Mercurial > hg
annotate contrib/import-checker.py @ 40783:e207f0d6c243
perf: update perfindex to be more realistic
The previous code was creating a revlog manually, we now use the actual
`localrepo` method to create it.
We have to jump though extra hops to work around the impact of filecache.
author | Boris Feld <boris.feld@octobus.net> |
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date | Fri, 23 Nov 2018 06:03:38 +0100 |
parents | dd028bca9221 |
children | 98ce494e104d |
rev | line source |
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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 |
20036 | 7 import os |
8 import sys | |
9 | |
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10 # Import a minimal set of stdlib modules needed for list_stdlib_modules() |
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11 # to work when run from a virtualenv. The modules were chosen empirically |
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12 # so that the return value matches the return value without virtualenv. |
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13 if True: # disable lexical sorting checks |
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14 try: |
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15 import BaseHTTPServer as basehttpserver |
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16 except ImportError: |
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17 basehttpserver = None |
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18 import zlib |
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19 |
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20 import testparseutil |
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21 |
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22 # Whitelist of modules that symbols can be directly imported from. |
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23 allowsymbolimports = ( |
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24 '__future__', |
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25 'bzrlib', |
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26 'hgclient', |
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27 'mercurial', |
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28 'mercurial.hgweb.common', |
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29 'mercurial.hgweb.request', |
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30 'mercurial.i18n', |
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31 'mercurial.node', |
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32 # for revlog to re-export constant to extensions |
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33 'mercurial.revlogutils.constants', |
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34 # for cffi modules to re-export pure functions |
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35 'mercurial.pure.base85', |
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36 'mercurial.pure.bdiff', |
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37 'mercurial.pure.mpatch', |
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38 'mercurial.pure.osutil', |
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39 'mercurial.pure.parsers', |
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40 # third-party imports should be directly imported |
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41 'mercurial.thirdparty', |
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42 'mercurial.thirdparty.attr', |
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43 'mercurial.thirdparty.cbor', |
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44 'mercurial.thirdparty.cbor.cbor2', |
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45 'mercurial.thirdparty.zope', |
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46 'mercurial.thirdparty.zope.interface', |
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47 ) |
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48 |
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49 # Whitelist of symbols that can be directly imported. |
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50 directsymbols = ( |
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51 'demandimport', |
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52 ) |
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53 |
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54 # Modules that must be aliased because they are commonly confused with |
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55 # common variables and can create aliasing and readability issues. |
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56 requirealias = { |
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57 'ui': 'uimod', |
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58 } |
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59 |
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60 def usingabsolute(root): |
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61 """Whether absolute imports are being used.""" |
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62 if sys.version_info[0] >= 3: |
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63 return True |
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64 |
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65 for node in ast.walk(root): |
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66 if isinstance(node, ast.ImportFrom): |
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67 if node.module == '__future__': |
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68 for n in node.names: |
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69 if n.name == 'absolute_import': |
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70 return True |
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71 |
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72 return False |
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73 |
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74 def walklocal(root): |
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75 """Recursively yield all descendant nodes but not in a different scope""" |
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76 todo = collections.deque(ast.iter_child_nodes(root)) |
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77 yield root, False |
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78 while todo: |
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79 node = todo.popleft() |
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80 newscope = isinstance(node, ast.FunctionDef) |
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81 if not newscope: |
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82 todo.extend(ast.iter_child_nodes(node)) |
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83 yield node, newscope |
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84 |
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85 def dotted_name_of_path(path): |
20036 | 86 """Given a relative path to a source file, return its dotted module name. |
87 | |
88 >>> dotted_name_of_path('mercurial/error.py') | |
89 'mercurial.error' | |
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90 >>> dotted_name_of_path('zlibmodule.so') |
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91 'zlib' |
20036 | 92 """ |
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93 parts = path.replace(os.sep, '/').split('/') |
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94 parts[-1] = parts[-1].split('.', 1)[0] # remove .py and .so and .ARCH.so |
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95 if parts[-1].endswith('module'): |
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96 parts[-1] = parts[-1][:-6] |
20036 | 97 return '.'.join(parts) |
98 | |
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99 def fromlocalfunc(modulename, localmods): |
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100 """Get a function to examine which locally defined module the |
