| 1 | """ |
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| 2 | $Id: graphviz.py 5900 2009-05-30 11:05:08Z cboos $ |
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| 3 | $HeadURL: //trac-hacks.org/svn/graphvizplugin/tags/0.11-0.7.5/graphviz/graphviz.py $ |
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| 4 | |
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| 5 | Copyright (c) 2005, 2006, 2008 Peter Kropf. All rights reserved. |
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| 6 | |
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| 7 | Module documentation goes here. |
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| 8 | """ |
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| 9 | |
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| 10 | |
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| 11 | |
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| 12 | __revision__ = '$LastChangedRevision: 5900 $' |
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| 13 | __id__ = '$Id: graphviz.py 5900 2009-05-30 11:05:08Z cboos $' |
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| 14 | __headurl__ = '$HeadURL: //trac-hacks.org/svn/graphvizplugin/tags/0.11-0.7.5/graphviz/graphviz.py $' |
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| 15 | __docformat__ = 'restructuredtext' |
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| 16 | __version__ = '0.7.5dev' |
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| 17 | |
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| 18 | |
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| 19 | import inspect |
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| 20 | import locale |
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| 21 | import os |
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| 22 | import re |
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| 23 | import sha |
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| 24 | import subprocess |
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| 25 | import sys |
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| 26 | |
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| 27 | from genshi.builder import Element, tag |
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| 28 | from genshi.core import Markup |
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| 29 | |
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| 30 | from trac.config import BoolOption, IntOption, Option |
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| 31 | from trac.core import * |
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| 32 | from trac.mimeview.api import Context, IHTMLPreviewRenderer, MIME_MAP |
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| 33 | from trac.util import escape |
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| 34 | from trac.util.text import to_unicode |
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| 35 | from trac.util.translation import _ |
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| 36 | from trac.web.api import IRequestHandler |
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| 37 | from trac.wiki.api import IWikiMacroProvider |
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| 38 | from trac.wiki.formatter import extract_link |
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| 39 | |
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| 40 | |
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| 41 | class Graphviz(Component): |
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| 42 | """ |
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| 43 | Graphviz (http://trac-hacks.org/wiki/GraphvizPlugin) provides |
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| 44 | a plugin for Trac to render graphviz (http://www.graphviz.org/) |
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| 45 | drawings within a Trac wiki page. |
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| 46 | """ |
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| 47 | implements(IWikiMacroProvider, IHTMLPreviewRenderer, IRequestHandler) |
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| 48 | |
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| 49 | # Available formats and processors, default first (dot/png) |
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| 50 | Processors = ['dot', 'neato', 'twopi', 'circo', 'fdp'] |
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| 51 | Bitmap_Formats = ['png', 'jpg', 'gif'] |
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| 52 | Vector_Formats = ['svg', 'svgz'] |
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| 53 | Formats = Bitmap_Formats + Vector_Formats |
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| 54 | Cmd_Paths = { |
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| 55 | 'linux2': ['/usr/bin', |
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| 56 | '/usr/local/bin',], |
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| 57 | |
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| 58 | 'win32': ['c:\\Program Files\\Graphviz\\bin', |
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| 59 | 'c:\\Program Files\\ATT\\Graphviz\\bin', |
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| 60 | ], |
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| 61 | |
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| 62 | 'freebsd6': ['/usr/local/bin', |
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| 63 | ], |
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| 64 | |
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| 65 | 'freebsd5': ['/usr/local/bin', |
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| 66 | ], |
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| 67 | |
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| 68 | 'darwin': ['/opt/local/bin', |
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| 69 | '/sw/bin',], |
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| 70 | |
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| 71 | } |
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| 72 | |
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| 73 | # Note: the following options named "..._option" are those which need |
