Mercurial > hg
annotate mercurial/minifileset.py @ 46779:49fd21f32695
revlog: guarantee that p1 != null if a non-null parent exists
This change does not affect the hashing (which already did this
transformation), but can change the log output in the rare case where
this behavior was observed in repositories. The change can simplify
iteration code where regular changesets and merges are distinct
branches.
Differential Revision: https://phab.mercurial-scm.org/D10150
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Wed, 10 Mar 2021 18:09:21 +0100 |
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children | 6000f5b25c9b |
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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 filesetlang, |
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15 pycompat, |
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16 ) |
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17 |
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18 |
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19 def _sizep(x): |
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20 # i18n: "size" is a keyword |
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21 expr = filesetlang.getstring(x, _(b"size requires an expression")) |
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22 return fileset.sizematcher(expr) |
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23 |
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24 |
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25 def _compile(tree): |
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26 if not tree: |
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27 raise error.ParseError(_(b"missing argument")) |
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28 op = tree[0] |
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29 if op == b'withstatus': |
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30 return _compile(tree[1]) |
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31 elif op in {b'symbol', b'string', b'kindpat'}: |
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32 name = filesetlang.getpattern( |
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33 tree, {b'path'}, _(b'invalid file pattern') |
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34 ) |
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35 if name.startswith(b'**'): # file extension test, ex. "**.tar.gz" |
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36 ext = name[2:] |
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37 for c in pycompat.bytestr(ext): |
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38 if c in b'*{}[]?/\\': |
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39 raise error.ParseError(_(b'reserved character: %s') % c) |
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40 return lambda n, s: n.endswith(ext) |
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41 elif name.startswith(b'path:'): # directory or full path test |
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42 p = name[5:] # prefix |
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43 pl = len(p) |
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44 f = lambda n, s: n.startswith(p) and ( |
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45 len(n) == pl or n[pl : pl + 1] == b'/' |
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46 ) |
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47 return f |
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48 raise error.ParseError( |
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49 _(b"unsupported file pattern: %s") % name, |
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50 hint=_(b'paths must be prefixed with "path:"'), |
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51 ) |
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52 elif op in {b'or', b'patterns'}: |
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53 funcs = [_compile(x) for x in tree[1:]] |
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54 return lambda n, s: any(f(n, s) for f in funcs) |
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55 elif op == b'and': |
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56 func1 = _compile(tree[1]) |
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57 func2 = _compile(tree[2]) |
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58 return lambda n, s: func1(n, s) and func2(n, s) |
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59 elif op == b'not': |
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60 return lambda n, s: not _compile(tree[1])(n, s) |
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61 elif op == b'func': |
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62 symbols = { |
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63 b'all': lambda n, s: True, |
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64 b'none': lambda n, s: False, |
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65 b'size': lambda n, s: _sizep(tree[2])(s), |
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66 } |
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67 |
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68 name = filesetlang.getsymbol(tree[1]) |
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69 if name in symbols: |
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70 return symbols[name] |
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71 |
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72 raise error.UnknownIdentifier(name, symbols.keys()) |
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73 elif op == b'minus': # equivalent to 'x and not y' |
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74 func1 = _compile(tree[1]) |
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75 func2 = _compile(tree[2]) |
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76 return lambda n, s: func1(n, s) and not func2(n, s) |
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77 elif op == b'list': |
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78 raise error.ParseError( |
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79 _(b"can't use a list in this context"), |
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80 hint=_(b'see \'hg help "filesets.x or y"\''), |
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81 ) |
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82 raise error.ProgrammingError(b'illegal tree: %r' % (tree,)) |
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83 |
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84 |
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85 def compile(text): |
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86 """generate a function (path, size) -> bool from filter specification. |
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87 |
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88 "text" could contain the operators defined by the fileset language for |
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89 common logic operations, and parenthesis for grouping. The supported path |
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90 tests are '**.extname' for file extension test, and '"path:dir/subdir"' |
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91 for prefix test. The ``size()`` predicate is borrowed from filesets to test |
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92 file size. The predicates ``all()`` and ``none()`` are also supported. |
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93 |
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94 '(**.php & size(">10MB")) | **.zip | (path:bin & !path:bin/README)' for |
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95 example, will catch all php files whose size is greater than 10 MB, all |
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96 files whose name ends with ".zip", and all files under "bin" in the repo |
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97 root except for "bin/README". |
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98 """ |
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99 tree = filesetlang.parse(text) |
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100 tree = filesetlang.analyze(tree) |
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101 tree = filesetlang.optimize(tree) |
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102 return _compile(tree) |