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| 52 | ||
| 53 | <H1><A NAME="SECTION00101000000000000000000"> | |
| 54 | 10.10 <tt class="module">distutils.dep_util</tt> -- Dependency checking</A> | |
| 55 | </H1> | |
| 56 | <A NAME="module-distutils.deputil"></A> | |
| 57 | ||
| 58 | <P> | |
| 59 | This module provides functions for performing simple, timestamp-based | |
| 60 | dependency of files and groups of files; also, functions based entirely | |
| 61 | on such timestamp dependency analysis. | |
| 62 | ||
| 63 | <P> | |
| 64 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 65 | <td><nobr><b><tt id='l2h-66' xml:id='l2h-66' class="function">newer</tt></b>(</nobr></td> | |
| 66 | <td><var>source, target</var>)</td></tr></table></dt> | |
| 67 | <dd> | |
| 68 | Return true if <var>source</var> exists and is more recently modified than | |
| 69 | <var>target</var>, or if <var>source</var> exists and <var>target</var> doesn't. | |
| 70 | Return false if both exist and <var>target</var> is the same age or newer | |
| 71 | than <var>source</var>. | |
| 72 | Raise <tt class="exception">DistutilsFileError</tt> if <var>source</var> does not exist. | |
| 73 | </dl> | |
| 74 | ||
| 75 | <P> | |
| 76 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 77 | <td><nobr><b><tt id='l2h-67' xml:id='l2h-67' class="function">newer_pairwise</tt></b>(</nobr></td> | |
| 78 | <td><var>sources, targets</var>)</td></tr></table></dt> | |
| 79 | <dd> | |
| 80 | Walk two filename lists in parallel, testing if each source is newer | |
| 81 | than its corresponding target. Return a pair of lists (<var>sources</var>, | |
| 82 | <var>targets</var>) where source is newer than target, according to the semantics | |
| 83 | of <tt class="function">newer()</tt> | |
| 84 | </dl> | |
| 85 | ||
| 86 | <P> | |
| 87 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 88 | <td><nobr><b><tt id='l2h-68' xml:id='l2h-68' class="function">newer_group</tt></b>(</nobr></td> | |
| 89 | <td><var>sources, target</var><big>[</big><var>, missing=<code>'error'</code></var><big>]</big><var></var>)</td></tr></table></dt> | |
| 90 | <dd> | |
| 91 | Return true if <var>target</var> is out-of-date with respect to any file | |
| 92 | listed in <var>sources</var> In other words, if <var>target</var> exists and is newer | |
| 93 | than every file in <var>sources</var>, return false; otherwise return true. | |
| 94 | <var>missing</var> controls what we do when a source file is missing; the | |
| 95 | default (<code>'error'</code>) is to blow up with an <tt class="exception">OSError</tt> from | |
| 96 | inside <tt class="function">os.stat()</tt>; | |
| 97 | if it is <code>'ignore'</code>, we silently drop any missing source files; if it is | |
| 98 | <code>'newer'</code>, any missing source files make us assume that <var>target</var> is | |
| 99 | out-of-date (this is handy in ``dry-run'' mode: it'll make you pretend to | |
| 100 | carry out commands that wouldn't work because inputs are missing, but | |
| 101 | that doesn't matter because you're not actually going to run the | |
| 102 | commands). | |
| 103 | </dl> | |
| 104 | ||
| 105 | <P> | |
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| 137 | </div> | |
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| 139 | <hr /> | |
| 140 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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