Avoid allocations by using unsafe strinng/bytes conversions
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
//
//go:build linux
package main
import (
"bytes"
"context"
"encoding/binary"
"errors"
"fmt"
"io"
"net"
"os"
"path/filepath"
"strconv"
"strings"
"syscall"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/jackc/pgx/v5"
"go.lindenii.runxiyu.org/lindenii-common/ansiec"
"go.lindenii.runxiyu.org/lindenii-common/clog"
)
var (
errGetFD = errors.New("unable to get file descriptor")
errGetUcred = errors.New("failed getsockopt")
)
// hooksHandler handles a connection from hookc via the
// unix socket.
func hooksHandler(conn net.Conn) {
var ctx context.Context
var cancel context.CancelFunc
var ucred *syscall.Ucred
var err error
var cookie []byte
var packPass packPass
var sshStderr io.Writer
var hookRet byte
defer conn.Close()
ctx, cancel = context.WithCancel(context.Background())
defer cancel()
// There aren't reasonable cases where someone would run this as
// another user.
if ucred, err = getUcred(conn); err != nil {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nUnable to get peer credentials: %v", err)
return
}
uint32uid := uint32(os.Getuid()) //#nosec G115
if ucred.Uid != uint32uid {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nUID mismatch")
return
}
cookie = make([]byte, 64)
if _, err = conn.Read(cookie); err != nil {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nFailed to read cookie: %v", err)
return
}
{
var ok bool
packPass, ok = packPasses.Load(string(cookie))
packPass, ok = packPasses.Load(bytesToString(cookie))
if !ok {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nInvalid handler cookie")
return
}
}
sshStderr = packPass.session.Stderr()
_, _ = sshStderr.Write([]byte{'\n'})
hookRet = func() byte {
var argc64 uint64
if err = binary.Read(conn, binary.NativeEndian, &argc64); err != nil {
writeRedError(sshStderr, "Failed to read argc: %v", err)
return 1
}
var args []string
for range argc64 {
var arg bytes.Buffer
for {
nextByte := make([]byte, 1)
n, err := conn.Read(nextByte)
if err != nil || n != 1 {
writeRedError(sshStderr, "Failed to read arg: %v", err)
return 1
}
if nextByte[0] == 0 {
break
}
arg.WriteByte(nextByte[0])
}
args = append(args, arg.String())
}
gitEnv := make(map[string]string)
for {
var envLine bytes.Buffer
for {
nextByte := make([]byte, 1)
n, err := conn.Read(nextByte)
if err != nil || n != 1 {
writeRedError(sshStderr, "Failed to read environment variable: %v", err)
return 1
}
if nextByte[0] == 0 {
break
}
envLine.WriteByte(nextByte[0])
}
if envLine.Len() == 0 {
break
}
kv := envLine.String()
parts := strings.SplitN(kv, "=", 2)
if len(parts) < 2 {
writeRedError(sshStderr, "Invalid environment variable line: %v", kv)
return 1
}
gitEnv[parts[0]] = parts[1]
}
var stdin bytes.Buffer
if _, err = io.Copy(&stdin, conn); err != nil {
writeRedError(conn, "Failed to read to the stdin buffer: %v", err)
}
switch filepath.Base(args[0]) {
case "pre-receive":
if packPass.directAccess {
return 0
}
allOK := true
for {
var line, oldOID, rest, newIOID, refName string
var found bool
var oldHash, newHash plumbing.Hash
var oldCommit, newCommit *object.Commit
var pushOptCount int
pushOptCount, err = strconv.Atoi(gitEnv["GIT_PUSH_OPTION_COUNT"])
if err != nil {
writeRedError(sshStderr, "Failed to parse GIT_PUSH_OPTION_COUNT: %v", err)
return 1
}
// TODO: Allow existing users (even if they are already federated or registered) to add a federated user ID... though perhaps this should be in the normal SSH interface instead of the git push interface?