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101 target source imports via a specified name. |
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102 |
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103 `modulename` is an `dotted_name_of_path()`-ed source file path, |
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104 which may have `.__init__` at the end of it, of the target source. |
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105 |
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106 `localmods` is a set of absolute `dotted_name_of_path()`-ed source file |
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107 paths of locally defined (= Mercurial specific) modules. |
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108 |
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109 This function assumes that module names not existing in |
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110 `localmods` are from the Python standard library. |
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111 |
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112 This function returns the function, which takes `name` argument, |
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113 and returns `(absname, dottedpath, hassubmod)` tuple if `name` |
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114 matches against locally defined module. Otherwise, it returns |
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115 False. |
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116 |
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117 It is assumed that `name` doesn't have `.__init__`. |
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118 |
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119 `absname` is an absolute module name of specified `name` |
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120 (e.g. "hgext.convert"). This can be used to compose prefix for sub |
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121 modules or so. |
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122 |
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123 `dottedpath` is a `dotted_name_of_path()`-ed source file path |
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124 (e.g. "hgext.convert.__init__") of `name`. This is used to look |
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125 module up in `localmods` again. |
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126 |
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127 `hassubmod` is whether it may have sub modules under it (for |
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128 convenient, even though this is also equivalent to "absname != |
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129 dottednpath") |
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130 |
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131 >>> localmods = {'foo.__init__', 'foo.foo1', |
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132 ... 'foo.bar.__init__', 'foo.bar.bar1', |
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133 ... 'baz.__init__', 'baz.baz1'} |
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134 >>> fromlocal = fromlocalfunc('foo.xxx', localmods) |
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135 >>> # relative |
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136 >>> fromlocal('foo1') |
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137 ('foo.foo1', 'foo.foo1', False) |
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138 >>> fromlocal('bar') |
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139 ('foo.bar', 'foo.bar.__init__', True) |
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140 >>> fromlocal('bar.bar1') |
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141 ('foo.bar.bar1', 'foo.bar.bar1', False) |
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142 >>> # absolute |
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143 >>> fromlocal('baz') |
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144 ('baz', 'baz.__init__', True) |
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145 >>> fromlocal('baz.baz1') |
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146 ('baz.baz1', 'baz.baz1', False) |
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147 >>> # unknown = maybe standard library |
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148 >>> fromlocal('os') |
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149 False |
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150 >>> fromlocal(None, 1) |
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151 ('foo', 'foo.__init__', True) |
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152 >>> fromlocal('foo1', 1) |
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153 ('foo.foo1', 'foo.foo1', False) |
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154 >>> fromlocal2 = fromlocalfunc('foo.xxx.yyy', localmods) |
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155 >>> fromlocal2(None, 2) |
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156 ('foo', 'foo.__init__', True) |
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157 >>> fromlocal2('bar2', 1) |
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158 False |
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159 >>> fromlocal2('bar', 2) |
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160 ('foo.bar', 'foo.bar.__init__', True) |
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161 """ |
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162 if not isinstance(modulename, str): |
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163 modulename = modulename.decode('ascii') |
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164 prefix = '.'.join(modulename.split('.')[:-1]) |
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165 if prefix: |
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166 prefix += '.' |
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167 def fromlocal(name, level=0): |
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168 # name is false value when relative imports are used. |
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169 if not name: |
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170 # If relative imports are used, level must not be absolute. |
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171 assert level > 0 |
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172 candidates = ['.'.join(modulename.split('.')[:-level])] |
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173 else: |
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174 if not level: |
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175 # Check relative name first. |
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176 candidates = [prefix + name, name] |
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177 else: |
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178 candidates = ['.'.join(modulename.split('.')[:-level]) + |
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179 '.' + name] |
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180 |
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181 for n in candidates: |
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182 if n in localmods: |
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183 return (n, n, False) |
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184 dottedpath = n + '.__init__' |
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185 if dottedpath in localmods: |
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186 return (n, dottedpath, True) |
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187 return False |
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188 return fromlocal |
20036 | 189 |
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190 def populateextmods(localmods): |
