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package main
import (
"os"
"fmt"
"os/exec"
"syscall"
"path/filepath"
"log"
"flag"
"bytes"
"strings"
"golang.org/x/crypto/ssh/terminal"
)
func main() {
var parallel = flag.Bool("p", false, "Run hooks in parallel")
var trace = flag.Bool("x", false, "Trace mode")
flag.Parse()
if len(os.Getenv("PLUGINHOOK_TRACE")) > 0 {
*trace = true
}
pluginPath := os.Getenv("PLUGIN_PATH")
if pluginPath == "" {
log.Fatal("[ERROR] Unable to locate plugins: set $PLUGIN_PATH\n")
os.Exit(1)
}
if flag.NArg() < 1 {
log.Fatal("[ERROR] Hook name argument is required\n")
os.Exit(1)
}
cmds := make([]exec.Cmd, 0)
var matches, _ = filepath.Glob(fmt.Sprintf("%s/*/%s", pluginPath, flag.Arg(0)))
for _, hook := range matches {
cmd := exec.Command(hook, flag.Args()[1:]...)
cmds = append(cmds, *cmd)
}
for i := len(cmds)-1; i >= 0; i-- {
cmds[i].Stderr = os.Stderr
if i == len(cmds)-1 {
cmds[i].Stdout = os.Stdout
}
if i > 0 {
if *parallel {
stdout, err := cmds[i-1].StdoutPipe()
if err != nil {
log.Fatal(err)
}
cmds[i].Stdin = stdout
} else {
var buf bytes.Buffer
cmds[i-1].Stdout = &buf
cmds[i].Stdin = &buf
}
}
if i == 0 && !terminal.IsTerminal(syscall.Stdin) {
cmds[i].Stdin = os.Stdin
}
}
if *parallel {
done := make(chan bool, len(cmds))
for i := 0; i < len(cmds); i++ {
go func(cmd exec.Cmd, i int) {
if *trace {
fmt.Fprintln(os.Stderr, "+", strings.Join(cmds[i].Args, " "))
}
err := cmd.Run()
if msg, ok := err.(*exec.ExitError); ok { // there is error code
os.Exit(msg.Sys().(syscall.WaitStatus).ExitStatus())
}
done <- true
}(cmds[i], i)
}
for i := 0; i < len(cmds); i++ {
<-done
}
} else {
for i := 0; i < len(cmds); i++ {
if *trace {
fmt.Fprintln(os.Stderr, "+", strings.Join(cmds[i].Args, " "))
}
err := cmds[i].Run()
if msg, ok := err.(*exec.ExitError); ok { // there is error code
os.Exit(msg.Sys().(syscall.WaitStatus).ExitStatus())
}
}
}
}
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