[gitea] week 2025-07 cherry pick (gitea/main -> forgejo) (#6865)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/6865
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
This commit is contained in:
Gusted 2025-02-11 16:22:58 +00:00
commit 5509ce5557
20 changed files with 200 additions and 6 deletions

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// Copyright 2016 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package gitgraph
import (
"bufio"
"bytes"
"context"
"os"
"strings"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/setting"
)
// GetCommitGraph return a list of commit (GraphItems) from all branches
func GetCommitGraph(r *git.Repository, page, maxAllowedColors int, hidePRRefs bool, branches, files []string) (*Graph, error) {
format := "DATA:%D|%H|%aD|%h|%s"
if page == 0 {
page = 1
}
graphCmd := git.NewCommand(r.Ctx, "log", "--graph", "--date-order", "--decorate=full")
if hidePRRefs {
graphCmd.AddArguments("--exclude=" + git.PullPrefix + "*")
}
if len(branches) == 0 {
graphCmd.AddArguments("--all")
}
graphCmd.AddArguments("-C", "-M", "--date=iso").
AddOptionFormat("-n %d", setting.UI.GraphMaxCommitNum*page).
AddOptionFormat("--pretty=format:%s", format)
if len(branches) > 0 {
graphCmd.AddDynamicArguments(branches...)
}
if len(files) > 0 {
graphCmd.AddDashesAndList(files...)
}
graph := NewGraph()
stderr := new(strings.Builder)
stdoutReader, stdoutWriter, err := os.Pipe()
if err != nil {
return nil, err
}
commitsToSkip := setting.UI.GraphMaxCommitNum * (page - 1)
scanner := bufio.NewScanner(stdoutReader)
if err := graphCmd.Run(&git.RunOpts{
Dir: r.Path,
Stdout: stdoutWriter,
Stderr: stderr,
PipelineFunc: func(ctx context.Context, cancel context.CancelFunc) error {
_ = stdoutWriter.Close()
defer stdoutReader.Close()
parser := &Parser{}
parser.firstInUse = -1
parser.maxAllowedColors = maxAllowedColors
if maxAllowedColors > 0 {
parser.availableColors = make([]int, maxAllowedColors)
for i := range parser.availableColors {
parser.availableColors[i] = i + 1
}
} else {
parser.availableColors = []int{1, 2}
}
for commitsToSkip > 0 && scanner.Scan() {
line := scanner.Bytes()
dataIdx := bytes.Index(line, []byte("DATA:"))
if dataIdx < 0 {
dataIdx = len(line)
}
starIdx := bytes.IndexByte(line, '*')
if starIdx >= 0 && starIdx < dataIdx {
commitsToSkip--
}
parser.ParseGlyphs(line[:dataIdx])
}
row := 0
// Skip initial non-commit lines
for scanner.Scan() {
line := scanner.Bytes()
if bytes.IndexByte(line, '*') >= 0 {
if err := parser.AddLineToGraph(graph, row, line); err != nil {
cancel()
return err
}
break
}
parser.ParseGlyphs(line)
}
for scanner.Scan() {
row++
line := scanner.Bytes()
if err := parser.AddLineToGraph(graph, row, line); err != nil {
cancel()
return err
}
}
return scanner.Err()
},
}); err != nil {
return graph, err
}
return graph, nil
}

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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package gitgraph
import (
"bytes"
"context"
"fmt"
"strings"
"time"
asymkey_model "code.gitea.io/gitea/models/asymkey"
"code.gitea.io/gitea/models/db"
git_model "code.gitea.io/gitea/models/git"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// NewGraph creates a basic graph
func NewGraph() *Graph {
graph := &Graph{}
graph.relationCommit = &Commit{
Row: -1,
Column: -1,
}
graph.Flows = map[int64]*Flow{}
return graph
}
// Graph represents a collection of flows
type Graph struct {
Flows map[int64]*Flow
Commits []*Commit
MinRow int
MinColumn int
MaxRow int
MaxColumn int
relationCommit *Commit
}
// Width returns the width of the graph
func (graph *Graph) Width() int {
return graph.MaxColumn - graph.MinColumn + 1
}
// Height returns the height of the graph
func (graph *Graph) Height() int {
return graph.MaxRow - graph.MinRow + 1
}
// AddGlyph adds glyph to flows
