Mercurial > hg
annotate contrib/import-checker.py @ 32481:a87dabb053d0
localrepo: document that __contains__() may raise LookupError
author | Yuya Nishihara <yuya@tcha.org> |
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date | Thu, 25 May 2017 23:18:02 +0900 |
parents | 0906b85bf222 |
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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 # Whitelist of symbols that can be directly imported. |
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28 directsymbols = ( |
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29 'demandimport', |
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30 ) |
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31 |
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32 # Modules that must be aliased because they are commonly confused with |
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33 # common variables and can create aliasing and readability issues. |
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34 requirealias = { |
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35 'ui': 'uimod', |
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36 } |
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37 |
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38 def usingabsolute(root): |
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39 """Whether absolute imports are being used.""" |
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40 if sys.version_info[0] >= 3: |
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41 return True |
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42 |
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43 for node in ast.walk(root): |
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44 if isinstance(node, ast.ImportFrom): |
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45 if node.module == '__future__': |
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46 for n in node.names: |
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47 if n.name == 'absolute_import': |
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48 return True |
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49 |
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50 return False |
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51 |
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52 def walklocal(root): |
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53 """Recursively yield all descendant nodes but not in a different scope""" |
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54 todo = collections.deque(ast.iter_child_nodes(root)) |
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55 yield root, False |
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56 while todo: |
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57 node = todo.popleft() |
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58 newscope = isinstance(node, ast.FunctionDef) |
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59 if not newscope: |
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60 todo.extend(ast.iter_child_nodes(node)) |
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61 yield node, newscope |
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62 |
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63 def dotted_name_of_path(path): |
20036 | 64 """Given a relative path to a source file, return its dotted module name. |
65 | |
66 >>> dotted_name_of_path('mercurial/error.py') | |
67 'mercurial.error' | |
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68 >>> dotted_name_of_path('zlibmodule.so') |
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69 'zlib' |
20036 | 70 """ |
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71 parts = path.replace(os.sep, '/').split('/') |
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72 parts[-1] = parts[-1].split('.', 1)[0] # remove .py and .so and .ARCH.so |
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73 if parts[-1].endswith('module'): |
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74 parts[-1] = parts[-1][:-6] |
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76 | |
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77 def fromlocalfunc(modulename, localmods): |
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78 """Get a function to examine which locally defined module the |
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79 target source imports via a specified name. |
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80 |
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81 `modulename` is an `dotted_name_of_path()`-ed source file path, |
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82 which may have `.__init__` at the end of it, of the target source. |
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83 |
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84 `localmods` is a dict (or set), of which key is an absolute |
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85 `dotted_name_of_path()`-ed source file path of locally defined (= |
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86 Mercurial specific) modules. |
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87 |
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88 This function assumes that module names not existing in |
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89 `localmods` are from the Python standard library. |
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90 |
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91 This function returns the function, which takes `name` argument, |
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92 and returns `(absname, dottedpath, hassubmod)` tuple if `name` |
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93 matches against locally defined module. Otherwise, it returns |
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94 False. |
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95 |
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96 It is assumed that `name` doesn't have `.__init__`. |
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97 |
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98 `absname` is an absolute module name of specified `name` |
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99 (e.g. "hgext.convert"). This can be used to compose prefix for sub |
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100 modules or so. |
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101 |
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102 `dottedpath` is a `dotted_name_of_path()`-ed source file path |
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103 (e.g. "hgext.convert.__init__") of `name`. This is used to look |
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104 module up in `localmods` again. |
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105 |
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106 `hassubmod` is whether it may have sub modules under it (for |
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107 convenient, even though this is also equivalent to "absname != |
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108 dottednpath") |
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109 |
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110 >>> localmods = {'foo.__init__': True, 'foo.foo1': True, |
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111 ... 'foo.bar.__init__': True, 'foo.bar.bar1': True, |
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112 ... 'baz.__init__': True, 'baz.baz1': True } |
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113 >>> fromlocal = fromlocalfunc('foo.xxx', localmods) |
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114 >>> # relative |
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115 >>> fromlocal('foo1') |
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116 ('foo.foo1', 'foo.foo1', False) |
