Mercurial > hg
annotate contrib/import-checker.py @ 33645:fef451e3d9ca stable
Added tag 4.2.3 for changeset 943c91326b23
author | Augie Fackler <raf@durin42.com> |
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date | Thu, 10 Aug 2017 14:14:48 -0400 |
parents | 74eecb93c617 |
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1 #!/usr/bin/env python |
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2 |
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3 from __future__ import absolute_import, print_function |
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4 |
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6 import collections |
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8 import re |
20036 | 9 import sys |
10 | |
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11 # Import a minimal set of stdlib modules needed for list_stdlib_modules() |
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12 # to work when run from a virtualenv. The modules were chosen empirically |
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13 # so that the return value matches the return value without virtualenv. |
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14 if True: # disable lexical sorting checks |
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15 import BaseHTTPServer |
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16 import zlib |
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17 |
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18 # Whitelist of modules that symbols can be directly imported from. |
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19 allowsymbolimports = ( |
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20 '__future__', |
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21 'mercurial.hgweb.common', |
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22 'mercurial.hgweb.request', |
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23 'mercurial.i18n', |
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24 'mercurial.node', |
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25 ) |
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26 |
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27 # Modules that must be aliased because they are commonly confused with |
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28 # common variables and can create aliasing and readability issues. |
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29 requirealias = { |
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30 'ui': 'uimod', |
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31 } |
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32 |
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33 def usingabsolute(root): |
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34 """Whether absolute imports are being used.""" |
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35 if sys.version_info[0] >= 3: |
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36 return True |
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37 |
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38 for node in ast.walk(root): |
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39 if isinstance(node, ast.ImportFrom): |
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40 if node.module == '__future__': |
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41 for n in node.names: |
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42 if n.name == 'absolute_import': |
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43 return True |
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44 |
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45 return False |
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46 |
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47 def walklocal(root): |
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48 """Recursively yield all descendant nodes but not in a different scope""" |
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49 todo = collections.deque(ast.iter_child_nodes(root)) |
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50 yield root, False |
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51 while todo: |
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52 node = todo.popleft() |
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53 newscope = isinstance(node, ast.FunctionDef) |
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54 if not newscope: |
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55 todo.extend(ast.iter_child_nodes(node)) |
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56 yield node, newscope |
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57 |
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58 def dotted_name_of_path(path, trimpure=False): |
20036 | 59 """Given a relative path to a source file, return its dotted module name. |
60 | |
61 >>> dotted_name_of_path('mercurial/error.py') | |
62 'mercurial.error' | |
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63 >>> dotted_name_of_path('mercurial/pure/parsers.py', trimpure=True) |
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64 'mercurial.parsers' |
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65 >>> dotted_name_of_path('zlibmodule.so') |
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66 'zlib' |
20036 | 67 """ |
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68 parts = path.replace(os.sep, '/').split('/') |
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69 parts[-1] = parts[-1].split('.', 1)[0] # remove .py and .so and .ARCH.so |
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70 if parts[-1].endswith('module'): |
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71 parts[-1] = parts[-1][:-6] |
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72 if trimpure: |
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73 return '.'.join(p for p in parts if p != 'pure') |
20036 | 74 return '.'.join(parts) |
75 | |
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76 def fromlocalfunc(modulename, localmods): |
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77 """Get a function to examine which locally defined module the |
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78 target source imports via a specified name. |
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79 |
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80 `modulename` is an `dotted_name_of_path()`-ed source file path, |
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81 which may have `.__init__` at the end of it, of the target source. |
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82 |
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83 `localmods` is a dict (or set), of which key is an absolute |
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84 `dotted_name_of_path()`-ed source file path of locally defined (= |
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85 Mercurial specific) modules. |
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86 |
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87 This function assumes that module names not existing in |
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88 `localmods` are from the Python standard library. |
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89 |
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90 This function returns the function, which takes `name` argument, |
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91 and returns `(absname, dottedpath, hassubmod)` tuple if `name` |
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92 matches against locally defined module. Otherwise, it returns |
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93 False. |
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94 |
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95 It is assumed that `name` doesn't have `.__init__`. |
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96 |
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97 `absname` is an absolute module name of specified `name` |
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98 (e.g. "hgext.convert"). This can be used to compose prefix for sub |
