Mercurial > p > roundup > code
annotate doc/developers.txt @ 5991:b0940ad50f43
issue2551075 Update jinja template to bootstrap 4.
Updated to 4.1.3 (current boostrap version 4.4.1). The pull request
has been around for a while. (Patch: Paul Spooner; templates merged
by Christof Meerwald; other merged by John Rouillard)
| author | John Rouillard <rouilj@ieee.org> |
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| date | Fri, 20 Dec 2019 20:47:19 -0500 |
| parents | 29d428927362 |
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1 ================== |
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2 Developing Roundup |
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3 ================== |
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4 |
| 2409 | 5 .. note:: |
| 6 The intended audience of this document is the developers of the core | |
| 7 Roundup code. If you just wish to alter some behaviour of your Roundup | |
| 8 installation, see `customising roundup`_. | |
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9 |
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10 Contents |
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11 |
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12 .. contents:: |
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13 :local: |
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14 |
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15 Getting Started |
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16 --------------- |
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17 |
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18 Anyone wishing to help in the development of Roundup must read `Roundup's |
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19 Design Document`_ and the `implementation notes`_. |
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20 |
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21 All development is coordinated through two resources: |
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22 |
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23 - roundup-devel mailing list at |
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24 https://sourceforge.net/projects/roundup/lists/roundup-devel |
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25 - The issue tracker running at |
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26 https://issues.roundup-tracker.org/ |
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27 |
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28 Website, wiki |
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29 ------------- |
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30 |
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31 The website is in our repository, so is the configuration of the wiki. |
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32 Please check the README.txt in the "website" subdirectory |
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33 of a current checkout. |
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34 |
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35 Issue Tracker |
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36 ------------- |
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37 |
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38 The tracker resides on bugs.ams1.psf.io (188.166.48.69). You can also |
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39 ssh to issues.roundup-tracker.org. They have the same fingerprint: |
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40 |
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41 ED25519 key fingerprint is f1:f7:3d:bf:3b:01:8d:e1:4e:30:b3:0f:6e:98:b8:9b. |
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42 |
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43 The roundup installation belongs to the user roundup. |
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44 The setup uses virtualenv. Use the python version: |
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45 |
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46 /srv/roundup/env/bin/python2.7 |
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47 |
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48 to get a python with roundup on the PYTHONPATH. |
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49 |
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50 The Roundup tracker https://issues.roundup-tracker.org/ is in |
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51 /srv/roundup/trackers/roundup/ with the database set to |
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52 /srv/roundup/data/roundup/. Note that postgres is used for the |
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53 backend, so the database directory above is used for msgs and files. |
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54 |
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55 Source is in: /srv/roundup/src/ |
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56 |
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57 Roundup is run using gunicorn and wsgi. |
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58 |
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59 You have 'sudo -u roundup' access if you need to run things as the |
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60 roundup user. |
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61 |
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62 The configuration is in the "website/issues" section of Roundup's |
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63 Mercurical SCM repository and copied manually to the live tracker. |
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64 |
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65 * get a working copy of roundup/website/issues from the SCM, either via |
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66 hg clone https://hg.code.sf.net/p/roundup/code |
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67 or download a snapshot: |
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68 https://sourceforge.net/p/roundup/code/ci/default/tarball |
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69 |
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70 * check the differences |
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71 diff -ur /srv/roundup/trackers/roundup/ roundup/website/issues/ |
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72 |
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73 Copy differences using 'sudo -u roundup ...'. |
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74 |
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75 Getting a user account |
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76 ~~~~~~~~~~~~~~~~~~~~~~ |
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77 |
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78 To get access to the host, submit a pull request for: |
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79 |
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80 https://github.com/python/psf-salt |
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81 |
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82 by forking the repo, make a change similar to: |
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83 |
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84 https://github.com/rouilj/psf-salt/commit/2aa55d0fc5a343f45f5507437d3fba077cbaf852 |
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85 |
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86 and submit it as a pull request. Contact ewdurbin via #roundup IRC or by |
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87 adding an issue to the master psf-salt repo. |
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88 |
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89 |
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90 Small Changes |
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91 ------------- |
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92 |
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93 Most small changes can be submitted as patches through the |
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94 `issue tracker`_ or sent to `roundup-devel mailing list`_. |
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95 |
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96 |
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97 Source Repository Access |
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98 ------------------------ |
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99 |
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100 See http://www.roundup-tracker.org/code.html. |