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| 74 | # some additional processing, see `_load_config()` below. |
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| 75 | |
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| 76 | DEFAULT_CACHE_DIR = 'gvcache' |
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| 77 | |
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| 78 | cache_dir_option = Option("graphviz", "cache_dir", DEFAULT_CACHE_DIR, |
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| 79 | """The directory that will be used to cache the generated images. |
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| 80 | Note that if different than the default (`%s`), this directory must |
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| 81 | exist. |
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| 82 | If not given as an absolute path, the path will be relative to |
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| 83 | the Trac environment's directory. |
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| 84 | """ % DEFAULT_CACHE_DIR) |
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| 85 | |
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| 86 | encoding = Option("graphviz", "encoding", 'utf-8', |
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| 87 | """The encoding which should be used for communicating with |
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| 88 | Graphviz (should match `-Gcharset` if given). |
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| 89 | """) |
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| 90 | |
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| 91 | cmd_path = Option("graphviz", "cmd_path", '', |
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| 92 | r"""Full path to the directory where the graphviz |
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| 93 | programs are located. If not specified, the |
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| 94 | default is `/usr/bin` on Linux, |
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| 95 | `C:\Program Files\ATT\Graphviz\bin` on Windows and |
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| 96 | `/usr/local/bin` on FreeBSD 6. |
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| 97 | """) |
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| 98 | |
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| 99 | out_format = Option("graphviz", "out_format", Formats[0], |
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| 100 | """Graph output format. Valid formats are: png, jpg, |
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| 101 | svg, svgz, gif. If not specified, the default is |
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| 102 | png. This setting can be overrided on a per-graph |
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| 103 | basis. |
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| 104 | """) |
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| 105 | |
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| 106 | processor = Option("graphviz", "processor", Processors[0], |
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| 107 | """Graphviz default processor. Valid processors |
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| 108 | are: dot, neato, twopi, fdp, circo. If not |
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| 109 | specified, the default is dot. This setting can |
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| 110 | be overrided on a per-graph basis. |
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| 111 | |
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| 112 | !GraphvizMacro will verify that the default |
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| 113 | processor is installed and will not work if it |
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| 114 | is missing. All other processors are optional. |
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| 115 | If any of the other processors are missing, a |
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| 116 | warning message will be sent to the trac log and |
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| 117 | !GraphvizMacro will continue to work. |
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| 118 | """) |
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| 119 | |
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| 120 | png_anti_alias = BoolOption("graphviz", "png_antialias", False, |
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| 121 | """If this entry exists in the configuration file, |
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| 122 | then PNG outputs will be antialiased. |
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| 123 | Note that this requires `rsvg` to be installed. |
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| 124 | """) |
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| 125 | |
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| 126 | rsvg_path_option = Option("graphviz", "rsvg_path", "", |
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| 127 | """Full path to the rsvg program (including the filename). |
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| 128 | The default is `<cmd_path>/rsvg`. |
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| 129 | """) |
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| 130 | |
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| 131 | cache_manager = BoolOption("graphviz", "cache_manager", False, |
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| 132 | """If this entry exists and set to true in the configuration file, |
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| 133 | then the cache management logic will be invoked |
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| 134 | and the cache_max_size, cache_min_size, |
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| 135 | cache_max_count and cache_min_count must be |
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| 136 | defined. |
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| 137 | """) |
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| 138 | |
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| 139 | cache_max_size = IntOption("graphviz", "cache_max_size", 1024*1024*10, |