// Also it'd be nice to be able to combine users or whatever
if packPass.contribReq == "federated" && packPass.userType != "federated" && packPass.userType != "registered" {
if pushOptCount == 0 {
writeRedError(sshStderr, "This repo requires contributors to be either federated or registered users. You must supply your federated user ID as a push option. For example, git push -o fedid=sr.ht:runxiyu")
return 1
}
for pushOptIndex := range pushOptCount {
pushOpt, ok := gitEnv[fmt.Sprintf("GIT_PUSH_OPTION_%d", pushOptIndex)]
if !ok {
writeRedError(sshStderr, "Failed to get push option %d", pushOptIndex)
return 1
}
if strings.HasPrefix(pushOpt, "fedid=") {
fedUserID := strings.TrimPrefix(pushOpt, "fedid=")
service, username, found := strings.Cut(fedUserID, ":")
if !found {
writeRedError(sshStderr, "Invalid federated user identifier %#v does not contain a colon", fedUserID)
return 1
}
ok, err := fedauth(ctx, packPass.userID, service, username, packPass.pubkey)
if err != nil {
writeRedError(sshStderr, "Failed to verify federated user identifier %#v: %v", fedUserID, err)
return 1
}
if !ok {
writeRedError(sshStderr, "Failed to verify federated user identifier %#v: you don't seem to be on the list", fedUserID)
return 1
}
break
}
if pushOptIndex == pushOptCount-1 {
writeRedError(sshStderr, "This repo requires contributors to be either federated or registered users. You must supply your federated user ID as a push option. For example, git push -o fedid=sr.ht:runxiyu")
return 1
}
}
}
line, err = stdin.ReadString('\n')
if errors.Is(err, io.EOF) {
break
} else if err != nil {
writeRedError(sshStderr, "Failed to read pre-receive line: %v", err)
return 1
}
line = line[:len(line)-1]
oldOID, rest, found = strings.Cut(line, " ")
if !found {
writeRedError(sshStderr, "Invalid pre-receive line: %v", line)
return 1
}
newIOID, refName, found = strings.Cut(rest, " ")
if !found {
writeRedError(sshStderr, "Invalid pre-receive line: %v", line)
return 1
}
if strings.HasPrefix(refName, "refs/heads/contrib/") {
if allZero(oldOID) { // New branch
fmt.Fprintln(sshStderr, ansiec.Blue+"POK"+ansiec.Reset, refName)
var newMRID int
if packPass.userID != 0 {
err = database.QueryRow(ctx,
"INSERT INTO merge_requests (repo_id, creator, source_ref, status) VALUES ($1, $2, $3, 'open') RETURNING id",
packPass.repoID, packPass.userID, strings.TrimPrefix(refName, "refs/heads/"),
).Scan(&newMRID)
} else {
err = database.QueryRow(ctx,
"INSERT INTO merge_requests (repo_id, source_ref, status) VALUES ($1, $2, 'open') RETURNING id",
packPass.repoID, strings.TrimPrefix(refName, "refs/heads/"),
).Scan(&newMRID)
}
if err != nil {
writeRedError(sshStderr, "Error creating merge request: %v", err)
return 1
}
mergeRequestWebURL := fmt.Sprintf("%s/contrib/%d/", genHTTPRemoteURL(packPass.groupPath, packPass.repoName), newMRID)
fmt.Fprintln(sshStderr, ansiec.Blue+"Created merge request at", mergeRequestWebURL+ansiec.Reset)
select {
case ircSendBuffered <- "PRIVMSG #chat :New merge request at " + mergeRequestWebURL:
default:
clog.Error("IRC SendQ exceeded")
}
} else { // Existing contrib branch
var existingMRUser int
var isAncestor bool
err = database.QueryRow(ctx,
"SELECT COALESCE(creator, 0) FROM merge_requests WHERE source_ref = $1 AND repo_id = $2",
strings.TrimPrefix(refName, "refs/heads/"), packPass.repoID,
).Scan(&existingMRUser)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
writeRedError(sshStderr, "No existing merge request for existing contrib branch: %v", err)
} else {
writeRedError(sshStderr, "Error querying for existing merge request: %v", err)
}
return 1
}
if existingMRUser == 0 {
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(branch belongs to unowned MR)")
continue
}
if existingMRUser != packPass.userID {
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(branch belongs another user's MR)")
continue
}
oldHash = plumbing.NewHash(oldOID)
if oldCommit, err = packPass.repo.CommitObject(oldHash); err != nil {
writeRedError(sshStderr, "Daemon failed to get old commit: %v", err)
return 1
}
// Potential BUG: I'm not sure if new_commit is guaranteed to be
// detectable as they haven't been merged into the main repo's
// objects yet. But it seems to work, and I don't think there's
// any reason for this to only work intermitently.