func (graph *Graph) AddGlyph(row, column int, flowID int64, color int, glyph byte) {
flow, ok := graph.Flows[flowID]
if !ok {
flow = NewFlow(flowID, color, row, column)
graph.Flows[flowID] = flow
}
flow.AddGlyph(row, column, glyph)
if row < graph.MinRow {
graph.MinRow = row
}
if row > graph.MaxRow {
graph.MaxRow = row
}
if column < graph.MinColumn {
graph.MinColumn = column
}
if column > graph.MaxColumn {
graph.MaxColumn = column
}
}
// AddCommit adds a commit at row, column on flowID with the provided data
func (graph *Graph) AddCommit(row, column int, flowID int64, data []byte) error {
commit, err := NewCommit(row, column, data)
if err != nil {
return err
}
commit.Flow = flowID
graph.Commits = append(graph.Commits, commit)
graph.Flows[flowID].Commits = append(graph.Flows[flowID].Commits, commit)
return nil
}
// LoadAndProcessCommits will load the git.Commits for each commit in the graph,
// the associate the commit with the user author, and check the commit verification
// before finally retrieving the latest status
func (graph *Graph) LoadAndProcessCommits(ctx context.Context, repository *repo_model.Repository, gitRepo *git.Repository) error {
var err error
var ok bool
emails := map[string]*user_model.User{}
keyMap := map[string]bool{}
for _, c := range graph.Commits {
if len(c.Rev) == 0 {
continue
}
c.Commit, err = gitRepo.GetCommit(c.Rev)
if err != nil {
return fmt.Errorf("GetCommit: %s Error: %w", c.Rev, err)
}
if c.Commit.Author != nil {
email := c.Commit.Author.Email
if c.User, ok = emails[email]; !ok {
c.User, _ = user_model.GetUserByEmail(ctx, email)
emails[email] = c.User
}
}
c.Verification = asymkey_model.ParseCommitWithSignature(ctx, c.Commit)
_ = asymkey_model.CalculateTrustStatus(c.Verification, repository.GetTrustModel(), func(user *user_model.User) (bool, error) {
return repo_model.IsOwnerMemberCollaborator(ctx, repository, user.ID)
}, &keyMap)
statuses, _, err := git_model.GetLatestCommitStatus(ctx, repository.ID, c.Commit.ID.String(), db.ListOptions{})
if err != nil {
log.Error("GetLatestCommitStatus: %v", err)
} else {
c.Status = git_model.CalcCommitStatus(statuses)
}
}
return nil
}
// NewFlow creates a new flow
func NewFlow(flowID int64, color, row, column int) *Flow {
return &Flow{
ID: flowID,
ColorNumber: color,
MinRow: row,
MinColumn: column,
MaxRow: row,
MaxColumn: column,
}
}
// Flow represents a series of glyphs
type Flow struct {
ID int64
ColorNumber int
Glyphs []Glyph
Commits []*Commit
MinRow int
MinColumn int
MaxRow int
MaxColumn int
}
// Color16 wraps the color numbers around mod 16
func (flow *Flow) Color16() int {
return flow.ColorNumber % 16
}
// AddGlyph adds glyph at row and column
func (flow *Flow) AddGlyph(row, column int, glyph byte) {
if row < flow.MinRow {
flow.MinRow = row
}
if row > flow.MaxRow {
flow.MaxRow = row
}
if column < flow.MinColumn {
flow.MinColumn = column
}
if column > flow.MaxColumn {
flow.MaxColumn = column
}
flow.Glyphs = append(flow.Glyphs, Glyph{
row,
column,
glyph,
})
}
// Glyph represents a coordinate and glyph
type Glyph struct {
Row int
Column int
Glyph byte
}
// RelationCommit represents an empty relation commit
var RelationCommit = &Commit{
Row: -1,
}
// NewCommit creates a new commit from a provided line
func NewCommit(row, column int, line []byte) (*Commit, error) {
data := bytes.SplitN(line, []byte("|"), 5)
if len(data) < 5 {
return nil, fmt.Errorf("malformed data section on line %d with commit: %s", row, string(line))
}
// Format is a slight modifcation from RFC1123Z
t, err := time.Parse("Mon, _2 Jan 2006 15:04:05 -0700", string(data[2]))
if err != nil {
return nil, fmt.Errorf("could not parse date of commit: %w", err)
}
return &Commit{
Row: row,
Column: column,
// 0 matches git log --pretty=format:%d => ref names, like the --decorate option of git-log(1)
Refs: newRefsFromRefNames(data[0]),
