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|
package main
import (
"database/sql"
"errors"
"fmt"
"html/template"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"time"
)
const pullSchema = `
create table if not exists pulls (
id integer primary key,
repo integer not null references repos(id) on delete cascade,
number integer not null,
author integer not null references users(id) on delete cascade,
title text not null,
body text not null default '',
source_repo integer not null,
source_branch text not null,
target_branch text not null,
state text not null default 'open',
created integer not null,
updated integer not null,
merged text not null default '',
unique(repo, number)
);
create table if not exists reviews (
id integer primary key,
pull integer not null references pulls(id) on delete cascade,
author integer not null references users(id) on delete cascade,
path text not null,
side text not null,
line integer not null,
body text not null,
resolved integer not null default 0,
created integer not null
);
create table if not exists comments (
id integer primary key,
pull integer not null references pulls(id) on delete cascade,
author integer not null references users(id) on delete cascade,
body text not null,
created integer not null
);
`
type Pull struct {
ID int64
Number int64
Repo Repo
Author User
Title string
Body string
SourceRepo Repo
SourceBranch string
TargetBranch string
State string
Created time.Time
Updated time.Time
Merged string
Comments int
}
type Review struct {
ID int64
Author User
Path string
Side string
Line int
Body string
Resolved bool
Created time.Time
HTML template.HTML
URL string
CanEdit bool
}
func (r Review) Key() string {
return fmt.Sprintf("%s:%s:%d", r.Path, r.Side, r.Line)
}
type Comment struct {
ID int64
Author User
Body string
Created time.Time
}
func (p Pull) Ref() string {
return fmt.Sprintf("refs/pull/%d/head", p.Number)
}
func (p Pull) SameRepo() bool {
return p.SourceRepo.ID == p.Repo.ID
}
func (s *Store) CreatePull(repo Repo, author User, title, body string, source Repo, sourceBranch, targetBranch string) (Pull, error) {
title = strings.TrimSpace(title)
if title == "" || len(title) > 200 {
return Pull{}, errors.New("Title is required and at most 200 characters")
}
now := time.Now().Unix()
var number int64
tx, err := s.db.Begin()
if err != nil {
return Pull{}, err
}
defer tx.Rollback()
tx.QueryRow(`select coalesce(max(number), 0) + 1 from pulls where repo = ?`, repo.ID).Scan(&number)
res, err := tx.Exec(`insert into pulls(repo, number, author, title, body, source_repo, source_branch, target_branch, state, created, updated) values (?, ?, ?, ?, ?, ?, ?, ?, 'open', ?, ?)`,
repo.ID, number, author.ID, title, body, source.ID, sourceBranch, targetBranch, now, now)
if err != nil {
return Pull{}, err
}
if err := tx.Commit(); err != nil {
return Pull{}, err
}
id, _ := res.LastInsertId()
return Pull{ID: id, Number: number, Repo: repo, Author: author, Title: title, Body: body, SourceRepo: source, SourceBranch: sourceBranch, TargetBranch: targetBranch, State: "open"}, nil
}
func (s *Store) scanPulls(rows *sql.Rows) ([]Pull, error) {
defer rows.Close()
var pulls []Pull
for rows.Next() {
var p Pull
var created, updated, aCreated int64
var sourceID int64
if err := rows.Scan(&p.ID, &p.Number, &p.Title, &p.Body, &sourceID, &p.SourceBranch, &p.TargetBranch, &p.State, &created, &updated, &p.Merged, &p.Comments, &p.Author.ID, &p.Author.Name, &aCreated); err != nil {