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117 >>> fromlocal('bar') |
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118 ('foo.bar', 'foo.bar.__init__', True) |
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119 >>> fromlocal('bar.bar1') |
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120 ('foo.bar.bar1', 'foo.bar.bar1', False) |
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121 >>> # absolute |
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122 >>> fromlocal('baz') |
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123 ('baz', 'baz.__init__', True) |
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124 >>> fromlocal('baz.baz1') |
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125 ('baz.baz1', 'baz.baz1', False) |
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126 >>> # unknown = maybe standard library |
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127 >>> fromlocal('os') |
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128 False |
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129 >>> fromlocal(None, 1) |
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130 ('foo', 'foo.__init__', True) |
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131 >>> fromlocal('foo1', 1) |
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132 ('foo.foo1', 'foo.foo1', False) |
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133 >>> fromlocal2 = fromlocalfunc('foo.xxx.yyy', localmods) |
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134 >>> fromlocal2(None, 2) |
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135 ('foo', 'foo.__init__', True) |
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136 >>> fromlocal2('bar2', 1) |
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137 False |
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138 >>> fromlocal2('bar', 2) |
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139 ('foo.bar', 'foo.bar.__init__', True) |
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140 """ |
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141 prefix = '.'.join(modulename.split('.')[:-1]) |
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142 if prefix: |
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143 prefix += '.' |
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144 def fromlocal(name, level=0): |
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145 # name is false value when relative imports are used. |
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146 if not name: |
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147 # If relative imports are used, level must not be absolute. |
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148 assert level > 0 |
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149 candidates = ['.'.join(modulename.split('.')[:-level])] |
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150 else: |
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151 if not level: |
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152 # Check relative name first. |
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153 candidates = [prefix + name, name] |
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154 else: |
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155 candidates = ['.'.join(modulename.split('.')[:-level]) + |
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156 '.' + name] |
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157 |
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158 for n in candidates: |
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159 if n in localmods: |
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160 return (n, n, False) |
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161 dottedpath = n + '.__init__' |
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162 if dottedpath in localmods: |
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163 return (n, dottedpath, True) |
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164 return False |
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165 return fromlocal |
20036 | 166 |
167 def list_stdlib_modules(): | |
168 """List the modules present in the stdlib. | |
169 | |
170 >>> mods = set(list_stdlib_modules()) | |
171 >>> 'BaseHTTPServer' in mods | |
172 True | |
173 | |
174 os.path isn't really a module, so it's missing: | |
175 | |
176 >>> 'os.path' in mods | |
177 False | |
178 | |
179 sys requires special treatment, because it's baked into the | |
180 interpreter, but it should still appear: | |
181 | |
182 >>> 'sys' in mods | |
183 True | |
184 | |
185 >>> 'collections' in mods | |
186 True | |
187 | |
188 >>> 'cStringIO' in mods | |
189 True | |
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190 |
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191 >>> 'cffi' in mods |
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192 True |
20036 | 193 """ |
194 for m in sys.builtin_module_names: | |
195 yield m | |
196 # These modules only exist on windows, but we should always | |
197 # consider them stdlib. | |
198 for m in ['msvcrt', '_winreg']: | |
199 yield m | |
200 yield 'builtins' # python3 only | |
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201 for m in 'fcntl', 'grp', 'pwd', 'termios': # Unix only |
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202 yield m |
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203 for m in 'cPickle', 'datetime': # in Python (not C) on PyPy |
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204 yield m |
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205 for m in ['cffi']: |
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206 yield m |
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207 stdlib_prefixes = {sys.prefix, sys.exec_prefix} |
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208 # We need to supplement the list of prefixes for the search to work |
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209 # when run from within a virtualenv. |
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210 for mod in (BaseHTTPServer, zlib): |
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211 try: |
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212 # Not all module objects have a __file__ attribute. |
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213 filename = mod.__file__ |
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214 except AttributeError: |
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215 continue |
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216 dirname = os.path.dirname(filename) |
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217 for prefix in stdlib_prefixes: |
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218 if dirname.startswith(prefix): |
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219 # Then this directory is redundant. |
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220 break |
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221 else: |
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222 stdlib_prefixes.add(dirname) |
20036 | 223 for libpath in sys.path: |
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224 # We want to walk everything in sys.path that starts with |
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225 # something in stdlib_prefixes. |
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226 if not any(libpath.startswith(p) for p in stdlib_prefixes): |
20036 | 227 continue |
228 for top, dirs, files in os.walk(libpath): | |
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229 for i, d in reversed(list(enumerate(dirs))): |
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230 if (not os.path.exists(os.path.join(top, d, '__init__.py')) |
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231 or top == libpath and d in ('hgext', 'mercurial')): |
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232 del dirs[i] |
20036 | 233 for name in files: |
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234 if not name.endswith(('.py', '.so', '.pyc', '.pyo', '.pyd')): |