// 1 matches git log --pretty=format:%H => commit hash
Rev: string(data[1]),
// 2 matches git log --pretty=format:%aD => author date, RFC2822 style
Date: t,
// 3 matches git log --pretty=format:%h => abbreviated commit hash
ShortRev: string(data[3]),
// 4 matches git log --pretty=format:%s => subject
Subject: string(data[4]),
}, nil
}
func newRefsFromRefNames(refNames []byte) []git.Reference {
refBytes := bytes.Split(refNames, []byte{',', ' '})
refs := make([]git.Reference, 0, len(refBytes))
for _, refNameBytes := range refBytes {
if len(refNameBytes) == 0 {
continue
}
refName := string(refNameBytes)
if strings.HasPrefix(refName, "tag: ") {
refName = strings.TrimPrefix(refName, "tag: ")
} else {
refName = strings.TrimPrefix(refName, "HEAD -> ")
}
refs = append(refs, git.Reference{
Name: refName,
})
}
return refs
}
// Commit represents a commit at coordinate X, Y with the data
type Commit struct {
Commit *git.Commit
User *user_model.User
Verification *asymkey_model.ObjectVerification
Status *git_model.CommitStatus
Flow int64
Row int
Column int
Refs []git.Reference
Rev string
Date time.Time
ShortRev string
Subject string
}
// OnlyRelation returns whether this a relation only commit
func (c *Commit) OnlyRelation() bool {
return c.Row == -1
}

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// Copyright 2016 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package gitgraph
import (
"bytes"
"fmt"
"strings"
"testing"
"code.gitea.io/gitea/modules/git"
)
func BenchmarkGetCommitGraph(b *testing.B) {
currentRepo, err := git.OpenRepository(git.DefaultContext, ".")
if err != nil || currentRepo == nil {
b.Error("Could not open repository")
}
defer currentRepo.Close()
for i := 0; i < b.N; i++ {
graph, err := GetCommitGraph(currentRepo, 1, 0, false, nil, nil)
if err != nil {
b.Error("Could get commit graph")
}
if len(graph.Commits) < 100 {
b.Error("Should get 100 log lines.")
}
}
}
func BenchmarkParseCommitString(b *testing.B) {
testString := "* DATA:|4e61bacab44e9b4730e44a6615d04098dd3a8eaf|2016-12-20 21:10:41 +0100|4e61bac|Add route for graph"
parser := &Parser{}
parser.Reset()
for i := 0; i < b.N; i++ {
parser.Reset()
graph := NewGraph()
if err := parser.AddLineToGraph(graph, 0, []byte(testString)); err != nil {
b.Error("could not parse teststring")
}
if graph.Flows[1].Commits[0].Rev != "4e61bacab44e9b4730e44a6615d04098dd3a8eaf" {
b.Error("Did not get expected data")
}
}
}
func BenchmarkParseGlyphs(b *testing.B) {
parser := &Parser{}
parser.Reset()
tgBytes := []byte(testglyphs)
var tg []byte
for i := 0; i < b.N; i++ {
parser.Reset()
tg = tgBytes
idx := bytes.Index(tg, []byte("\n"))
for idx > 0 {
parser.ParseGlyphs(tg[:idx])
tg = tg[idx+1:]
idx = bytes.Index(tg, []byte("\n"))
}
}
}
func TestReleaseUnusedColors(t *testing.T) {
testcases := []struct {
availableColors []int
oldColors []int
firstInUse int // these values have to be either be correct or suggest less is
firstAvailable int // available than possibly is - i.e. you cannot say 10 is available when it
}{
{
availableColors: []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
oldColors: []int{1, 1, 1, 1, 1},
firstAvailable: -1,
firstInUse: 1,
},
{
availableColors: []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
oldColors: []int{1, 2, 3, 4},
firstAvailable: 6,
firstInUse: 0,
},
{
availableColors: []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
oldColors: []int{6, 0, 3, 5, 3, 4, 0, 0},
firstAvailable: 6,
firstInUse: 0,
},
{
availableColors: []int{1, 2, 3, 4, 5, 6, 7},
oldColors: []int{6, 1, 3, 5, 3, 4, 2, 7},
firstAvailable: -1,
firstInUse: 0,
},
{
availableColors: []int{1, 2, 3, 4, 5, 6, 7},
oldColors: []int{6, 0, 3, 5, 3, 4, 2, 7},
firstAvailable: -1,
firstInUse: 0,
},
}
for _, testcase := range testcases {
parser := &Parser{}
parser.Reset()
parser.availableColors = append([]int{}, testcase.availableColors...)