newHash = plumbing.NewHash(newIOID)
if newCommit, err = packPass.repo.CommitObject(newHash); err != nil {
writeRedError(sshStderr, "Daemon failed to get new commit: %v", err)
return 1
}
if isAncestor, err = oldCommit.IsAncestor(newCommit); err != nil {
writeRedError(sshStderr, "Daemon failed to check if old commit is ancestor: %v", err)
return 1
}
if !isAncestor {
// TODO: Create MR snapshot ref instead
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(force pushes are not supported yet)")
continue
}
fmt.Fprintln(sshStderr, ansiec.Blue+"POK"+ansiec.Reset, refName)
}
} else { // Non-contrib branch
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(you cannot push to branches outside of contrib/*)")
}
}
fmt.Fprintln(sshStderr)
if allOK {
fmt.Fprintln(sshStderr, "Overall "+ansiec.Green+"ACK"+ansiec.Reset+" (all checks passed)")
return 0
}
fmt.Fprintln(sshStderr, "Overall "+ansiec.Red+"NAK"+ansiec.Reset+" (one or more branches failed checks)")
return 1
default:
fmt.Fprintln(sshStderr, ansiec.Red+"Invalid hook:", args[0]+ansiec.Reset)
return 1
}
}()
fmt.Fprintln(sshStderr)
_, _ = conn.Write([]byte{hookRet})
}
func serveGitHooks(listener net.Listener) error {
for {
conn, err := listener.Accept()
if err != nil {
return err
}
go hooksHandler(conn)
}
}
func getUcred(conn net.Conn) (ucred *syscall.Ucred, err error) {
unixConn := conn.(*net.UnixConn)
var unixConnFD *os.File
if unixConnFD, err = unixConn.File(); err != nil {
return nil, errGetFD
}
defer unixConnFD.Close()
if ucred, err = syscall.GetsockoptUcred(int(unixConnFD.Fd()), syscall.SOL_SOCKET, syscall.SO_PEERCRED); err != nil {
return nil, errGetUcred
}
return ucred, nil
}
func allZero(s string) bool {
for _, r := range s {
if r != '0' {
return false
}
}
return true
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
//
//go:build !linux
package main
import (
"bytes"
"context"
"encoding/binary"
"errors"
"fmt"
"io"
"net"
"path/filepath"
"strconv"
"strings"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/jackc/pgx/v5"
"go.lindenii.runxiyu.org/lindenii-common/ansiec"
"go.lindenii.runxiyu.org/lindenii-common/clog"
)
var errGetFD = errors.New("unable to get file descriptor")
// hooksHandler handles a connection from hookc via the
// unix socket.
func hooksHandler(conn net.Conn) {
var ctx context.Context
var cancel context.CancelFunc
var err error
var cookie []byte
var packPass packPass
var sshStderr io.Writer
var hookRet byte
defer conn.Close()
ctx, cancel = context.WithCancel(context.Background())
defer cancel()
// TODO: Validate that the connection is from the right user.
cookie = make([]byte, 64)
if _, err = conn.Read(cookie); err != nil {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nFailed to read cookie: %v", err)
return
}
{
var ok bool
packPass, ok = packPasses.Load(string(cookie))
packPass, ok = packPasses.Load(bytesToString(cookie))
if !ok {
if _, err = conn.Write([]byte{1}); err != nil {
return
}
writeRedError(conn, "\nInvalid handler cookie")
return
}
}
sshStderr = packPass.session.Stderr()
_, _ = sshStderr.Write([]byte{'\n'})
hookRet = func() byte {
var argc64 uint64
if err = binary.Read(conn, binary.NativeEndian, &argc64); err != nil {
writeRedError(sshStderr, "Failed to read argc: %v", err)
return 1
}
var args []string
for range argc64 {
var arg bytes.Buffer
for {
nextByte := make([]byte, 1)
n, err := conn.Read(nextByte)
if err != nil || n != 1 {
writeRedError(sshStderr, "Failed to read arg: %v", err)
return 1
}
if nextByte[0] == 0 {
break
}
arg.WriteByte(nextByte[0])
}
args = append(args, arg.String())
}
gitEnv := make(map[string]string)
for {
var envLine bytes.Buffer
for {
nextByte := make([]byte, 1)
n, err := conn.Read(nextByte)
if err != nil || n != 1 {
writeRedError(sshStderr, "Failed to read environment variable: %v", err)
return 1
}
if nextByte[0] == 0 {
break
}
envLine.WriteByte(nextByte[0])
}
if envLine.Len() == 0 {
break
}
kv := envLine.String()
parts := strings.SplitN(kv, "=", 2)
if len(parts) < 2 {
writeRedError(sshStderr, "Invalid environment variable line: %v", kv)
return 1
}
gitEnv[parts[0]] = parts[1]
}
var stdin bytes.Buffer
if _, err = io.Copy(&stdin, conn); err != nil {
writeRedError(conn, "Failed to read to the stdin buffer: %v", err)
}
switch filepath.Base(args[0]) {
case "pre-receive":
if packPass.directAccess {
return 0
}
allOK := true
for {
var line, oldOID, rest, newIOID, refName string
var found bool
var oldHash, newHash plumbing.Hash
var oldCommit, newCommit *object.Commit
var pushOptCount int
pushOptCount, err = strconv.Atoi(gitEnv["GIT_PUSH_OPTION_COUNT"])
if err != nil {
writeRedError(sshStderr, "Failed to parse GIT_PUSH_OPTION_COUNT: %v", err)
return 1
}
// TODO: Allow existing users (even if they are already federated or registered) to add a federated user ID... though perhaps this should be in the normal SSH interface instead of the git push interface?