20036 | 235 continue |
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236 if name.startswith('__init__.py'): |
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237 full_path = top |
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238 else: |
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239 full_path = os.path.join(top, name) |
20036 | 240 rel_path = full_path[len(libpath) + 1:] |
241 mod = dotted_name_of_path(rel_path) | |
242 yield mod | |
243 | |
244 stdlib_modules = set(list_stdlib_modules()) | |
245 | |
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246 def imported_modules(source, modulename, f, localmods, ignore_nested=False): |
20036 | 247 """Given the source of a file as a string, yield the names |
248 imported by that file. | |
249 | |
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250 Args: |
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251 source: The python source to examine as a string. |
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252 modulename: of specified python source (may have `__init__`) |
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253 localmods: dict of locally defined module names (may have `__init__`) |
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254 ignore_nested: If true, import statements that do not start in |
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255 column zero will be ignored. |
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256 |
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257 Returns: |
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258 A list of absolute module names imported by the given source. |
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259 |
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260 >>> f = 'foo/xxx.py' |
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261 >>> modulename = 'foo.xxx' |
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262 >>> localmods = {'foo.__init__': True, |
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263 ... 'foo.foo1': True, 'foo.foo2': True, |
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264 ... 'foo.bar.__init__': True, 'foo.bar.bar1': True, |
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265 ... 'baz.__init__': True, 'baz.baz1': True } |
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266 >>> # standard library (= not locally defined ones) |
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267 >>> sorted(imported_modules( |
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268 ... 'from stdlib1 import foo, bar; import stdlib2', |
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269 ... modulename, f, localmods)) |
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270 [] |
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271 >>> # relative importing |
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272 >>> sorted(imported_modules( |
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273 ... 'import foo1; from bar import bar1', |
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274 ... modulename, f, localmods)) |
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275 ['foo.bar.bar1', 'foo.foo1'] |
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276 >>> sorted(imported_modules( |
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277 ... 'from bar.bar1 import name1, name2, name3', |
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278 ... modulename, f, localmods)) |
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279 ['foo.bar.bar1'] |
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280 >>> # absolute importing |
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281 >>> sorted(imported_modules( |
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282 ... 'from baz import baz1, name1', |
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283 ... modulename, f, localmods)) |
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284 ['baz.__init__', 'baz.baz1'] |
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285 >>> # mixed importing, even though it shouldn't be recommended |
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286 >>> sorted(imported_modules( |
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287 ... 'import stdlib, foo1, baz', |
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288 ... modulename, f, localmods)) |
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289 ['baz.__init__', 'foo.foo1'] |
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290 >>> # ignore_nested |
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291 >>> sorted(imported_modules( |
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292 ... '''import foo |
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293 ... def wat(): |
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294 ... import bar |
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295 ... ''', modulename, f, localmods)) |
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296 ['foo.__init__', 'foo.bar.__init__'] |
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297 >>> sorted(imported_modules( |
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298 ... '''import foo |
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299 ... def wat(): |
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300 ... import bar |
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301 ... ''', modulename, f, localmods, ignore_nested=True)) |
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302 ['foo.__init__'] |
20036 | 303 """ |
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304 fromlocal = fromlocalfunc(modulename, localmods) |
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305 for node in ast.walk(ast.parse(source, f)): |
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306 if ignore_nested and getattr(node, 'col_offset', 0) > 0: |
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307 continue |
20036 | 308 if isinstance(node, ast.Import): |
309 for n in node.names: | |
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310 found = fromlocal(n.name) |
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311 if not found: |
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312 # this should import standard library |
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313 continue |
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314 yield found[1] |
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316 found = fromlocal(node.module, node.level) |
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317 if not found: |
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318 # this should import standard library |
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319 continue |
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320 |
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321 absname, dottedpath, hassubmod = found |
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322 if not hassubmod: |
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323 # "dottedpath" is not a package; must be imported |
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324 yield dottedpath |
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325 # examination of "node.names" should be redundant |
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326 # e.g.: from mercurial.node import nullid, nullrev |
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327 continue |
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328 |
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329 modnotfound = False |
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330 prefix = absname + '.' |
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332 found = fromlocal(prefix + n.name) |
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333 if not found: |
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334 # this should be a function or a property of "node.module" |