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99 modules or so. |
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100 |
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101 `dottedpath` is a `dotted_name_of_path()`-ed source file path |
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102 (e.g. "hgext.convert.__init__") of `name`. This is used to look |
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103 module up in `localmods` again. |
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104 |
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105 `hassubmod` is whether it may have sub modules under it (for |
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106 convenient, even though this is also equivalent to "absname != |
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107 dottednpath") |
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108 |
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109 >>> localmods = {'foo.__init__': True, 'foo.foo1': True, |
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110 ... 'foo.bar.__init__': True, 'foo.bar.bar1': True, |
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111 ... 'baz.__init__': True, 'baz.baz1': True } |
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112 >>> fromlocal = fromlocalfunc('foo.xxx', localmods) |
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113 >>> # relative |
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114 >>> fromlocal('foo1') |
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115 ('foo.foo1', 'foo.foo1', False) |
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116 >>> fromlocal('bar') |
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117 ('foo.bar', 'foo.bar.__init__', True) |
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118 >>> fromlocal('bar.bar1') |
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119 ('foo.bar.bar1', 'foo.bar.bar1', False) |
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120 >>> # absolute |
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121 >>> fromlocal('baz') |
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122 ('baz', 'baz.__init__', True) |
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123 >>> fromlocal('baz.baz1') |
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124 ('baz.baz1', 'baz.baz1', False) |
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125 >>> # unknown = maybe standard library |
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126 >>> fromlocal('os') |
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127 False |
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128 >>> fromlocal(None, 1) |
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129 ('foo', 'foo.__init__', True) |
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130 >>> fromlocal('foo1', 1) |
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131 ('foo.foo1', 'foo.foo1', False) |
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132 >>> fromlocal2 = fromlocalfunc('foo.xxx.yyy', localmods) |
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133 >>> fromlocal2(None, 2) |
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134 ('foo', 'foo.__init__', True) |
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135 >>> fromlocal2('bar2', 1) |
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136 False |
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137 >>> fromlocal2('bar', 2) |
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138 ('foo.bar', 'foo.bar.__init__', True) |
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139 """ |
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140 prefix = '.'.join(modulename.split('.')[:-1]) |
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141 if prefix: |
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142 prefix += '.' |
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143 def fromlocal(name, level=0): |
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144 # name is false value when relative imports are used. |
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145 if not name: |
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146 # If relative imports are used, level must not be absolute. |
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147 assert level > 0 |
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148 candidates = ['.'.join(modulename.split('.')[:-level])] |
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149 else: |
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150 if not level: |
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151 # Check relative name first. |
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152 candidates = [prefix + name, name] |
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153 else: |
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154 candidates = ['.'.join(modulename.split('.')[:-level]) + |
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155 '.' + name] |
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156 |
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157 for n in candidates: |
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158 if n in localmods: |
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159 return (n, n, False) |
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160 dottedpath = n + '.__init__' |
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161 if dottedpath in localmods: |
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162 return (n, dottedpath, True) |
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163 return False |
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164 return fromlocal |
20036 | 165 |
166 def list_stdlib_modules(): | |
167 """List the modules present in the stdlib. | |
168 | |
169 >>> mods = set(list_stdlib_modules()) | |
170 >>> 'BaseHTTPServer' in mods | |
171 True | |
172 | |
173 os.path isn't really a module, so it's missing: | |
174 | |
175 >>> 'os.path' in mods | |
176 False | |
177 | |
178 sys requires special treatment, because it's baked into the | |
179 interpreter, but it should still appear: | |
180 | |
181 >>> 'sys' in mods | |
182 True | |
183 | |
184 >>> 'collections' in mods | |
185 True | |
186 | |
187 >>> 'cStringIO' in mods | |
188 True | |
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189 |
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190 >>> 'cffi' in mods |
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191 True |
20036 | 192 """ |
193 for m in sys.builtin_module_names: | |
194 yield m | |
195 # These modules only exist on windows, but we should always | |
196 # consider them stdlib. | |
197 for m in ['msvcrt', '_winreg']: | |
198 yield m | |
199 yield 'builtins' # python3 only | |
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200 for m in 'fcntl', 'grp', 'pwd', 'termios': # Unix only |
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201 yield m |
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202 for m in 'cPickle', 'datetime': # in Python (not C) on PyPy |
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203 yield m |
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204 for m in ['cffi']: |
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205 yield m |
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206 stdlib_prefixes = set([sys.prefix, sys.exec_prefix]) |
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207 # We need to supplement the list of prefixes for the search to work |
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208 # when run from within a virtualenv. |
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209 for mod in (BaseHTTPServer, zlib): |
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210 try: |
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211 # Not all module objects have a __file__ attribute. |
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212 filename = mod.__file__ |
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213 except AttributeError: |
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214 continue |
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215 dirname = os.path.dirname(filename) |
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216 for prefix in stdlib_prefixes: |