parser.oldColors = append(parser.oldColors, testcase.oldColors...)
parser.firstAvailable = testcase.firstAvailable
parser.firstInUse = testcase.firstInUse
parser.releaseUnusedColors()
if parser.firstAvailable == -1 {
// All in use
for _, color := range parser.availableColors {
found := false
for _, oldColor := range parser.oldColors {
if oldColor == color {
found = true
break
}
}
if !found {
t.Errorf("In testcase:\n%d\t%d\t%d %d =>\n%d\t%d\t%d %d: %d should be available but is not",
testcase.availableColors,
testcase.oldColors,
testcase.firstAvailable,
testcase.firstInUse,
parser.availableColors,
parser.oldColors,
parser.firstAvailable,
parser.firstInUse,
color)
}
}
} else if parser.firstInUse != -1 {
// Some in use
for i := parser.firstInUse; i != parser.firstAvailable; i = (i + 1) % len(parser.availableColors) {
color := parser.availableColors[i]
found := false
for _, oldColor := range parser.oldColors {
if oldColor == color {
found = true
break
}
}
if !found {
t.Errorf("In testcase:\n%d\t%d\t%d %d =>\n%d\t%d\t%d %d: %d should be available but is not",
testcase.availableColors,
testcase.oldColors,
testcase.firstAvailable,
testcase.firstInUse,
parser.availableColors,
parser.oldColors,
parser.firstAvailable,
parser.firstInUse,
color)
}
}
for i := parser.firstAvailable; i != parser.firstInUse; i = (i + 1) % len(parser.availableColors) {
color := parser.availableColors[i]
found := false
for _, oldColor := range parser.oldColors {
if oldColor == color {
found = true
break
}
}
if found {
t.Errorf("In testcase:\n%d\t%d\t%d %d =>\n%d\t%d\t%d %d: %d should not be available but is",
testcase.availableColors,
testcase.oldColors,
testcase.firstAvailable,
testcase.firstInUse,
parser.availableColors,
parser.oldColors,
parser.firstAvailable,
parser.firstInUse,
color)
}
}
} else {
// None in use
for _, color := range parser.oldColors {
if color != 0 {
t.Errorf("In testcase:\n%d\t%d\t%d %d =>\n%d\t%d\t%d %d: %d should not be available but is",
testcase.availableColors,
testcase.oldColors,
testcase.firstAvailable,
testcase.firstInUse,
parser.availableColors,
parser.oldColors,
parser.firstAvailable,
parser.firstInUse,
color)
}
}
}
}
}
func TestParseGlyphs(t *testing.T) {
parser := &Parser{}
parser.Reset()
tgBytes := []byte(testglyphs)
tg := tgBytes
idx := bytes.Index(tg, []byte("\n"))
row := 0
for idx > 0 {
parser.ParseGlyphs(tg[:idx])
tg = tg[idx+1:]
idx = bytes.Index(tg, []byte("\n"))
if parser.flows[0] != 1 {
t.Errorf("First column flow should be 1 but was %d", parser.flows[0])
}
colorToFlow := map[int]int64{}
flowToColor := map[int64]int{}
for i, flow := range parser.flows {
if flow == 0 {
continue
}
color := parser.colors[i]
if fColor, in := flowToColor[flow]; in && fColor != color {
t.Errorf("Row %d column %d flow %d has color %d but should be %d", row, i, flow, color, fColor)
}
flowToColor[flow] = color
if cFlow, in := colorToFlow[color]; in && cFlow != flow {
t.Errorf("Row %d column %d flow %d has color %d but conflicts with flow %d", row, i, flow, color, cFlow)
}
colorToFlow[color] = flow
}
row++
}
if len(parser.availableColors) != 9 {
t.Errorf("Expected 9 colors but have %d", len(parser.availableColors))
}
}