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101 For all other questions ask on the development mailinglist. |
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102 |
| 935 | 103 |
| 104 Project Rules | |
| 105 ------------- | |
| 106 | |
| 107 Mostly the project follows Guido's Style (though naming tends to be a little | |
| 108 relaxed sometimes). In short: | |
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109 |
| 935 | 110 - 80 column width code |
| 111 - 4-space indentations | |
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112 - All modules must have an Id line near the top |
| 935 | 113 |
| 114 Other project rules: | |
| 115 | |
| 116 - New functionality must be documented, even briefly (so at least we know | |
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117 where there's missing documentation) and changes to tracker configuration |
| 935 | 118 must be logged in the upgrading document. |
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119 - subscribe to roundup-checkins to receive checkin notifications from the |
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120 other developers with write access to the source-code repository. |
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121 - discuss any changes with the other developers on roundup-dev. If nothing |
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122 else, this makes sure there's no rude shocks |
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123 - write unit tests for changes you make (where possible), and ensure that |
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124 all unit tests run before committing changes |
| 935 | 125 - run pychecker over changed code |
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126 |
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127 The administrators of the project reserve the right to boot developers who |
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128 consistently check in code which is either broken or takes the codebase in |
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129 directions that have not been agreed to. |
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130 |
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131 |
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132 Debugging Aids |
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133 -------------- |
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134 |
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135 See :doc:`debugging <debugging>`. |
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136 |
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137 Internationalization Notes |
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138 -------------------------- |
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139 |
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140 How stuff works: |
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141 |
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142 1. Strings that may require translation (messages in human language) |
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143 are marked in the source code. This step is discussed in |
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144 `Marking Strings for Translation`_ section. |
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145 |
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146 2. These strings are all extracted into Message Template File |
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147 ``locale/roundup.pot`` (_`POT` file). See `Extracting Translatable |
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148 Messages`_ below. |
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149 |
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150 3. Language teams use POT file to make Message Files for national |
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151 languages (_`PO` files). All PO files for Roundup are kept in |
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152 the ``locale`` directory. Names of these files are target |
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153 locale names, usually just 2-letter language codes. `Translating |
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154 Messages`_ section of this chapter gives useful hints for |
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155 message translators. |
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156 |
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157 4. Translated Message Files are compiled into binary form (_`MO` files) |
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158 and stored in ``locale`` directory (but not kept in the source code |
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159 repository, as they may be easily made from PO files). |
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160 See `Compiling Message Catalogs`_ section. |
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161 |
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162 5. Roundup installer creates runtime locale structure on the file |
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163 system, putting MO files in their appropriate places. |
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164 |
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165 6. Runtime internationalization (_`I18N`) services use these MO files |
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166 to translate program messages into language selected by current |
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167 Roundup user. Roundup command line interface uses locale name |
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168 set in OS environment variable ``LANGUAGE``, ``LC_ALL``, |
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169 ``LC_MESSAGES``, or ``LANG`` (in that order). Roundup Web User |
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170 Interface uses language selected by currently authenticated user. |
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171 |
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172 Additional details may be found in `GNU gettext`_ and Python `gettext |
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173 module`_ documentation. |
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174 |
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175 `Roundup source distribution`_ includes POT and PO files for message |
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176 translators, and also pre-built MO files to facilitate installations |
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177 from source. Roundup binary distribution includes MO files only. |
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178 |
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179 .. _GNU gettext: |
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180 |
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181 GNU gettext package |
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182 ~~~~~~~~~~~~~~~~~~~ |
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183 |
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184 This chapter is full of references to GNU `gettext package`_. |
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185 GNU gettext is a "must have" for nearly all steps of internationalizing |
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186 any program, and it's manual is definetely a recommended reading |
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187 for people involved in `I18N`_. |
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188 |
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189 There are GNU gettext ports to all major OS platforms. |
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190 Windows binaries are available from `GNU mirror sites`_. |
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191 |
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192 Roundup does not use GNU gettext at runtime, but it's tools |
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193 are used for `extracting translatable messages`_, `compiling |
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194 message catalogs`_ and, optionally, for `translating messages`_. |
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195 |
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196 Note that ``gettext`` package in some OS distributions means just |
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197 runtime tools and libraries. In such cases gettext development tools |
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198 are usually distributed in separate package named ``gettext-devel``. |
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199 |
