ironsmith/exec.go

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// Copyright 2016 Tim Shannon. All rights reserved.
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.
package main
import (
"fmt"
"os/exec"
"strings"
)
func runCmd(cmd, dir string, env []string) ([]byte, error) {
s := strings.Fields(strings.Replace(cmd, "@dir", dir, -1))
for i := range env {
env[i] = strings.Replace(env[i], "@dir", dir, -1)
}
var args []string
if len(s) > 1 {
args = s[1:]
}
ec := exec.Command(s[0], args...)
ec.Dir = dir
ec.Env = env
vlog("Executing command: %s in dir %s\n", cmd, dir)
result, err := ec.CombinedOutput()
if err != nil {
return nil, fmt.Errorf("%s\n%s", err, result)
}
return result, nil
}