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| 140 | """The maximum size in bytes that the cache should |
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| 141 | consume. This is the high watermark for disk space |
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| 142 | used. |
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| 143 | """) |
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| 144 | |
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| 145 | cache_min_size = IntOption("graphviz", "cache_min_size", 1024*1024*5, |
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| 146 | """When cleaning out the cache, remove files until |
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| 147 | this size in bytes is used by the cache. This is |
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| 148 | the low watermark for disk space used. |
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| 149 | """) |
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| 150 | |
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| 151 | cache_max_count = IntOption("graphviz", "cache_max_count", 2000, |
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| 152 | """The maximum number of files that the cache should |
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| 153 | contain. This is the high watermark for the |
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| 154 | directory entry count. |
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| 155 | """) |
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| 156 | |
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| 157 | cache_min_count = IntOption("graphviz", "cache_min_count", 1500, |
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| 158 | """The minimum number of files that the cache should |
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| 159 | contain. This is the low watermark for the |
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| 160 | directory entry count. |
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| 161 | """) |
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| 162 | |
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| 163 | dpi = IntOption('graphviz', 'default_graph_dpi', 96, |
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| 164 | """Default dpi setting for graphviz, used during SVG to PNG |
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| 165 | rasterization. |
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| 166 | """) |
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| 167 | |
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| 168 | |
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| 169 | def __init__(self): |
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| 170 | self.log.info('version: %s - id: %s' % (__version__, str(__id__))) |
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| 171 | #self.log.info('processors: %s' % str(Graphviz.Processors)) |
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| 172 | #self.log.info('formats: %s' % str(Graphviz.Formats)) |
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| 173 | |
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| 174 | |
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| 175 | # IHTMLPreviewRenderer methods |
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| 176 | |
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| 177 | MIME_TYPES = ('application/graphviz') |
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| 178 | |
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| 179 | def get_quality_ratio(self, mimetype): |
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| 180 | if mimetype in self.MIME_TYPES: |
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| 181 | return 2 |
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| 182 | return 0 |
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| 183 | |
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| 184 | def render(self, context, mimetype, content, filename=None, url=None): |
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| 185 | ext = filename.split('.')[1] |
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| 186 | name = ext == 'graphviz' and 'graphviz' or 'graphviz.%s' % ext |
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| 187 | text = hasattr(content, 'read') and content.read() or content |
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| 188 | return self.expand_macro(context, name, text) |
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| 189 | |
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| 190 | |
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| 191 | # IRequestHandler methods |
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| 192 | |
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| 193 | def match_request(self, req): |
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| 194 | return req.path_info.startswith('/graphviz') |
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| 195 | |
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| 196 | |
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| 197 | def process_request(self, req): |
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| 198 | # check and load the configuration |
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| 199 | errmsg = self._load_config() |
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| 200 | if errmsg: |
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| 201 | return self._error_div(errmsg) |
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| 202 | |
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| 203 | pieces = [item for item in req.path_info.split('/graphviz') if item] |
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| 204 | |
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| 205 | if pieces: |
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| 206 | pieces = [item for item in pieces[0].split('/') if item] |
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| 207 | |
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| 208 | if pieces: |
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| 209 | name = pieces[0] |
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| 210 | img_path = os.path.join(self.cache_dir, name) |