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191 """Populate C extension modules based on pure modules""" |
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192 newlocalmods = set(localmods) |
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193 for n in localmods: |
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194 if n.startswith('mercurial.pure.'): |
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195 m = n[len('mercurial.pure.'):] |
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196 newlocalmods.add('mercurial.cext.' + m) |
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197 newlocalmods.add('mercurial.cffi._' + m) |
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198 return newlocalmods |
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199 |
20036 | 200 def list_stdlib_modules(): |
201 """List the modules present in the stdlib. | |
202 | |
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203 >>> py3 = sys.version_info[0] >= 3 |
20036 | 204 >>> mods = set(list_stdlib_modules()) |
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205 >>> 'BaseHTTPServer' in mods or py3 |
20036 | 206 True |
207 | |
208 os.path isn't really a module, so it's missing: | |
209 | |
210 >>> 'os.path' in mods | |
211 False | |
212 | |
213 sys requires special treatment, because it's baked into the | |
214 interpreter, but it should still appear: | |
215 | |
216 >>> 'sys' in mods | |
217 True | |
218 | |
219 >>> 'collections' in mods | |
220 True | |
221 | |
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222 >>> 'cStringIO' in mods or py3 |
20036 | 223 True |
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224 |
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225 >>> 'cffi' in mods |
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226 True |
20036 | 227 """ |
228 for m in sys.builtin_module_names: | |
229 yield m | |
230 # These modules only exist on windows, but we should always | |
231 # consider them stdlib. | |
232 for m in ['msvcrt', '_winreg']: | |
233 yield m | |
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234 yield '__builtin__' |
20036 | 235 yield 'builtins' # python3 only |
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236 yield 'importlib.abc' # python3 only |
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237 yield 'importlib.machinery' # python3 only |
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238 yield 'importlib.util' # python3 only |
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239 for m in 'fcntl', 'grp', 'pwd', 'termios': # Unix only |
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240 yield m |
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241 for m in 'cPickle', 'datetime': # in Python (not C) on PyPy |
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242 yield m |
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243 for m in ['cffi']: |
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244 yield m |
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245 stdlib_prefixes = {sys.prefix, sys.exec_prefix} |
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246 # We need to supplement the list of prefixes for the search to work |
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247 # when run from within a virtualenv. |
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248 for mod in (basehttpserver, zlib): |
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249 if mod is None: |
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250 continue |
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251 try: |
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252 # Not all module objects have a __file__ attribute. |
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253 filename = mod.__file__ |
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254 except AttributeError: |
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255 continue |
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256 dirname = os.path.dirname(filename) |
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257 for prefix in stdlib_prefixes: |
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258 if dirname.startswith(prefix): |
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259 # Then this directory is redundant. |
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260 break |
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261 else: |
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262 stdlib_prefixes.add(dirname) |
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263 sourceroot = os.path.abspath(os.path.dirname(os.path.dirname(__file__))) |
20036 | 264 for libpath in sys.path: |
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265 # We want to walk everything in sys.path that starts with something in |
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266 # stdlib_prefixes, but not directories from the hg sources. |
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267 if (os.path.abspath(libpath).startswith(sourceroot) |
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268 or not any(libpath.startswith(p) for p in stdlib_prefixes)): |
20036 | 269 continue |
270 for top, dirs, files in os.walk(libpath): | |
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271 for i, d in reversed(list(enumerate(dirs))): |
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272 if (not os.path.exists(os.path.join(top, d, '__init__.py')) |
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273 or top == libpath and d in ('hgdemandimport', 'hgext', |
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274 'mercurial')): |
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275 del dirs[i] |
20036 | 276 for name in files: |
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277 if not name.endswith(('.py', '.so', '.pyc', '.pyo', '.pyd')): |
20036 | 278 continue |
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279 if name.startswith('__init__.py'): |
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280 full_path = top |
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281 else: |
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282 full_path = os.path.join(top, name) |
20036 | 283 rel_path = full_path[len(libpath) + 1:] |
284 mod = dotted_name_of_path(rel_path) | |
285 yield mod | |
286 | |
287 stdlib_modules = set(list_stdlib_modules()) | |
288 | |
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289 def imported_modules(source, modulename, f, localmods, ignore_nested=False): |
20036 | 290 """Given the source of a file as a string, yield the names |
291 imported by that file. | |
292 | |
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293 Args: |
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294 source: The python source to examine as a string. |
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295 modulename: of specified python source (may have `__init__`) |
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296 localmods: set of locally defined module names (may have `__init__`) |
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297 ignore_nested: If true, import statements that do not start in |
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298 column zero will be ignored. |
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299 |
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300 Returns: |
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301 A list of absolute module names imported by the given source. |
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302 |
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303 >>> f = 'foo/xxx.py' |
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304 >>> modulename = 'foo.xxx' |
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305 >>> localmods = {'foo.__init__': True, |
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306 ... 'foo.foo1': True, 'foo.foo2': True, |
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307 ... 'foo.bar.__init__': True, 'foo.bar.bar1': True, |
