X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/fe580240d40b17db3488c22057fdda62ae8a6f85..c430c5ebd08e92f38975faa3ac99b0c68015099b:/doc/plugins/po.mdwn diff --git a/doc/plugins/po.mdwn b/doc/plugins/po.mdwn index a2e7b18e3..0c8110563 100644 --- a/doc/plugins/po.mdwn +++ b/doc/plugins/po.mdwn @@ -5,6 +5,10 @@ This plugin adds support for multi-lingual wikis, translated with gettext, using [po4a](http://po4a.alioth.debian.org/). It depends on the Perl `Locale::Po4a::Po` library (`apt-get install po4a`). +As detailed bellow in the security section, `po4a` is subject to +denial-of-service attacks before version 0.35. + +[[!toc levels=2]] Introduction ============ @@ -29,6 +33,12 @@ Example: `bla/page.fr.po` is the PO "message catalog" used to translate `bla/page.mdwn` into French; if `usedirs` is enabled, it is rendered as `bla/page/index.fr.html`, else as `bla/page.fr.html` +(In)Compatibility +================= + +This plugin does not support the `indexpages` mode. If you don't know +what it is, you probably don't care. + Configuration ============= @@ -45,7 +55,7 @@ Supported languages languages, such as: po_slave_languages => { 'fr' => 'Français', - 'es' => 'Castellano', + 'es' => 'Español', 'de' => 'Deutsch', } @@ -62,39 +72,40 @@ worry about excluding them explicitly from this [[ikiwiki/PageSpec]]. Internal links -------------- +### Links targets + The `po_link_to` option in `ikiwiki.setup` is used to decide how internal links should be generated, depending on web server features and site-specific preferences. -### Default linking behavior +#### Default linking behavior If `po_link_to` is unset, or set to `default`, ikiwiki's default linking behavior is preserved: `\[[destpage]]` links to the master language's page. -### Link to current language +#### Link to current language If `po_link_to` is set to `current`, `\[[destpage]]` links to the `destpage`'s version written in the current page's language, if available, *i.e.*: -- `foo/destpage/index.LL.html` if `usedirs` is enabled -- `foo/destpage.LL.html` if `usedirs` is disabled +* `foo/destpage/index.LL.html` if `usedirs` is enabled +* `foo/destpage.LL.html` if `usedirs` is disabled -### Link to negotiated language +#### Link to negotiated language If `po_link_to` is set to `negotiated`, `\[[page]]` links to the negotiated preferred language, *i.e.* `foo/page/`. (In)compatibility notes: -- if `usedirs` is disabled, it does not make sense to set `po_link_to` +* if `usedirs` is disabled, it does not make sense to set `po_link_to` to `negotiated`; this option combination is neither implemented nor allowed. -- if the web server does not support Content Negotiation, setting +* if the web server does not support Content Negotiation, setting `po_link_to` to `negotiated` will produce a unusable website. - Server support ============== @@ -127,6 +138,10 @@ Usage Templates --------- +When `po_link_to` is not set to `negotiated`, one should replace some +occurrences of `BASEURL` with `HOMEPAGEURL` to get correct links to +the wiki homepage. + The `ISTRANSLATION` and `ISTRANSLATABLE` variables can be used to display things only on translatable or translation pages. @@ -135,43 +150,21 @@ display things only on translatable or translation pages. The `OTHERLANGUAGES` loop provides ways to display other languages' versions of the same page, and the translations' status. -One typically adds the following code to `templates/page.tmpl`: - - -
- -
- - -The following variables are available inside the loop (for every page in): - -- `URL` - url to the page -- `CODE` - two-letters language code -- `LANGUAGE` - language name (as defined in `po_slave_languages`) -- `MASTER` - is true (1) if, and only if the page is a "master" page -- `PERCENT` - for "slave" pages, is set to the translation completeness, in percents +An example of its use can be found in the default +`templates/page.tmpl`. In case you want to customize it, the following +variables are available inside the loop (for every page in): + +* `URL` - url to the page +* `CODE` - two-letters language code +* `LANGUAGE` - language name (as defined in `po_slave_languages`) +* `MASTER` - is true (1) if, and only if the page is a "master" page +* `PERCENT` - for "slave" pages, is set to the translation completeness, in percents ### Display the current translation status The `PERCENTTRANSLATED` variable is set to the translation -completeness, expressed in percent, on "slave" pages. - -One can use it this way: - - -
- -