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217 if dirname.startswith(prefix): |
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218 # Then this directory is redundant. |
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219 break |
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220 else: |
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221 stdlib_prefixes.add(dirname) |
20036 | 222 for libpath in sys.path: |
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223 # We want to walk everything in sys.path that starts with |
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224 # something in stdlib_prefixes. |
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225 if not any(libpath.startswith(p) for p in stdlib_prefixes): |
20036 | 226 continue |
227 for top, dirs, files in os.walk(libpath): | |
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228 for i, d in reversed(list(enumerate(dirs))): |
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229 if (not os.path.exists(os.path.join(top, d, '__init__.py')) |
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230 or top == libpath and d in ('hgext', 'mercurial')): |
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231 del dirs[i] |
20036 | 232 for name in files: |
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233 if not name.endswith(('.py', '.so', '.pyc', '.pyo', '.pyd')): |
20036 | 234 continue |
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235 if name.startswith('__init__.py'): |
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236 full_path = top |
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237 else: |
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238 full_path = os.path.join(top, name) |
20036 | 239 rel_path = full_path[len(libpath) + 1:] |
240 mod = dotted_name_of_path(rel_path) | |
241 yield mod | |
242 | |
243 stdlib_modules = set(list_stdlib_modules()) | |
244 | |
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245 def imported_modules(source, modulename, f, localmods, ignore_nested=False): |
20036 | 246 """Given the source of a file as a string, yield the names |
247 imported by that file. | |
248 | |
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249 Args: |
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250 source: The python source to examine as a string. |
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251 modulename: of specified python source (may have `__init__`) |
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252 localmods: dict of locally defined module names (may have `__init__`) |
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253 ignore_nested: If true, import statements that do not start in |
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254 column zero will be ignored. |
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255 |
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256 Returns: |
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257 A list of absolute module names imported by the given source. |
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258 |
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259 >>> f = 'foo/xxx.py' |
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260 >>> modulename = 'foo.xxx' |
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261 >>> localmods = {'foo.__init__': True, |
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262 ... 'foo.foo1': True, 'foo.foo2': True, |
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263 ... 'foo.bar.__init__': True, 'foo.bar.bar1': True, |
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264 ... 'baz.__init__': True, 'baz.baz1': True } |
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265 >>> # standard library (= not locally defined ones) |
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266 >>> sorted(imported_modules( |
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267 ... 'from stdlib1 import foo, bar; import stdlib2', |
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268 ... modulename, f, localmods)) |
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269 [] |
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270 >>> # relative importing |
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271 >>> sorted(imported_modules( |
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272 ... 'import foo1; from bar import bar1', |
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273 ... modulename, f, localmods)) |
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274 ['foo.bar.bar1', 'foo.foo1'] |
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275 >>> sorted(imported_modules( |
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276 ... 'from bar.bar1 import name1, name2, name3', |
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277 ... modulename, f, localmods)) |
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278 ['foo.bar.bar1'] |
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279 >>> # absolute importing |
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280 >>> sorted(imported_modules( |
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281 ... 'from baz import baz1, name1', |
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282 ... modulename, f, localmods)) |
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283 ['baz.__init__', 'baz.baz1'] |
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284 >>> # mixed importing, even though it shouldn't be recommended |
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285 >>> sorted(imported_modules( |
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286 ... 'import stdlib, foo1, baz', |
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287 ... modulename, f, localmods)) |
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288 ['baz.__init__', 'foo.foo1'] |
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289 >>> # ignore_nested |
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290 >>> sorted(imported_modules( |
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291 ... '''import foo |
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292 ... def wat(): |
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293 ... import bar |
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294 ... ''', modulename, f, localmods)) |
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295 ['foo.__init__', 'foo.bar.__init__'] |
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296 >>> sorted(imported_modules( |
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297 ... '''import foo |
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298 ... def wat(): |
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299 ... import bar |
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300 ... ''', modulename, f, localmods, ignore_nested=True)) |
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301 ['foo.__init__'] |
20036 | 302 """ |
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303 fromlocal = fromlocalfunc(modulename, localmods) |
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304 for node in ast.walk(ast.parse(source, f)): |
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305 if ignore_nested and getattr(node, 'col_offset', 0) > 0: |
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306 continue |
20036 | 307 if isinstance(node, ast.Import): |
308 for n in node.names: | |
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309 found = fromlocal(n.name) |
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310 if not found: |
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311 # this should import standard library |
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312 continue |
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313 yield found[1] |
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315 found = fromlocal(node.module, node.level) |
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316 if not found: |
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317 # this should import standard library |
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318 continue |
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319 |
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320 absname, dottedpath, hassubmod = found |