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| 211 | return req.send_file(img_path) |
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| 212 | |
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| 213 | # IWikiMacroProvider methods |
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| 214 | |
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| 215 | def get_macros(self): |
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| 216 | """Return an iterable that provides the names of the provided macros.""" |
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| 217 | self._load_config() |
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| 218 | for p in ['.' + p for p in Graphviz.Processors] + ['']: |
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| 219 | for f in ['/' + f for f in Graphviz.Formats] + ['']: |
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| 220 | yield 'graphviz%s%s' % (p, f) |
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| 221 | |
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| 222 | |
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| 223 | def get_macro_description(self, name): |
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| 224 | """ |
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| 225 | Return a plain text description of the macro with the |
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| 226 | specified name. Only return a description for the base |
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| 227 | graphviz macro. All the other variants (graphviz/png, |
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| 228 | graphviz/svg, etc.) will have no description. This will |
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| 229 | cleanup the WikiMacros page a bit. |
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| 230 | """ |
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| 231 | if name == 'graphviz': |
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| 232 | return inspect.getdoc(Graphviz) |
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| 233 | else: |
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| 234 | return None |
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| 235 | |
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| 236 | |
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| 237 | def expand_macro(self, formatter_or_context, name, content): |
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| 238 | """Return the HTML output of the macro. |
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| 239 | |
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| 240 | :param formatter_or_context: a Formatter when called as a macro, |
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| 241 | a Context when called by `GraphvizPlugin.render` |
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| 242 | |
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| 243 | :param name: Wiki macro command that resulted in this method being |
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| 244 | called. In this case, it should be 'graphviz', followed |
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| 245 | (or not) by the processor name, then by an output |
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| 246 | format, as following: graphviz.<processor>/<format> |
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| 247 | |
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| 248 | Valid processor names are: dot, neato, twopi, circo, |
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| 249 | and fdp. The default is dot. |
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| 250 | |
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| 251 | Valid output formats are: jpg, png, gif, svg and svgz. |
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| 252 | The default is the value specified in the out_format |
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| 253 | configuration parameter. If out_format is not specified |
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| 254 | in the configuration, then the default is png. |
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| 255 | |
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| 256 | examples: graphviz.dot/png -> dot png |
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| 257 | graphviz.neato/jpg -> neato jpg |
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| 258 | graphviz.circo -> circo png |
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| 259 | graphviz/svg -> dot svg |
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| 260 | |
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| 261 | :param content: The text the user entered for the macro to process. |
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| 262 | """ |
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| 263 | # check and load the configuration |
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| 264 | errmsg = self._load_config() |
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| 265 | if errmsg: |
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| 266 | return self._error_div(errmsg) |
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| 267 | |
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| 268 | ## Extract processor and format from name |
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| 269 | processor = out_format = None |
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| 270 | |
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| 271 | # first try with the RegExp engine |
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| 272 | try: |
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| 273 | m = re.match('graphviz\.?([a-z]*)\/?([a-z]*)', name) |
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| 274 | (processor, out_format) = m.group(1, 2) |
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| 275 | |
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| 276 | # or use the string.split method |
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| 277 | except: |
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| 278 | (d_sp, s_sp) = (name.split('.'), name.split('/')) |
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| 279 | if len(d_sp) > 1: |