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200 Marking Strings for Translation |
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201 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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202 |
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203 Strings that need translation must be marked in the source code. |
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204 Following subsections explain how this is done in different cases. |
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205 |
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206 If translatable string is used as a format string, it is recommended |
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207 to always use *named* format specifiers:: |
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208 |
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209 _('Index of %(classname)s') % locals() |
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210 |
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211 This helps translators to better understand the context of the |
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212 message and, with Python formatting, remove format specifier altogether |
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213 (which is sometimes useful, especially in singular cases of `Plural Forms`_). |
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214 |
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215 When there is more than one format specifier in the translatable |
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216 format string, named format specifiers **must** be used almost always, |
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217 because translation may require different order of items. |
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218 |
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219 It is better to *not* mark for translation strings that are not |
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220 locale-dependent, as this makes it more difficult to keep track |
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221 of translation completeness. For example, string ``</ol></body></html>`` |
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222 (in ``index()`` method of the request handler in ``roundup_server`` |
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223 script) has no human readable parts at all, and needs no translations. |
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224 Such strings are left untranslated in PO files, and are reported |
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225 as such by PO status checkers (e.g. ``msgfmt --statistics``). |
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226 |
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227 Command Line Interfaces |
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228 ~~~~~~~~~~~~~~~~~~~~~~~ |
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229 |
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230 Scripts and routines run from the command line use "static" language |
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231 defined by environment variables recognized by ``gettext`` module |
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232 from Python library (``LANGUAGE``, ``LC_ALL``, ``LC_MESSAGES``, and |
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233 ``LANG``). Primarilly, these are ``roundup-admin`` script and |
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234 ``admin.py`` module, but also help texts and startup error messages |
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235 in other scripts and their supporting modules. |
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236 |
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237 For these interfaces, Python ``gettext`` engine must be initialized |
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238 to use Roundup message catalogs. This is normally done by including |
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239 the following line in the module imports:: |
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240 |
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241 from i18n import _, ngettext |
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242 |
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243 Simple translations are automatically marked by calls to builtin |
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244 message translation function ``_()``:: |
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245 |
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246 print(_("This message is translated")) |
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247 |
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248 Translations for messages whose grammatical depends on a number |
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249 must be done by ``ngettext()`` function:: |
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250 |
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251 print(ngettext("Nuked %i file", "Nuked %i files", number_of_files_nuked)) |
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252 |
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253 Deferred Translations |
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254 ~~~~~~~~~~~~~~~~~~~~~ |
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255 |
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256 Sometimes translatable strings appear in the source code in untranslated |
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257 form [#note_admin.py]_ and must be translated elsewhere. |
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258 Example:: |
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259 |
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260 for meal in ("spam", "egg", "beacon"): |
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261 print(_(meal)) |
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262 |
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263 In such cases, strings must be marked for translation without actual |
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264 call to the translating function. To mark these strings, we use Python |
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265 feature of automatic concatenation of adjacent strings and different |
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266 types of string quotes:: |
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267 |
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268 strings_to_translate = ( |
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269 ''"This string will be translated", |
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270 ""'me too', |
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271 ''r"\raw string", |
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272 ''""" |
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273 multiline string""" |
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274 ) |
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275 |
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276 .. [#note_admin.py] In current Roundup sources, this feature is |
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277 extensively used in the ``admin`` module using method docstrings |
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278 as help messages. |
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279 |
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280 Web User Interface |
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281 ~~~~~~~~~~~~~~~~~~ |
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282 |
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283 For Web User Interface, translation services are provided by Client |
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284 object. Action classes have methods ``_()`` and ``gettext()``, |
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285 delegating translation to the Client instance. In HTML templates, |
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286 translator object is available as context variable ``i18n``. |
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287 |
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288 HTML templates have special markup for translatable strings. |
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289 The syntax for this markup is defined on `ZPTInternationalizationSupport`_ |
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290 page. Roundup translation service currently ignores values for |
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291 ``i18n:domain``, ``i18n:source`` and ``i18n:target``. |
