package complete
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/posener/complete/match"
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)
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// PredictDirs will search for directories in the given started to be typed
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// path, if no path was started to be typed, it will complete to directories
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// in the current working directory.
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func PredictDirs(pattern string) Predictor {
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return files(pattern, false)
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}
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// PredictFiles will search for files matching the given pattern in the started to
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// be typed path, if no path was started to be typed, it will complete to files that
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// match the pattern in the current working directory.
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// To match any file, use "*" as pattern. To match go files use "*.go", and so on.
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func PredictFiles(pattern string) Predictor {
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return files(pattern, true)
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}
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func files(pattern string, allowFiles bool) PredictFunc {
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// search for files according to arguments,
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// if only one directory has matched the result, search recursively into
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// this directory to give more results.
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return func(a Args) (prediction []string) {
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prediction = predictFiles(a, pattern, allowFiles)
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// if the number of prediction is not 1, we either have many results or
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// have no results, so we return it.
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if len(prediction) != 1 {
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return
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}
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// only try deeper, if the one item is a directory
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if stat, err := os.Stat(prediction[0]); err != nil || !stat.IsDir() {
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return
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}
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a.Last = prediction[0]
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return predictFiles(a, pattern, allowFiles)
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}
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}
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func predictFiles(a Args, pattern string, allowFiles bool) []string {
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if strings.HasSuffix(a.Last, "/..") {
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return nil
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}
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dir := a.Directory()
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files := listFiles(dir, pattern, allowFiles)
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// add dir if match
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files = append(files, dir)
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return PredictFilesSet(files).Predict(a)
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}
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// PredictFilesSet predict according to file rules to a given set of file names
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func PredictFilesSet(files []string) PredictFunc {
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return func(a Args) (prediction []string) {
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// add all matching files to prediction
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for _, f := range files {
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f = fixPathForm(a.Last, f)
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// test matching of file to the argument
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if match.File(f, a.Last) {
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prediction = append(prediction, f)
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}
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}
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return
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}
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}
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func listFiles(dir, pattern string, allowFiles bool) []string {
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// set of all file names
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m := map[string]bool{}
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// list files
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if files, err := filepath.Glob(filepath.Join(dir, pattern)); err == nil {
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for _, f := range files {
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if stat, err := os.Stat(f); err != nil || stat.IsDir() || allowFiles {
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m[f] = true
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}
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}
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}
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// list directories
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if dirs, err := ioutil.ReadDir(dir); err == nil {
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for _, d := range dirs {
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if d.IsDir() {
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m[filepath.Join(dir, d.Name())] = true
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}
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}
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}
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list := make([]string, 0, len(m))
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for k := range m {
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list = append(list, k)
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}
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return list
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}
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