1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
"""CLI entry point for the FDL compiler."""
import argparse
import sys
from pathlib import Path
from typing import Dict, List, Optional, Set
from fory_compiler.parser.lexer import Lexer, LexerError
from fory_compiler.parser.parser import Parser, ParseError
from fory_compiler.parser.ast import Schema
from fory_compiler.generators.base import GeneratorOptions
from fory_compiler.generators import GENERATORS
class ImportError(Exception):
"""Error during import resolution."""
pass
def parse_fdl_file(file_path: Path) -> Schema:
"""Parse a single FDL file and return its schema."""
source = file_path.read_text()
lexer = Lexer(source, str(file_path))
tokens = lexer.tokenize()
parser = Parser(tokens)
return parser.parse()
def resolve_import_path(
import_stmt: str,
importing_file: Path,
import_paths: List[Path],
) -> Optional[Path]:
"""
Resolve an import path by searching in multiple directories.
Search order:
1. Relative to the importing file's directory
2. Each import path in order (from -I / --proto_path / --import_path)
Args:
import_stmt: The import path string from the import statement
importing_file: The file containing the import statement
import_paths: List of additional search directories
Returns:
Resolved Path if found, None otherwise
"""
# First, try relative to the importing file
relative_path = (importing_file.parent / import_stmt).resolve()
if relative_path.exists():
return relative_path
# Then try each import path
for search_path in import_paths:
candidate = (search_path / import_stmt).resolve()
if candidate.exists():
return candidate
return None
def resolve_imports(
file_path: Path,
import_paths: Optional[List[Path]] = None,
visited: Optional[Set[Path]] = None,
cache: Optional[Dict[Path, Schema]] = None,
) -> Schema:
"""
Recursively resolve imports and merge all types into a single schema.
Args:
file_path: Path to the FDL file to parse
import_paths: List of directories to search for imports
visited: Set of already visited files (for cycle detection)
cache: Cache of already parsed schemas
Returns:
Schema with all imported types merged in
"""
if import_paths is None:
import_paths = []
if visited is None:
visited = set()
if cache is None:
cache = {}
# Normalize path
file_path = file_path.resolve()
# Check for circular imports
if file_path in visited:
raise ImportError(f"Circular import detected: {file_path}")
# Return cached schema if available
if file_path in cache:
return cache[file_path]
visited.add(file_path)
# Parse the file
schema = parse_fdl_file(file_path)
# Process imports
imported_enums = []
imported_messages = []
for imp in schema.imports:
# Resolve import path using search paths
import_path = resolve_import_path(imp.path, file_path, import_paths)
if import_path is None:
# Build helpful error message with search locations
searched = [str(file_path.parent)]
searched.extend(str(p) for p in import_paths)
raise ImportError(
f"Import not found: {imp.path}\n"
f" at line {imp.line}, column {imp.column}\n"
f" Searched in: {', '.join(searched)}"
)
# Recursively resolve the imported file
imported_schema = resolve_imports(
import_path, import_paths, visited.copy(), cache
)
# Collect types from imported schema
imported_enums.extend(imported_schema.enums)
imported_messages.extend(imported_schema.messages)
# Create merged schema with imported types first (so they can be referenced)
merged_schema = Schema(
package=schema.package,
imports=schema.imports,
enums=imported_enums + schema.enums,
messages=imported_messages + schema.messages,
)
cache[file_path] = merged_schema
return merged_schema
def parse_args(args: Optional[List[str]] = None) -> argparse.Namespace:
"""Parse command line arguments."""
parser = argparse.ArgumentParser(
prog="fory",
description="FDL (Fory Definition Language) compiler",
)
subparsers = parser.add_subparsers(dest="command", help="Available commands")
# compile command
compile_parser = subparsers.add_parser(
"compile",
help="Compile FDL files to language-specific code",
)
compile_parser.add_argument(
"files",
nargs="+",
type=Path,
metavar="FILE",
help="FDL files to compile",
)
compile_parser.add_argument(
"--lang",
type=str,
default="all",
help="Comma-separated list of target languages (java,python,cpp,rust,go). Default: all",
)
compile_parser.add_argument(
"--output",
"-o",
type=Path,
default=Path("./generated"),
help="Output directory. Default: ./generated",
)
compile_parser.add_argument(
"--package",
type=str,
default=None,
help="Override package name from FDL file",
)
compile_parser.add_argument(
"-I",
"--proto_path",
"--import_path",
dest="import_paths",
action="append",
type=Path,
default=[],
metavar="PATH",
help="Add a directory to the import search path. Can be specified multiple times.",
)
# Language-specific output directories (protoc-style)
compile_parser.add_argument(
"--java_out",
type=Path,
default=None,
metavar="DST_DIR",
help="Generate Java code in DST_DIR",
)
compile_parser.add_argument(
"--python_out",
type=Path,
default=None,
metavar="DST_DIR",
help="Generate Python code in DST_DIR",
)
compile_parser.add_argument(
"--cpp_out",
type=Path,
default=None,
metavar="DST_DIR",
help="Generate C++ code in DST_DIR",
)
compile_parser.add_argument(
"--go_out",
type=Path,
default=None,
metavar="DST_DIR",
help="Generate Go code in DST_DIR",
)
compile_parser.add_argument(
"--rust_out",
type=Path,
default=None,
metavar="DST_DIR",
help="Generate Rust code in DST_DIR",
)
compile_parser.add_argument(
"--go_nested_type_style",
type=str,
default=None,
choices=["camelcase", "underscore"],
help="Go nested type naming style: camelcase or underscore (default)",
)
return parser.parse_args(args)
def get_languages(lang_arg: str) -> List[str]:
"""Parse the language argument into a list of languages."""