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292 |
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293 Template markup examples: |
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294 |
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295 * simplest case:: |
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296 |
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297 <div i18n:translate=""> |
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298 Say |
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299 no |
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300 more! |
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301 </div> |
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302 |
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303 this will result in msgid ``"Say no more!"``, with all leading and |
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304 trailing whitespace stripped, and inner blanks replaced with single |
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305 space character. |
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306 |
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307 * using variable slots:: |
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308 |
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309 <div i18n:translate=""> |
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310 And now...<br/> |
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311 No.<span tal:replace="number" i18n:name="slideNo" /><br/> |
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312 THE LARCH |
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313 </div> |
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314 |
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315 Msgid will be: ``"And now...<br /> No.${slideNo}<br /> THE LARCH"``. |
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316 Template rendering will use context variable ``number`` (you may use |
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317 any expression) to put instead of ``${slideNo}`` in translation. |
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318 |
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319 * attribute translation:: |
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320 |
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321 <button name="btn_wink" value=" Wink " i18n:attributes="value" /> |
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322 |
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323 will translate the caption (and return value) for the "wink" button. |
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324 |
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325 * explicit msgids. Sometimes it may be useful to specify msgid |
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326 for the element translation explicitely, like this:: |
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327 |
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328 <span i18n:translate="know what i mean?">this text is ignored</span> |
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329 |
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330 When rendered, element contents will be replaced by translation |
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331 of the string specified in ``i18n:translate`` attribute. |
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332 |
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333 * ``i18n`` in `TALES`_. You may translate strings in `TALES`_ python |
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334 expressions:: |
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335 |
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336 <span tal:replace="python: i18n.gettext('Oh, wicked.')" /> |
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337 |
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338 * plural forms. There is no markup for plural forms in `TAL`_ i18n. |
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339 You must use python expression for that:: |
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340 |
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341 <span tal:replace="python: i18n.ngettext( |
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342 'Oh but it\'s only %i shilling.', |
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343 'Oh but it\'s only %i shillings.', |
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344 fine) % fine" |
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345 /> |
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346 |
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347 Extracting Translatable Messages |
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348 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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349 |
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350 The most common tool for message extraction is ``xgettext`` utility |
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351 from `GNU gettext package`_. Unfortunately, this utility has no means |
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352 of `Deferred Translations`_ in Python sources. There is ``xpot`` tool |
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353 from Francois Pinard free `PO utilities`_ that allows to mark strings |
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354 for deferred translations, but it does not handle `plural forms`_. |
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355 |
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356 Roundup overcomes these limitations by using both of these utilities. |
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357 This means that you need both `GNU gettext`_ tools and `PO utilities`_ |
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358 to build the Message Template File yourself. |
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359 |
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360 Latest Message Template File is kept in the source code repository |
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361 and distributed with `Roundup Source`_. |
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362 If you wish to rebuild the template yourself, |
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363 make sure that you have both ``xpot`` and ``xgettext`` installed and |
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364 just run ``gmake`` (or ``make``, if you are on a `GNU`_ system like |
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365 `linux`_ or `cygwin`_) in the ``locale`` directory. |
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366 |
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367 For on-site i18n, Roundup provides command-line utility:: |
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368 |
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369 roundup-gettext <tracker_home> |
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370 |
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371 extracting translatable messages from tracker's html templates. |
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372 This utility creates message template file ``messages.pot`` in |
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373 ``locale`` subdirectory of the tracker home directory. Translated |
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374 messages may be put in *locale*.po files (where *locale* is selected |
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375 locale name) in the same directory, e.g.: ``locale/ru.po``. |
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376 These message catalogs are searched prior to system-wide translations |
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377 kept in the ``share`` directory. |
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378 |
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379 Translating Messages |
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380 ^^^^^^^^^^^^^^^^^^^^ |
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381 |
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382 Gettext Message File (`PO`_ file) is a plain text file, that can be created |
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383 by simple copying ``roundup.pot`` to new .po file, like this:: |
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384 |
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385 $ cp roundup.pot ru.po |
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386 |
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387 The name of PO file is target locale name, usually just 2-letter language |