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| 280 | s_sp = d_sp[1].split('/') |
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| 281 | if len(s_sp) > 1: |
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| 282 | out_format = s_sp[1] |
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| 283 | processor = s_sp[0] |
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| 284 | elif len(s_sp) > 1: |
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| 285 | out_format = s_sp[1] |
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| 286 | |
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| 287 | # assign default values, if instance ones are empty |
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| 288 | if not out_format: |
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| 289 | out_format = self.out_format |
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| 290 | if not processor: |
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| 291 | processor = self.processor |
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| 292 | |
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| 293 | if processor in Graphviz.Processors: |
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| 294 | proc_cmd = self.cmds[processor] |
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| 295 | |
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| 296 | else: |
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| 297 | self.log.error('render_macro: requested processor (%s) not found.' % |
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| 298 | processor) |
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| 299 | return self._error_div('requested processor (%s) not found.' % |
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| 300 | processor) |
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| 301 | |
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| 302 | if out_format not in Graphviz.Formats: |
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| 303 | self.log.error('render_macro: requested format (%s) not found.' % |
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| 304 | out_format) |
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| 305 | return self._error_div( |
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| 306 | tag.p(_("Graphviz macro processor error: " |
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| 307 | "requested format (%(fmt)s) not valid.", |
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| 308 | fmt=out_format))) |
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| 309 | |
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| 310 | encoded_cmd = (processor + unicode(self.processor_options)) \ |
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| 311 | .encode(self.encoding) |
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| 312 | encoded_content = content.encode(self.encoding) |
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| 313 | sha_key = sha.new(encoded_cmd + encoded_content).hexdigest() |
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| 314 | img_name = '%s.%s.%s' % (sha_key, processor, out_format) |
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| 315 | # cache: hash.<dot>.<png> |
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| 316 | img_path = os.path.join(self.cache_dir, img_name) |
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| 317 | map_name = '%s.%s.map' % (sha_key, processor) |
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| 318 | # cache: hash.<dot>.map |
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| 319 | map_path = os.path.join(self.cache_dir, map_name) |
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| 320 | |
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| 321 | # Check for URL="" presence in graph code |
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| 322 | URL_in_graph = 'URL=' in content |
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| 323 | |
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| 324 | # Create image if not in cache |
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| 325 | if not os.path.exists(img_path): |
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| 326 | self._clean_cache() |
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| 327 | |
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| 328 | if URL_in_graph: # translate wiki TracLinks in URL |
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| 329 | if isinstance(formatter_or_context, Context): |
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| 330 | context = formatter_or_context |
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| 331 | else: |
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| 332 | context = formatter_or_context.context |
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| 333 | content = self._expand_wiki_links(context, out_format, |
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| 334 | content) |
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| 335 | encoded_content = content.encode(self.encoding) |
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| 336 | |
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| 337 | # Antialias PNGs with rsvg, if requested |
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| 338 | if out_format == 'png' and self.png_anti_alias == True: |
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| 339 | # 1. SVG output |
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| 340 | failure, errmsg = self._launch( |
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| 341 | encoded_content, proc_cmd, '-Tsvg', |
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| 342 | '-o%s.svg' % img_path, *self.processor_options) |
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| 343 | if failure: |
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| 344 | return self._error_div(errmsg) |
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| 345 | |
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| 346 | # 2. SVG to PNG rasterization |
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| 347 | failure, errmsg = self._launch( |
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| 348 | None, self.rsvg_path, '--dpi-x=%d' % self.dpi, |