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321 if not hassubmod: |
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322 # "dottedpath" is not a package; must be imported |
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323 yield dottedpath |
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324 # examination of "node.names" should be redundant |
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325 # e.g.: from mercurial.node import nullid, nullrev |
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326 continue |
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327 |
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328 modnotfound = False |
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329 prefix = absname + '.' |
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331 found = fromlocal(prefix + n.name) |
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332 if not found: |
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333 # this should be a function or a property of "node.module" |
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334 modnotfound = True |
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335 continue |
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336 yield found[1] |
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337 if modnotfound: |
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338 # "dottedpath" is a package, but imported because of non-module |
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339 # lookup |
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340 yield dottedpath |
20036 | 341 |
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342 def verify_import_convention(module, source, localmods): |
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343 """Verify imports match our established coding convention. |
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344 |
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345 We have 2 conventions: legacy and modern. The modern convention is in |
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346 effect when using absolute imports. |
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347 |
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348 The legacy convention only looks for mixed imports. The modern convention |
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349 is much more thorough. |
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350 """ |
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351 root = ast.parse(source) |
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352 absolute = usingabsolute(root) |
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353 |
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354 if absolute: |
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355 return verify_modern_convention(module, root, localmods) |
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356 else: |
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357 return verify_stdlib_on_own_line(root) |
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358 |
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359 def verify_modern_convention(module, root, localmods, root_col_offset=0): |
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360 """Verify a file conforms to the modern import convention rules. |
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361 |
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362 The rules of the modern convention are: |
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363 |
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364 * Ordering is stdlib followed by local imports. Each group is lexically |
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365 sorted. |
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366 * Importing multiple modules via "import X, Y" is not allowed: use |
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367 separate import statements. |
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368 * Importing multiple modules via "from X import ..." is allowed if using |
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369 parenthesis and one entry per line. |
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370 * Only 1 relative import statement per import level ("from .", "from ..") |
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371 is allowed. |
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372 * Relative imports from higher levels must occur before lower levels. e.g. |
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373 "from .." must be before "from .". |
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374 * Imports from peer packages should use relative import (e.g. do not |
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375 "import mercurial.foo" from a "mercurial.*" module). |
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376 * Symbols can only be imported from specific modules (see |
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377 `allowsymbolimports`). For other modules, first import the module then |
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378 assign the symbol to a module-level variable. In addition, these imports |
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379 must be performed before other local imports. This rule only |
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380 applies to import statements outside of any blocks. |
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381 * Relative imports from the standard library are not allowed. |
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382 * Certain modules must be aliased to alternate names to avoid aliasing |
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383 and readability problems. See `requirealias`. |
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384 """ |
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385 topmodule = module.split('.')[0] |
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386 fromlocal = fromlocalfunc(module, localmods) |
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387 |
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388 # Whether a local/non-stdlib import has been performed. |
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389 seenlocal = None |
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390 # Whether a local/non-stdlib, non-symbol import has been seen. |
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391 seennonsymbollocal = False |
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392 # The last name to be imported (for sorting). |
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393 lastname = None |
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394 laststdlib = None |
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395 # Relative import levels encountered so far. |
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396 seenlevels = set() |
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397 |
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398 for node, newscope in walklocal(root): |
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399 def msg(fmt, *args): |
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400 return (fmt % args, node.lineno) |
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401 if newscope: |
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402 # Check for local imports in function |
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403 for r in verify_modern_convention(module, node, localmods, |
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404 node.col_offset + 4): |
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405 yield r |
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406 elif isinstance(node, ast.Import): |
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407 # Disallow "import foo, bar" and require separate imports |
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408 # for each module. |
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409 if len(node.names) > 1: |
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410 yield msg('multiple imported names: %s', |