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308 ... 'baz.__init__': True, 'baz.baz1': True } |
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309 >>> # standard library (= not locally defined ones) |
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310 >>> sorted(imported_modules( |
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311 ... 'from stdlib1 import foo, bar; import stdlib2', |
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312 ... modulename, f, localmods)) |
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313 [] |
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314 >>> # relative importing |
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315 >>> sorted(imported_modules( |
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316 ... 'import foo1; from bar import bar1', |
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317 ... modulename, f, localmods)) |
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318 ['foo.bar.bar1', 'foo.foo1'] |
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319 >>> sorted(imported_modules( |
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320 ... 'from bar.bar1 import name1, name2, name3', |
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321 ... modulename, f, localmods)) |
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322 ['foo.bar.bar1'] |
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323 >>> # absolute importing |
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324 >>> sorted(imported_modules( |
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325 ... 'from baz import baz1, name1', |
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326 ... modulename, f, localmods)) |
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327 ['baz.__init__', 'baz.baz1'] |
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328 >>> # mixed importing, even though it shouldn't be recommended |
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329 >>> sorted(imported_modules( |
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330 ... 'import stdlib, foo1, baz', |
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331 ... modulename, f, localmods)) |
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332 ['baz.__init__', 'foo.foo1'] |
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333 >>> # ignore_nested |
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334 >>> sorted(imported_modules( |
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335 ... '''import foo |
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336 ... def wat(): |
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337 ... import bar |
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338 ... ''', modulename, f, localmods)) |
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339 ['foo.__init__', 'foo.bar.__init__'] |
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340 >>> sorted(imported_modules( |
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341 ... '''import foo |
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342 ... def wat(): |
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343 ... import bar |
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344 ... ''', modulename, f, localmods, ignore_nested=True)) |
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345 ['foo.__init__'] |
20036 | 346 """ |
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347 fromlocal = fromlocalfunc(modulename, localmods) |
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348 for node in ast.walk(ast.parse(source, f)): |
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349 if ignore_nested and getattr(node, 'col_offset', 0) > 0: |
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350 continue |
20036 | 351 if isinstance(node, ast.Import): |
352 for n in node.names: | |
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353 found = fromlocal(n.name) |
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354 if not found: |
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355 # this should import standard library |
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356 continue |
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357 yield found[1] |
20036 | 358 elif isinstance(node, ast.ImportFrom): |
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359 found = fromlocal(node.module, node.level) |
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360 if not found: |
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361 # this should import standard library |
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362 continue |
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363 |
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364 absname, dottedpath, hassubmod = found |
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365 if not hassubmod: |
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366 # "dottedpath" is not a package; must be imported |
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367 yield dottedpath |
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368 # examination of "node.names" should be redundant |
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369 # e.g.: from mercurial.node import nullid, nullrev |
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370 continue |
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371 |
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372 modnotfound = False |
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373 prefix = absname + '.' |
20036 | 374 for n in node.names: |
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375 found = fromlocal(prefix + n.name) |
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376 if not found: |
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377 # this should be a function or a property of "node.module" |
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378 modnotfound = True |
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379 continue |
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380 yield found[1] |
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381 if modnotfound: |
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382 # "dottedpath" is a package, but imported because of non-module |
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383 # lookup |
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384 yield dottedpath |
20036 | 385 |
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386 def verify_import_convention(module, source, localmods): |
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387 """Verify imports match our established coding convention. |
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388 |
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389 We have 2 conventions: legacy and modern. The modern convention is in |
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390 effect when using absolute imports. |
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391 |
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392 The legacy convention only looks for mixed imports. The modern convention |
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393 is much more thorough. |
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394 """ |
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395 root = ast.parse(source) |
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396 absolute = usingabsolute(root) |
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397 |
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398 if absolute: |
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399 return verify_modern_convention(module, root, localmods) |
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400 else: |
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401 return verify_stdlib_on_own_line(root) |
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402 |