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335 modnotfound = True |
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336 continue |
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337 yield found[1] |
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338 if modnotfound: |
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339 # "dottedpath" is a package, but imported because of non-module |
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340 # lookup |
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341 yield dottedpath |
20036 | 342 |
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343 def verify_import_convention(module, source, localmods): |
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344 """Verify imports match our established coding convention. |
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345 |
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346 We have 2 conventions: legacy and modern. The modern convention is in |
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347 effect when using absolute imports. |
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348 |
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349 The legacy convention only looks for mixed imports. The modern convention |
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350 is much more thorough. |
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351 """ |
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352 root = ast.parse(source) |
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353 absolute = usingabsolute(root) |
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354 |
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355 if absolute: |
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356 return verify_modern_convention(module, root, localmods) |
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357 else: |
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358 return verify_stdlib_on_own_line(root) |
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359 |
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360 def verify_modern_convention(module, root, localmods, root_col_offset=0): |
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361 """Verify a file conforms to the modern import convention rules. |
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362 |
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363 The rules of the modern convention are: |
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364 |
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365 * Ordering is stdlib followed by local imports. Each group is lexically |
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366 sorted. |
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367 * Importing multiple modules via "import X, Y" is not allowed: use |
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368 separate import statements. |
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369 * Importing multiple modules via "from X import ..." is allowed if using |
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370 parenthesis and one entry per line. |
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371 * Only 1 relative import statement per import level ("from .", "from ..") |
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372 is allowed. |
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373 * Relative imports from higher levels must occur before lower levels. e.g. |
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374 "from .." must be before "from .". |
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375 * Imports from peer packages should use relative import (e.g. do not |
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376 "import mercurial.foo" from a "mercurial.*" module). |
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377 * Symbols can only be imported from specific modules (see |
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378 `allowsymbolimports`). For other modules, first import the module then |
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379 assign the symbol to a module-level variable. In addition, these imports |
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380 must be performed before other local imports. This rule only |
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381 applies to import statements outside of any blocks. |
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382 * Relative imports from the standard library are not allowed. |
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383 * Certain modules must be aliased to alternate names to avoid aliasing |
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384 and readability problems. See `requirealias`. |
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385 """ |
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386 topmodule = module.split('.')[0] |
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387 fromlocal = fromlocalfunc(module, localmods) |
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388 |
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389 # Whether a local/non-stdlib import has been performed. |
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390 seenlocal = None |
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391 # Whether a local/non-stdlib, non-symbol import has been seen. |
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392 seennonsymbollocal = False |
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393 # The last name to be imported (for sorting). |
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394 lastname = None |
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395 laststdlib = None |
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396 # Relative import levels encountered so far. |
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397 seenlevels = set() |
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398 |
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399 for node, newscope in walklocal(root): |
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400 def msg(fmt, *args): |
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401 return (fmt % args, node.lineno) |
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402 if newscope: |
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403 # Check for local imports in function |
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404 for r in verify_modern_convention(module, node, localmods, |
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405 node.col_offset + 4): |
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406 yield r |
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407 elif isinstance(node, ast.Import): |
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408 # Disallow "import foo, bar" and require separate imports |
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409 # for each module. |
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410 if len(node.names) > 1: |
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411 yield msg('multiple imported names: %s', |
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412 ', '.join(n.name for n in node.names)) |
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413 |
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414 name = node.names[0].name |
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415 asname = node.names[0].asname |
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416 |
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417 stdlib = name in stdlib_modules |
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418 |
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419 # Ignore sorting rules on imports inside blocks. |
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420 if node.col_offset == root_col_offset: |
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421 if lastname and name < lastname and laststdlib == stdlib: |
