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-rwxr-xr-xscripts/spdxcheck.py284
1 files changed, 284 insertions, 0 deletions
diff --git a/scripts/spdxcheck.py b/scripts/spdxcheck.py
new file mode 100755
index 0000000000000..7deaef297f529
--- /dev/null
+++ b/scripts/spdxcheck.py
@@ -0,0 +1,284 @@
+#!/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 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.heads.master.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 not self.spdx.exceptions.has_key(id):
+ 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:
+ 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 el.path == 'scripts/checkpatch.pl':
+ continue
+ if not os.path.isfile(el.path):
+ continue
+ parser.parse_lines(open(el.path), 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] == '-':
+ parser.parse_lines(sys.stdin, args.maxlines, '-')
+ else:
+ if args.path:
+ for p in args.path:
+ if os.path.isfile(p):
+ parser.parse_lines(open(p), 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)
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-21 18:40:53 +0000