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296 lines
10 KiB
296 lines
10 KiB
#!/usr/bin/env python3 |
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# SPDX-License-Identifier: GPL-2.0 |
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# Copyright Thomas Gleixner <[email protected]> |
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from argparse import ArgumentParser |
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from ply import lex, yacc |
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import locale |
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import traceback |
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import sys |
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import git |
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import re |
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import os |
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class ParserException(Exception): |
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def __init__(self, tok, txt): |
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self.tok = tok |
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self.txt = txt |
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class SPDXException(Exception): |
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def __init__(self, el, txt): |
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self.el = el |
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self.txt = txt |
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class SPDXdata(object): |
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def __init__(self): |
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self.license_files = 0 |
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self.exception_files = 0 |
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self.licenses = [ ] |
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self.exceptions = { } |
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# Read the spdx data from the LICENSES directory |
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def read_spdxdata(repo): |
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# The subdirectories of LICENSES in the kernel source |
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# Note: exceptions needs to be parsed as last directory. |
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license_dirs = [ "preferred", "dual", "deprecated", "exceptions" ] |
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lictree = repo.head.commit.tree['LICENSES'] |
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spdx = SPDXdata() |
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for d in license_dirs: |
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for el in lictree[d].traverse(): |
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if not os.path.isfile(el.path): |
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continue |
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exception = None |
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for l in open(el.path, encoding="utf-8").readlines(): |
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if l.startswith('Valid-License-Identifier:'): |
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lid = l.split(':')[1].strip().upper() |
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if lid in spdx.licenses: |
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raise SPDXException(el, 'Duplicate License Identifier: %s' %lid) |
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else: |
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spdx.licenses.append(lid) |
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elif l.startswith('SPDX-Exception-Identifier:'): |
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exception = l.split(':')[1].strip().upper() |
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spdx.exceptions[exception] = [] |
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elif l.startswith('SPDX-Licenses:'): |
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for lic in l.split(':')[1].upper().strip().replace(' ', '').replace('\t', '').split(','): |
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if not lic in spdx.licenses: |
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raise SPDXException(None, 'Exception %s missing license %s' %(exception, lic)) |
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spdx.exceptions[exception].append(lic) |
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elif l.startswith("License-Text:"): |
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if exception: |
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if not len(spdx.exceptions[exception]): |
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raise SPDXException(el, 'Exception %s is missing SPDX-Licenses' %exception) |
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spdx.exception_files += 1 |
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else: |
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spdx.license_files += 1 |
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break |
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return spdx |
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class id_parser(object): |
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reserved = [ 'AND', 'OR', 'WITH' ] |
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tokens = [ 'LPAR', 'RPAR', 'ID', 'EXC' ] + reserved |
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precedence = ( ('nonassoc', 'AND', 'OR'), ) |
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t_ignore = ' \t' |
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def __init__(self, spdx): |
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self.spdx = spdx |
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self.lasttok = None |
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self.lastid = None |
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self.lexer = lex.lex(module = self, reflags = re.UNICODE) |
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# Initialize the parser. No debug file and no parser rules stored on disk |
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# The rules are small enough to be generated on the fly |
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self.parser = yacc.yacc(module = self, write_tables = False, debug = False) |
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self.lines_checked = 0 |
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self.checked = 0 |
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self.spdx_valid = 0 |
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self.spdx_errors = 0 |
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self.curline = 0 |
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self.deepest = 0 |
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# Validate License and Exception IDs |
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def validate(self, tok): |
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id = tok.value.upper() |
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if tok.type == 'ID': |
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if not id in self.spdx.licenses: |
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raise ParserException(tok, 'Invalid License ID') |
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self.lastid = id |
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elif tok.type == 'EXC': |
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if id not in self.spdx.exceptions: |
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raise ParserException(tok, 'Invalid Exception ID') |
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if self.lastid not in self.spdx.exceptions[id]: |
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raise ParserException(tok, 'Exception not valid for license %s' %self.lastid) |
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self.lastid = None |
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elif tok.type != 'WITH': |
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self.lastid = None |
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# Lexer functions |
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def t_RPAR(self, tok): |
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r'\)' |
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self.lasttok = tok.type |
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return tok |
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def t_LPAR(self, tok): |
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r'\(' |
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self.lasttok = tok.type |
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return tok |
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def t_ID(self, tok): |
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r'[A-Za-z.0-9\-+]+' |
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if self.lasttok == 'EXC': |
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print(tok) |
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raise ParserException(tok, 'Missing parentheses') |
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tok.value = tok.value.strip() |
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val = tok.value.upper() |
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if val in self.reserved: |
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tok.type = val |
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elif self.lasttok == 'WITH': |
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tok.type = 'EXC' |
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self.lasttok = tok.type |
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self.validate(tok) |
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return tok |
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def t_error(self, tok): |
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raise ParserException(tok, 'Invalid token') |
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def p_expr(self, p): |
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'''expr : ID |
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| ID WITH EXC |
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| expr AND expr |
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| expr OR expr |
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| LPAR expr RPAR''' |
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pass |
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def p_error(self, p): |