// Also it'd be nice to be able to combine users or whatever
if packPass.contribReq == "federated" && packPass.userType != "federated" && packPass.userType != "registered" {
if pushOptCount == 0 {
writeRedError(sshStderr, "This repo requires contributors to be either federated or registered users. You must supply your federated user ID as a push option. For example, git push -o fedid=sr.ht:runxiyu")
return 1
}
for pushOptIndex := range pushOptCount {
pushOpt, ok := gitEnv[fmt.Sprintf("GIT_PUSH_OPTION_%d", pushOptIndex)]
if !ok {
writeRedError(sshStderr, "Failed to get push option %d", pushOptIndex)
return 1
}
if strings.HasPrefix(pushOpt, "fedid=") {
fedUserID := strings.TrimPrefix(pushOpt, "fedid=")
service, username, found := strings.Cut(fedUserID, ":")
if !found {
writeRedError(sshStderr, "Invalid federated user identifier %#v does not contain a colon", fedUserID)
return 1
}
ok, err := fedauth(ctx, packPass.userID, service, username, packPass.pubkey)
if err != nil {
writeRedError(sshStderr, "Failed to verify federated user identifier %#v: %v", fedUserID, err)
return 1
}
if !ok {
writeRedError(sshStderr, "Failed to verify federated user identifier %#v: you don't seem to be on the list", fedUserID)
return 1
}
break
}
if pushOptIndex == pushOptCount-1 {
writeRedError(sshStderr, "This repo requires contributors to be either federated or registered users. You must supply your federated user ID as a push option. For example, git push -o fedid=sr.ht:runxiyu")
return 1
}
}
}
line, err = stdin.ReadString('\n')
if errors.Is(err, io.EOF) {
break
} else if err != nil {
writeRedError(sshStderr, "Failed to read pre-receive line: %v", err)
return 1
}
line = line[:len(line)-1]
oldOID, rest, found = strings.Cut(line, " ")
if !found {
writeRedError(sshStderr, "Invalid pre-receive line: %v", line)
return 1
}
newIOID, refName, found = strings.Cut(rest, " ")
if !found {
writeRedError(sshStderr, "Invalid pre-receive line: %v", line)
return 1
}
if strings.HasPrefix(refName, "refs/heads/contrib/") {
if allZero(oldOID) { // New branch
fmt.Fprintln(sshStderr, ansiec.Blue+"POK"+ansiec.Reset, refName)
var newMRID int
if packPass.userID != 0 {
err = database.QueryRow(ctx,
"INSERT INTO merge_requests (repo_id, creator, source_ref, status) VALUES ($1, $2, $3, 'open') RETURNING id",
packPass.repoID, packPass.userID, strings.TrimPrefix(refName, "refs/heads/"),
).Scan(&newMRID)
} else {
err = database.QueryRow(ctx,
"INSERT INTO merge_requests (repo_id, source_ref, status) VALUES ($1, $2, 'open') RETURNING id",
packPass.repoID, strings.TrimPrefix(refName, "refs/heads/"),
).Scan(&newMRID)
}
if err != nil {
writeRedError(sshStderr, "Error creating merge request: %v", err)
return 1
}
mergeRequestWebURL := fmt.Sprintf("%s/contrib/%d/", genHTTPRemoteURL(packPass.groupPath, packPass.repoName), newMRID)
fmt.Fprintln(sshStderr, ansiec.Blue+"Created merge request at", mergeRequestWebURL+ansiec.Reset)
select {
case ircSendBuffered <- "PRIVMSG #chat :New merge request at " + mergeRequestWebURL:
default:
clog.Error("IRC SendQ exceeded")
}
} else { // Existing contrib branch
var existingMRUser int
var isAncestor bool
err = database.QueryRow(ctx,
"SELECT COALESCE(creator, 0) FROM merge_requests WHERE source_ref = $1 AND repo_id = $2",
strings.TrimPrefix(refName, "refs/heads/"), packPass.repoID,
).Scan(&existingMRUser)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
writeRedError(sshStderr, "No existing merge request for existing contrib branch: %v", err)
} else {
writeRedError(sshStderr, "Error querying for existing merge request: %v", err)
}
return 1
}
if existingMRUser == 0 {
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(branch belongs to unowned MR)")
continue
}
if existingMRUser != packPass.userID {
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(branch belongs another user's MR)")
continue
}
oldHash = plumbing.NewHash(oldOID)
if oldCommit, err = packPass.repo.CommitObject(oldHash); err != nil {
writeRedError(sshStderr, "Daemon failed to get old commit: %v", err)
return 1
}
// Potential BUG: I'm not sure if new_commit is guaranteed to be
// detectable as they haven't been merged into the main repo's
// objects yet. But it seems to work, and I don't think there's
// any reason for this to only work intermitently.