return nil, err
}
p.Created, p.Updated, p.Author.Created = time.Unix(created, 0), time.Unix(updated, 0), time.Unix(aCreated, 0)
p.SourceRepo.ID = sourceID
pulls = append(pulls, p)
}
return pulls, rows.Err()
}
const pullColumns = `p.id, p.number, p.title, p.body, p.source_repo, p.source_branch, p.target_branch, p.state, p.created, p.updated, p.merged,
(select count(*) from comments c where c.pull = p.id), u.id, u.name, u.created from pulls p join users u on u.id = p.author`
func (s *Store) Pulls(repo Repo, state string) ([]Pull, error) {
rows, err := s.db.Query(`select `+pullColumns+` where p.repo = ? and (? = '' or p.state = ?) order by p.number desc`, repo.ID, state, state)
if err != nil {
return nil, err
}
pulls, err := s.scanPulls(rows)
for i := range pulls {
pulls[i].Repo = repo
s.fillSource(&pulls[i])
}
return pulls, err
}
func (s *Store) Pull(repo Repo, number int64) (Pull, error) {
rows, err := s.db.Query(`select `+pullColumns+` where p.repo = ? and p.number = ?`, repo.ID, number)
if err != nil {
return Pull{}, err
}
pulls, err := s.scanPulls(rows)
if err != nil || len(pulls) == 0 {
return Pull{}, ErrNotFound
}
p := pulls[0]
p.Repo = repo
s.fillSource(&p)
return p, nil
}
func (s *Store) fillSource(p *Pull) {
if p.SourceRepo.ID == p.Repo.ID {
p.SourceRepo = p.Repo
return
}
rows, err := s.db.Query(`select `+repoColumns+` where r.id = ?`, p.SourceRepo.ID)
if err != nil {
return
}
if repos, _ := scanRepos(rows); len(repos) == 1 {
p.SourceRepo = repos[0]
}
}
func (s *Store) SetPullState(id int64, state, merged string) error {
_, err := s.db.Exec(`update pulls set state = ?, merged = ?, updated = ? where id = ?`, state, merged, time.Now().Unix(), id)
return err
}
func (s *Store) TouchPull(id int64) {
s.db.Exec(`update pulls set updated = ? where id = ?`, time.Now().Unix(), id)
}
func (s *Store) AddComment(pull int64, author User, body string) error {
body = strings.TrimSpace(body)
if body == "" || len(body) > 20000 {
return errors.New("Comment is empty or too long")
}
_, err := s.db.Exec(`insert into comments(pull, author, body, created) values (?, ?, ?, ?)`, pull, author.ID, body, time.Now().Unix())
s.TouchPull(pull)
return err
}
func (s *Store) AddReview(pull int64, author User, path, side string, line int, body string) error {
body = strings.TrimSpace(body)
if body == "" || len(body) > 20000 {
return errors.New("Comment is empty or too long")
}
if side != "n" && side != "o" || line <= 0 || path == "" {
return errors.New("Bad line reference")
}
_, err := s.db.Exec(`insert into reviews(pull, author, path, side, line, body, created) values (?, ?, ?, ?, ?, ?, ?)`, pull, author.ID, path, side, line, body, time.Now().Unix())
s.TouchPull(pull)
return err
}
func (s *Store) Reviews(pull int64) ([]Review, error) {
rows, err := s.db.Query(`select r.id, r.path, r.side, r.line, r.body, r.resolved, r.created, u.id, u.name, u.created from reviews r join users u on u.id = r.author where r.pull = ? order by r.id`, pull)
if err != nil {
return nil, err
}
defer rows.Close()
var out []Review
for rows.Next() {
var r Review
var resolved int
var created, uCreated int64
if err := rows.Scan(&r.ID, &r.Path, &r.Side, &r.Line, &r.Body, &resolved, &created, &r.Author.ID, &r.Author.Name, &uCreated); err != nil {
return nil, err
}
r.Resolved = resolved != 0
r.Created, r.Author.Created = time.Unix(created, 0), time.Unix(uCreated, 0)
out = append(out, r)
}
return out, rows.Err()
