-*- text -*- If you are contributing code or translations to the Subversion project, please read this first. =============================== Guide to translating Subversion =============================== $LastChangedDate$ * Introduction * Software version requirements * Starting a new translation * Verifying your po file * Updating existing po files * Maintenance on branches * Requirements for po and mo files * Conventions for the empty string msgid section * Translation teams * Single versus double quotes * Error message conventions Introduction ============ Subversion uses gettext for its translation. Gettext uses '.po' files to store translation information; the existing ones are kept in the subversion/po directory of the repository. [Note that the last paragraph deliberately does not say GNU gettext.] Please take some time to go through this document as well as www/hacking.html. Software version requirements ============================= The Makefile build targets locale-gnu-* (used to maintain po files) require GNU gettext 0.13 or newer. Note that this is not a requirement for those wanting to compile the *.po files into *.mo's. Starting a new translation ========================== Before starting a new translation please contact the subversion development mailing list to make sure you are not duplicating efforts. Also please note that the project has a strong preference for translations which are maintained by more than one person: mailing the lists with your intentions might help you find supporters. After that, you should perform the following steps: * Unix (GNU gettext) 1) check out Subversion (see INSTALL for more information) 2) run ./autogen.sh 3) run ./configure 4) run make locale-gnu-pot This step is currently only supported for GNU gettext Makefile based systems 5) run msginit --locale LOCALE -o LOCALE.po in the subversion/po directory of your working copy. LOCALE is the ll[_LL] language and country code used to identify your locale. Steps (2) and (3) generate a Makefile; step (4) generates subversion/po/subversion.pot The Subversion project has a policy not to put names in its files, so please apply the two changes described below. (See www/hacking.html for a description of this convention.) The header in the newly generated .po file looks like this: # SOME DESCRIPTIVE TITLE. # Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER # This file is distributed under the same license as the PACKAGE package. # FIRST AUTHOR , YEAR. Please replace that block with the following text: # translation for subversion package # Copyright (C) CollabNet. # This file is distributed under the same license as the subversion package. The first translation block in the .po file contains two lines like these: "Last-Translator: FULL NAME \n" "Language-Team: LANGUAGE \n" Please replace those with these two lines: "Last-Translator: Subversion Developers \n" "Language-Team: YOUR LANGUAGE \n" * Unix (non-GNU gettext) To be documented * Windows See issue #1977 in the subversion issue tracker For the time being, hourly updated subversion.pot files are posted at: http://hix.nu/subversion/trunk/subversion.pot (for trunk) http://hix.nu/subversion/1.1.x/subversion.pot (for 1.1.x) Verifying your po file ====================== Before submitting to the mailing list or committing to the repository, please make sure your po file 'compiles'. You can do this with these steps (on Makefile based systems): 1) run './autogen.sh' 2) run './configure' (with the appropriate arguments) 3) run 'make locale' The autogen.sh step is important, since it adds new po files as dependencies of the 'locale' build target. Note however that steps 1 and 2 are only needed once after you have added a new translation. Updating existing po files ========================== The Makefile based part of the build system contains a make target to facilitate maintenance of existing po files. To update po files on systems with GNU gettext run make locale-gnu-po-update To only update a particular language, you may use make locale-gnu-po-update PO=ll where ll is the name of the po file without the extension (i.e. PO=sv). It is recommended that the .po update is done by using two commits; one after the "make locale-gnu-po-update", and one after the translation is done. This has two advantages: - gettext(1) produces lots of line number changes which makes the resulting diff hard to review by the other translators. By committing twice, all the line number changes are stored in the first commit, and the second commit contains all the actual translations with no extra garbage. - If there are several translators for a specific language (which is highly preferred by the project) you don't risk working for hours just to find that some other translator already has done the job when you're finished. You will immediately notice that someone else is working on the .po file when you try to perform the first commit, because svn will tell you that the file is outdated. Maintenance on branches ======================= Editing po files in trunk is pretty straightforward, but gets a bit more complicated when those changes are going to be transferred to a release branch. Project policy is to make no direct changes on release branches, everything that is committed to the branch should be merged from trunk. This also applies to po files. Using 'svn merge' to do the job can lead to conflicts and fuzzy messages due to the changes in line numbers and string formatting done by gettext. The scheme below eliminates any complexity which exists when using 'svn merge' to do branch updates. The following rules apply: - Translation updates go to trunk - Messages required on the branch which ever existed on trunk get merged from trunk - There are 2 mass operations allowed on po files on branches: * 'make locale-gnu-po-update' * merging messages from trunk (see below) - The remaining few messages which never existed on trunk in any revision are translated on the branch - Message options (such as fuzzy) can be tweaked The above list is a complete enumeration of all operations allowed on po files on branches. Merging messages from trunk revision X of YY.po to your branch working copy can be done with this command: svn cat -r X http://svn.collab.net/repos/svn/trunk/subversion/po/YY.po | \ po-merge.py YY.po Requirements for po and mo files ================================ On some gettext implementations we have to ensure that the mo files - whether obtained through the project or created locally - are encoded using UTF-8. This requirement stem from the fact that Subversion uses UTF-8 internally, some implementations translate to the active locale and the fact that bind_textdomain_codeset() is not portable across implementations. To satisfy this requirement po files are required to be UTF-8 encoded. If the gettext implementation on the target system doesn't support bind_textdomain_codeset(), the build system will ensure that the mo file is in UTF-8 by removing the Content-Type header from the po file header. Note that some msgfmt utilities dislike the absence of the charset designator and will generate warnings along the lines of "Won't be able to do character set conversion" because of it. You can safely ignore these warnings. Conventions for the empty string msgid section ============================================== Some gettext implementations use a section with a msgid "" (empty string) to keep administrative data. One of the headers suggested is the 'Last-Translator:' field. Because the Subversion project has a policy not to name contributors in specific files, but give credit in the repository log messages, you are required not to put your name in this field. Since some tools require this field to consider the po file valid (i.e. Emacs PO Mode), you can put "dev@subversion.tigris.org" into this field. Translation teams ================= The GNU translation project (http://www2.iro.umontreal.ca/~gnutra/po/HTML/) attempts to organise translation attempts and get translators for various packages. Some teams have guidelines to stimulate consistency across packages. Single versus double quotes =========================== The project has standardised the use of quotes. Some translation teams have done the same. If there is no translation team for your locale or they did not standardise quoting, please follow the project guidelines per www/hacking.html. If they did: follow them :-) Error message conventions ========================= Since translators will generally see all error messages in the code, it's important to know that there is a special section in www/hacking.html about this category of strings. Here the same applies as does for the quotes: Adhere to them on all points for which there is no explicit policy set out by the translation team for your language. vim: set tw=72 ts=2 sw=2 sts=2 et fo-=2w fo+=n js :