check_whence.py

   1 #!/usr/bin/python3
   2
   3 import os, re, sys
   4 from io import open
   5
   6
   7 def list_whence():
   8     with open("WHENCE", encoding="utf-8") as whence:
   9         for line in whence:
  10             match = re.match(r'(?:File|Source):\s*"(.*)"', line)
  11             if match:
  12                 yield match.group(1)
  13                 continue
  14             match = re.match(r"(?:File|Source):\s*(\S*)", line)
  15             if match:
  16                 yield match.group(1)
  17                 continue
  18             match = re.match(
  19                 r"Licen[cs]e: (?:.*\bSee (.*) for details\.?|(\S*))\n", line
  20             )
  21             if match:
  22                 if match.group(1):
  23                     for name in re.split(r", | and ", match.group(1)):
  24                         yield name
  25                     continue
  26                 if match.group(2):
  27                     # Just one word - may or may not be a filename
  28                     if not re.search(
  29                         r"unknown|distributable", match.group(2), re.IGNORECASE
  30                     ):
  31                         yield match.group(2)
  32                         continue
  33
  34
  35 def list_whence_files():
  36     with open("WHENCE", encoding="utf-8") as whence:
  37         for line in whence:
  38             match = re.match(r"File:\s*(.*)", line)
  39             if match:
  40                 yield match.group(1).replace("\ ", " ").replace('"', "")
  41                 continue
  42
  43
  44 def list_links_list():
  45     with open("WHENCE", encoding="utf-8") as whence:
  46         for line in whence:
  47             match = re.match(r"Link:\s*(.*)", line)
  48             if match:
  49                 linkname, target = match.group(1).split("->")
  50
  51                 linkname = linkname.strip().replace("\ ", " ").replace('"', "")
  52                 target = target.strip().replace("\ ", " ").replace('"', "")
  53
  54                 # Link target is relative to the link
  55                 target = os.path.join(os.path.dirname(linkname), target)
  56                 target = os.path.normpath(target)
  57
  58                 yield (linkname, target)
  59                 continue
  60
  61
  62 def list_git():
  63     with os.popen("git ls-files") as git_files:
  64         for line in git_files:
  65             yield line.rstrip("\n")
  66
  67
  68 def main():
  69     ret = 0
  70     whence_list = list(list_whence())
  71     whence_files = list(list_whence_files())
  72     links_list = list(list_links_list())
  73     known_files = set(name for name in whence_list if not name.endswith("/")) | set(
  74         [
  75             ".gitignore",
  76             ".codespell.cfg",
  77             ".pre-commit-config.yaml",
  78             "check_whence.py",
  79             "configure",
  80             "Makefile",
  81             "README.md",
  82             "copy-firmware.sh",
  83             "WHENCE",
  84             "Dockerfile",
  85         ]
  86     )
  87     known_prefixes = set(name for name in whence_list if name.endswith("/"))
  88     git_files = set(list_git())
  89
  90     for name in set(name for name in whence_files if name.endswith("/")):
  91         sys.stderr.write("E: %s listed in WHENCE as File, but is directory\n" % name)
  92         ret = 1
  93
  94     for name in set(fw for fw in whence_files if whence_files.count(fw) > 1):
  95         sys.stderr.write("E: %s listed in WHENCE twice\n" % name)
  96         ret = 1
  97
  98     for name in set(link for link in whence_files if os.path.islink(link)):
  99         sys.stderr.write("E: %s listed in WHENCE as File, but is a symlink\n" % name)
 100         ret = 1
 101
 102     for name in set(link[0] for link in links_list if os.path.islink(link[0])):
 103         sys.stderr.write("E: %s listed in WHENCE as Link, is in tree\n" % name)
 104         ret = 1
 105
 106     for name in sorted(list(known_files - git_files)):
 107         sys.stderr.write("E: %s listed in WHENCE does not exist\n" % name)
 108         ret = 1
 109
 110     # A link can point to another link, or to a file...
 111     valid_targets = set(link[0] for link in links_list) | git_files
 112
 113     # ... or to a directory
 114     for target in set(valid_targets):
 115         dirname = target
 116         while True:
 117             dirname = os.path.dirname(dirname)
 118             if dirname == "":
 119                 break
 120             valid_targets.add(dirname)
 121
 122     for name, target in sorted(links_list):
 123         if target not in valid_targets:
 124             sys.stderr.write(
 125                 "E: target %s of link %s in WHENCE" " does not exist\n" % (target, name)
 126             )
 127             ret = 1
 128
 129     for name in sorted(list(git_files - known_files)):
 130         # Ignore subdirectory changelogs and GPG detached signatures
 131         if name.endswith("/ChangeLog") or (
 132             name.endswith(".asc") and name[:-4] in known_files
 133         ):
 134             continue
 135
 136         # Ignore unknown files in known directories
 137         for prefix in known_prefixes:
 138             if name.startswith(prefix):
 139                 break
 140         else:
 141             sys.stderr.write("E: %s not listed in WHENCE\n" % name)
 142             ret = 1
 143     return ret
 144
 145
 146 if __name__ == "__main__":
 147     sys.exit(main())