}
func (s *Store) ReviewAuthor(id int64) int64 {
var author int64
s.db.QueryRow(`select author from reviews where id = ?`, id).Scan(&author)
return author
}
func (s *Store) ResolveReview(id int64, resolved bool) {
s.db.Exec(`update reviews set resolved = ? where id = ?`, resolved, id)
}
func (s *Store) DeleteReview(id int64) {
s.db.Exec(`delete from reviews where id = ?`, id)
}
func (s *Store) Comments(pull int64) ([]Comment, error) {
rows, err := s.db.Query(`select c.id, c.body, c.created, u.id, u.name, u.created from comments c join users u on u.id = c.author where c.pull = ? order by c.id`, pull)
if err != nil {
return nil, err
}
defer rows.Close()
var out []Comment
for rows.Next() {
var c Comment
var created, uCreated int64
if err := rows.Scan(&c.ID, &c.Body, &created, &c.Author.ID, &c.Author.Name, &uCreated); err != nil {
return nil, err
}
c.Created, c.Author.Created = time.Unix(created, 0), time.Unix(uCreated, 0)
out = append(out, c)
}
return out, rows.Err()
}
func (s *Store) OpenPullCount(repo int64) int {
var n int
s.db.QueryRow(`select count(*) from pulls where repo = ? and state = 'open'`, repo).Scan(&n)
return n
}
func (s *Store) Forks(parent int64, viewer int64) ([]Repo, error) {
rows, err := s.db.Query(`select `+repoColumns+` where r.parent = ? and (r.private = 0 or r.owner = ?) order by u.name`, parent, viewer)
if err != nil {
return nil, err
}
return scanRepos(rows)
}
func (s *Store) ForkRepo(owner User, parent Repo) (Repo, error) {
name := parent.Name
repo, err := s.CreateRepo(owner, name, parent.Description, Public, strings.Join(parent.Tags, ","))
if err != nil {
return Repo{}, err
}
s.db.Exec(`update repos set parent = ? where id = ?`, parent.ID, repo.ID)
repo.Parent = parent.ID
return repo, nil
}
func (s *Server) pullAccess(w http.ResponseWriter, r *http.Request, repo Repo) (repoPage, Git, *User, bool) {
rp, g, err := s.repoPage(r, repo, "")
if err != nil {
s.fail(w, r, 404, "No such ref")
return rp, g, nil, false
}
rp.Tab = "pulls"
return rp, g, s.current(r), true
}
func (s *Server) pulls(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, _, _, ok := s.pullAccess(w, r, repo)
if !ok {
return
}
state := r.URL.Query().Get("state")
if state == "" {
state = "open"
}
if state == "all" {
state = ""
}
pulls, err := s.store.Pulls(repo, state)
if err != nil {
s.fail(w, r, 500, err.Error())
return
}
s.render(w, r, "pulls", page{Title: repo.Path() + " pull requests", Data: map[string]any{"Page": rp, "Pulls": pulls, "State": r.URL.Query().Get("state")}})
}
type sourceOption struct {
Value string
Label string
}
func (s *Server) pullSources(repo Repo, user *User) []sourceOption {
var opts []sourceOption
add := func(src Repo) {
g := Git{Dir: s.repoDir(src)}
branches, _ := g.Refs("refs/heads")
for _, b := range branches {
label := b.Name
if src.ID != repo.ID {
label = src.Path() + ":" + b.Name
}
opts = append(opts, sourceOption{Value: src.Path() + ":" + b.Name, Label: label})
}
}
add(repo)
if user != nil {
forks, _ := s.store.Forks(repo.ID, user.ID)
for _, f := range forks {
if s.store.CanWrite(f, user) {
add(f)
}
}
}
return opts
}
func (s *Server) newPull(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, g, user, ok := s.pullAccess(w, r, repo)
if !ok {
return
}
if user == nil {
http.Redirect(w, r, "/login", http.StatusSeeOther)
return
}
branches, _ := g.Refs("refs/heads")
s.render(w, r, "newpull", page{Title: "New pull request", User: user, Error: r.URL.Query().Get("error"),
