Move git graph from models to modules/graph (#9027)

modules/gitgraph/graph.go

@@ -0,0 +1,110 @@
+// Copyright 2016 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 gitgraph
+
+import (
+	"fmt"
+	"strings"
+
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+// GraphItem represent one commit, or one relation in timeline
+type GraphItem struct {
+	GraphAcii    string
+	Relation     string
+	Branch       string
+	Rev          string
+	Date         string
+	Author       string
+	AuthorEmail  string
+	ShortRev     string
+	Subject      string
+	OnlyRelation bool
+}
+
+// GraphItems is a list of commits from all branches
+type GraphItems []GraphItem
+
+// GetCommitGraph return a list of commit (GraphItems) from all branches
+func GetCommitGraph(r *git.Repository, page int) (GraphItems, error) {
+
+	var CommitGraph []GraphItem
+
+	format := "DATA:|%d|%H|%ad|%an|%ae|%h|%s"
+
+	graphCmd := git.NewCommand("log")
+	graphCmd.AddArguments("--graph",
+		"--date-order",
+		"--all",
+		"-C",
+		"-M",
+		fmt.Sprintf("-n %d", setting.UI.GraphMaxCommitNum),
+		fmt.Sprintf("--skip=%d", setting.UI.GraphMaxCommitNum*(page-1)),
+		"--date=iso",
+		fmt.Sprintf("--pretty=format:%s", format),
+	)
+	graph, err := graphCmd.RunInDir(r.Path)
+	if err != nil {
+		return CommitGraph, err
+	}
+
+	CommitGraph = make([]GraphItem, 0, 100)
+	for _, s := range strings.Split(graph, "\n") {
+		GraphItem, err := graphItemFromString(s, r)
+		if err != nil {
+			return CommitGraph, err
+		}
+		CommitGraph = append(CommitGraph, GraphItem)
+	}
+
+	return CommitGraph, nil
+}
+
+func graphItemFromString(s string, r *git.Repository) (GraphItem, error) {
+
+	var ascii string
+	var data = "|||||||"
+	lines := strings.SplitN(s, "DATA:", 2)
+
+	switch len(lines) {
+	case 1:
+		ascii = lines[0]
+	case 2:
+		ascii = lines[0]
+		data = lines[1]
+	default:
+		return GraphItem{}, fmt.Errorf("Failed parsing grap line:%s. Expect 1 or two fields", s)
+	}
+
+	rows := strings.SplitN(data, "|", 8)
+	if len(rows) < 8 {
+		return GraphItem{}, fmt.Errorf("Failed parsing grap line:%s - Should containt 8 datafields", s)
+	}
+
+	/* // see format in getCommitGraph()
+	   0	Relation string
+	   1	Branch string
+	   2	Rev string
+	   3	Date string
+	   4	Author string
+	   5	AuthorEmail string
+	   6	ShortRev string
+	   7	Subject string
+	*/
+	gi := GraphItem{ascii,
+		rows[0],
+		rows[1],
+		rows[2],
+		rows[3],
+		rows[4],
+		rows[5],
+		rows[6],
+		rows[7],
+		len(rows[2]) == 0, // no commits referred to, only relation in current line.
+	}
+	return gi, nil
+}