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403 def verify_modern_convention(module, root, localmods, root_col_offset=0): |
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404 """Verify a file conforms to the modern import convention rules. |
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405 |
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406 The rules of the modern convention are: |
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407 |
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408 * Ordering is stdlib followed by local imports. Each group is lexically |
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409 sorted. |
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410 * Importing multiple modules via "import X, Y" is not allowed: use |
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411 separate import statements. |
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412 * Importing multiple modules via "from X import ..." is allowed if using |
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413 parenthesis and one entry per line. |
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414 * Only 1 relative import statement per import level ("from .", "from ..") |
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415 is allowed. |
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416 * Relative imports from higher levels must occur before lower levels. e.g. |
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417 "from .." must be before "from .". |
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418 * Imports from peer packages should use relative import (e.g. do not |
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419 "import mercurial.foo" from a "mercurial.*" module). |
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420 * Symbols can only be imported from specific modules (see |
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421 `allowsymbolimports`). For other modules, first import the module then |
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422 assign the symbol to a module-level variable. In addition, these imports |
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423 must be performed before other local imports. This rule only |
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424 applies to import statements outside of any blocks. |
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425 * Relative imports from the standard library are not allowed, unless that |
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426 library is also a local module. |
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427 * Certain modules must be aliased to alternate names to avoid aliasing |
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428 and readability problems. See `requirealias`. |
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429 """ |
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430 if not isinstance(module, str): |
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431 module = module.decode('ascii') |
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432 topmodule = module.split('.')[0] |
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433 fromlocal = fromlocalfunc(module, localmods) |
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434 |
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435 # Whether a local/non-stdlib import has been performed. |
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436 seenlocal = None |
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437 # Whether a local/non-stdlib, non-symbol import has been seen. |
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438 seennonsymbollocal = False |
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439 # The last name to be imported (for sorting). |
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440 lastname = None |
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441 laststdlib = None |
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442 # Relative import levels encountered so far. |
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443 seenlevels = set() |
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444 |
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445 for node, newscope in walklocal(root): |
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446 def msg(fmt, *args): |
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447 return (fmt % args, node.lineno) |
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448 if newscope: |
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449 # Check for local imports in function |
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450 for r in verify_modern_convention(module, node, localmods, |
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451 node.col_offset + 4): |
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452 yield r |
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453 elif isinstance(node, ast.Import): |
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454 # Disallow "import foo, bar" and require separate imports |
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455 # for each module. |
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456 if len(node.names) > 1: |
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457 yield msg('multiple imported names: %s', |
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458 ', '.join(n.name for n in node.names)) |
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459 |
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460 name = node.names[0].name |
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461 asname = node.names[0].asname |
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462 |
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463 stdlib = name in stdlib_modules |
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464 |
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465 # Ignore sorting rules on imports inside blocks. |
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466 if node.col_offset == root_col_offset: |
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467 if lastname and name < lastname and laststdlib == stdlib: |
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468 yield msg('imports not lexically sorted: %s < %s', |
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469 name, lastname) |
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470 |
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471 lastname = name |
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472 laststdlib = stdlib |
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473 |
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474 # stdlib imports should be before local imports. |
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475 if stdlib and seenlocal and node.col_offset == root_col_offset: |
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476 yield msg('stdlib import "%s" follows local import: %s', |
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477 name, seenlocal) |
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478 |
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479 if not stdlib: |
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480 seenlocal = name |
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481 |
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482 # Import of sibling modules should use relative imports. |
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483 topname = name.split('.')[0] |
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484 if topname == topmodule: |
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485 yield msg('import should be relative: %s', name) |
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486 |
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487 if name in requirealias and asname != requirealias[name]: |
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488 yield msg('%s module must be "as" aliased to %s', |