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422 yield msg('imports not lexically sorted: %s < %s', |
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423 name, lastname) |
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424 |
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425 lastname = name |
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426 laststdlib = stdlib |
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427 |
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428 # stdlib imports should be before local imports. |
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429 if stdlib and seenlocal and node.col_offset == root_col_offset: |
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430 yield msg('stdlib import "%s" follows local import: %s', |
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431 name, seenlocal) |
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432 |
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433 if not stdlib: |
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434 seenlocal = name |
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435 |
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436 # Import of sibling modules should use relative imports. |
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437 topname = name.split('.')[0] |
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438 if topname == topmodule: |
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439 yield msg('import should be relative: %s', name) |
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440 |
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441 if name in requirealias and asname != requirealias[name]: |
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442 yield msg('%s module must be "as" aliased to %s', |
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443 name, requirealias[name]) |
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444 |
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445 elif isinstance(node, ast.ImportFrom): |
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446 # Resolve the full imported module name. |
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447 if node.level > 0: |
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448 fullname = '.'.join(module.split('.')[:-node.level]) |
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449 if node.module: |
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450 fullname += '.%s' % node.module |
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451 else: |
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452 assert node.module |
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453 fullname = node.module |
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454 |
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455 topname = fullname.split('.')[0] |
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456 if topname == topmodule: |
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457 yield msg('import should be relative: %s', fullname) |
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458 |
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459 # __future__ is special since it needs to come first and use |
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460 # symbol import. |
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461 if fullname != '__future__': |
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462 if not fullname or fullname in stdlib_modules: |
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463 yield msg('relative import of stdlib module') |
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464 else: |
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465 seenlocal = fullname |
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466 |
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467 # Direct symbol import is only allowed from certain modules and |
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468 # must occur before non-symbol imports. |
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469 found = fromlocal(node.module, node.level) |
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470 if found and found[2]: # node.module is a package |
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471 prefix = found[0] + '.' |
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472 symbols = (n.name for n in node.names |
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473 if not fromlocal(prefix + n.name)) |
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474 else: |
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475 symbols = (n.name for n in node.names) |
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476 symbols = [sym for sym in symbols if sym not in directsymbols] |
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477 if node.module and node.col_offset == root_col_offset: |
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478 if symbols and fullname not in allowsymbolimports: |
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479 yield msg('direct symbol import %s from %s', |
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480 ', '.join(symbols), fullname) |
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481 |
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482 if symbols and seennonsymbollocal: |
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483 yield msg('symbol import follows non-symbol import: %s', |
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484 fullname) |
29208
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485 if not symbols and fullname not in stdlib_modules: |
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486 seennonsymbollocal = True |
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487 |
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488 if not node.module: |
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489 assert node.level |
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490 |
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491 # Only allow 1 group per level. |
26965
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492 if (node.level in seenlevels |
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493 and node.col_offset == root_col_offset): |
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494 yield msg('multiple "from %s import" statements', |
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495 '.' * node.level) |
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496 |
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497 # Higher-level groups come before lower-level groups. |
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498 if any(node.level > l for l in seenlevels): |
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499 yield msg('higher-level import should come first: %s', |
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500 fullname) |
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501 |
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502 seenlevels.add(node.level) |
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503 |
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504 # Entries in "from .X import ( ... )" lists must be lexically |
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505 # sorted. |
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506 lastentryname = None |
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507 |
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508 for n in node.names: |
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509 if lastentryname and n.name < lastentryname: |
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510 yield msg('imports from %s not lexically sorted: %s < %s', |
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511 fullname, n.name, lastentryname) |
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512 |
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513 lastentryname = n.name |
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514 |