func TestCommitStringParsing(t *testing.T) {
dataFirstPart := "* DATA:|4e61bacab44e9b4730e44a6615d04098dd3a8eaf|Tue, 20 Dec 2016 21:10:41 +0100|4e61bac|"
tests := []struct {
shouldPass bool
testName string
commitMessage string
}{
{true, "normal", "not a fancy message"},
{true, "extra pipe", "An extra pipe: |"},
{true, "extra 'Data:'", "DATA: might be trouble"},
}
for _, test := range tests {
t.Run(test.testName, func(t *testing.T) {
testString := fmt.Sprintf("%s%s", dataFirstPart, test.commitMessage)
idx := strings.Index(testString, "DATA:")
commit, err := NewCommit(0, 0, []byte(testString[idx+5:]))
if err != nil && test.shouldPass {
t.Errorf("Could not parse %s", testString)
return
}
if test.commitMessage != commit.Subject {
t.Errorf("%s does not match %s", test.commitMessage, commit.Subject)
}
})
}
}
var testglyphs = `*
*
*
*
*
*
*
*
|\
* |
* |
* |
* |
* |
| *
* |
| *
| |\
* | |
| | *
| | |\
* | | \
|\ \ \ \
| * | | |
| |\| | |
* | | | |
|/ / / /
| | | *
| * | |
| * | |
| * | |
* | | |
* | | |
* | | |
* | | |
* | | |
|\ \ \ \
| | * | |
| | |\| |
| | | * |
| | | | *
* | | | |
* | | | |
* | | | |
* | | | |
* | | | |
|\ \ \ \ \
| * | | | |
|/| | | | |
| | |/ / /
| |/| | |
| | | | *
| * | | |
|/| | | |
| * | | |
|/| | | |
| | |/ /
| |/| |
| * | |
| * | |
| |\ \ \
| | * | |
| |/| | |
| | | |/
| | |/|
| * | |
| * | |
| * | |
| | * |
| | |\ \
| | | * |
| | |/| |
| | | * |
| | | |\ \
| | | | * |
| | | |/| |
| | * | | |
| | * | | |
| | |\ \ \ \
| | | * | | |
| | |/| | | |
| | | | | * |
| | | | |/ /
* | | | / /
|/ / / / /
* | | | |
|\ \ \ \ \
| * | | | |
|/| | | | |
| * | | | |
| * | | | |
| |\ \ \ \ \
| | | * \ \ \
| | | |\ \ \ \
| | | | * | | |
| | | |/| | | |
| | | | | |/ /
| | | | |/| |
* | | | | | |
* | | | | | |
* | | | | | |
| | | | * | |
* | | | | | |
| | * | | | |
| |/| | | | |
* | | | | | |
| |/ / / / /
|/| | | | |
| | | | * |
| | | |/ /
| | |/| |
| * | | |
| | | | *
| | * | |
| | |\ \ \
| | | * | |
| | |/| | |
| | | |/ /
| | | * |
| | * | |
| | |\ \ \
| | | * | |
| | |/| | |
| | | |/ /
| | | * |
* | | | |
|\ \ \ \ \
| * \ \ \ \
| |\ \ \ \ \
| | | |/ / /
| | |/| | |
| | | | * |
| | | | * |
* | | | | |
* | | | | |
|/ / / / /
| | | * |
* | | | |
* | | | |
* | | | |
* | | | |
|\ \ \ \ \
| * | | | |
|/| | | | |
| | * | | |
| | |\ \ \ \
| | | * | | |
| | |/| | | |
| |/| | |/ /
| | | |/| |
| | | | | *
| |_|_|_|/
|/| | | |
| | * | |
| |/ / /
* | | |
* | | |
| | * |
* | | |
* | | |
| * | |
| | * |
| * | |
* | | |
|\ \ \ \
| * | | |
|/| | | |
| |/ / /
| * | |
| |\ \ \
| | * | |
| |/| | |
| | |/ /
| | * |
| | |\ \
| | | * |
| | |/| |
* | | | |
* | | | |
|\ \ \ \ \
| * | | | |
|/| | | | |
| | * | | |
| | * | | |
| | * | | |
| |/ / / /
| * | | |
| |\ \ \ \
| | * | | |
| |/| | | |
* | | | | |
* | | | | |
* | | | | |
* | | | | |
* | | | | |
| | | | * |
* | | | | |
|\ \ \ \ \ \
| * | | | | |
|/| | | | | |
| | | | | * |
| | | | |/ /
* | | | | |
|\ \ \ \ \ \
* | | | | | |
* | | | | | |
| | | | * | |
* | | | | | |
* | | | | | |
|\ \ \ \ \ \ \
| | |_|_|/ / /
| |/| | | | |
| | | | * | |
| | | | * | |
| | | | * | |
| | | | * | |
| | | | * | |
| | | | * | |
| | | |/ / /
| | | * | |
| | | * | |
| | | * | |
| | |/| | |
| | | * | |
| | |/| | |