Data: map[string]any{"Page": rp, "Sources": s.pullSources(repo, user), "Branches": branches, "Source": r.URL.Query().Get("source"), "Target": r.URL.Query().Get("target")}})
}
func (s *Server) resolveSource(repo Repo, user *User, value string) (Repo, string, error) {
path, branch, ok := strings.Cut(value, ":")
if !ok || branch == "" {
return Repo{}, "", errors.New("Choose a source branch")
}
owner, name, ok := strings.Cut(strings.TrimPrefix(path, "~"), "/")
if !ok {
return Repo{}, "", errors.New("Choose a source branch")
}
src, err := s.store.RepoByPath(owner, name)
if err != nil {
return Repo{}, "", errors.New("No such source repository")
}
if src.ID != repo.ID && (src.Parent != repo.ID || !s.store.CanWrite(src, user)) {
return Repo{}, "", errors.New("Source must be this repository or your own fork of it")
}
if _, err := (Git{Dir: s.repoDir(src)}).Resolve("refs/heads/" + branch); err != nil {
return Repo{}, "", errors.New("No such source branch")
}
return src, branch, nil
}
func (s *Server) createPull(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, g, user, ok := s.pullAccess(w, r, repo)
if !ok {
return
}
if user == nil {
http.Redirect(w, r, "/login", http.StatusSeeOther)
return
}
retry := func(msg string) {
branches, _ := g.Refs("refs/heads")
w.WriteHeader(400)
s.render(w, r, "newpull", page{Title: "New pull request", User: user, Error: msg,
Data: map[string]any{"Page": rp, "Sources": s.pullSources(repo, user), "Branches": branches, "Source": r.FormValue("source"), "Target": r.FormValue("target"), "PullTitle": r.FormValue("title"), "Body": r.FormValue("body")}})
}
if repo.Archived {
retry("This repository is archived")
return
}
src, branch, err := s.resolveSource(repo, user, r.FormValue("source"))
if err != nil {
retry(err.Error())
return
}
target := r.FormValue("target")
if _, err := g.Resolve("refs/heads/" + target); err != nil {
retry("No such target branch")
return
}
if src.ID == repo.ID && branch == target {
retry("Source and target are the same branch")
return
}
pull, err := s.store.CreatePull(repo, *user, r.FormValue("title"), strings.TrimSpace(r.FormValue("body")), src, branch, target)
if err != nil {
retry(err.Error())
return
}
if err := g.Fetch(s.repoDir(src), "refs/heads/"+branch, pull.Ref()); err != nil {
retry("Could not fetch the source branch: " + err.Error())
return
}
url := fmt.Sprintf("https://%s/%s/pulls/%d", s.host, repo.Path(), pull.Number)
if repo.Owner.ID != user.ID {
s.notify(s.store.VerifiedEmail(repo.Owner.ID), fmt.Sprintf("[%s] pull request #%d: %s", repo.Path(), pull.Number, pull.Title),
fmt.Sprintf("~%s opened a pull request on %s.\n\n%s\n\n%s\n", user.Name, repo.Path(), pull.Body, url))
}
http.Redirect(w, r, fmt.Sprintf("/%s/pulls/%d", repo.Path(), pull.Number), http.StatusSeeOther)
}
func (s *Server) loadPull(w http.ResponseWriter, r *http.Request, repo Repo, rest string) (repoPage, Git, *User, Pull, string, bool) {
rp, g, user, ok := s.pullAccess(w, r, repo)
if !ok {
return rp, g, user, Pull{}, "", false
}
numStr, action, _ := strings.Cut(rest, "/")
number, err := strconv.ParseInt(numStr, 10, 64)
if err != nil {
s.fail(w, r, 404, "No such pull request")
return rp, g, user, Pull{}, "", false
}
pull, err := s.store.Pull(repo, number)
if err != nil {
s.fail(w, r, 404, "No such pull request")
return rp, g, user, Pull{}, "", false
}
return rp, g, user, pull, action, true
}
