multiple lines.
 func IsMultilineCommitMessage(msg string) bool {
 	return strings.Count(strings.TrimSpace(msg), "\n") >= 1
diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index f08bc6b5a5..d2079415d0 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -1314,6 +1314,7 @@ settings.unarchive.error = An error occured while trying to un-archive the repo.
 diff.browse_source = Browse Source
 diff.parent = parent
 diff.commit = commit
+diff.git-notes = Notes
 diff.data_not_available = Diff Content Not Available
 diff.show_diff_stats = Show Diff Stats
 diff.show_split_view = Split View
diff --git a/public/css/index.css b/public/css/index.css
index fa449ec69f..8cea4e2c1d 100644
--- a/public/css/index.css
+++ b/public/css/index.css
@@ -803,6 +803,8 @@ footer .ui.left,footer .ui.right{line-height:40px}
 .stats-table .table-cell.tiny{height:.5em}
 tbody.commit-list{vertical-align:baseline}
 .commit-body{white-space:pre-wrap}
+.git-notes.top{text-align:left}
+.git-notes .commit-body{margin:0}
 @media only screen and (max-width:767px){.ui.stackable.menu.mobile--margin-between-items>.item{margin-top:5px;margin-bottom:5px}
 .ui.stackable.menu.mobile--no-negative-margins{margin-left:0;margin-right:0}
 }
diff --git a/public/less/_repository.less b/public/less/_repository.less
index 5970b366e2..9956bbce74 100644
--- a/public/less/_repository.less
+++ b/public/less/_repository.less
@@ -2219,6 +2219,15 @@ tbody.commit-list {
     white-space: pre-wrap;
 }
 
+.git-notes {
+    &.top {
+        text-align: left;
+    }
+    .commit-body {
+        margin: 0;
+    }
+}
+
 @media only screen and (max-width: 767px) {
     .ui.stackable.menu {
         &.mobile--margin-between-items > .item {
diff --git a/routers/repo/commit.go b/routers/repo/commit.go
index 2978eda6c0..870ff568f3 100644
--- a/routers/repo/commit.go
+++ b/routers/repo/commit.go
@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
 )
 
 const (
@@ -246,6 +247,15 @@ func Diff(ctx *context.Context) {
 	ctx.Data["Parents"] = parents
 	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0
 	ctx.Data["SourcePath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "src", "commit", commitID)
+
+	note := &git.Note{}
+	err = git.GetNote(ctx.Repo.GitRepo, commitID, note)
+	if err == nil {
+		ctx.Data["Note"] = string(templates.ToUTF8WithFallback(note.Message))
+		ctx.Data["NoteCommit"] = note.Commit
+		ctx.Data["NoteAuthor"] = models.ValidateCommitWithEmail(note.Commit)
+	}
+
 	if commit.ParentCount() > 0 {
 		ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "src", "commit", parents[0])
 	}
diff --git a/templates/repo/diff/page.tmpl b/templates/repo/diff/page.tmpl
index c8f5a3d9f0..c35e2a415b 100644
--- a/templates/repo/diff/page.tmpl
+++ b/templates/repo/diff/page.tmpl
@@ -65,6 +65,27 @@
 					</div>
 				{{end}}
 			{{end}}
+			{{if .Note}}
+				<div class="ui top attached info segment message git-notes">
+					<i class="sticky note icon"></i>
+					{{.i18n.Tr "repo.diff.git-notes"}}:
+					{{if .NoteAuthor}}
+						<a href="{{.NoteAuthor.HomeLink}}">
+							{{if .NoteAuthor.FullName}}
+							  <strong>{{.NoteAuthor.FullName}}</strong>
+							{{else}}
+							  <strong>{{.NoteCommit.Author.Name}}</strong>
+							{{end}}
+						</a>
+					{{else}}
+						<strong>{{.NoteCommit.Author.Name}}</strong>
+					{{end}}
+					<span class="text grey" id="note-authored-time">{{TimeSince .NoteCommit.Author.When $.Lang}}</span>
+				</div>
+				<div class="ui bottom attached info segment git-notes">
+					<pre class="commit-body">{{RenderNote .Note $.RepoLink $.Repository.ComposeMetas}}</pre>
+				</div>
+			{{end}}
 		{{end}}
 
 		{{template "repo/diff/box" .}}