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489 name, requirealias[name]) |
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490 |
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491 elif isinstance(node, ast.ImportFrom): |
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492 # Resolve the full imported module name. |
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493 if node.level > 0: |
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494 fullname = '.'.join(module.split('.')[:-node.level]) |
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495 if node.module: |
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496 fullname += '.%s' % node.module |
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497 else: |
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498 assert node.module |
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499 fullname = node.module |
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500 |
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501 topname = fullname.split('.')[0] |
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502 if topname == topmodule: |
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503 yield msg('import should be relative: %s', fullname) |
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504 |
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505 # __future__ is special since it needs to come first and use |
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506 # symbol import. |
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507 if fullname != '__future__': |
34038
bc2535238de2
import-checker: allow relative import a module being checked
Jun Wu <quark@fb.com>
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33920
diff
changeset
|
508 if not fullname or ( |
bc2535238de2
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Jun Wu <quark@fb.com>
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diff
changeset
|
509 fullname in stdlib_modules |
bc2535238de2
import-checker: allow relative import a module being checked
Jun Wu <quark@fb.com>
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diff
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|
510 and fullname not in localmods |
bc2535238de2
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511 and fullname + '.__init__' not in localmods): |
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512 yield msg('relative import of stdlib module') |
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513 else: |
28330
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514 seenlocal = fullname |
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515 |
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516 # Direct symbol import is only allowed from certain modules and |
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517 # must occur before non-symbol imports. |
29207
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518 found = fromlocal(node.module, node.level) |
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519 if found and found[2]: # node.module is a package |
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diff
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520 prefix = found[0] + '.' |
32419
d02888308235
import-checker: add a way to directly import certain symbols
Siddharth Agarwal <sid0@fb.com>
parents:
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changeset
|
521 symbols = (n.name for n in node.names |
d02888308235
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522 if not fromlocal(prefix + n.name)) |
29207
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523 else: |
32419
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524 symbols = (n.name for n in node.names) |
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525 symbols = [sym for sym in symbols if sym not in directsymbols] |
26965
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|
526 if node.module and node.col_offset == root_col_offset: |
27272
69308357ecd1
import-checker: allow absolute imports of sub modules from local packages
Yuya Nishihara <yuya@tcha.org>
parents:
27018
diff
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|
527 if symbols and fullname not in allowsymbolimports: |
27273
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Yuya Nishihara <yuya@tcha.org>
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528 yield msg('direct symbol import %s from %s', |
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import-checker: tell which symbol causes "direct symbol import"
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529 ', '.join(symbols), fullname) |
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|
530 |
29208
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parents:
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|
531 if symbols and seennonsymbollocal: |
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532 yield msg('symbol import follows non-symbol import: %s', |
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|
533 fullname) |
29208
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|
534 if not symbols and fullname not in stdlib_modules: |
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535 seennonsymbollocal = True |
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536 |
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537 if not node.module: |
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538 assert node.level |
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539 |
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|
540 # Only allow 1 group per level. |
26965
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parents:
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diff
changeset
|
541 if (node.level in seenlevels |
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542 and node.col_offset == root_col_offset): |
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|
543 yield msg('multiple "from %s import" statements', |
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|
544 '.' * node.level) |
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545 |
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|
546 # Higher-level groups come before lower-level groups. |
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547 if any(node.level > l for l in seenlevels): |
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|
548 yield msg('higher-level import should come first: %s', |
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diff
changeset
|
549 fullname) |
25703
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diff
changeset
|
550 |
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diff
changeset
|
551 seenlevels.add(node.level) |
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|
552 |
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|
553 # Entries in "from .X import ( ... )" lists must be lexically |
1a6a117d0b95
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|
554 # sorted. |
1a6a117d0b95
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diff
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|
555 lastentryname = None |
1a6a117d0b95
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diff
changeset
|
556 |
1a6a117d0b95
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|
557 for n in node.names: |
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changeset
|
558 if lastentryname and n.name < lastentryname: |
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parents:
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diff
changeset
|
559 yield msg('imports from %s not lexically sorted: %s < %s', |
c4114e335b49
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diff
changeset
|
560 fullname, n.name, lastentryname) |
25703
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parents:
25702
diff
changeset
|
561 |
1a6a117d0b95
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diff
changeset
|
562 lastentryname = n.name |
