1 files changed, 177 insertions, 0 deletions
diff --git a/vendor/github.com/magefile/mage/sh/cmd.go b/vendor/github.com/magefile/mage/sh/cmd.go
new file mode 100644
index 00000000..06af62de
--- /dev/null
+++ b/vendor/github.com/magefile/mage/sh/cmd.go
@@ -0,0 +1,177 @@
+package sh
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/magefile/mage/mg"
+)
+
+// RunCmd returns a function that will call Run with the given command. This is
+// useful for creating command aliases to make your scripts easier to read, like
+// this:
+//
+//  // in a helper file somewhere
+//  var g0 = sh.RunCmd("go")  // go is a keyword :(
+//
+//  // somewhere in your main code
+//	if err := g0("install", "github.com/gohugo/hugo"); err != nil {
+//		return err
+//  }
+//
+// Args passed to command get baked in as args to the command when you run it.
+// Any args passed in when you run the returned function will be appended to the
+// original args.  For example, this is equivalent to the above:
+//
+//  var goInstall = sh.RunCmd("go", "install") goInstall("github.com/gohugo/hugo")
+//
+// RunCmd uses Exec underneath, so see those docs for more details.
+func RunCmd(cmd string, args ...string) func(args ...string) error {
+	return func(args2 ...string) error {
+		return Run(cmd, append(args, args2...)...)
+	}
+}
+
+// OutCmd is like RunCmd except the command returns the output of the
+// command.
+func OutCmd(cmd string, args ...string) func(args ...string) (string, error) {
+	return func(args2 ...string) (string, error) {
+		return Output(cmd, append(args, args2...)...)
+	}
+}
+
+// Run is like RunWith, but doesn't specify any environment variables.
+func Run(cmd string, args ...string) error {
+	return RunWith(nil, cmd, args...)
+}
+
+// RunV is like Run, but always sends the command's stdout to os.Stdout.
+func RunV(cmd string, args ...string) error {
+	_, err := Exec(nil, os.Stdout, os.Stderr, cmd, args...)
+	return err
+}
+
+// RunWith runs the given command, directing stderr to this program's stderr and
+// printing stdout to stdout if mage was run with -v.  It adds adds env to the
+// environment variables for the command being run. Environment variables should
+// be in the format name=value.
+func RunWith(env map[string]string, cmd string, args ...string) error {
+	var output io.Writer
+	if mg.Verbose() {
+		output = os.Stdout
+	}
+	_, err := Exec(env, output, os.Stderr, cmd, args...)
+	return err
+}
+
+// RunWithV is like RunWith, but always sends the command's stdout to os.Stdout.
+func RunWithV(env map[string]string, cmd string, args ...string) error {
+	_, err := Exec(env, os.Stdout, os.Stderr, cmd, args...)
+	return err
+}
+
+// Output runs the command and returns the text from stdout.
+func Output(cmd string, args ...string) (string, error) {
+	buf := &bytes.Buffer{}
+	_, err := Exec(nil, buf, os.Stderr, cmd, args...)
+	return strings.TrimSuffix(buf.String(), "\n"), err
+}
+
+// OutputWith is like RunWith, but returns what is written to stdout.
+func OutputWith(env map[string]string, cmd string, args ...string) (string, error) {
+	buf := &bytes.Buffer{}
+	_, err := Exec(env, buf, os.Stderr, cmd, args...)
+	return strings.TrimSuffix(buf.String(), "\n"), err
+}
+
+// Exec executes the command, piping its stderr to mage's stderr and
+// piping its stdout to the given writer. If the command fails, it will return
+// an error that, if returned from a target or mg.Deps call, will cause mage to
+// exit with the same code as the command failed with.  Env is a list of
+// environment variables to set when running the command, these override the
+// current environment variables set (which are also passed to the command). cmd
+// and args may include references to environment variables in $FOO format, in
+// which case these will be expanded before the command is run.
+//
+// Ran reports if the command ran (rather than was not found or not executable).
+// Code reports the exit code the command returned if it ran. If err == nil, ran
+// is always true and code is always 0.
+func Exec(env map[string]string, stdout, stderr io.Writer, cmd string, args ...string) (ran bool, err error) {
+	expand := func(s string) string {
+		s2, ok := env[s]
+		if ok {
+			return s2
+		}
+		return os.Getenv(s)
+	}
+	cmd = os.Expand(cmd, expand)
+	for i := range args {
+		args[i] = os.Expand(args[i], expand)
+	}
+	ran, code, err := run(env, stdout, stderr, cmd, args...)
+	if err == nil {
+		return true, nil
+	}
+	if ran {
+		return ran, mg.Fatalf(code, `running "%s %s" failed with exit code %d`, cmd, strings.Join(args, " "), code)
+	}
+	return ran, fmt.Errorf(`failed to run "%s %s: %v"`, cmd, strings.Join(args, " "), err)
+}
+
+func run(env map[string]string, stdout, stderr io.Writer, cmd string, args ...string) (ran bool, code int, err error) {
+	c := exec.Command(cmd, args...)
+	c.Env = os.Environ()
+	for k, v := range env {
+		c.Env = append(c.Env, k+"="+v)
+	}
+	c.Stderr = stderr
+	c.Stdout = stdout
+	c.Stdin = os.Stdin
+	log.Println("exec:", cmd, strings.Join(args, " "))
+	err = c.Run()
+	return CmdRan(err), ExitStatus(err), err
+}
+
+// CmdRan examines the error to determine if it was generated as a result of a
+// command running via os/exec.Command.  If the error is nil, or the command ran
+// (even if it exited with a non-zero exit code), CmdRan reports true.  If the
+// error is an unrecognized type, or it is an error from exec.Command that says
+// the command failed to run (usually due to the command not existing or not
+// being executable), it reports false.
+func CmdRan(err error) bool {
+	if err == nil {
+		return true
+	}
+	ee, ok := err.(*exec.ExitError)
+	if ok {
+		return ee.Exited()
+	}
+	return false
+}
+
+type exitStatus interface {
+	ExitStatus() int
+}
+
+// ExitStatus returns the exit status of the error if it is an exec.ExitError
+// or if it implements ExitStatus() int.
+// 0 if it is nil or 1 if it is a different error.
+func ExitStatus(err error) int {
+	if err == nil {
+		return 0
+	}
+	if e, ok := err.(exitStatus); ok {
+		return e.ExitStatus()
+	}
+	if e, ok := err.(*exec.ExitError); ok {
+		if ex, ok := e.Sys().(exitStatus); ok {
+			return ex.ExitStatus()
+		}
+	}
+	return 1
+}