| | | |/ /
| | * | |
| |/| | |
| | | * |
| | |/ /
| | * |
| * | |
| |\ \ \
| * | | |
| | * | |
| |/| | |
| | |/ /
| | * |
| | |\ \
| | * | |
* | | | |
|\| | | |
| * | | |
| * | | |
| * | | |
| | * | |
| * | | |
| |\| | |
| * | | |
| | * | |
| | * | |
| * | | |
| * | | |
| * | | |
| * | | |
| * | | |
| * | | |
| * | | |
| * | | |
| | * | |
| * | | |
| * | | |
| * | | |
| * | | |
| | * | |
* | | | |
|\| | | |
| | * | |
| * | | |
| |\| | |
| | * | |
| | * | |
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`

View file

@ -1,336 +0,0 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package gitgraph
import (
"bytes"
"fmt"
)
// Parser represents a git graph parser. It is stateful containing the previous
// glyphs, detected flows and color assignments.
type Parser struct {
glyphs []byte
oldGlyphs []byte
flows []int64
oldFlows []int64
maxFlow int64
colors []int
oldColors []int
availableColors []int
nextAvailable int
firstInUse int
firstAvailable int
maxAllowedColors int
}
// Reset resets the internal parser state.
func (parser *Parser) Reset() {
parser.glyphs = parser.glyphs[0:0]
parser.oldGlyphs = parser.oldGlyphs[0:0]
parser.flows = parser.flows[0:0]
parser.oldFlows = parser.oldFlows[0:0]
parser.maxFlow = 0
parser.colors = parser.colors[0:0]
parser.oldColors = parser.oldColors[0:0]
parser.availableColors = parser.availableColors[0:0]
parser.availableColors = append(parser.availableColors, 1, 2)
parser.nextAvailable = 0
parser.firstInUse = -1
parser.firstAvailable = 0
parser.maxAllowedColors = 0
}
// AddLineToGraph adds the line as a row to the graph
func (parser *Parser) AddLineToGraph(graph *Graph, row int, line []byte) error {
idx := bytes.Index(line, []byte("DATA:"))
if idx < 0 {
parser.ParseGlyphs(line)
} else {
parser.ParseGlyphs(line[:idx])
}
var err error
commitDone := false
for column, glyph := range parser.glyphs {
if glyph == ' ' {
continue
}
flowID := parser.flows[column]
graph.AddGlyph(row, column, flowID, parser.colors[column], glyph)
if glyph == '*' {
if commitDone {
if err != nil {
err = fmt.Errorf("double commit on line %d: %s. %w", row, string(line), err)
} else {
err = fmt.Errorf("double commit on line %d: %s", row, string(line))
}
}
commitDone = true
if idx < 0 {
if err != nil {
err = fmt.Errorf("missing data section on line %d with commit: %s. %w", row, string(line), err)
} else {
err = fmt.Errorf("missing data section on line %d with commit: %s", row, string(line))
}
continue
}
err2 := graph.AddCommit(row, column, flowID, line[idx+5:])
if err != nil && err2 != nil {
err = fmt.Errorf("%v %w", err2, err)
continue
} else if err2 != nil {
err = err2
continue
}
}
}
if !commitDone {
graph.Commits = append(graph.Commits, RelationCommit)
}
return err
}
func (parser *Parser) releaseUnusedColors() {
if parser.firstInUse > -1 {
// Here we step through the old colors, searching for them in the
// "in-use" section of availableColors (that is, the colors between
// firstInUse and firstAvailable)
// Ensure that the benchmarks are not worsened with proposed changes
stepstaken := 0
position := parser.firstInUse
for _, color := range parser.oldColors {
if color == 0 {
continue
}
found := false
i := position