func (s *Server) pull(w http.ResponseWriter, r *http.Request, repo Repo, rest string) {
rp, g, user, pull, action, ok := s.loadPull(w, r, repo, rest)
if !ok {
return
}
isOwner := s.store.CanWrite(repo, user)
isAuthor := user != nil && user.ID == pull.Author.ID
if r.Method == "POST" {
if user == nil {
http.Redirect(w, r, "/login", http.StatusSeeOther)
return
}
back := fmt.Sprintf("/%s/pulls/%d", repo.Path(), pull.Number)
switch action {
case "comment":
if err := s.store.AddComment(pull.ID, *user, r.FormValue("body")); err != nil {
http.Redirect(w, r, back+"?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
s.notifyPull(pull, *user, "commented on", r.FormValue("body"))
case "close":
if (isOwner || isAuthor) && pull.State == "open" {
s.store.SetPullState(pull.ID, "closed", "")
}
case "reopen":
if (isOwner || isAuthor) && pull.State == "closed" {
s.store.SetPullState(pull.ID, "open", "")
}
case "review":
line, _ := strconv.Atoi(r.FormValue("line"))
if err := s.store.AddReview(pull.ID, *user, r.FormValue("path"), r.FormValue("side"), line, r.FormValue("body")); err != nil {
http.Redirect(w, r, back+"?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
back += "#r-" + r.FormValue("path") + ":" + r.FormValue("side") + ":" + r.FormValue("line")
s.notifyPull(pull, *user, "reviewed "+r.FormValue("path")+" line "+r.FormValue("line")+" on", r.FormValue("body"))
case "resolve", "unresolve", "delete":
id, _ := strconv.ParseInt(r.FormValue("review"), 10, 64)
owner := s.store.ReviewAuthor(id)
if owner == 0 || (owner != user.ID && !isOwner) {
s.fail(w, r, 403, "Not your comment")
return
}
switch action {
case "resolve":
s.store.ResolveReview(id, true)
case "unresolve":
s.store.ResolveReview(id, false)
case "delete":
s.store.DeleteReview(id)
}
back += "#diff"
case "update":
if (isOwner || isAuthor) && pull.State == "open" {
if err := g.Fetch(s.repoDir(pull.SourceRepo), "refs/heads/"+pull.SourceBranch, pull.Ref()); err != nil {
http.Redirect(w, r, back+"?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
s.store.TouchPull(pull.ID)
}
case "merge":
if !isOwner || pull.State != "open" {
s.fail(w, r, 403, "Only the repository owner can merge")
return
}
title := strings.TrimSpace(r.FormValue("title"))
if title == "" {
title = mergeTitle(pull)
}
message := title
if body := strings.TrimSpace(r.FormValue("body")); body != "" {
message += "\n\n" + body
}
var hash string
var err error
switch r.FormValue("strategy") {
case "squash":
hash, err = g.Squash(pull.TargetBranch, pull.Ref(), message, pull.Author.Name, pull.Author.Name+"@"+s.host, user.Name, user.Name+"@"+s.host)
case "rebase":
hash, err = g.Rebase(pull.TargetBranch, pull.Ref(), user.Name, user.Name+"@"+s.host)
default:
hash, err = g.Merge(pull.TargetBranch, pull.Ref(), message, user.Name, user.Name+"@"+s.host)
}
if err != nil {
http.Redirect(w, r, back+"?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
s.store.SetPullState(pull.ID, "merged", hash)
s.notifyPull(pull, *user, "merged", "")
default:
s.fail(w, r, 404, "Page not found")
return
}
http.Redirect(w, r, back, http.StatusSeeOther)
return
}
head, err := g.Resolve(pull.Ref())
if err != nil {
s.fail(w, r, 500, "Pull request head is missing")
return
}
data := map[string]any{"Page": rp, "Pull": pull, "Head": head, "Owner": isOwner, "Author": isAuthor,
"Body": s.renderMarkdown([]byte(pull.Body))}
base := pull.TargetBranch
if pull.State == "merged" && pull.Merged != "" {
base = pull.Merged + "^1"
}