newHash = plumbing.NewHash(newIOID)
if newCommit, err = packPass.repo.CommitObject(newHash); err != nil {
writeRedError(sshStderr, "Daemon failed to get new commit: %v", err)
return 1
}
if isAncestor, err = oldCommit.IsAncestor(newCommit); err != nil {
writeRedError(sshStderr, "Daemon failed to check if old commit is ancestor: %v", err)
return 1
}
if !isAncestor {
// TODO: Create MR snapshot ref instead
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(force pushes are not supported yet)")
continue
}
fmt.Fprintln(sshStderr, ansiec.Blue+"POK"+ansiec.Reset, refName)
}
} else { // Non-contrib branch
allOK = false
fmt.Fprintln(sshStderr, ansiec.Red+"NAK"+ansiec.Reset, refName, "(you cannot push to branches outside of contrib/*)")
}
}
fmt.Fprintln(sshStderr)
if allOK {
fmt.Fprintln(sshStderr, "Overall "+ansiec.Green+"ACK"+ansiec.Reset+" (all checks passed)")
return 0
}
fmt.Fprintln(sshStderr, "Overall "+ansiec.Red+"NAK"+ansiec.Reset+" (one or more branches failed checks)")
return 1
default:
fmt.Fprintln(sshStderr, ansiec.Red+"Invalid hook:", args[0]+ansiec.Reset)
return 1
}
}()
fmt.Fprintln(sshStderr)
_, _ = conn.Write([]byte{hookRet})
}
func serveGitHooks(listener net.Listener) error {
for {
conn, err := listener.Accept()
if err != nil {
return err
}
go hooksHandler(conn)
}
}
func allZero(s string) bool {
for _, r := range s {
if r != '0' {
return false
}
}
return true
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"fmt"
"net/http"
"strings"
"time"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
func httpHandleRepoRaw(writer http.ResponseWriter, request *http.Request, params map[string]any) {
var rawPathSpec, pathSpec string
var repo *git.Repository
var refHash plumbing.Hash
var refHashSlice []byte
var commitObj *object.Commit
var tree *object.Tree
var err error
rawPathSpec = params["rest"].(string)
repo, pathSpec = params["repo"].(*git.Repository), strings.TrimSuffix(rawPathSpec, "/")
params["path_spec"] = pathSpec
if refHash, err = getRefHash(repo, params["ref_type"].(string), params["ref_name"].(string)); err != nil {
errorPage500(writer, params, "Error getting ref hash: "+err.Error())
return
}
refHashSlice = refHash[:]
cacheHandle := append(refHashSlice, []byte(pathSpec)...) //nolint:gocritic
cacheHandle := append(refHashSlice, stringToBytes(pathSpec)...) //nolint:gocritic
if value, found := treeReadmeCache.Get(cacheHandle); found {
params["files"] = value.DisplayTree
renderTemplate(writer, "repo_raw_dir", params)
return
}
if value, found := commitPathFileRawCache.Get(cacheHandle); found {
fmt.Fprint(writer, value)
return
}
if commitObj, err = repo.CommitObject(refHash); err != nil {
errorPage500(writer, params, "Error getting commit object: "+err.Error())
return
}
if tree, err = commitObj.Tree(); err != nil {
errorPage500(writer, params, "Error getting file tree: "+err.Error())
return
}
start := time.Now()
var target *object.Tree
if pathSpec == "" {
target = tree
} else {
if target, err = tree.Tree(pathSpec); err != nil {
var file *object.File
var fileContent string
if file, err = tree.File(pathSpec); err != nil {
errorPage500(writer, params, "Error retrieving path: "+err.Error())
return
}
if redirectNoDir(writer, request) {
return
}
if fileContent, err = file.Contents(); err != nil {
errorPage500(writer, params, "Error reading file: "+err.Error())
return
}
cost := time.Since(start).Nanoseconds()
commitPathFileRawCache.Set(cacheHandle, fileContent, cost)
fmt.Fprint(writer, fileContent)
return
}
}
if redirectDir(writer, request) {
return
}
displayTree := makeDisplayTree(target)
readmeFilename, readmeRendered := renderReadmeAtTree(target)
cost := time.Since(start).Nanoseconds()
