annotate mercurial/minifileset.py @ 36705:c6901665cd5b

py3: make sure __repr__ returns a str # skip-blame because just r'' prefix Differential Revision: https://phab.mercurial-scm.org/D2652
author Pulkit Goyal <7895pulkit@gmail.com>
date Sun, 04 Mar 2018 22:40:33 +0530
parents d5288b966e2f
children 9c98cb30f4de
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1 # minifileset.py - a simple language to select files
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2 #
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3 # Copyright 2017 Facebook, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 from .i18n import _
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11 from . import (
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12 error,
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13 fileset,
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14 )
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15
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16 def _compile(tree):
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17 if not tree:
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18 raise error.ParseError(_("missing argument"))
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19 op = tree[0]
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20 if op in {'symbol', 'string', 'kindpat'}:
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21 name = fileset.getpattern(tree, {'path'}, _('invalid file pattern'))
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22 if name.startswith('**'): # file extension test, ex. "**.tar.gz"
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23 ext = name[2:]
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24 for c in ext:
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25 if c in '*{}[]?/\\':
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26 raise error.ParseError(_('reserved character: %s') % c)
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27 return lambda n, s: n.endswith(ext)
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28 elif name.startswith('path:'): # directory or full path test
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29 p = name[5:] # prefix
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30 pl = len(p)
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31 f = lambda n, s: n.startswith(p) and (len(n) == pl or n[pl] == '/')
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32 return f
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33 raise error.ParseError(_("unsupported file pattern: %s") % name,
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34 hint=_('paths must be prefixed with "path:"'))
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35 elif op == 'or':
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36 func1 = _compile(tree[1])
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37 func2 = _compile(tree[2])
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38 return lambda n, s: func1(n, s) or func2(n, s)
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39 elif op == 'and':
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40 func1 = _compile(tree[1])
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41 func2 = _compile(tree[2])
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42 return lambda n, s: func1(n, s) and func2(n, s)
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43 elif op == 'not':
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44 return lambda n, s: not _compile(tree[1])(n, s)
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45 elif op == 'group':
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46 return _compile(tree[1])
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47 elif op == 'func':
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48 symbols = {
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49 'all': lambda n, s: True,
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50 'none': lambda n, s: False,
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51 'size': lambda n, s: fileset.sizematcher(tree[2])(s),
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52 }
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53
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54 name = fileset.getsymbol(tree[1])
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55 if name in symbols:
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56 return symbols[name]
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57
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58 raise error.UnknownIdentifier(name, symbols.keys())
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59 elif op == 'minus': # equivalent to 'x and not y'
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60 func1 = _compile(tree[1])
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61 func2 = _compile(tree[2])
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62 return lambda n, s: func1(n, s) and not func2(n, s)
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63 elif op == 'negate':
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64 raise error.ParseError(_("can't use negate operator in this context"))
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65 elif op == 'list':
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66 raise error.ParseError(_("can't use a list in this context"),
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67 hint=_('see hg help "filesets.x or y"'))
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68 raise error.ProgrammingError('illegal tree: %r' % (tree,))
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69
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70 def compile(text):
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71 """generate a function (path, size) -> bool from filter specification.
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72
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73 "text" could contain the operators defined by the fileset language for
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74 common logic operations, and parenthesis for grouping. The supported path
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75 tests are '**.extname' for file extension test, and '"path:dir/subdir"'
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76 for prefix test. The ``size()`` predicate is borrowed from filesets to test
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77 file size. The predicates ``all()`` and ``none()`` are also supported.
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78
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79 '(**.php & size(">10MB")) | **.zip | (path:bin & !path:bin/README)' for
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80 example, will catch all php files whose size is greater than 10 MB, all
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81 files whose name ends with ".zip", and all files under "bin" in the repo
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82 root except for "bin/README".
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83 """
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84 tree = fileset.parse(text)
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85 return _compile(tree)