if mb, err := g.MergeBase(base, head); err == nil {
data["Base"] = mb
commits, _ := g.LogRange(mb, head, 200)
data["Commits"] = commits
files, _ := g.DiffRange(mb, head)
data["Files"] = files
reviews, _ := s.store.Reviews(pull.ID)
present := map[string]bool{}
for _, f := range files {
for _, h := range f.Hunks {
for _, l := range h.Lines {
switch l.Kind {
case "add", "ctx":
present[fmt.Sprintf("%s:n:%d", f.New, l.New)] = true
}
if l.Kind == "del" || l.Kind == "ctx" {
present[fmt.Sprintf("%s:o:%d", f.New, l.Old)] = true
}
}
}
}
inline := map[string][]Review{}
var outdated []Review
for _, rv := range reviews {
rv.HTML = s.renderMarkdown([]byte(rv.Body))
rv.URL = fmt.Sprintf("/%s/pulls/%d", repo.Path(), pull.Number)
rv.CanEdit = user != nil && (user.ID == rv.Author.ID || isOwner)
if present[rv.Key()] {
inline[rv.Key()] = append(inline[rv.Key()], rv)
} else {
outdated = append(outdated, rv)
}
}
data["Inline"] = inline
data["Outdated"] = outdated
data["ReviewCount"] = len(reviews)
data["CommentAt"] = r.URL.Query().Get("comment")
added, removed := 0, 0
for _, f := range files {
added += f.Added
removed += f.Removed
}
data["Added"], data["Removed"] = added, removed
if pull.State == "open" {
data["Mergeable"] = g.Mergeable(pull.TargetBranch, head)
if cur, err := g.Resolve("refs/heads/" + pull.TargetBranch); err == nil && cur == head {
data["Mergeable"] = false
}
if isOwner && data["Mergeable"] == true && r.URL.Query().Get("merge") == "1" {
data["Confirm"] = true
data["MergeTitle"] = mergeTitle(pull)
var subjects []string
for _, c := range data["Commits"].([]Commit) {
subjects = append(subjects, "* "+c.Subject)
}
data["SquashBody"] = strings.Join(subjects, "\n")
}
}
} else {
data["Unrelated"] = true
}
comments, _ := s.store.Comments(pull.ID)
rendered := make([]map[string]any, len(comments))
for i, c := range comments {
rendered[i] = map[string]any{"Comment": c, "Body": s.renderMarkdown([]byte(c.Body))}
}
data["Comments"] = rendered
s.render(w, r, "pull", page{Title: fmt.Sprintf("#%d %s", pull.Number, pull.Title), Error: r.URL.Query().Get("error"), Math: hasMath(data["Body"]), Data: data})
}
func (s *Server) notifyPull(pull Pull, actor User, verb, body string) {
url := fmt.Sprintf("https://%s/%s/pulls/%d", s.host, pull.Repo.Path(), pull.Number)
subject := fmt.Sprintf("[%s] pull request #%d: %s", pull.Repo.Path(), pull.Number, pull.Title)
text := fmt.Sprintf("~%s %s pull request #%d.\n\n%s\n\n%s\n", actor.Name, verb, pull.Number, body, url)
seen := map[int64]bool{actor.ID: true}
for _, id := range []int64{pull.Author.ID, pull.Repo.Owner.ID} {
if !seen[id] {
seen[id] = true
s.notify(s.store.VerifiedEmail(id), subject, text)
}
}
}
func mergeTitle(pull Pull) string {
return fmt.Sprintf("Merge pull request #%d from %s", pull.Number, pull.SourceRepo.Path()+":"+pull.SourceBranch)
}
func (s *Server) fork(w http.ResponseWriter, r *http.Request, repo Repo) {
user := s.require(w, r)
if user == nil {
return
}
if user.ID == repo.Owner.ID {
http.Redirect(w, r, "/"+repo.Path(), http.StatusSeeOther)
return
}
fork, err := s.store.ForkRepo(*user, repo)
if err != nil {
s.fail(w, r, 400, err.Error())
return
}
dir := s.repoDir(fork)
if err := os.MkdirAll(filepath.Dir(dir), 0o755); err == nil {
err = cloneRepo(s.repoDir(repo), dir)
}
if err != nil {
s.store.DeleteRepo(fork.ID)
s.fail(w, r, 500, err.Error())
return
}
http.Redirect(w, r, "/"+fork.Path(), http.StatusSeeOther)
}
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