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import-checker: establish modern import convention
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diff
changeset
|
563 |
1a6a117d0b95
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parents:
25702
diff
changeset
|
564 if n.name in requirealias and n.asname != requirealias[n.name]: |
26955
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|
565 yield msg('%s from %s must be "as" aliased to %s', |
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parents:
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diff
changeset
|
566 n.name, fullname, requirealias[n.name]) |
25702
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import-checker: establish new function for verifying import conventions
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parents:
25701
diff
changeset
|
567 |
ab2c5163900e
import-checker: establish new function for verifying import conventions
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diff
changeset
|
568 def verify_stdlib_on_own_line(root): |
20036 | 569 """Given some python source, verify that stdlib imports are done |
570 in separate statements from relative local module imports. | |
571 | |
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diff
changeset
|
572 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, foo'))) |
26956
4b56214ebb7a
import-checker: include lineno in warning message
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diff
changeset
|
573 [('mixed imports\\n stdlib: sys\\n relative: foo', 1)] |
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diff
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|
574 >>> list(verify_stdlib_on_own_line(ast.parse('import sys, os'))) |
20036 | 575 [] |
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|
576 >>> list(verify_stdlib_on_own_line(ast.parse('import foo, bar'))) |
20036 | 577 [] |
578 """ | |
25702
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diff
changeset
|
579 for node in ast.walk(root): |
20036 | 580 if isinstance(node, ast.Import): |
20386
a05d31b040d7
import-checker: show stdlib and relative imports separately
Mads Kiilerich <madski@unity3d.com>
parents:
20383
diff
changeset
|
581 from_stdlib = {False: [], True: []} |
20036 | 582 for n in node.names: |
20386
a05d31b040d7
import-checker: show stdlib and relative imports separately
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parents:
20383
diff
changeset
|
583 from_stdlib[n.name in stdlib_modules].append(n.name) |
a05d31b040d7
import-checker: show stdlib and relative imports separately
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parents:
20383
diff
changeset
|
584 if from_stdlib[True] and from_stdlib[False]: |
a05d31b040d7
import-checker: show stdlib and relative imports separately
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parents:
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diff
changeset
|
585 yield ('mixed imports\n stdlib: %s\n relative: %s' % |
a05d31b040d7
import-checker: show stdlib and relative imports separately
Mads Kiilerich <madski@unity3d.com>
parents:
20383
diff
changeset
|
586 (', '.join(sorted(from_stdlib[True])), |
26956
4b56214ebb7a
import-checker: include lineno in warning message
Yuya Nishihara <yuya@tcha.org>
parents:
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|
587 ', '.join(sorted(from_stdlib[False]))), node.lineno) |
20036 | 588 |
589 class CircularImport(Exception): | |
590 pass | |
591 | |
24490
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
592 def checkmod(mod, imports): |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
593 shortest = {} |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
594 visit = [[mod]] |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
595 while visit: |
fb4639d5268e
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Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
596 path = visit.pop(0) |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
597 for i in sorted(imports.get(path[-1], [])): |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
598 if len(path) < shortest.get(i, 1000): |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
599 shortest[i] = len(path) |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
diff
changeset
|
600 if i in path: |
fb4639d5268e
import-checker: make search algorithm non-recursive breadth-first
Matt Mackall <mpm@selenic.com>
parents:
24489
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601 if i == path[0]: |
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602 raise CircularImport(path) |
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603 continue |
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604 visit.append(path + [i]) |
20036 | 605 |
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606 def rotatecycle(cycle): |
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607 """arrange a cycle so that the lexicographically first module listed first |
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608 |
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609 >>> rotatecycle(['foo', 'bar']) |
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610 ['bar', 'foo', 'bar'] |
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611 """ |
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612 lowest = min(cycle) |
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613 idx = cycle.index(lowest) |
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614 return cycle[idx:] + cycle[:idx] + [lowest] |
20036 | 615 |
616 def find_cycles(imports): | |
617 """Find cycles in an already-loaded import graph. | |
618 | |
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619 All module names recorded in `imports` should be absolute one. |
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620 |
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621 >>> from __future__ import print_function |
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622 >>> imports = {'top.foo': ['top.bar', 'os.path', 'top.qux'], |
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623 ... 'top.bar': ['top.baz', 'sys'], |
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624 ... 'top.baz': ['top.foo'], |
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625 ... 'top.qux': ['top.foo']} |
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626 >>> print('\\n'.join(sorted(find_cycles(imports)))) |
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627 top.bar -> top.baz -> top.foo -> top.bar |
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628 top.foo -> top.qux -> top.foo |
20036 | 629 """ |
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630 cycles = set() |
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631 for mod in sorted(imports.keys()): |
20036 | 632 try: |
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633 checkmod(mod, imports) |
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634 except CircularImport as e: |
20036 | 635 cycle = e.args[0] |
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636 cycles.add(" -> ".join(rotatecycle(cycle))) |
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637 return cycles |
20036 | 638 |
639 def _cycle_sortkey(c): | |
640 return len(c), c | |
641 | |
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642 def embedded(f, modname, src): |
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643 """Extract embedded python code |
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644 |
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645 >>> def _forcestr(thing): |
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646 ... if not isinstance(thing, str): |
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647 ... return thing.decode('ascii') |
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648 ... return thing |
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649 >>> def test(fn, lines): |
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650 ... for s, m, f, l in embedded(fn, b"example", lines): |
