/
main.go
93 lines (77 loc) · 1.92 KB
/
main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"sync"
"time"
"github.com/jesselucas/executil"
)
const Version = "0.0.4"
var (
wg sync.WaitGroup
)
type cmd struct {
Path string // Path to command
Name string // Name of command
Args []string // Args to pass to command
Sleep int // in Miliseconds
}
func main() {
jsonConfigPathDefault := "commands.json"
// Check for command line configuration flags
var (
configPathUsage = fmt.Sprint("Path to config json.")
configPathPtr = flag.String("configpath", jsonConfigPathDefault, configPathUsage)
versionUsage = "Prints current version" + " (v. " + Version + ")"
versionPtr = flag.Bool("version", false, versionUsage)
)
// Set up short hand flags
flag.BoolVar(versionPtr, "v", false, versionUsage+" (shorthand)")
flag.Parse()
if *versionPtr {
fmt.Println(Version)
os.Exit(0)
}
// Setup commands fron commands.json
cmds, cmdsErr := createCommandsFromJSON(*configPathPtr)
if cmdsErr != nil {
log.Fatal(cmdsErr)
}
// Run them in order
for _, cmd := range cmds {
sleep := time.Duration(cmd.Sleep) * time.Millisecond
run(sleep, cmd.Path, cmd.Name, cmd.Args...)
}
}
func run(sleep time.Duration, path string, command string, args ...string) {
fmt.Println("[Installer] Running: ", command, args)
cmd := executil.Command(command, args...)
cmd.OutputPrefix = command
err := cmd.StartAndWait()
if err != nil {
fmt.Println(err)
}
if sleep != 0 {
fmt.Printf("[Installer] Sleeping: %s for %f seconds \n", command, sleep.Seconds())
time.Sleep(sleep)
}
}
func createCommandsFromJSON(jsonPath string) ([]*cmd, error) {
cmdFile, err := ioutil.ReadFile(jsonPath)
if err != nil {
log.Fatal("Error:", err)
return nil, err
}
// Unmarshal
var cmds []*cmd
err = json.Unmarshal(cmdFile, &cmds)
if err != nil {
log.Fatalf("Can't unmarshal cmdFile.: %s", cmdFile)
return nil, err
}
return cmds, nil
}