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if not p: |
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raise ParserException(None, 'Unfinished license expression') |
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else: |
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raise ParserException(p, 'Syntax error') |
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def parse(self, expr): |
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self.lasttok = None |
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self.lastid = None |
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self.parser.parse(expr, lexer = self.lexer) |
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def parse_lines(self, fd, maxlines, fname): |
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self.checked += 1 |
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self.curline = 0 |
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try: |
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for line in fd: |
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line = line.decode(locale.getpreferredencoding(False), errors='ignore') |
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self.curline += 1 |
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if self.curline > maxlines: |
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break |
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self.lines_checked += 1 |
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if line.find("SPDX-License-Identifier:") < 0: |
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continue |
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expr = line.split(':')[1].strip() |
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# Remove trailing comment closure |
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if line.strip().endswith('*/'): |
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expr = expr.rstrip('*/').strip() |
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# Remove trailing xml comment closure |
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if line.strip().endswith('-->'): |
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expr = expr.rstrip('-->').strip() |
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# Special case for SH magic boot code files |
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if line.startswith('LIST \"'): |
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expr = expr.rstrip('\"').strip() |
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self.parse(expr) |
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self.spdx_valid += 1 |
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# |
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# Should we check for more SPDX ids in the same file and |
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# complain if there are any? |
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# |
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break |
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except ParserException as pe: |
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if pe.tok: |
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col = line.find(expr) + pe.tok.lexpos |
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tok = pe.tok.value |
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sys.stdout.write('%s: %d:%d %s: %s\n' %(fname, self.curline, col, pe.txt, tok)) |
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else: |
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sys.stdout.write('%s: %d:0 %s\n' %(fname, self.curline, col, pe.txt)) |
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self.spdx_errors += 1 |
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def scan_git_tree(tree): |
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for el in tree.traverse(): |
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# Exclude stuff which would make pointless noise |
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# FIXME: Put this somewhere more sensible |
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if el.path.startswith("LICENSES"): |
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continue |
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if el.path.find("license-rules.rst") >= 0: |
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continue |
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if not os.path.isfile(el.path): |
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continue |
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with open(el.path, 'rb') as fd: |
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parser.parse_lines(fd, args.maxlines, el.path) |
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def scan_git_subtree(tree, path): |
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for p in path.strip('/').split('/'): |
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tree = tree[p] |
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scan_git_tree(tree) |
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if __name__ == '__main__': |
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ap = ArgumentParser(description='SPDX expression checker') |
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ap.add_argument('path', nargs='*', help='Check path or file. If not given full git tree scan. For stdin use "-"') |
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ap.add_argument('-m', '--maxlines', type=int, default=15, |
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help='Maximum number of lines to scan in a file. Default 15') |
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ap.add_argument('-v', '--verbose', action='store_true', help='Verbose statistics output') |
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args = ap.parse_args() |
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# Sanity check path arguments |
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if '-' in args.path and len(args.path) > 1: |
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sys.stderr.write('stdin input "-" must be the only path argument\n') |
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sys.exit(1) |
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try: |
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# Use git to get the valid license expressions |
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repo = git.Repo(os.getcwd()) |
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assert not repo.bare |
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# Initialize SPDX data |
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spdx = read_spdxdata(repo) |
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# Initialize the parser |
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parser = id_parser(spdx) |
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except SPDXException as se: |
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if se.el: |
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sys.stderr.write('%s: %s\n' %(se.el.path, se.txt)) |
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else: |
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sys.stderr.write('%s\n' %se.txt) |
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sys.exit(1) |
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except Exception as ex: |
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sys.stderr.write('FAIL: %s\n' %ex) |
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sys.stderr.write('%s\n' %traceback.format_exc()) |
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sys.exit(1) |
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try: |
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if len(args.path) and args.path[0] == '-': |
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stdin = os.fdopen(sys.stdin.fileno(), 'rb') |
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parser.parse_lines(stdin, args.maxlines, '-') |
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else: |
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if args.path: |
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for p in args.path: |
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if os.path.isfile(p): |
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parser.parse_lines(open(p, 'rb'), args.maxlines, p) |
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elif os.path.isdir(p): |
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scan_git_subtree(repo.head.reference.commit.tree, p) |
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else: |
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sys.stderr.write('path %s does not exist\n' %p) |
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sys.exit(1) |
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else: |
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# Full git tree scan |
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scan_git_tree(repo.head.commit.tree) |
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if args.verbose: |
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sys.stderr.write('\n') |
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sys.stderr.write('License files: %12d\n' %spdx.license_files) |
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sys.stderr.write('Exception files: %12d\n' %spdx.exception_files) |
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sys.stderr.write('License IDs %12d\n' %len(spdx.licenses)) |
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sys.stderr.write('Exception IDs %12d\n' %len(spdx.exceptions)) |
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sys.stderr.write('\n') |
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sys.stderr.write('Files checked: %12d\n' %parser.checked) |
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sys.stderr.write('Lines checked: %12d\n' %parser.lines_checked) |
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sys.stderr.write('Files with SPDX: %12d\n' %parser.spdx_valid) |
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sys.stderr.write('Files with errors: %12d\n' %parser.spdx_errors) |
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sys.exit(0) |
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except Exception as ex: |
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sys.stderr.write('FAIL: %s\n' %ex) |
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sys.stderr.write('%s\n' %traceback.format_exc()) |
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sys.exit(1)
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