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411 ', '.join(n.name for n in node.names)) |
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412 |
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413 name = node.names[0].name |
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414 asname = node.names[0].asname |
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415 |
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416 stdlib = name in stdlib_modules |
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417 |
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418 # Ignore sorting rules on imports inside blocks. |
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419 if node.col_offset == root_col_offset: |
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420 if lastname and name < lastname and laststdlib == stdlib: |
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421 yield msg('imports not lexically sorted: %s < %s', |
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422 name, lastname) |
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423 |
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424 lastname = name |
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425 laststdlib = stdlib |
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426 |
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427 # stdlib imports should be before local imports. |
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428 if stdlib and seenlocal and node.col_offset == root_col_offset: |
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429 yield msg('stdlib import "%s" follows local import: %s', |
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430 name, seenlocal) |
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431 |
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432 if not stdlib: |
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433 seenlocal = name |
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434 |
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435 # Import of sibling modules should use relative imports. |
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436 topname = name.split('.')[0] |
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437 if topname == topmodule: |
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438 yield msg('import should be relative: %s', name) |
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439 |
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440 if name in requirealias and asname != requirealias[name]: |
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441 yield msg('%s module must be "as" aliased to %s', |
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442 name, requirealias[name]) |
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443 |
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444 elif isinstance(node, ast.ImportFrom): |
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445 # Resolve the full imported module name. |
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446 if node.level > 0: |
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447 fullname = '.'.join(module.split('.')[:-node.level]) |
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448 if node.module: |
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449 fullname += '.%s' % node.module |
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450 else: |
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451 assert node.module |
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452 fullname = node.module |
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453 |
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454 topname = fullname.split('.')[0] |
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455 if topname == topmodule: |
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456 yield msg('import should be relative: %s', fullname) |
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457 |
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458 # __future__ is special since it needs to come first and use |
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459 # symbol import. |
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460 if fullname != '__future__': |
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461 if not fullname or fullname in stdlib_modules: |
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462 yield msg('relative import of stdlib module') |
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463 else: |
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464 seenlocal = fullname |
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465 |
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466 # Direct symbol import is only allowed from certain modules and |
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467 # must occur before non-symbol imports. |
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468 found = fromlocal(node.module, node.level) |
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469 if found and found[2]: # node.module is a package |
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470 prefix = found[0] + '.' |
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471 symbols = [n.name for n in node.names |
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472 if not fromlocal(prefix + n.name)] |
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473 else: |
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474 symbols = [n.name for n in node.names] |
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475 if node.module and node.col_offset == root_col_offset: |
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476 if symbols and fullname not in allowsymbolimports: |
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477 yield msg('direct symbol import %s from %s', |
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478 ', '.join(symbols), fullname) |
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479 |
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480 if symbols and seennonsymbollocal: |
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481 yield msg('symbol import follows non-symbol import: %s', |
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482 fullname) |
29208
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483 if not symbols and fullname not in stdlib_modules: |
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484 seennonsymbollocal = True |
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485 |
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486 if not node.module: |
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487 assert node.level |
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488 |
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489 # Only allow 1 group per level. |
26965
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490 if (node.level in seenlevels |
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491 and node.col_offset == root_col_offset): |
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492 yield msg('multiple "from %s import" statements', |
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493 '.' * node.level) |
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494 |
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495 # Higher-level groups come before lower-level groups. |
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496 if any(node.level > l for l in seenlevels): |
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497 yield msg('higher-level import should come first: %s', |
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498 fullname) |
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499 |
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500 seenlevels.add(node.level) |
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501 |
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502 # Entries in "from .X import ( ... )" lists must be lexically |
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503 # sorted. |
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504 lastentryname = None |
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505 |
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506 for n in node.names: |
