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package vcs
import (
"os"
"runtime"
"strings"
)
// DetectVcsFromFS detects the type from the local path.
// Is there a better way to do this?
func DetectVcsFromFS(vcsPath string) (Type, error) {
// There are cases under windows that a path could start with a / and it needs
// to be stripped. For example, a path such as /C:\foio\bar.
if runtime.GOOS == "windows" && strings.HasPrefix(vcsPath, "/") {
vcsPath = strings.TrimPrefix(vcsPath, "/")
}
// When the local directory to the package doesn't exist
// it's not yet downloaded so we can't detect the type
// locally.
if _, err := os.Stat(vcsPath); os.IsNotExist(err) {
return "", ErrCannotDetectVCS
}
separator := string(os.PathSeparator)
// Walk through each of the different VCS types to see if
// one can be detected. Do this is order of guessed popularity.
if _, err := os.Stat(vcsPath + separator + ".git"); err == nil {
return Git, nil
}
if _, err := os.Stat(vcsPath + separator + ".svn"); err == nil {
return Svn, nil
}
if _, err := os.Stat(vcsPath + separator + ".hg"); err == nil {
return Hg, nil
}
if _, err := os.Stat(vcsPath + separator + ".bzr"); err == nil {
return Bzr, nil
}
// If one was not already detected than we default to not finding it.
return "", ErrCannotDetectVCS
}
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