56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
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package library
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import (
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"path/filepath"
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"strings"
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)
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// ResolveScanPaths returns a deduplicated list of directories to scan.
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// Always includes dlDir, moviesDir, tvDir (when non-empty).
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// Adds scanPath if non-empty.
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// Removes paths that are subdirectories of other paths in the list,
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// since a parent walk already covers them.
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func ResolveScanPaths(dlDir, moviesDir, tvDir, scanPath string) []string {
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raw := make([]string, 0, 4)
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for _, p := range []string{dlDir, moviesDir, tvDir, scanPath} {
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if p != "" {
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raw = append(raw, filepath.Clean(p))
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}
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}
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return deduplicatePaths(raw)
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}
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// deduplicatePaths removes duplicate paths and paths that are subdirectories
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// of another path already present in the list.
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func deduplicatePaths(paths []string) []string {
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// Remove exact duplicates first.
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seen := make(map[string]bool, len(paths))
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unique := make([]string, 0, len(paths))
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for _, p := range paths {
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if !seen[p] {
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seen[p] = true
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unique = append(unique, p)
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}
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}
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// Remove paths that are subdirs of another path in the list.
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result := make([]string, 0, len(unique))
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for _, p := range unique {
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isChild := false
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for _, other := range unique {
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if other == p {
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continue
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}
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rel, err := filepath.Rel(other, p)
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if err == nil && rel != "." && !strings.HasPrefix(rel, "..") {
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isChild = true
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break
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}
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}
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if !isChild {
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result = append(result, p)
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}
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}
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return result
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}
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