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515 if n.name in requirealias and n.asname != requirealias[n.name]: |
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516 yield msg('%s from %s must be "as" aliased to %s', |
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517 n.name, fullname, requirealias[n.name]) |
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518 |
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519 def verify_stdlib_on_own_line(root): |
20036 | 520 """Given some python source, verify that stdlib imports are done |
521 in separate statements from relative local module imports. | |
522 | |
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523 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, foo'))) |
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524 [('mixed imports\\n stdlib: sys\\n relative: foo', 1)] |
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525 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, os'))) |
20036 | 526 [] |
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527 >>> list(verify_stdlib_on_own_line(ast.parse('import foo, bar'))) |
20036 | 528 [] |
529 """ | |
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530 for node in ast.walk(root): |
20036 | 531 if isinstance(node, ast.Import): |
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532 from_stdlib = {False: [], True: []} |
20036 | 533 for n in node.names: |
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534 from_stdlib[n.name in stdlib_modules].append(n.name) |
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535 if from_stdlib[True] and from_stdlib[False]: |
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536 yield ('mixed imports\n stdlib: %s\n relative: %s' % |
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537 (', '.join(sorted(from_stdlib[True])), |
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538 ', '.join(sorted(from_stdlib[False]))), node.lineno) |
20036 | 539 |
540 class CircularImport(Exception): | |
541 pass | |
542 | |
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543 def checkmod(mod, imports): |
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544 shortest = {} |
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545 visit = [[mod]] |
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546 while visit: |
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547 path = visit.pop(0) |
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548 for i in sorted(imports.get(path[-1], [])): |
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549 if len(path) < shortest.get(i, 1000): |
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550 shortest[i] = len(path) |
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551 if i in path: |
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552 if i == path[0]: |
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553 raise CircularImport(path) |
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554 continue |
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555 visit.append(path + [i]) |
20036 | 556 |
20038
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557 def rotatecycle(cycle): |
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558 """arrange a cycle so that the lexicographically first module listed first |
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559 |
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560 >>> rotatecycle(['foo', 'bar']) |
20038
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561 ['bar', 'foo', 'bar'] |
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562 """ |
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563 lowest = min(cycle) |
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564 idx = cycle.index(lowest) |
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565 return cycle[idx:] + cycle[:idx] + [lowest] |
20036 | 566 |
567 def find_cycles(imports): | |
568 """Find cycles in an already-loaded import graph. | |
569 | |
25175
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570 All module names recorded in `imports` should be absolute one. |
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571 |
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572 >>> from __future__ import print_function |
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573 >>> imports = {'top.foo': ['top.bar', 'os.path', 'top.qux'], |
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574 ... 'top.bar': ['top.baz', 'sys'], |
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575 ... 'top.baz': ['top.foo'], |
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576 ... 'top.qux': ['top.foo']} |
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577 >>> print('\\n'.join(sorted(find_cycles(imports)))) |
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578 top.bar -> top.baz -> top.foo -> top.bar |
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579 top.foo -> top.qux -> top.foo |
20036 | 580 """ |
24491
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581 cycles = set() |
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582 for mod in sorted(imports.keys()): |
20036 | 583 try: |
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584 checkmod(mod, imports) |
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585 except CircularImport as e: |
20036 | 586 cycle = e.args[0] |
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587 cycles.add(" -> ".join(rotatecycle(cycle))) |
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588 return cycles |
20036 | 589 |
590 def _cycle_sortkey(c): | |
591 return len(c), c | |
592 | |
28922
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593 def embedded(f, modname, src): |
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594 """Extract embedded python code |
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595 |
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596 >>> def test(fn, lines): |
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597 ... for s, m, f, l in embedded(fn, "example", lines): |
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598 ... print("%s %s %s" % (m, f, l)) |
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599 ... print(repr(s)) |
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|
600 >>> lines = [ |
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601 ... 'comment', |
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602 ... ' >>> from __future__ import print_function', |
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603 ... " >>> ' multiline", |
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604 ... " ... string'", |
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605 ... ' ', |
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606 ... 'comment', |
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|
607 ... ' $ cat > foo.py <<EOF', |
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608 ... ' > from __future__ import print_function', |
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609 ... ' > EOF', |
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610 ... ] |
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|
611 >>> test("example.t", lines) |
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|
612 example[2] doctest.py 2 |
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613 "from __future__ import print_function\\n' multiline\\nstring'\\n" |
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614 example[7] foo.py 7 |
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615 'from __future__ import print_function\\n' |
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616 """ |
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617 inlinepython = 0 |
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618 shpython = 0 |
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619 script = [] |
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620 prefix = 6 |
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621 t = '' |