params["files"] = displayTree
params["readme_filename"] = readmeFilename
params["readme"] = readmeRendered
treeReadmeCache.Set(cacheHandle, treeReadmeCacheEntry{
DisplayTree: displayTree,
ReadmeFilename: readmeFilename,
ReadmeRendered: readmeRendered,
}, cost)
renderTemplate(writer, "repo_raw_dir", params)
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"bytes"
"html/template"
"net/http"
"path"
"strings"
"time"
"github.com/alecthomas/chroma/v2"
chromaHTML "github.com/alecthomas/chroma/v2/formatters/html"
chromaLexers "github.com/alecthomas/chroma/v2/lexers"
chromaStyles "github.com/alecthomas/chroma/v2/styles"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
func httpHandleRepoTree(writer http.ResponseWriter, request *http.Request, params map[string]any) {
var rawPathSpec, pathSpec string
var repo *git.Repository
var refHash plumbing.Hash
var refHashSlice []byte
var commitObject *object.Commit
var tree *object.Tree
var err error
rawPathSpec = params["rest"].(string)
repo, pathSpec = params["repo"].(*git.Repository), strings.TrimSuffix(rawPathSpec, "/")
params["path_spec"] = pathSpec
if refHash, err = getRefHash(repo, params["ref_type"].(string), params["ref_name"].(string)); err != nil {
errorPage500(writer, params, "Error getting ref hash: "+err.Error())
return
}
refHashSlice = refHash[:]
cacheHandle := append(refHashSlice, []byte(pathSpec)...) //nolint:gocritic
cacheHandle := append(refHashSlice, stringToBytes(pathSpec)...) //nolint:gocritic
if value, found := treeReadmeCache.Get(cacheHandle); found {
params["files"] = value.DisplayTree
params["readme_filename"] = value.ReadmeFilename
params["readme"] = value.ReadmeRendered
renderTemplate(writer, "repo_tree_dir", params)
return
}
if value, found := commitPathFileHTMLCache.Get(cacheHandle); found {
params["file_contents"] = value
renderTemplate(writer, "repo_tree_file", params)
return
}
start := time.Now()
var target *object.Tree
if pathSpec == "" {
if commitObject, err = repo.CommitObject(refHash); err != nil {
errorPage500(writer, params, "Error getting commit object: "+err.Error())
return
}
if tree, err = commitObject.Tree(); err != nil {
errorPage500(writer, params, "Error getting file tree: "+err.Error())
return
}
displayTree := makeDisplayTree(tree)
readmeFilename, readmeRendered := renderReadmeAtTree(tree)
cost := time.Since(start).Nanoseconds()
params["files"] = displayTree
params["readme_filename"] = readmeFilename
params["readme"] = readmeRendered
entry := treeReadmeCacheEntry{
DisplayTree: displayTree,
ReadmeFilename: readmeFilename,
ReadmeRendered: readmeRendered,
}
treeReadmeCache.Set(cacheHandle, entry, cost)
renderTemplate(writer, "repo_tree_dir", params)
return
}
if commitObject, err = repo.CommitObject(refHash); err != nil {
errorPage500(writer, params, "Error getting commit object: "+err.Error())
return
}
if tree, err = commitObject.Tree(); err != nil {
errorPage500(writer, params, "Error getting file tree: "+err.Error())
return
}
if target, err = tree.Tree(pathSpec); err != nil {
var file *object.File
var fileContent string
var lexer chroma.Lexer
var iterator chroma.Iterator
var style *chroma.Style
var formatter *chromaHTML.Formatter
var formattedHTML template.HTML
if file, err = tree.File(pathSpec); err != nil {
errorPage500(writer, params, "Error retrieving path: "+err.Error())
return
}
if redirectNoDir(writer, request) {
return
}
if fileContent, err = file.Contents(); err != nil {
errorPage500(writer, params, "Error reading file: "+err.Error())
return
}
lexer = chromaLexers.Match(pathSpec)
if lexer == nil {
lexer = chromaLexers.Fallback
}
if iterator, err = lexer.Tokenise(nil, fileContent); err != nil {
