3 # Copyright (C) 2020 Free Software Foundation, Inc.
5 # This file is part of GCC.
7 # GCC is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GCC is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GCC; see the file COPYING. If not, write to
19 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20 # Boston, MA 02110-1301, USA.
22 # This script parses a .diff file generated with 'diff -up' or 'diff -cp'
23 # and adds a skeleton ChangeLog file to the file. It does not try to be
24 # too smart when parsing function names, but it produces a reasonable
33 from itertools import takewhile
37 from unidiff import PatchSet
39 pr_regex = re.compile(r'(\/(\/|\*)|[Cc*!])\s+(?P<pr>PR [a-z+-]+\/[0-9]+)')
40 dr_regex = re.compile(r'(\/(\/|\*)|[Cc*!])\s+(?P<dr>DR [0-9]+)')
41 identifier_regex = re.compile(r'^([a-zA-Z0-9_#].*)')
42 comment_regex = re.compile(r'^\/\*')
43 struct_regex = re.compile(r'^(class|struct|union|enum)\s+'
44 r'(GTY\(.*\)\s+)?([a-zA-Z0-9_]+)')
45 macro_regex = re.compile(r'#\s*(define|undef)\s+([a-zA-Z0-9_]+)')
46 super_macro_regex = re.compile(r'^DEF[A-Z0-9_]+\s*\(([a-zA-Z0-9_]+)')
47 fn_regex = re.compile(r'([a-zA-Z_][^()\s]*)\s*\([^*]')
48 template_and_param_regex = re.compile(r'<[^<>]*>')
49 bugzilla_url = 'https://gcc.gnu.org/bugzilla/rest.cgi/bug?id=%s&' \
50 'include_fields=summary'
52 function_extensions = set(['.c', '.cpp', '.C', '.cc', '.h', '.inc', '.def'])
55 Generate ChangeLog template for PATCH.
56 PATCH must be generated using diff(1)'s -up or -cp options
57 (or their equivalent in git).
60 script_folder = os.path.realpath(__file__)
61 gcc_root = os.path.dirname(os.path.dirname(script_folder))
64 def find_changelog(path):
65 folder = os.path.split(path)[0]
67 if os.path.exists(os.path.join(gcc_root, folder, 'ChangeLog')):
69 folder = os.path.dirname(folder)
72 raise AssertionError()
75 def extract_function_name(line):
76 if comment_regex.match(line):
78 m = struct_regex.search(line)
81 return m.group(1) + ' ' + m.group(3)
82 m = macro_regex.search(line)
86 m = super_macro_regex.search(line)
90 m = fn_regex.search(line)
92 # Discard template and function parameters.
94 fn = re.sub(template_and_param_regex, '', fn)
99 def try_add_function(functions, line):
100 fn = extract_function_name(line)
101 if fn and fn not in functions:
106 def sort_changelog_files(changed_file):
107 return (changed_file.is_added_file, changed_file.is_removed_file)
110 def get_pr_titles(prs):
113 id = pr.split('/')[-1]
114 r = requests.get(bugzilla_url % id)
115 bugs = r.json()['bugs']
117 output += '%s - %s\n' % (pr, bugs[0]['summary'])
124 def generate_changelog(data, no_functions=False, fill_pr_titles=False):
129 diff = PatchSet(data)
132 changelog = find_changelog(file.path)
133 if changelog not in changelogs:
134 changelogs[changelog] = []
135 changelog_list.append(changelog)
136 changelogs[changelog].append(file)
138 # Extract PR entries from newly added tests
139 if 'testsuite' in file.path and file.is_added_file:
140 for line in list(file)[0]:
141 m = pr_regex.search(line.value)
147 m = dr_regex.search(line.value)
156 out += get_pr_titles(prs)
158 # sort ChangeLog so that 'testsuite' is at the end
159 for changelog in sorted(changelog_list, key=lambda x: 'testsuite' in x):
160 files = changelogs[changelog]
161 out += '%s:\n' % os.path.join(changelog, 'ChangeLog')
165 # new and deleted files should be at the end
166 for file in sorted(files, key=sort_changelog_files):
167 assert file.path.startswith(changelog)
168 in_tests = 'testsuite' in changelog or 'testsuite' in file.path
169 relative_path = file.path[len(changelog):].lstrip('/')
171 if file.is_added_file:
172 msg = 'New test' if in_tests else 'New file'
173 out += '\t* %s: %s.\n' % (relative_path, msg)
174 elif file.is_removed_file:
175 out += '\t* %s: Removed.\n' % (relative_path)
176 elif hasattr(file, 'is_rename') and file.is_rename:
177 out += '\t* %s: Moved to...\n' % (relative_path)
178 new_path = file.target_file[2:]
179 # A file can be theoretically moved to a location that
180 # belongs to a different ChangeLog. Let user fix it.
181 if new_path.startswith(changelog):
182 new_path = new_path[len(changelog):].lstrip('/')
183 out += '\t* %s: ...here.\n' % (new_path)
187 # Do not add function names for testsuite files
188 extension = os.path.splitext(relative_path)[1]
189 if not in_tests and extension in function_extensions:
191 modified_visited = False
194 m = identifier_regex.match(line.value)
195 if line.is_added or line.is_removed:
196 if not line.value.strip():
198 modified_visited = True
199 if m and try_add_function(functions,
203 elif line.is_context:
204 if last_fn and modified_visited:
205 try_add_function(functions, last_fn)
207 modified_visited = False
211 modified_visited = False
213 try_add_function(functions,
216 out += '\t* %s (%s):\n' % (relative_path, functions[0])
217 for fn in functions[1:]:
218 out += '\t(%s):\n' % fn
220 out += '\t* %s:\n' % relative_path
225 if __name__ == '__main__':
226 parser = argparse.ArgumentParser(description=help_message)
227 parser.add_argument('input', nargs='?',
228 help='Patch file (or missing, read standard input)')
229 parser.add_argument('-s', '--no-functions', action='store_true',
230 help='Do not generate function names in ChangeLogs')
231 parser.add_argument('-p', '--fill-up-bug-titles', action='store_true',
232 help='Download title of mentioned PRs')
233 parser.add_argument('-c', '--changelog',
234 help='Append the ChangeLog to a git commit message '
236 args = parser.parse_args()
237 if args.input == '-':
240 input = open(args.input) if args.input else sys.stdin
242 output = generate_changelog(data, args.no_functions,
243 args.fill_up_bug_titles)
245 lines = open(args.changelog).read().split('\n')
246 start = list(takewhile(lambda l: not l.startswith('#'), lines))
247 end = lines[len(start):]
248 with open(args.changelog, 'w') as f:
254 # append 2 empty lines
256 f.write('\n'.join(start))
259 f.write('\n'.join(end))
261 print(output, end='')