for j := stepstaken; i != parser.firstAvailable && j < len(parser.availableColors); j++ {
colorToCheck := parser.availableColors[i]
if colorToCheck == color {
found = true
break
}
i = (i + 1) % len(parser.availableColors)
}
if !found {
// Duplicate color
continue
}
// Swap them around
parser.availableColors[position], parser.availableColors[i] = parser.availableColors[i], parser.availableColors[position]
stepstaken++
position = (parser.firstInUse + stepstaken) % len(parser.availableColors)
if position == parser.firstAvailable || stepstaken == len(parser.availableColors) {
break
}
}
if stepstaken == len(parser.availableColors) {
parser.firstAvailable = -1
} else {
parser.firstAvailable = position
if parser.nextAvailable == -1 {
parser.nextAvailable = parser.firstAvailable
}
}
}
}
// ParseGlyphs parses the provided glyphs and sets the internal state
func (parser *Parser) ParseGlyphs(glyphs []byte) {
// Clean state for parsing this row
parser.glyphs, parser.oldGlyphs = parser.oldGlyphs, parser.glyphs
parser.glyphs = parser.glyphs[0:0]
parser.flows, parser.oldFlows = parser.oldFlows, parser.flows
parser.flows = parser.flows[0:0]
parser.colors, parser.oldColors = parser.oldColors, parser.colors
// Ensure we have enough flows and colors
parser.colors = parser.colors[0:0]
for range glyphs {
parser.flows = append(parser.flows, 0)
parser.colors = append(parser.colors, 0)
}
// Copy the provided glyphs in to state.glyphs for safekeeping
parser.glyphs = append(parser.glyphs, glyphs...)
// release unused colors
parser.releaseUnusedColors()
for i := len(glyphs) - 1; i >= 0; i-- {
glyph := glyphs[i]
switch glyph {
case '|':
fallthrough
case '*':
parser.setUpFlow(i)
case '/':
parser.setOutFlow(i)
case '\\':
parser.setInFlow(i)
case '_':
parser.setRightFlow(i)
case '.':
fallthrough
case '-':
parser.setLeftFlow(i)
case ' ':
// no-op
default:
parser.newFlow(i)
}
}
}
func (parser *Parser) takePreviousFlow(i, j int) {
if j < len(parser.oldFlows) && parser.oldFlows[j] > 0 {
parser.flows[i] = parser.oldFlows[j]
parser.oldFlows[j] = 0
parser.colors[i] = parser.oldColors[j]
parser.oldColors[j] = 0
} else {
parser.newFlow(i)
}
}
func (parser *Parser) takeCurrentFlow(i, j int) {
if j < len(parser.flows) && parser.flows[j] > 0 {
parser.flows[i] = parser.flows[j]
parser.colors[i] = parser.colors[j]
} else {
parser.newFlow(i)
}
}
func (parser *Parser) newFlow(i int) {
parser.maxFlow++
parser.flows[i] = parser.maxFlow
// Now give this flow a color
if parser.nextAvailable == -1 {
next := len(parser.availableColors)
if parser.maxAllowedColors < 1 || next < parser.maxAllowedColors {
parser.nextAvailable = next
parser.firstAvailable = next
parser.availableColors = append(parser.availableColors, next+1)
}
}
parser.colors[i] = parser.availableColors[parser.nextAvailable]
if parser.firstInUse == -1 {
parser.firstInUse = parser.nextAvailable
}
parser.availableColors[parser.firstAvailable], parser.availableColors[parser.nextAvailable] = parser.availableColors[parser.nextAvailable], parser.availableColors[parser.firstAvailable]
parser.nextAvailable = (parser.nextAvailable + 1) % len(parser.availableColors)
parser.firstAvailable = (parser.firstAvailable + 1) % len(parser.availableColors)
