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// Package filepathx adds double-star globbing support to the Glob function from the core path/filepath package.
// You might recognize "**" recursive globs from things like your .gitignore file, and zsh.
// The "**" glob represents a recursive wildcard matching zero-or-more directory levels deep.
package filepathx
import (
"os"
"path/filepath"
"strings"
)
// Globs represents one filepath glob, with its elements joined by "**".
type Globs []string
// Glob adds double-star support to the core path/filepath Glob function.
// It's useful when your globs might have double-stars, but you're not sure.
func Glob(pattern string) ([]string, error) {
if !strings.Contains(pattern, "**") {
// passthru to core package if no double-star
return filepath.Glob(pattern)
}
return Globs(strings.Split(pattern, "**")).Expand()
}
// Expand finds matches for the provided Globs.
func (globs Globs) Expand() ([]string, error) {
var matches = []string{""} // accumulate here
for _, glob := range globs {
var hits []string
var hitMap = map[string]bool{}
for _, match := range matches {
paths, err := filepath.Glob(match + glob)
if err != nil {
return nil, err
}
for _, path := range paths {
err = filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// save deduped match from current iteration
if _, ok := hitMap[path]; !ok {
hits = append(hits, path)
hitMap[path] = true
}
return nil
})
if err != nil {
return nil, err
}
}
}
matches = hits
}
// fix up return value for nil input
if globs == nil && len(matches) > 0 && matches[0] == "" {
matches = matches[1:]
}
return matches, nil
}
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