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651 ... print("%s %s %d" % (_forcestr(m), _forcestr(f), l)) |
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652 ... print(repr(_forcestr(s))) |
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653 >>> lines = [ |
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654 ... b'comment', |
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655 ... b' >>> from __future__ import print_function', |
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656 ... b" >>> ' multiline", |
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657 ... b" ... string'", |
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658 ... b' ', |
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659 ... b'comment', |
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660 ... b' $ cat > foo.py <<EOF', |
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661 ... b' > from __future__ import print_function', |
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662 ... b' > EOF', |
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663 ... ] |
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664 >>> test(b"example.t", lines) |
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665 example[2] doctest.py 1 |
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666 "from __future__ import print_function\\n' multiline\\nstring'\\n\\n" |
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667 example[8] foo.py 7 |
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668 'from __future__ import print_function\\n' |
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669 """ |
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670 errors = [] |
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671 for name, starts, ends, code in testparseutil.pyembedded(f, src, errors): |
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672 if not name: |
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673 # use 'doctest.py', in order to make already existing |
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674 # doctest above pass instantly |
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675 name = 'doctest.py' |
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676 # "starts" is "line number" (1-origin), but embedded() is |
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677 # expected to return "line offset" (0-origin). Therefore, this |
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678 # yields "starts - 1". |
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679 if not isinstance(modname, str): |
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680 modname = modname.decode('utf8') |
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681 yield code, "%s[%d]" % (modname, starts), name, starts - 1 |
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682 |
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683 def sources(f, modname): |
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684 """Yields possibly multiple sources from a filepath |
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685 |
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686 input: filepath, modulename |
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687 yields: script(string), modulename, filepath, linenumber |
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688 |
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689 For embedded scripts, the modulename and filepath will be different |
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690 from the function arguments. linenumber is an offset relative to |
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691 the input file. |
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692 """ |
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693 py = False |
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694 if not f.endswith('.t'): |
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695 with open(f, 'rb') as src: |
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696 yield src.read(), modname, f, 0 |
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697 py = True |
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698 if py or f.endswith('.t'): |
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699 with open(f, 'rb') as src: |
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700 for script, modname, t, line in embedded(f, modname, src): |
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701 yield script, modname.encode('utf8'), t, line |
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702 |
20036 | 703 def main(argv): |
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704 if len(argv) < 2 or (argv[1] == '-' and len(argv) > 2): |
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705 print('Usage: %s {-|file [file] [file] ...}') |
20036 | 706 return 1 |
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707 if argv[1] == '-': |
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708 argv = argv[:1] |
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709 argv.extend(l.rstrip() for l in sys.stdin.readlines()) |
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710 localmodpaths = {} |
20036 | 711 used_imports = {} |
712 any_errors = False | |
713 for source_path in argv[1:]: | |
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714 modname = dotted_name_of_path(source_path) |
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715 localmodpaths[modname] = source_path |
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716 localmods = populateextmods(localmodpaths) |
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717 for localmodname, source_path in sorted(localmodpaths.items()): |
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718 if not isinstance(localmodname, bytes): |
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719 # This is only safe because all hg's files are ascii |
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720 localmodname = localmodname.encode('ascii') |
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721 for src, modname, name, line in sources(source_path, localmodname): |
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722 try: |
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723 used_imports[modname] = sorted( |
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724 imported_modules(src, modname, name, localmods, |
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725 ignore_nested=True)) |
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726 for error, lineno in verify_import_convention(modname, src, |
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727 localmods): |
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728 any_errors = True |
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import-checker: parse python code from .t files
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729 print('%s:%d: %s' % (source_path, lineno + line, error)) |
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730 except SyntaxError as e: |
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731 print('%s:%d: SyntaxError: %s' % |
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732 (source_path, e.lineno + line, e)) |
20036 | 733 cycles = find_cycles(used_imports) |
734 if cycles: | |
735 firstmods = set() | |
736 for c in sorted(cycles, key=_cycle_sortkey): | |
737 first = c.split()[0] | |
738 # As a rough cut, ignore any cycle that starts with the | |
739 # same module as some other cycle. Otherwise we see lots | |
740 # of cycles that are effectively duplicates. | |
741 if first in firstmods: | |
742 continue | |
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743 print('Import cycle:', c) |
20036 | 744 firstmods.add(first) |
745 any_errors = True | |
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746 return any_errors != 0 |
20036 | 747 |
748 if __name__ == '__main__': | |
749 sys.exit(int(main(sys.argv))) |