errorPage500(writer, params, "Error tokenizing code: "+err.Error())
return
}
var formattedHTMLStr bytes.Buffer
style = chromaStyles.Get("autumn")
formatter = chromaHTML.New(chromaHTML.WithClasses(true), chromaHTML.TabWidth(8))
if err = formatter.Format(&formattedHTMLStr, style, iterator); err != nil {
errorPage500(writer, params, "Error formatting code: "+err.Error())
return
}
formattedHTML = template.HTML(formattedHTMLStr.Bytes()) //#nosec G203
cost := time.Since(start).Nanoseconds()
commitPathFileHTMLCache.Set(cacheHandle, formattedHTML, cost)
params["file_contents"] = formattedHTML
renderTemplate(writer, "repo_tree_file", params)
return
}
if len(rawPathSpec) != 0 && rawPathSpec[len(rawPathSpec)-1] != '/' {
http.Redirect(writer, request, path.Base(pathSpec)+"/", http.StatusSeeOther)
return
}
displayTree := makeDisplayTree(target)
readmeFilename, readmeRendered := renderReadmeAtTree(target)
cost := time.Since(start).Nanoseconds()
entry := treeReadmeCacheEntry{
DisplayTree: displayTree,
ReadmeFilename: readmeFilename,
ReadmeRendered: readmeRendered,
}
treeReadmeCache.Set(cacheHandle, entry, cost)
params["readme_filename"], params["readme"] = readmeFilename, readmeRendered
params["files"] = displayTree
renderTemplate(writer, "repo_tree_dir", params)
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"bytes"
"html"
"html/template"
"strings"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/microcosm-cc/bluemonday"
"github.com/niklasfasching/go-org/org"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
)
var markdownConverter = goldmark.New(goldmark.WithExtensions(extension.GFM))
func renderReadmeAtTree(tree *object.Tree) (readmeFilename string, readmeRenderedSafeHTML template.HTML) {
var readmeRenderedUnsafe bytes.Buffer
var readmeFile *object.File
var readmeFileContents string
var err error
if readmeFile, err = tree.File("README"); err == nil {
if readmeFileContents, err = readmeFile.Contents(); err != nil {
return "Error fetching README", escapeHTML("Unable to fetch contents of README: " + err.Error())
}
return "README", template.HTML("<pre>" + html.EscapeString(readmeFileContents) + "</pre>") //#nosec G203
}
if readmeFile, err = tree.File("README.md"); err == nil {
if readmeFileContents, err = readmeFile.Contents(); err != nil {
return "Error fetching README", escapeHTML("Unable to fetch contents of README: " + err.Error())
}
if err = markdownConverter.Convert([]byte(readmeFileContents), &readmeRenderedUnsafe); err != nil {
if err = markdownConverter.Convert(stringToBytes(readmeFileContents), &readmeRenderedUnsafe); err != nil {
return "Error fetching README", escapeHTML("Unable to render README: " + err.Error())
}
return "README.md", template.HTML(bluemonday.UGCPolicy().SanitizeBytes(readmeRenderedUnsafe.Bytes())) //#nosec G203
}
if readmeFile, err = tree.File("README.org"); err == nil {
if readmeFileContents, err = readmeFile.Contents(); err != nil {
return "Error fetching README", escapeHTML("Unable to fetch contents of README: " + err.Error())
}
orgHTML, err := org.New().Parse(strings.NewReader(readmeFileContents), readmeFilename).Write(org.NewHTMLWriter())
if err != nil {
return "Error fetching README", escapeHTML("Unable to render README: " + err.Error())
}
return "README.org", template.HTML(bluemonday.UGCPolicy().Sanitize(orgHTML)) //#nosec G203
}
return "", ""
}
func escapeHTML(s string) template.HTML {
return template.HTML(html.EscapeString(s)) //#nosec G203
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"embed"
"html/template"
"io/fs"
"net/http"
"github.com/tdewolff/minify/v2"
"github.com/tdewolff/minify/v2/html"
)
// We embed all source for easy AGPL compliance.