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| 349 | '--dpi-y=%d' % self.dpi, '%s.svg' % img_path, img_path) |
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| 350 | if failure: |
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| 351 | return self._error_div(errmsg) |
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| 352 | |
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| 353 | else: # Render other image formats |
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| 354 | failure, errmsg = self._launch( |
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| 355 | encoded_content, proc_cmd, '-T%s' % out_format, |
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| 356 | '-o%s' % img_path, *self.processor_options) |
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| 357 | if failure: |
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| 358 | return self._error_div(errmsg) |
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| 359 | |
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| 360 | # Generate a map file for binary formats |
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| 361 | if URL_in_graph and out_format in Graphviz.Bitmap_Formats: |
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| 362 | |
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| 363 | # Create the map if not in cache |
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| 364 | if not os.path.exists(map_path): |
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| 365 | failure, errmsg = self._launch( |
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| 366 | encoded_content, proc_cmd, '-Tcmap', |
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| 367 | '-o%s' % map_path, *self.processor_options) |
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| 368 | if failure: |
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| 369 | return self._error_div(errmsg) |
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| 370 | |
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| 371 | if errmsg: |
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| 372 | # there was a warning. Ideally we should be able to use |
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| 373 | # `add_warning` here, but that's not possible as the warnings |
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| 374 | # are already emitted at this point in the template processing |
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| 375 | return self._error_div(errmsg) |
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| 376 | |
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| 377 | # Generate HTML output |
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| 378 | img_url = formatter_or_context.href.graphviz(img_name) |
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| 379 | # for SVG(z) |
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| 380 | if out_format in Graphviz.Vector_Formats: |
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| 381 | try: # try to get SVG dimensions |
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| 382 | f = open(img_path, 'r') |
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| 383 | svg = f.readlines(1024) # don't read all |
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| 384 | f.close() |
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| 385 | svg = "".join(svg).replace('\n', '') |
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| 386 | w = re.search('width="([0-9]+)(.*?)" ', svg) |
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| 387 | h = re.search('height="([0-9]+)(.*?)"', svg) |
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| 388 | (w_val, w_unit) = w.group(1,2) |
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| 389 | (h_val, h_unit) = h.group(1,2) |
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| 390 | # Graphviz seems to underestimate height/width for SVG images, |
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| 391 | # so we have to adjust them. |
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| 392 | # The correction factor seems to be constant. |
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| 393 | w_val, h_val = [1.35 * float(x) for x in (w_val, h_val)] |
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| 394 | width = unicode(w_val) + w_unit |
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| 395 | height = unicode(h_val) + h_unit |
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| 396 | except ValueError: |
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| 397 | width = height = '100%' |
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| 398 | |
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| 399 | # insert SVG, IE compatibility |
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| 400 | return tag.object( |
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| 401 | tag.embed(src=img_url, type="image/svg+xml", |
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| 402 | width=width, height=height), |
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| 403 | data=img_url, type="image/svg+xml", |
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| 404 | width=width, height=height) |
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| 405 | |
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| 406 | # for binary formats, add map |
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| 407 | elif URL_in_graph and os.path.exists(map_path): |
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| 408 | f = open(map_path, 'r') |
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| 409 | map = f.readlines() |
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| 410 | f.close() |
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| 411 | map = "".join(map).replace('\n', '') |
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| 412 | return tag(tag.map(Markup(map), id='G'+sha_key, name='G'+sha_key), |
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| 413 | tag.img(src=img_url, usemap="#G"+sha_key, |
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| 414 | alt=_("GraphViz image"))) |
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| 415 | else: |