- +completeness, expressed in percent, on "slave" pages. It is used by +the default `templates/page.tmpl`. Additional PageSpec tests ------------------------- @@ -184,133 +177,120 @@ Automatic PO file update Committing changes to a "master" page: -1. updates the POT file and the PO files for the supported languages; - the updated PO files are then put under version control -2. triggers a refresh of the corresponding HTML slave pages +1. updates the POT file and the PO files for the "slave" languages; + the updated PO files are then put under version control; +2. triggers a refresh of the corresponding HTML slave pages. Also, when the plugin has just been enabled, or when a page has just been declared as being translatable, the needed POT and PO files are created, and the PO files are checked into version control. -Discussion pages ----------------- +Discussion pages and other sub-pages +------------------------------------ + +Discussion should happen in the language in which the pages are +written for real, *i.e.* the "master" one. If discussion pages are +enabled, "slave" pages therefore link to the "master" page's +discussion page. -Discussion should happen in the language in which the pages are written for -real, *i.e.* the "master" one. If discussion pages are enabled, "slave" pages -therefore link to the "master" page's discussion page. +Likewise, "slave" pages are not supposed to have sub-pages; +[[WikiLinks|wikilink]] that appear on a "slave" page therefore link to +the master page's sub-pages. Translating ----------- -One can edit the PO files using ikiwiki's CGI (a message-by-message interface -could also be implemented at some point). +One can edit the PO files using ikiwiki's CGI (a message-by-message +interface could also be implemented at some point). If [[tips/untrusted_git_push]] is setup, one can edit the PO files in one's preferred `$EDITOR`, without needing to be online. -TODO -==== - -OTHERLANGUAGES dependencies ---------------------------- - -Pages using `OTHERLANGUAGES` depend on any "master" and "slave" pages -whose status is being displayed. It is supposed to trigger dependency -loops, but no practical bugs were noticed yet. - -Should pages using the `OTHERLANGUAGES` template loop be declared as -linking to the same page in other versions? To be rigorous, they -should, but this may clutter the backlinks. - -Security checks ---------------- - -- `refreshpofiles` uses `system()`, whose args have to be checked more - thoroughly to prevent any security issue (command injection, etc.). - > Always pass `system()` a list of parameters to avoid the shell. - > I've checked in a change fixing that. --[[Joey]] -- `refreshpofiles` and `refreshpot` create new files; this may need - some checks, e.g. using `IkiWiki::prep_writefile()` - > Yes, it would be ideal to call `prep_writefile` on each file - > that they write, beforehand. This way you'd avoid symlink attacks etc to the - > generated po/pot files. I haven't done it, but it seems pretty trivial. - > --[[Joey]] -- Can any sort of directives be put in po files that will - cause mischief (ie, include other files, run commands, crash gettext, - whatever). -- Any security issues on running po4a on untrusted content? - -gettext/po4a rough corners --------------------------- - -- fix infinite loop when synchronizing two ikiwiki (when checkouts - live in different directories): say bla.fr.po has been updated in - repo2; pulling repo2 from repo1 seems to trigger a PO update, that - changes bla.fr.po in repo1; then pushing repo1 to repo2 triggers - a PO update, that changes bla.fr.po in repo2; etc.; fixed in - `629968fc89bced6727981c0a1138072631751fee`? -- new translations created in the web interface must get proper charset/encoding - gettext metadata, else the next automatic PO update removes any non-ascii - chars; possible solution: put such metadata into the Pot file, and let it - propagate; should be fixed in `773de05a7a1ee68d2bed173367cf5e716884945a`, time - will tell. - -Misc. improvements ------------------- - -### preview - -preview does not work for PO files. - -### automatic POT/PO update - -Use the `change` hook instead of `needsbuild`? - -### page titles - -Use nice page titles from meta plugin in links, as inline already does. This is -actually a duplicate for -[[bugs/pagetitle_function_does_not_respect_meta_titles]], which might be fixed -by something like [[todo/using_meta_titles_for_parentlinks]]. - -### websetup - -Which configuration settings are safe enough for websetup? - -> I see no problems with `po_master_language` and `po_slave_languages` -> (assuming websetup handles the hashes correctly). Would not hurt to check -> that the values of these are legal language