if lang_arg == "all":
return list(GENERATORS.keys())
languages = [lang.strip().lower() for lang in lang_arg.split(",")]
# Validate languages
invalid = [lang for lang in languages if lang not in GENERATORS]
if invalid:
print(f"Error: Unknown language(s): {', '.join(invalid)}", file=sys.stderr)
print(f"Available: {', '.join(GENERATORS.keys())}", file=sys.stderr)
sys.exit(1)
return languages
def compile_file(
file_path: Path,
lang_output_dirs: Dict[str, Path],
package_override: Optional[str] = None,
import_paths: Optional[List[Path]] = None,
go_nested_type_style: Optional[str] = None,
) -> bool:
"""Compile a single FDL file with import resolution.
Args:
file_path: Path to the FDL file
lang_output_dirs: Dictionary mapping language name to output directory
package_override: Optional package name override
import_paths: List of import search paths
"""
print(f"Compiling {file_path}...")
# Parse and resolve imports
try:
schema = resolve_imports(file_path, import_paths)
except OSError as e:
print(f"Error reading {file_path}: {e}", file=sys.stderr)
return False
except (LexerError, ParseError) as e:
print(f"Error: {e}", file=sys.stderr)
return False
except ImportError as e:
print(f"Import error: {e}", file=sys.stderr)
return False
# Print import info
if schema.imports:
print(f" Resolved {len(schema.imports)} import(s)")
# Validate merged schema
errors = schema.validate()
if errors:
for error in errors:
print(f"Error: {error}", file=sys.stderr)
return False
# Generate code for each language
for lang, lang_output in lang_output_dirs.items():
options = GeneratorOptions(
output_dir=lang_output,
package_override=package_override,
go_nested_type_style=go_nested_type_style,
)
generator_class = GENERATORS[lang]
generator = generator_class(schema, options)
files = generator.generate()
generator.write_files(files)
for f in files:
print(f" Generated: {lang_output / f.path}")
return True
def cmd_compile(args: argparse.Namespace) -> int:
"""Handle the compile command."""
# Build language -> output directory mapping
# Language-specific --{lang}_out options take precedence
lang_specific_outputs = {
"java": args.java_out,
"python": args.python_out,
"cpp": args.cpp_out,
"go": args.go_out,
"rust": args.rust_out,
}
# Determine which languages to generate
lang_output_dirs: Dict[str, Path] = {}
# First, add languages specified via --{lang}_out (these use direct paths)
for lang, out_dir in lang_specific_outputs.items():
if out_dir is not None:
lang_output_dirs[lang] = out_dir
# Then, add languages from --lang that don't have specific output dirs
# These use output_dir/lang pattern
if args.lang != "all" or not lang_output_dirs:
# Only use --lang if no language-specific outputs are set, or if --lang is explicit
languages_from_arg = get_languages(args.lang)
for lang in languages_from_arg:
if lang not in lang_output_dirs:
lang_output_dirs[lang] = args.output / lang
if not lang_output_dirs:
print("Error: No target languages specified.", file=sys.stderr)
print("Use --lang or --{lang}_out options.", file=sys.stderr)
return 1
# Validate that all languages are supported
invalid = [lang for lang in lang_output_dirs.keys() if lang not in GENERATORS]
if invalid:
print(f"Error: Unknown language(s): {', '.join(invalid)}", file=sys.stderr)
print(f"Available: {', '.join(GENERATORS.keys())}", file=sys.stderr)
return 1
# Resolve and validate import paths (support comma-separated paths)
import_paths = []
for p in args.import_paths:
# Split by comma to support multiple paths in one option
for part in str(p).split(","):
part = part.strip()
if not part:
continue
resolved = Path(part).resolve()
if not resolved.is_dir():
print(
f"Warning: Import path is not a directory: {part}", file=sys.stderr
)
import_paths.append(resolved)
# Create output directories
for out_dir in lang_output_dirs.values():
out_dir.mkdir(parents=True, exist_ok=True)
success = True
for file_path in args.files:
if not file_path.exists():
print(f"Error: File not found: {file_path}", file=sys.stderr)
success = False
continue
if not compile_file(
file_path,
lang_output_dirs,
args.package,
import_paths,
args.go_nested_type_style,
):
success = False
return 0 if success else 1
def main(args: Optional[List[str]] = None) -> int:
"""Main entry point."""
parsed = parse_args(args)
if parsed.command is None:
print("Usage: fory <command> [options]", file=sys.stderr)
print("Commands: compile", file=sys.stderr)
print("Use 'fory <command> --help' for more information", file=sys.stderr)
return 1
if parsed.command == "compile":
return cmd_compile(parsed)
return 0
if __name__ == "__main__":
sys.exit(main())