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| 416 | return tag.img(src=img_url, alt=_("GraphViz image")) |
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| 417 | |
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| 418 | |
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| 419 | # Private methods |
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| 420 | |
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| 421 | def _expand_wiki_links(self, context, out_format, content): |
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| 422 | """Expand TracLinks that follow all URL= patterns.""" |
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| 423 | def expand(match): |
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| 424 | wiki_text = match.groups()[0] # TracLink ([1], source:file/, ...) |
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| 425 | link = extract_link(self.env, context, wiki_text) |
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| 426 | if isinstance(link, Element): |
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| 427 | href = link.attrib.get('href') |
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| 428 | name = link.children |
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| 429 | description = link.attrib.get('title', '') |
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| 430 | else: |
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| 431 | href = wiki_text |
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| 432 | description = None |
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| 433 | if out_format == 'svg': |
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| 434 | format = 'URL="javascript:window.parent.location.href=\'%s\'"' |
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| 435 | else: |
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| 436 | format = 'URL="%s"' |
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| 437 | url = format % href |
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| 438 | if description: |
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| 439 | url += '\ntooltip="%s"' % description \ |
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| 440 | .replace('"', '').replace('\n', '') |
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| 441 | return url |
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| 442 | return re.sub(r'URL="(.*?)"', expand, content) |
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| 443 | |
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| 444 | def _load_config(self): |
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| 445 | """Preprocess the graphviz trac.ini configuration.""" |
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| 446 | |
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| 447 | # if 'graphviz' not in self.config.sections(): |
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| 448 | # ... so what? the defaults might be good enough |
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| 449 | |
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| 450 | # check for the cache_dir entry |
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| 451 | self.cache_dir = self.cache_dir_option |
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| 452 | if not self.cache_dir: |
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| 453 | return _("The [graphviz] section is missing the cache_dir field.") |
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| 454 | |
|---|
| 455 | if not os.path.isabs(self.cache_dir): |
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| 456 | self.cache_dir = os.path.join(self.env.path, self.cache_dir) |
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| 457 | |
|---|
| 458 | if not os.path.exists(self.cache_dir): |
|---|
| 459 | if self.cache_dir_option == self.DEFAULT_CACHE_DIR: |
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| 460 | os.mkdir(self.cache_dir) |
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| 461 | else: |
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| 462 | return _("The cache_dir '%(path)s' doesn't exist, " |
|---|
| 463 | "please create it.", path=self.cache_dir) |
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| 464 | |
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| 465 | # Get optional configuration parameters from trac.ini. |
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| 466 | |
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| 467 | # check for the cmd_path entry and setup the various command paths |
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| 468 | cmd_paths = Graphviz.Cmd_Paths.get(sys.platform, []) |
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| 469 | |
|---|
| 470 | if self.cmd_path: |
|---|
| 471 | if not os.path.exists(self.cmd_path): |
|---|
| 472 | return _("The '[graphviz] cmd_path' configuration entry " |
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| 473 | "is set to '%(path)s' but that path does not exist.", |
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| 474 | path=self.cmd_path) |
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| 475 | cmd_paths = [self.cmd_path] |
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| 476 | |
|---|
| 477 | if not cmd_paths: |
|---|
| 478 | return _("The '[graphviz] cmd_path' configuration entry " |
|---|
| 479 | "is not set and there is no default for %(platform)s.", |
|---|
| 480 | platform=sys.platform) |
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| 481 | |
|---|
| 482 | self.cmds = {} |
|---|
| 483 | pname = self._find_cmd(self.processor, cmd_paths) |
|---|
| 484 | if not pname: |
|---|
| 485 | return _("The default processor '%(proc)s' was not found " |
|---|
| 486 | "in '%(paths)s'.", proc=self.processor, paths=cmd_paths) |
|---|
| 487 | |
|---|
| 488 | for name in Graphviz.Processors: |
|---|
| 489 | pname = self._find_cmd(name, cmd_paths) |
|---|
| 490 | |
|---|
| 491 | if not pname: |
|---|
| 492 | self.log.warn('The %s program was not found. ' |
|---|
| 493 | 'The graphviz/%s macro will be disabled.' % |
|---|
| 494 | (pname, name)) |
|---|
| 495 | Graphviz.Processors.remove(name) |
|---|
| 496 | |
|---|
| 497 | self.cmds[name] = pname |
|---|
| 498 | |
|---|
| 499 | if self.png_anti_alias: |
|---|
| 500 | self.rsvg_path = (self.rsvg_path_option or |