if parser.nextAvailable == parser.firstInUse {
parser.nextAvailable = parser.firstAvailable
}
if parser.nextAvailable == parser.firstInUse {
parser.nextAvailable = -1
parser.firstAvailable = -1
}
}
// setUpFlow handles '|' or '*'
func (parser *Parser) setUpFlow(i int) {
// In preference order:
//
// Previous Row: '\? ' ' |' ' /'
// Current Row: ' | ' ' |' ' | '
if i > 0 && i-1 < len(parser.oldGlyphs) && parser.oldGlyphs[i-1] == '\\' {
parser.takePreviousFlow(i, i-1)
} else if i < len(parser.oldGlyphs) && (parser.oldGlyphs[i] == '|' || parser.oldGlyphs[i] == '*') {
parser.takePreviousFlow(i, i)
} else if i+1 < len(parser.oldGlyphs) && parser.oldGlyphs[i+1] == '/' {
parser.takePreviousFlow(i, i+1)
} else {
parser.newFlow(i)
}
}
// setOutFlow handles '/'
func (parser *Parser) setOutFlow(i int) {
// In preference order:
//
// Previous Row: ' |/' ' |_' ' |' ' /' ' _' '\'
// Current Row: '/| ' '/| ' '/ ' '/ ' '/ ' '/'
if i+2 < len(parser.oldGlyphs) &&
(parser.oldGlyphs[i+1] == '|' || parser.oldGlyphs[i+1] == '*') &&
(parser.oldGlyphs[i+2] == '/' || parser.oldGlyphs[i+2] == '_') &&
i+1 < len(parser.glyphs) &&
(parser.glyphs[i+1] == '|' || parser.glyphs[i+1] == '*') {
parser.takePreviousFlow(i, i+2)
} else if i+1 < len(parser.oldGlyphs) &&
(parser.oldGlyphs[i+1] == '|' || parser.oldGlyphs[i+1] == '*' ||
parser.oldGlyphs[i+1] == '/' || parser.oldGlyphs[i+1] == '_') {
parser.takePreviousFlow(i, i+1)
if parser.oldGlyphs[i+1] == '/' {
parser.glyphs[i] = '|'
}
} else if i < len(parser.oldGlyphs) && parser.oldGlyphs[i] == '\\' {
parser.takePreviousFlow(i, i)
} else {
parser.newFlow(i)
}
}
// setInFlow handles '\'
func (parser *Parser) setInFlow(i int) {
// In preference order:
//
// Previous Row: '| ' '-. ' '| ' '\ ' '/' '---'
// Current Row: '|\' ' \' ' \' ' \' '\' ' \ '
if i > 0 && i-1 < len(parser.oldGlyphs) &&
(parser.oldGlyphs[i-1] == '|' || parser.oldGlyphs[i-1] == '*') &&
(parser.glyphs[i-1] == '|' || parser.glyphs[i-1] == '*') {
parser.newFlow(i)
} else if i > 0 && i-1 < len(parser.oldGlyphs) &&
(parser.oldGlyphs[i-1] == '|' || parser.oldGlyphs[i-1] == '*' ||
parser.oldGlyphs[i-1] == '.' || parser.oldGlyphs[i-1] == '\\') {
parser.takePreviousFlow(i, i-1)
if parser.oldGlyphs[i-1] == '\\' {
parser.glyphs[i] = '|'
}
} else if i < len(parser.oldGlyphs) && parser.oldGlyphs[i] == '/' {
parser.takePreviousFlow(i, i)
} else {
parser.newFlow(i)
}
}
// setRightFlow handles '_'
func (parser *Parser) setRightFlow(i int) {
// In preference order:
//
// Current Row: '__' '_/' '_|_' '_|/'
if i+1 < len(parser.glyphs) &&
(parser.glyphs[i+1] == '_' || parser.glyphs[i+1] == '/') {
parser.takeCurrentFlow(i, i+1)
} else if i+2 < len(parser.glyphs) &&
(parser.glyphs[i+1] == '|' || parser.glyphs[i+1] == '*') &&
(parser.glyphs[i+2] == '_' || parser.glyphs[i+2] == '/') {
parser.takeCurrentFlow(i, i+2)
} else {
parser.newFlow(i)
}
}
// setLeftFlow handles '----.'
func (parser *Parser) setLeftFlow(i int) {
if parser.glyphs[i] == '.' {
parser.newFlow(i)
} else if i+1 < len(parser.glyphs) &&
(parser.glyphs[i+1] == '-' || parser.glyphs[i+1] == '.') {
parser.takeCurrentFlow(i, i+1)
} else {
parser.newFlow(i)
}
}