//
//go:embed .gitignore .gitattributes
//go:embed LICENSE README.md
//go:embed *.go go.mod go.sum
//go:embed *.scfg
//go:embed Makefile
//go:embed static/* templates/* scripts/* sql/*
//go:embed hookc/*.c
//go:embed vendor/*
var sourceFS embed.FS
var sourceHandler = http.StripPrefix(
"/:/source/",
http.FileServer(http.FS(sourceFS)),
)
//go:embed templates/* static/* hookc/hookc
var resourcesFS embed.FS
var templates *template.Template
func loadTemplates() (err error) {
minifier := minify.New()
minifierOptions := html.Minifier{
TemplateDelims: [2]string{"{{", "}}"},
KeepDefaultAttrVals: true,
} //exhaustruct:ignore
minifier.Add("text/html", &minifierOptions)
templates = template.New("templates").Funcs(template.FuncMap{
"first_line": firstLine,
"base_name": baseName,
"path_escape": pathEscape,
"query_escape": queryEscape,
"dereference_error": dereferenceOrZero[error],
"minus": minus,
})
err = fs.WalkDir(resourcesFS, "templates", func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if !d.IsDir() {
content, err := fs.ReadFile(resourcesFS, path)
if err != nil {
return err
}
minified, err := minifier.Bytes("text/html", content)
if err != nil {
return err
}
_, err = templates.Parse(string(minified))
_, err = templates.Parse(bytesToString(minified))
if err != nil {
return err
}
}
return nil
})
return err
}
var staticHandler http.Handler
func init() {
staticFS, err := fs.Sub(resourcesFS, "static")
if err != nil {
panic(err)
}
staticHandler = http.StripPrefix("/:/static/", http.FileServer(http.FS(staticFS)))
}
// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
package main
import (
"fmt"
"net"
"os"
"strings"
gliderSSH "github.com/gliderlabs/ssh"
"go.lindenii.runxiyu.org/lindenii-common/ansiec"
"go.lindenii.runxiyu.org/lindenii-common/clog"
goSSH "golang.org/x/crypto/ssh"
)
var (
serverPubkeyString string
serverPubkeyFP string
serverPubkey goSSH.PublicKey
)
func serveSSH(listener net.Listener) error {
var hostKeyBytes []byte
var hostKey goSSH.Signer
var err error
var server *gliderSSH.Server
if hostKeyBytes, err = os.ReadFile(config.SSH.Key); err != nil {
return err
}
if hostKey, err = goSSH.ParsePrivateKey(hostKeyBytes); err != nil {
return err
}
serverPubkey = hostKey.PublicKey()
serverPubkeyString = string(goSSH.MarshalAuthorizedKey(serverPubkey))
serverPubkeyString = bytesToString(goSSH.MarshalAuthorizedKey(serverPubkey))
serverPubkeyFP = goSSH.FingerprintSHA256(serverPubkey)
server = &gliderSSH.Server{
Handler: func(session gliderSSH.Session) {
clientPubkey := session.PublicKey()
var clientPubkeyStr string
if clientPubkey != nil {
clientPubkeyStr = strings.TrimSuffix(string(goSSH.MarshalAuthorizedKey(clientPubkey)), "\n")
clientPubkeyStr = strings.TrimSuffix(bytesToString(goSSH.MarshalAuthorizedKey(clientPubkey)), "\n")
}
clog.Info("Incoming SSH: " + session.RemoteAddr().String() + " " + clientPubkeyStr + " " + session.RawCommand())
fmt.Fprintln(session.Stderr(), ansiec.Blue+"Lindenii Forge "+VERSION+", source at "+strings.TrimSuffix(config.HTTP.Root, "/")+"/:/source/"+ansiec.Reset+"\r")
cmd := session.Command()
if len(cmd) < 2 {
fmt.Fprintln(session.Stderr(), "Insufficient arguments\r")
return
}
switch cmd[0] {
case "git-upload-pack":
if len(cmd) > 2 {
fmt.Fprintln(session.Stderr(), "Too many arguments\r")
return
}
err = sshHandleUploadPack(session, clientPubkeyStr, cmd[1])
case "git-receive-pack":
if len(cmd) > 2 {
fmt.Fprintln(session.Stderr(), "Too many arguments\r")
return
}
err = sshHandleRecvPack(session, clientPubkeyStr, cmd[1])
default:
fmt.Fprintln(session.Stderr(), "Unsupported command: "+cmd[0]+"\r")
return
}
if err != nil {
fmt.Fprintln(session.Stderr(), err.Error())
return
}
},
PublicKeyHandler: func(_ gliderSSH.Context, _ gliderSSH.PublicKey) bool { return true },
KeyboardInteractiveHandler: func(_ gliderSSH.Context, _ goSSH.KeyboardInteractiveChallenge) bool { return true },
// It is intentional that we do not check any credentials and accept all connections.
// This allows all users to connect and clone repositories. However, the public key
// is passed to handlers, so e.g. the push handler could check the key and reject the
// push if it needs to.
} //exhaustruct:ignore
server.AddHostKey(hostKey)
if err = server.Serve(listener); err != nil {
clog.Fatal(1, "Serving SSH: "+err.Error())
}
return nil
}
// SPDX-License-Identifier: BSD-2-Clause
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
package main
import "unsafe"
// stringToBytes converts a string to a byte slice without copying the string.
// Memory is borrowed from the string.
// The resulting byte slice must not be modified in any form.
func stringToBytes(s string) (bytes []byte) {
return unsafe.Slice(unsafe.StringData(s), len(s))
}
// bytesToString converts a byte slice to a string without copying the bytes.
// Memory is borrowed from the byte slice.
// The source byte slice must not be modified.
func bytesToString(b []byte) string {
return unsafe.String(&b[0], len(b))
}