clerk/journal/loader.go (view raw)
| 1 | package journal |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "slices" |
| 8 | "strings" |
| 9 | |
| 10 | "olexsmir.xyz/clerk/journal/ast" |
| 11 | "olexsmir.xyz/clerk/journal/lexer" |
| 12 | "olexsmir.xyz/clerk/journal/parser" |
| 13 | ) |
| 14 | |
| 15 | type ParsedFile struct { |
| 16 | Path string |
| 17 | Src []byte |
| 18 | Ast *ast.Journal |
| 19 | Includes []*ParsedFile |
| 20 | Errors []*ast.ParseError |
| 21 | FileErrors []*ast.FileError |
| 22 | } |
| 23 | |
| 24 | type Loader struct { |
| 25 | files map[string]*ParsedFile // key is absolute path |
| 26 | } |
| 27 | |
| 28 | func NewLoader() *Loader { |
| 29 | return &Loader{make(map[string]*ParsedFile)} |
| 30 | } |
| 31 | |
| 32 | func (l *Loader) Load(fpath string) (*ParsedFile, error) { |
| 33 | return l.loadFile(fpath, nil) |
| 34 | } |
| 35 | |
| 36 | func (l *Loader) LoadBytes(path string, src []byte) (*ParsedFile, error) { |
| 37 | return l.loadBytes(path, src, nil) |
| 38 | } |
| 39 | |
| 40 | func (l *Loader) Reload(path string, src []byte) (*ParsedFile, error) { |
| 41 | abs, err := filepath.Abs(path) |
| 42 | if err != nil { |
| 43 | return nil, err |
| 44 | } |
| 45 | delete(l.files, abs) |
| 46 | return l.loadBytes(abs, src, nil) |
| 47 | } |
| 48 | |
| 49 | // Ordered returns all files in dependency order (included before includer) |
| 50 | func (l *Loader) Ordered() []*ParsedFile { |
| 51 | visited := make(map[string]bool) |
| 52 | var res []*ParsedFile |
| 53 | var visit func(*ParsedFile) |
| 54 | visit = func(pf *ParsedFile) { |
| 55 | if visited[pf.Path] { |
| 56 | return |
| 57 | } |
| 58 | visited[pf.Path] = true |
| 59 | for _, inc := range pf.Includes { |
| 60 | visit(inc) |
| 61 | } |
| 62 | res = append(res, pf) |
| 63 | } |
| 64 | for _, pf := range l.files { |
| 65 | visit(pf) |
| 66 | } |
| 67 | return res |
| 68 | } |
| 69 | |
| 70 | func (l *Loader) loadFile(fpath string, stack []string) (*ParsedFile, error) { |
| 71 | abs, err := filepath.Abs(fpath) |
| 72 | if err != nil { |
| 73 | return nil, err |
| 74 | } |
| 75 | |
| 76 | // reuse already loaded |
| 77 | if pf, ok := l.files[abs]; ok { |
| 78 | return pf, nil |
| 79 | } |
| 80 | |
| 81 | src, err := os.ReadFile(abs) |
| 82 | if err != nil { |
| 83 | return nil, err |
| 84 | } |
| 85 | |
| 86 | return l.loadBytes(abs, src, stack) |
| 87 | } |
| 88 | |
| 89 | func (l *Loader) loadBytes(path string, src []byte, stack []string) (*ParsedFile, error) { |
| 90 | abs, err := filepath.Abs(path) |
| 91 | if err != nil { |
| 92 | return nil, err |
| 93 | } |
| 94 | |
| 95 | // cycle includes |
| 96 | if slices.Contains(stack, abs) { |
| 97 | return nil, fmt.Errorf("include cycle: %s", strings.Join(append(stack, abs), " → ")) |
| 98 | } |
| 99 | |
| 100 | // reuse already loaded |
| 101 | if pf, ok := l.files[abs]; ok { |
| 102 | return pf, nil |
| 103 | } |
| 104 | |
| 105 | lex := lexer.New(abs, src) |
| 106 | par := parser.New(lex) |
| 107 | j := par.ParseJournal() |
| 108 | |
| 109 | pf := &ParsedFile{ |
| 110 | Path: abs, |
| 111 | Src: src, |
| 112 | Ast: j, |
| 113 | Includes: []*ParsedFile{}, |
| 114 | Errors: j.Errors, |
| 115 | } |
| 116 | l.files[abs] = pf |
| 117 | |
| 118 | for _, entry := range j.Entries { |
| 119 | inc, ok := entry.(*ast.IncludeDirective) |
| 120 | if !ok { |
| 121 | continue |
| 122 | } |
| 123 | |
| 124 | incPath := filepath.Join(filepath.Dir(abs), inc.Path) |
| 125 | |
| 126 | matches, err := filepath.Glob(incPath) |
| 127 | if err != nil || len(matches) == 0 { |
| 128 | pf.FileErrors = append(pf.FileErrors, &ast.FileError{ |
| 129 | Path: incPath, |
| 130 | Span: inc.Span, |
| 131 | Message: fmt.Sprintf("include not found: %s", inc.Path), |
| 132 | }) |
| 133 | continue |
| 134 | } |
| 135 | |
| 136 | for _, match := range matches { |
| 137 | child, err := l.loadFile(match, append(stack, abs)) |
| 138 | if err != nil { |
| 139 | pf.FileErrors = append(pf.FileErrors, &ast.FileError{ |
| 140 | Path: match, |
| 141 | Span: inc.Span, |
| 142 | Message: err.Error(), |
| 143 | }) |
| 144 | continue |
| 145 | } |
| 146 | pf.Includes = append(pf.Includes, child) |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | return pf, nil |
| 151 | } |