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