terraform/config/module/get_git.go

40 lines
800 B
Go

package module
import (
"fmt"
"net/url"
"os"
"os/exec"
)
// GitGetter is a Getter implementation that will download a module from
// a git repository.
type GitGetter struct{}
func (g *GitGetter) Get(dst string, u *url.URL) error {
if _, err := exec.LookPath("git"); err != nil {
return fmt.Errorf("git must be available and on the PATH")
}
_, err := os.Stat(dst)
if err != nil && !os.IsNotExist(err) {
return err
}
if err == nil {
return g.update(dst, u)
}
return g.clone(dst, u)
}
func (g *GitGetter) clone(dst string, u *url.URL) error {
cmd := exec.Command("git", "clone", u.String(), dst)
return getRunCommand(cmd)
}
func (g *GitGetter) update(dst string, u *url.URL) error {
cmd := exec.Command("git", "pull", "--ff-only")
cmd.Dir = dst
return getRunCommand(cmd)
}