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507 if lastentryname and n.name < lastentryname: |
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508 yield msg('imports from %s not lexically sorted: %s < %s', |
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509 fullname, n.name, lastentryname) |
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510 |
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511 lastentryname = n.name |
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512 |
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513 if n.name in requirealias and n.asname != requirealias[n.name]: |
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514 yield msg('%s from %s must be "as" aliased to %s', |
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515 n.name, fullname, requirealias[n.name]) |
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516 |
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517 def verify_stdlib_on_own_line(root): |
20036 | 518 """Given some python source, verify that stdlib imports are done |
519 in separate statements from relative local module imports. | |
520 | |
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521 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, foo'))) |
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522 [('mixed imports\\n stdlib: sys\\n relative: foo', 1)] |
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523 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, os'))) |
20036 | 524 [] |
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525 >>> list(verify_stdlib_on_own_line(ast.parse('import foo, bar'))) |
20036 | 526 [] |
527 """ | |
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528 for node in ast.walk(root): |
20036 | 529 if isinstance(node, ast.Import): |
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530 from_stdlib = {False: [], True: []} |
20036 | 531 for n in node.names: |
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532 from_stdlib[n.name in stdlib_modules].append(n.name) |
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533 if from_stdlib[True] and from_stdlib[False]: |
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534 yield ('mixed imports\n stdlib: %s\n relative: %s' % |
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535 (', '.join(sorted(from_stdlib[True])), |
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536 ', '.join(sorted(from_stdlib[False]))), node.lineno) |
20036 | 537 |
538 class CircularImport(Exception): | |
539 pass | |
540 | |
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541 def checkmod(mod, imports): |
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542 shortest = {} |
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543 visit = [[mod]] |
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544 while visit: |
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545 path = visit.pop(0) |
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546 for i in sorted(imports.get(path[-1], [])): |
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547 if len(path) < shortest.get(i, 1000): |
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548 shortest[i] = len(path) |
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549 if i in path: |
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550 if i == path[0]: |
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551 raise CircularImport(path) |
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552 continue |
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553 visit.append(path + [i]) |
20036 | 554 |
20038
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555 def rotatecycle(cycle): |
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556 """arrange a cycle so that the lexicographically first module listed first |
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557 |
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558 >>> rotatecycle(['foo', 'bar']) |
20038
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559 ['bar', 'foo', 'bar'] |
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560 """ |
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561 lowest = min(cycle) |
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562 idx = cycle.index(lowest) |
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563 return cycle[idx:] + cycle[:idx] + [lowest] |
20036 | 564 |
565 def find_cycles(imports): | |
566 """Find cycles in an already-loaded import graph. | |
567 | |
25175
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568 All module names recorded in `imports` should be absolute one. |
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569 |
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570 >>> from __future__ import print_function |
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571 >>> imports = {'top.foo': ['top.bar', 'os.path', 'top.qux'], |
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572 ... 'top.bar': ['top.baz', 'sys'], |
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573 ... 'top.baz': ['top.foo'], |
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574 ... 'top.qux': ['top.foo']} |
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575 >>> print('\\n'.join(sorted(find_cycles(imports)))) |
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576 top.bar -> top.baz -> top.foo -> top.bar |
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577 top.foo -> top.qux -> top.foo |
20036 | 578 """ |
24491
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579 cycles = set() |
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580 for mod in sorted(imports.keys()): |
20036 | 581 try: |
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582 checkmod(mod, imports) |
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583 except CircularImport as e: |
20036 | 584 cycle = e.args[0] |
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585 cycles.add(" -> ".join(rotatecycle(cycle))) |
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586 return cycles |
20036 | 587 |
588 def _cycle_sortkey(c): | |
589 return len(c), c | |
590 | |
28922
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591 def embedded(f, modname, src): |
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592 """Extract embedded python code |
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593 |
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594 >>> def test(fn, lines): |
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595 ... for s, m, f, l in embedded(fn, "example", lines): |
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596 ... print("%s %s %s" % (m, f, l)) |
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597 ... print(repr(s)) |
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598 >>> lines = [ |
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599 ... 'comment', |
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600 ... ' >>> from __future__ import print_function', |
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601 ... " >>> ' multiline", |
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602 ... " ... string'", |
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603 ... ' ', |
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604 ... 'comment', |
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|
605 ... ' $ cat > foo.py <<EOF', |
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606 ... ' > from __future__ import print_function', |
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607 ... ' > EOF', |
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608 ... ] |
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|
609 >>> test("example.t", lines) |
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610 example[2] doctest.py 2 |
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611 "from __future__ import print_function\\n' multiline\\nstring'\\n" |
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612 example[7] foo.py 7 |
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613 'from __future__ import print_function\\n' |
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614 """ |
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615 inlinepython = 0 |
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616 shpython = 0 |