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388 code (``ru`` for Russian in the above example). Alternatively, PO file |
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389 may be initialized by ``msginit`` utility from `GNU gettext`_ tools:: |
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390 |
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391 $ msginit -i roundup.pot |
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392 |
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393 ``msginit`` will check your current locale, and initialize the header |
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394 entry, setting language name, rules for `plural forms`_ and, if available, |
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395 translator's name and email address. The name for PO file is also chosen |
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396 based on current locale. |
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397 |
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398 Next, you will need to edit this file, filling all ``msgstr`` lines with |
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399 translations of the above ``msgid`` entries. PO file is a plain text |
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400 file that can be edited with any text editor. However, there are several |
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401 tools that may help you with this process: |
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402 |
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403 - `poEdit`_ by Vaclav Slavik. Very nice cross-platform GUI editor. |
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404 |
| 5367 | 405 - `Lokalize`_. A replacement for KBabel. Being part of `KDE`_, it |
| 406 works in X windows only. Haven't had much experience with it, though. | |
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407 |
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408 - ``po-mode`` for `emacs`_. One of `GNU gettext`_ tools. Very handy, |
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409 definitely recommended if you are comfortable with emacs. Cannot |
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410 handle `plural forms`_ per se, but allows to edit them in simple |
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411 text mode. |
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412 |
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413 - `po filetype plugin`_ for `vim`_. Does not do as much as ``po-mode``, |
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414 but helps in finding untranslated and fuzzy strings, and checking |
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415 code references. Please contact `alexander smishlajev`_ if you |
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416 prefer this, as i have patched this plugin a bit. I have also |
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417 informed the original plugin author about these changes, but got |
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418 no reply so far. |
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419 |
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420 Compiling Message Catalogs |
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421 ^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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422 |
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423 Message catalogs (`PO`_ files) must be compiled into binary form |
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424 (`MO`_ files) before they can be used in the application. This |
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425 compilation is handled by ``msgfmt`` utility from `GNU gettext`_ |
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426 tools. ``GNUmakefile`` in the ``locale`` directory automatically |
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427 compiles all existing message catalogs after updating them from |
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428 Roundup source files. If you wish to rebuild an individual `MO`_ |
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429 file without making everything else, you may, for example:: |
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430 |
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431 $ msgfmt --statistics -o ru.mo ru.po |
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432 |
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433 This way, message translators can check their `PO`_ files without |
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434 extracting strings from source. (Note: String extraction requires |
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435 additional utility that is not part of `GNU gettext`_. See `Extracting |
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436 Translatable Messages`_.) |
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437 |
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438 At run time, Roundup automatically compiles message catalogs whenever |
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439 `PO`_ file is changed. |
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440 |
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441 .. _`Customising Roundup`: customizing.html |
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442 .. _`Roundup's Design Document`: spec.html |
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443 .. _`implementation notes`: implementation.html |
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446 .. _External hyperlink targets: |
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447 |
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448 .. _alexander smishlajev: |
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449 .. _als: https://sourceforge.net/u/a1s/profile/ |
| 5367 | 450 .. _cygwin: https://www.cygwin.com/ |
| 451 .. _emacs: https://www.gnu.org/software/emacs/ | |
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452 .. _gettext package: http://www.gnu.org/savannah-checkouts/gnu/gettext/manual/gettext.html |
| 5367 | 453 .. _gettext module: https://docs.python.org/2/library/gettext.html |
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454 .. _GNU: http://www.gnu.org/ |
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455 .. _GNU mirror sites: http://www.gnu.org/prep/ftp.html |
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456 .. _issue tracker: https://issues.roundup-tracker.org/ |
| 5367 | 457 .. _Lokalize: Lokalize |
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458 .. _KDE: https://kde.org/ |
| 5367 | 459 .. _linux: https://www.linux.org/ |
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460 .. _Plural Forms: |
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461 http://www.gnu.org/savannah-checkouts/gnu/gettext/manual/gettext.html |
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462 .. _po filetype plugin: |
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463 https://vim.sourceforge.io/scripts/script.php?script_id=695 |
| 5367 | 464 .. _PO utilities: https://github.com/pinard/po-utils |
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465 .. _poEdit: https://poedit.net/ |
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466 .. _Roundup Source: |
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467 .. _Roundup source distribution: |
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468 .. _Roundup binary distribution: |
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469 https://sourceforge.net/projects/roundup/files/ |
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470 .. _roundup-devel mailing list: |
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471 https://sourceforge.net/projects/roundup/lists/roundup-devel |
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472 .. _TAL: |
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473 .. _Template Attribute Language: |
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474 https://pagetemplates.readthedocs.io/en/latest/history/TALSpecification14.html |
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475 .. _TALES: |
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476 .. _Template Attribute Language Expression Syntax: |
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477 https://pagetemplates.readthedocs.io/en/latest/history/TALESSpecification13.html |
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478 .. _vim: https://www.vim.org/ |
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479 .. _ZPTInternationalizationSupport: http://dev.zope.org/Wikis/DevSite/Projects/ComponentArchitecture/ZPTInternationalizationSupport |
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