|---|
| 501 | self._find_cmd('rsvg', cmd_paths)) |
|---|
| 502 | if not (self.rsvg_path and os.path.exists(self.rsvg_path)): |
|---|
| 503 | return _("The rsvg program is set to '%(path)s' but that path " |
|---|
| 504 | "does not exist.", path=self.rsvg_path) |
|---|
| 505 | |
|---|
| 506 | # get default graph/node/edge attributes |
|---|
| 507 | self.processor_options = [] |
|---|
| 508 | defaults = [opt for opt in self.config.options('graphviz') |
|---|
| 509 | if opt[0].startswith('default_')] |
|---|
| 510 | for name, value in defaults: |
|---|
| 511 | for prefix, optkey in [ |
|---|
| 512 | ('default_graph_', '-G'), |
|---|
| 513 | ('default_node_', '-N'), |
|---|
| 514 | ('default_edge_', '-E')]: |
|---|
| 515 | if name.startswith(prefix): |
|---|
| 516 | self.processor_options.append("%s%s=%s" % |
|---|
| 517 | (optkey, name.replace(prefix,''), value)) |
|---|
| 518 | |
|---|
| 519 | # setup mimetypes to support the IHTMLPreviewRenderer interface |
|---|
| 520 | if 'graphviz' not in MIME_MAP: |
|---|
| 521 | MIME_MAP['graphviz'] = 'application/graphviz' |
|---|
| 522 | for processor in Graphviz.Processors: |
|---|
| 523 | if processor not in MIME_MAP: |
|---|
| 524 | MIME_MAP[processor] = 'application/graphviz' |
|---|
| 525 | |
|---|
| 526 | def _launch(self, encoded_input, *args): |
|---|
| 527 | """Launch a process (cmd), and returns exitcode, stdout + stderr""" |
|---|
| 528 | # Note: subprocess.Popen doesn't support unicode options arguments |
|---|
| 529 | # (http://bugs.python.org/issue1759845) so we have to encode them. |
|---|
| 530 | # Anyway, dot expects utf-8 or the encoding specified with -Gcharset. |
|---|
| 531 | encoded_cmd = [] |
|---|
| 532 | for arg in args: |
|---|
| 533 | if isinstance(arg, unicode): |
|---|
| 534 | arg = arg.encode(self.encoding, 'replace') |
|---|
| 535 | encoded_cmd.append(arg) |
|---|
| 536 | p = subprocess.Popen(encoded_cmd, stdin=subprocess.PIPE, |
|---|
| 537 | stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
|---|
| 538 | if encoded_input: |
|---|
| 539 | p.stdin.write(encoded_input) |
|---|
| 540 | p.stdin.close() |
|---|
| 541 | out = p.stdout.read() |
|---|
| 542 | err = p.stderr.read() |
|---|
| 543 | failure = p.wait() != 0 |
|---|
| 544 | if failure or err or out: |
|---|
| 545 | return (failure, tag.p(tag.br(), _("The command:"), |
|---|
| 546 | tag.pre(repr(' '.join(encoded_cmd))), |
|---|
| 547 | (_("succeeded but emitted the following output:"), |
|---|
| 548 | _("failed with the following output:"))[failure], |
|---|
| 549 | out and tag.pre(repr(out)), |
|---|
| 550 | err and tag.pre(repr(err)))) |
|---|
| 551 | else: |
|---|
| 552 | return (False, None) |
|---|
| 553 | |
|---|
| 554 | def _error_div(self, msg): |
|---|
| 555 | """Display msg in an error box, using Trac style.""" |
|---|
| 556 | if isinstance(msg, str): |
|---|
| 557 | msg = to_unicode(msg) |
|---|
| 558 | self.log.error(msg) |
|---|
| 559 | if isinstance(msg, unicode): |
|---|
| 560 | msg = tag.pre(escape(msg)) |
|---|
| 561 | return tag.div( |
|---|
| 562 | tag.strong(_("Graphviz macro processor has detected an error. " |
|---|
| 563 | "Please fix the problem before continuing.")), |
|---|
| 564 | msg, class_="system-message") |
|---|
| 565 | |
|---|
| 566 | def _clean_cache(self): |
|---|
| 567 | """ |
|---|
| 568 | The cache manager (clean_cache) is an attempt at keeping the |
|---|
| 569 | cache directory under control. When the cache manager |
|---|
| 570 | determines that it should clean up the cache, it will delete |
|---|
| 571 | files based on the file access time. The files that were least |
|---|
| 572 | accessed will be deleted first. |
|---|
| 573 | |
|---|
| 574 | The graphviz section of the trac configuration file should |
|---|
| 575 | have an entry called cache_manager to enable the cache |
|---|
| 576 | cleaning code. If it does, then the cache_max_size, |
|---|
| 577 | cache_min_size, cache_max_count and cache_min_count entries |
|---|
| 578 | must also be there. |
|---|
| 579 | """ |
|---|
| 580 | |
|---|
| 581 | if self.cache_manager: |
|---|
| 582 | |
|---|
| 583 | # os.stat gives back a tuple with: st_mode(0), st_ino(1), |
|---|
| 584 | # st_dev(2), st_nlink(3), st_uid(4), st_gid(5), |
|---|
| 585 | # st_size(6), st_atime(7), st_mtime(8), st_ctime(9) |
|---|
| 586 | |
|---|
| 587 | entry_list = {} |
|---|
| 588 | atime_list = {} |
|---|
| 589 | size_list = {} |
|---|
| 590 | count = 0 |
|---|
| 591 | size = 0 |
|---|
| 592 | |
|---|
| 593 | for name in os.listdir(self.cache_dir): |
|---|
| 594 | #self.log.debug('clean_cache.entry: %s' % name) |
|---|
| 595 | entry_list[name] = os.stat(os.path.join(self.cache_dir, name)) |
|---|
| 596 | |
|---|
| 597 | atime_list.setdefault(entry_list[name][7], []).append(name) |
|---|
| 598 | count = count + 1 |
|---|
| 599 | |
|---|
| 600 | size_list.setdefault(entry_list[name][6], []).append(name) |
|---|
| 601 | size = size + entry_list[name][6] |
|---|
| 602 | |
|---|
| 603 | atime_keys = atime_list.keys() |
|---|
| 604 | atime_keys.sort() |
|---|
| 605 | |
|---|
| 606 | #self.log.debug('clean_cache.atime_keys: %s' % atime_keys) |
|---|
| 607 | #self.log.debug('clean_cache.count: %d' % count) |
|---|
| 608 | #self.log.debug('clean_cache.size: %d' % size) |
|---|
| 609 | |
|---|
| 610 | # In the spirit of keeping the code fairly simple, the |
|---|
| 611 | # clearing out of files from the cache directory may |
|---|
| 612 | # result in the count dropping below cache_min_count if |
|---|
| 613 | # multiple entries are have the same last access |
|---|
| 614 | # time. Same for cache_min_size. |
|---|
| 615 | if count > self.cache_max_count or size > self.cache_max_size: |
|---|
| 616 | while atime_keys and (self.cache_min_count < count or |
|---|
| 617 | self.cache_min_size < size): |
|---|
| 618 | key = atime_keys.pop(0) |
|---|
| 619 | for file in atime_list[key]: |
|---|
| 620 | os.unlink(os.path.join(self.cache_dir, file)) |
|---|
| 621 | count = count - 1 |
|---|
| 622 | size = size - entry_list[file][6] |
|---|
| 623 | |
|---|
| 624 | def _find_cmd(self, cmd, paths): |
|---|
| 625 | exe_suffix = '' |
|---|
| 626 | if sys.platform == 'win32': |
|---|
| 627 | exe_suffix = '.exe' |
|---|
| 628 | |
|---|
| 629 | for path in paths: |
|---|
| 630 | p = os.path.join(path, cmd) + exe_suffix |
|---|
| 631 | if os.path.exists(p): |
|---|
| 632 | return p |
|---|