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617 script = [] |
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618 prefix = 6 |
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619 t = '' |
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620 n = 0 |
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621 for l in src: |
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622 n += 1 |
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623 if not l.endswith(b'\n'): |
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624 l += b'\n' |
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625 if l.startswith(b' >>> '): # python inlines |
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626 if shpython: |
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627 print("%s:%d: Parse Error" % (f, n)) |
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628 if not inlinepython: |
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629 # We've just entered a Python block. |
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630 inlinepython = n |
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631 t = 'doctest.py' |
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632 script.append(l[prefix:]) |
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633 continue |
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634 if l.startswith(b' ... '): # python inlines |
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635 script.append(l[prefix:]) |
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636 continue |
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637 cat = re.search(r"\$ \s*cat\s*>\s*(\S+\.py)\s*<<\s*EOF", l) |
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638 if cat: |
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639 if inlinepython: |
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640 yield ''.join(script), ("%s[%d]" % |
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641 (modname, inlinepython)), t, inlinepython |
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642 script = [] |
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643 inlinepython = 0 |
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644 shpython = n |
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645 t = cat.group(1) |
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646 continue |
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647 if shpython and l.startswith(b' > '): # sh continuation |
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648 if l == b' > EOF\n': |
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649 yield ''.join(script), ("%s[%d]" % |
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650 (modname, shpython)), t, shpython |
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651 script = [] |
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652 shpython = 0 |
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653 else: |
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654 script.append(l[4:]) |
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655 continue |
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656 if inlinepython and l == b' \n': |
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657 yield ''.join(script), ("%s[%d]" % |
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658 (modname, inlinepython)), t, inlinepython |
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659 script = [] |
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660 inlinepython = 0 |
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661 continue |
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662 |
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663 def sources(f, modname): |
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664 """Yields possibly multiple sources from a filepath |
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665 |
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666 input: filepath, modulename |
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667 yields: script(string), modulename, filepath, linenumber |
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668 |
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669 For embedded scripts, the modulename and filepath will be different |
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670 from the function arguments. linenumber is an offset relative to |
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671 the input file. |
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672 """ |
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673 py = False |
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674 if not f.endswith('.t'): |
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675 with open(f) as src: |
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676 yield src.read(), modname, f, 0 |
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677 py = True |
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678 if py or f.endswith('.t'): |
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679 with open(f) as src: |
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680 for script, modname, t, line in embedded(f, modname, src): |
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681 yield script, modname, t, line |
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682 |
20036 | 683 def main(argv): |
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684 if len(argv) < 2 or (argv[1] == '-' and len(argv) > 2): |
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685 print('Usage: %s {-|file [file] [file] ...}') |
20036 | 686 return 1 |
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687 if argv[1] == '-': |
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688 argv = argv[:1] |
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689 argv.extend(l.rstrip() for l in sys.stdin.readlines()) |
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690 localmods = {} |
20036 | 691 used_imports = {} |
692 any_errors = False | |
693 for source_path in argv[1:]: | |
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694 modname = dotted_name_of_path(source_path, trimpure=True) |
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695 localmods[modname] = source_path |
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696 for localmodname, source_path in sorted(localmods.items()): |
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697 for src, modname, name, line in sources(source_path, localmodname): |
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698 try: |
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699 used_imports[modname] = sorted( |
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700 imported_modules(src, modname, name, localmods, |
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701 ignore_nested=True)) |
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702 for error, lineno in verify_import_convention(modname, src, |
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703 localmods): |
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704 any_errors = True |
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705 print('%s:%d: %s' % (source_path, lineno + line, error)) |
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706 except SyntaxError as e: |
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707 print('%s:%d: SyntaxError: %s' % |
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708 (source_path, e.lineno + line, e)) |
20036 | 709 cycles = find_cycles(used_imports) |
710 if cycles: | |
711 firstmods = set() | |
712 for c in sorted(cycles, key=_cycle_sortkey): | |
713 first = c.split()[0] | |
714 # As a rough cut, ignore any cycle that starts with the | |
715 # same module as some other cycle. Otherwise we see lots | |
716 # of cycles that are effectively duplicates. | |
717 if first in firstmods: | |
718 continue | |
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719 print('Import cycle:', c) |
20036 | 720 firstmods.add(first) |
721 any_errors = True | |
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|
722 return any_errors != 0 |
20036 | 723 |
724 if __name__ == '__main__': | |
725 sys.exit(int(main(sys.argv))) |