codes, in `checkconfig`. -> `po_translatable_pages` seems entirely safe. `po_link_to` w/o usedirs -> causes ikiwiki to error out. If it were changed to fall back to a safe -> setting in this case rather than error, it would be safe. -> --[[Joey]] - -### parentlinks - -When the wiki home page is translatable, the parentlinks plugin sets -`./index.html` as its translations' single parent link. Ideally, the home page's -translations should get no parent link at all, just like the version written in -the master language. +Markup languages support +------------------------ -### backlinks +[[Markdown|mdwn]] is well supported. Some other markup languages supported +by ikiwiki mostly work, but some pieces of syntax are not rendered +correctly on the slave pages: -If a given translatable `sourcepage.mdwn` links to \[[destpage]], -`sourcepage.LL.po` also link to \[[destpage]], and the latter has the master -page *and* all its translations listed in the backlinks. +* [[reStructuredText|rst]]: anonymous hyperlinks and internal + cross-references +* [[wikitext]]: conversion of newlines to paragraphs +* [[creole]]: verbatim text is wrapped, tables are broken +* [[html]] and LaTeX: not supported yet; the dedicated po4a modules + could be used to support them, but they would need a security audit +* other markup languages have not been tested. -### license +Security +======== -> Could you please put a copyright and license on po.pm? I assume it's -> GPLed as it's based on po4a-translate. --[[Joey]] +[[po/discussion]] contains a detailed security analysis of this plugin +and its dependencies. -Translation quality assurance ------------------------------ +When using po4a older than 0.35, it is recommended to uninstall +`Text::WrapI18N` (Debian package `libtext-wrapi18n-perl`), in order to +avoid a potential denial of service. -Modifying a PO file via the CGI must be forbidden if the new version -is not a valid PO file. As a bonus, check that it provides a more -complete translation than the existing one. +TODO +==== -A new `cansave` type of hook would be needed to implement this. +Better links +------------ + +Once the fix to +[[bugs/pagetitle_function_does_not_respect_meta_titles]] from +[[intrigeri]]'s `meta` branch is merged into ikiwiki upstream, the +generated links' text will be optionally based on the page titles set +with the [[meta|plugins/meta]] plugin, and will thus be translatable. +It will also allow displaying the translation status in links to slave +pages. Both were implemented, and reverted in commit +ea753782b222bf4ba2fb4683b6363afdd9055b64, which should be reverted +once [[intrigeri]]'s `meta` branch is merged. + +An integration branch, called `meta-po`, merges [[intrigeri]]'s `po` +and `meta` branches, and thus has thise additional features. + +Self links +---------- + +If a page contains a WikiLink to itself, ikiwiki does not normally +turn that into a hyperlink. However, if a translated page contains a +WikiLink to itself, a hyperlink is inserted, at least with the default +`po_link_to` the link points to the English version of the page. Is there a +good reason for that to be done? --[[Joey]] + +Language display order +---------------------- + +Jonas pointed out that one might want to control the order that links to +other languages are listed, for various reasons. Currently, there is no +order, as `po_slave_languages` is a hash. It would need to be converted +to an array to support this. (If twere done, twere best done quickly.) +--[[Joey]] + +Duplicate %links ? +------------------ -Note: committing to the underlying repository is a way to bypass -this check. +I notice code in the scan hook that seems to assume +that %links will accumulate duplicate links for a page. +That used to be so, but the bug was fixed. Does this mean +that po might be replacing the only link on a page, in error? +--[[Joey]] + +Bug when editing underlay file +------------------------------ + +While I've gotten translated underlays working, there is a bug +if the wiki is currently using a page from the underlay, and the master +language version is edited. This causes the edited page to be saved +to srcdir.. and all the translations get set to 0% and their +po files have the translated strings "emptied". What's really going on +is that these are entirely new po files not based on the old ones +in the basewiki, and thus lacking translations. --[[Joey]] + +Documentation +------------- + +Maybe write separate documentation depending on the people it targets: +translators, wiki administrators, hackers. This plugin may be complex +enough to deserve this.