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|
//go:build testtools
// +build testtools
package main
import (
"encoding/json"
"fmt"
"os"
"os/exec"
"runtime"
"strings"
"syscall"
"time"
)
type sshResponse struct {
Href string `json:"href"`
Header map[string]string `json:"header"`
ExpiresAt time.Time `json:"expires_at,omitempty"`
ExpiresIn int `json:"expires_in,omitempty"`
}
func shell() string {
if runtime.GOOS == "windows" {
return "bash"
}
return "sh"
}
func spawnCommand(command string) error {
cmd := exec.Command(shell(), "-c", command)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok {
var ws syscall.WaitStatus
ws, ok = e.ProcessState.Sys().(syscall.WaitStatus)
if ok {
os.Exit(ws.ExitStatus())
}
}
return err
}
func checkSufficientArgs(offset int) {
if len(os.Args) < offset+2 {
fmt.Fprintf(os.Stderr, "got %d args: %v", len(os.Args), os.Args)
os.Exit(1)
}
}
func main() {
// expect args:
// lfs-ssh-echo [-p PORT [--]] git@127.0.0.1 "git-lfs-authenticate REPO OPERATION"
// lfs-ssh-echo [-p PORT [--]] git@127.0.0.1 "git-lfs-transfer REPO OPERATION"
// lfs-ssh-echo git@127.0.0.1 "git-upload-pack REPO"
// lfs-ssh-echo git@127.0.0.1 "git-receive-pack REPO"
offset := 1
checkSufficientArgs(offset)
if masterArg, found := strings.CutPrefix(os.Args[offset], "-oControlMaster="); found {
var master bool
switch masterArg {
case "yes":
master = true
case "no":
master = false
default:
fmt.Fprintf(os.Stderr, "expected \"-oControlMaster=yes\" or \"-oControlMaster=no\", got %q", os.Args[offset])
os.Exit(1)
}
if pathArg, found := strings.CutPrefix(os.Args[offset+1], "-oControlPath="); found {
if master {
if file, err := os.OpenFile(pathArg, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0666); err != nil {
if os.IsExist(err) {
fmt.Fprintf(os.Stderr, "expected %q to not exist", pathArg)
} else {
fmt.Fprintf(os.Stderr, "unable to create %q: %s", pathArg, err)
}
os.Exit(1)
} else {
file.Close()
defer os.Remove(pathArg)
}
} else {
if file, err := os.OpenFile(pathArg, os.O_RDONLY, 0); err != nil {
if os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "expected %q to exist", pathArg)
} else {
fmt.Fprintf(os.Stderr, "unable to open %q: %s", pathArg, err)
}
os.Exit(1)
} else {
file.Close()
}
}
} else {
fmt.Fprintf(os.Stderr, "expected \"-oControlPath\"")
os.Exit(1)
}
offset += 2
}
checkSufficientArgs(offset)
if os.Args[offset] == "-p" {
offset += 2
}
checkSufficientArgs(offset)
if os.Args[offset] == "--" {
offset += 1
}
checkSufficientArgs(offset)
if os.Args[offset] != "git@127.0.0.1" {
fmt.Fprintf(os.Stderr, "expected \"git@127.0.0.1\", got %q", os.Args[offset])
os.Exit(1)
}
// just "git-lfs-(authenticate|transfer) REPO OPERATION" or "git-(upload|receive)-pack REPO"
remoteCmd := strings.Split(os.Args[offset+1], " ")
if len(remoteCmd) < 2 {
fmt.Fprintf(os.Stderr, "bad command line: %s\nargs: %v", remoteCmd, os.Args)
os.Exit(1)
}
if remoteCmd[0] == "git-lfs-transfer" || remoteCmd[0] == "git-upload-pack" || remoteCmd[0] == "git-receive-pack" {
err := spawnCommand(os.Args[offset+1])
if err != nil {
fmt.Fprintf(os.Stderr, "error running command %q: %v", remoteCmd[0], err)
os.Exit(1)
}
return
}
repo := remoteCmd[1]
r := &sshResponse{
Href: fmt.Sprintf("http://127.0.0.1:%s/%s.git/info/lfs", os.Args[2], repo),
}
switch repo {
case "/ssh-expired-absolute":
r.ExpiresAt = time.Now().Add(-5 * time.Minute)
case "/ssh-expired-relative":
r.ExpiresIn = -5
case "/ssh-expired-both":
r.ExpiresAt = time.Now().Add(-5 * time.Minute)
r.ExpiresIn = -5
}
json.NewEncoder(os.Stdout).Encode(r)
}
|
