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package cli
import (
"os"
"path/filepath"
"strings"
)
// Finder holds a list of file paths.
type Finder struct {
BasePaths []string
Extensions []string
}
// Find returns the first valid existing file among configFile
// and the paths already registered with Finder.
func (f Finder) Find(configFile string) (string, error) {
paths := f.getPaths(configFile)
for _, filePath := range paths {
fp := os.ExpandEnv(filePath)
_, err := os.Stat(fp)
if os.IsNotExist(err) {
continue
}
if err != nil {
return "", err
}
return filepath.Abs(fp)
}
return "", nil
}
func (f Finder) getPaths(configFile string) []string {
var paths []string
if strings.TrimSpace(configFile) != "" {
paths = append(paths, configFile)
}
for _, basePath := range f.BasePaths {
for _, ext := range f.Extensions {
paths = append(paths, basePath+"."+ext)
}
}
return paths
}
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