git.bitcoin.ninja Git - rust-lightning/blob - ci/check-cfg-flags.py

   1 #!/usr/bin/env python3
   2 # Rust is fairly relaxed in checking the validity of arguments passed to #[cfg].
   3 # While it should probably be more strict when checking features, it cannot be
   4 # strict when checking loose cfg tags, because those can be anything and are
   5 # simply passed to rustc via unconstrained arguments.
   6 #
   7 # Thus, we do it for rustc manually, but scanning all our source and checking
   8 # that all our cfg tags match a known cfg tag.
   9 import sys, glob, re
  10
  11 def check_feature(feature):
  12     if feature == "std":
  13         pass
  14     elif feature == "no-std":
  15         pass
  16     elif feature == "possiblyrandom":
  17         pass
  18     elif feature == "getrandom":
  19         pass
  20     elif feature == "hashbrown":
  21         pass
  22     elif feature == "backtrace":
  23         pass
  24     elif feature == "grind_signatures":
  25         pass
  26     elif feature == "unsafe_revoked_tx_signing":
  27         pass
  28     elif feature == "futures":
  29         pass
  30     elif feature == "tokio":
  31         pass
  32     elif feature == "rest-client":
  33         pass
  34     elif feature == "rpc-client":
  35         pass
  36     elif feature == "serde":
  37         pass
  38     elif feature == "esplora-blocking":
  39         pass
  40     elif feature == "esplora-async":
  41         pass
  42     elif feature == "async-interface":
  43         pass
  44     elif feature == "electrum":
  45         pass
  46     elif feature == "time":
  47         pass
  48     elif feature == "_test_utils":
  49         pass
  50     elif feature == "_test_vectors":
  51         pass
  52     elif feature == "afl":
  53         pass
  54     elif feature == "honggfuzz":
  55         pass
  56     elif feature == "libfuzzer_fuzz":
  57         pass
  58     elif feature == "stdin_fuzz":
  59         pass
  60     elif feature == "max_level_off":
  61         pass
  62     elif feature == "max_level_error":
  63         pass
  64     elif feature == "max_level_warn":
  65         pass
  66     elif feature == "max_level_info":
  67         pass
  68     elif feature == "max_level_debug":
  69         pass
  70     elif feature == "max_level_trace":
  71         pass
  72     else:
  73         print("Bad feature: " + feature)
  74         assert False
  75
  76 def check_target_os(os):
  77     if os == "windows":
  78         pass
  79     else:
  80         assert False
  81
  82 def check_cfg_tag(cfg):
  83     if cfg == "fuzzing":
  84         pass
  85     elif cfg == "test":
  86         pass
  87     elif cfg == "debug_assertions":
  88         pass
  89     elif cfg == "c_bindings":
  90         pass
  91     elif cfg == "ldk_bench":
  92         pass
  93     elif cfg == "taproot":
  94         pass
  95     elif cfg == "async_signing":
  96         pass
  97     elif cfg == "require_route_graph_test":
  98         pass
  99     elif cfg == "dual_funding":
 100         pass
 101     else:
 102         print("Bad cfg tag: " + cfg)
 103         assert False
 104
 105 def check_cfg_args(cfg):
 106     if cfg.startswith("all(") or cfg.startswith("any(") or cfg.startswith("not("):
 107         brackets = 1
 108         pos = 4
 109         while pos < len(cfg):
 110             if cfg[pos] == "(":
 111                 brackets += 1
 112             elif cfg[pos] == ")":
 113                 brackets -= 1
 114                 if brackets == 0:
 115                     check_cfg_args(cfg[4:pos])
 116                     if pos + 1 != len(cfg):
 117                         assert cfg[pos + 1] == ","
 118                         check_cfg_args(cfg[pos + 2:].strip())
 119                     return
 120             pos += 1
 121         assert False
 122         assert(cfg.endswith(")"))
 123         check_cfg_args(cfg[4:len(cfg)-1])
 124     else:
 125         parts = [part.strip() for part in cfg.split(",", 1)]
 126         if len(parts) > 1:
 127             for part in parts:
 128                 check_cfg_args(part)
 129         elif cfg.startswith("feature") or cfg.startswith("target_os") or cfg.startswith("target_pointer_width"):
 130             arg = cfg
 131             if cfg.startswith("feature"):
 132                 arg = arg[7:].strip()
 133             elif cfg.startswith("target_os"):
 134                 arg = arg[9:].strip()
 135             else:
 136                 arg = arg[20:].strip()
 137             assert arg.startswith("=")
 138             arg = arg[1:].strip()
 139             assert arg.startswith("\"")
 140             assert arg.endswith("\"")
 141             arg = arg[1:len(arg)-1]
 142             assert not "\"" in arg
 143             if cfg.startswith("feature"):
 144                 check_feature(arg)
 145             elif cfg.startswith("target_os"):
 146                 check_target_os(arg)
 147             else:
 148                 assert arg == "32" or arg == "64"
 149         else:
 150             check_cfg_tag(cfg.strip())
 151
 152 cfg_regex = re.compile("#\[cfg\((.*)\)\]")
 153 for path in glob.glob(sys.path[0] + "/../**/*.rs", recursive = True):
 154     with open(path, "r") as file:
 155         while True:
 156             line = file.readline()
 157             if not line:
 158                 break
 159             if "#[cfg(" in line:
 160                 if not line.strip().startswith("//"):
 161                     cfg_part = cfg_regex.match(line.strip()).group(1)
 162                     check_cfg_args(cfg_part)