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622 n = 0 |
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623 for l in src: |
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624 n += 1 |
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625 if not l.endswith(b'\n'): |
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626 l += b'\n' |
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627 if l.startswith(b' >>> '): # python inlines |
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628 if shpython: |
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629 print("%s:%d: Parse Error" % (f, n)) |
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630 if not inlinepython: |
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631 # We've just entered a Python block. |
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632 inlinepython = n |
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633 t = 'doctest.py' |
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634 script.append(l[prefix:]) |
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635 continue |
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636 if l.startswith(b' ... '): # python inlines |
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637 script.append(l[prefix:]) |
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638 continue |
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639 cat = re.search(r"\$ \s*cat\s*>\s*(\S+\.py)\s*<<\s*EOF", l) |
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640 if cat: |
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641 if inlinepython: |
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642 yield ''.join(script), ("%s[%d]" % |
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643 (modname, inlinepython)), t, inlinepython |
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644 script = [] |
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645 inlinepython = 0 |
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646 shpython = n |
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647 t = cat.group(1) |
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648 continue |
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649 if shpython and l.startswith(b' > '): # sh continuation |
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650 if l == b' > EOF\n': |
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651 yield ''.join(script), ("%s[%d]" % |
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652 (modname, shpython)), t, shpython |
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653 script = [] |
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654 shpython = 0 |
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655 else: |
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656 script.append(l[4:]) |
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657 continue |
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658 if inlinepython and l == b' \n': |
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659 yield ''.join(script), ("%s[%d]" % |
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660 (modname, inlinepython)), t, inlinepython |
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661 script = [] |
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662 inlinepython = 0 |
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663 continue |
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664 |
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665 def sources(f, modname): |
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666 """Yields possibly multiple sources from a filepath |
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667 |
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668 input: filepath, modulename |
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669 yields: script(string), modulename, filepath, linenumber |
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670 |
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671 For embedded scripts, the modulename and filepath will be different |
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672 from the function arguments. linenumber is an offset relative to |
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673 the input file. |
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674 """ |
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675 py = False |
29234
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676 if not f.endswith('.t'): |
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677 with open(f) as src: |
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678 yield src.read(), modname, f, 0 |
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679 py = True |
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680 if py or f.endswith('.t'): |
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681 with open(f) as src: |
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682 for script, modname, t, line in embedded(f, modname, src): |
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683 yield script, modname, t, line |
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684 |
20036 | 685 def main(argv): |
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686 if len(argv) < 2 or (argv[1] == '-' and len(argv) > 2): |
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687 print('Usage: %s {-|file [file] [file] ...}') |
20036 | 688 return 1 |
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689 if argv[1] == '-': |
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690 argv = argv[:1] |
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691 argv.extend(l.rstrip() for l in sys.stdin.readlines()) |
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692 localmods = {} |
20036 | 693 used_imports = {} |
694 any_errors = False | |
695 for source_path in argv[1:]: | |
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696 modname = dotted_name_of_path(source_path) |
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697 localmods[modname] = source_path |
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698 for localmodname, source_path in sorted(localmods.items()): |
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699 for src, modname, name, line in sources(source_path, localmodname): |
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700 try: |
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701 used_imports[modname] = sorted( |
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702 imported_modules(src, modname, name, localmods, |
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703 ignore_nested=True)) |
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704 for error, lineno in verify_import_convention(modname, src, |
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705 localmods): |
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706 any_errors = True |
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707 print('%s:%d: %s' % (source_path, lineno + line, error)) |
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708 except SyntaxError as e: |
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709 print('%s:%d: SyntaxError: %s' % |
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710 (source_path, e.lineno + line, e)) |
20036 | 711 cycles = find_cycles(used_imports) |
712 if cycles: | |
713 firstmods = set() | |
714 for c in sorted(cycles, key=_cycle_sortkey): | |
715 first = c.split()[0] | |
716 # As a rough cut, ignore any cycle that starts with the | |
717 # same module as some other cycle. Otherwise we see lots | |
718 # of cycles that are effectively duplicates. | |
719 if first in firstmods: | |
720 continue | |
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721 print('Import cycle:', c) |
20036 | 722 firstmods.add(first) |
723 any_errors = True | |
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|
724 return any_errors != 0 |
20036 | 725 |
726 if __name__ == '__main__': | |
727 sys.exit(int(main(sys.argv))) |