cloudflare/pint
Publicmirrored from https://github.com/cloudflare/pintAvailable
internal/discovery/glob.go
150lines · modecode
| 1 | package discovery |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "io/fs" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "regexp" |
| 9 | ) |
| 10 | |
| 11 | func NewGlobFinder(patterns []string, relaxed []*regexp.Regexp) GlobFinder { |
| 12 | return GlobFinder{ |
| 13 | patterns: patterns, |
| 14 | relaxed: relaxed, |
| 15 | } |
| 16 | } |
| 17 | |
| 18 | type GlobFinder struct { |
| 19 | patterns []string |
| 20 | relaxed []*regexp.Regexp |
| 21 | } |
| 22 | |
| 23 | func (f GlobFinder) Find() (entries []Entry, err error) { |
| 24 | paths := filePaths{} |
| 25 | for _, p := range f.patterns { |
| 26 | matches, err := filepath.Glob(p) |
| 27 | if err != nil { |
| 28 | return nil, err |
| 29 | } |
| 30 | |
| 31 | for _, path := range matches { |
| 32 | subpaths, err := findFiles(path) |
| 33 | if err != nil { |
| 34 | return nil, err |
| 35 | } |
| 36 | for _, subpath := range subpaths { |
| 37 | if !paths.hasPath(subpath.path) { |
| 38 | paths = append(paths, subpath) |
| 39 | } |
| 40 | } |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | if len(paths) == 0 { |
| 45 | return nil, fmt.Errorf("no matching files") |
| 46 | } |
| 47 | |
| 48 | for _, fp := range paths { |
| 49 | fd, err := os.Open(fp.path) |
| 50 | if err != nil { |
| 51 | return nil, err |
| 52 | } |
| 53 | el, err := readRules(fp.target, fp.path, fd, !matchesAny(f.relaxed, fp.target)) |
| 54 | if err != nil { |
| 55 | fd.Close() |
| 56 | return nil, fmt.Errorf("invalid file syntax: %w", err) |
| 57 | } |
| 58 | fd.Close() |
| 59 | for _, e := range el { |
| 60 | e.State = Noop |
| 61 | if len(e.ModifiedLines) == 0 { |
| 62 | e.ModifiedLines = e.Rule.Lines() |
| 63 | } |
| 64 | entries = append(entries, e) |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | return entries, nil |
| 69 | } |
| 70 | |
| 71 | type filePath struct { |
| 72 | path string |
| 73 | target string |
| 74 | } |
| 75 | |
| 76 | type filePaths []filePath |
| 77 | |
| 78 | func (fps filePaths) hasPath(p string) bool { |
| 79 | for _, fp := range fps { |
| 80 | if fp.path == p { |
| 81 | return true |
| 82 | } |
| 83 | } |
| 84 | return false |
| 85 | } |
| 86 | |
| 87 | func findFiles(path string) (paths filePaths, err error) { |
| 88 | s, err := os.Stat(path) |
| 89 | if err != nil { |
| 90 | return nil, err |
| 91 | } |
| 92 | |
| 93 | // nolint: exhaustive |
| 94 | switch { |
| 95 | case s.IsDir(): |
| 96 | subpaths, err := walkDir(path) |
| 97 | if err != nil { |
| 98 | return nil, err |
| 99 | } |
| 100 | paths = append(paths, subpaths...) |
| 101 | default: |
| 102 | target, err := filepath.EvalSymlinks(path) |
| 103 | if err != nil { |
| 104 | return nil, err |
| 105 | } |
| 106 | paths = append(paths, filePath{path: path, target: target}) |
| 107 | } |
| 108 | |
| 109 | return paths, nil |
| 110 | } |
| 111 | |
| 112 | func walkDir(dirname string) (paths filePaths, err error) { |
| 113 | err = filepath.WalkDir(dirname, |
| 114 | func(path string, d fs.DirEntry, err error) error { |
| 115 | if err != nil { |
| 116 | return err |
| 117 | } |
| 118 | |
| 119 | // nolint: exhaustive |
| 120 | switch d.Type() { |
| 121 | case fs.ModeDir: |
| 122 | return nil |
| 123 | case fs.ModeSymlink: |
| 124 | dest, err := filepath.EvalSymlinks(path) |
| 125 | if err != nil { |
| 126 | return err |
| 127 | } |
| 128 | |
| 129 | s, err := os.Stat(dest) |
| 130 | if err != nil { |
| 131 | return err |
| 132 | } |
| 133 | if s.IsDir() { |
| 134 | subpaths, err := findFiles(dest) |
| 135 | if err != nil { |
| 136 | return err |
| 137 | } |
| 138 | paths = append(paths, subpaths...) |
| 139 | } else { |
| 140 | paths = append(paths, filePath{path: path, target: dest}) |
| 141 | } |
| 142 | default: |
| 143 | paths = append(paths, filePath{path: path, target: path}) |
| 144 | } |
| 145 | |
| 146 | return nil |
| 147 | }) |
| 148 | |
| 149 | return paths, err |
| 150 | } |