##### Locale::Po4a modules
-- the modules we want to use have to be checked, as not all are safe
- (e.g. the LaTeX module's behaviour is changed by commands included
- in the content); they may use regexps generated from the content; we
- currently only use the `Text` module
-- the `Text` module does not run any external program
-- check that no module is loaded by `Chooser.pm`, when we tell it to
- load the `Text` one
-- `nsgmls` is used by `Sgml.pm`
+The modules we want to use have to be checked, as not all are safe
+(e.g. the LaTeX module's behaviour is changed by commands included in
+the content); they may use regexps generated from the content.
+
+`Chooser.pm` only loads the plugin we tell it too: currently, this
+means the `Text` module only.
+
+`Text` module (I checked the CVS version):
+
+- it does not run any external program
+- only `do_paragraph()` builds regexp's that expand untrusted
+ variables; they seem safe to me, but someone more expert than me
+ will need to check. Joey?
##### Text::WrapI18N
`Locale::Po4a::Common::wrapi18n` may be easier. I'm no expert at all
in this field. Joey? [[--intrigeri]]
+> Update: Nicolas François suggests we add an option to po4a to
+> disable it. It would do the trick, but only for people running
+> a brand new po4a (probably too late for Lenny). Anyway, this option
+> would have to take effect in a `BEGIN` / `eval` that I'm not
+> familiar with. I can learn and do it, in case no Perl wizard
+> volunteers to provide the po4a patch. [[--intrigeri]]
+
##### Term::ReadKey
`Term::ReadKey` is not a hard dependency in our case, *i.e.* po4a
`Locale::Po4a::Common`, just to be on the safe side. Joey?
[[--intrigeri]]
+> Update: adding an option to disable `Text::WrapI18N`, as Nicolas
+> François suggested, would as a bonus disable `Term::ReadKey`
+> as well. [[--intrigeri]]
+
### msgmerge
`refreshpofiles()` runs this external program. A po4a developer
> po4a was not fuzzy-tested, but according to one of its developers,
> "it would be really appreciated". [[--intrigeri]]
+Test conditions:
+
+- a 21M file containing 100 concatenated copies of all the files in my
+ `/usr/share/common-licenses/`; I had no existing PO file or
+ translated versions at hand, which renders these tests
+ quite incomplete.
+- po4a was the Debian 0.34-2 package; the same tests were also run
+ after replacing the `Text` module with the CVS one (the core was not
+ changed in CVS since 0.34-2 was released), without any significant
+ difference in the results.
+- Perl 5.10.0-16
+
+#### po4a-gettextize
+
+`po4a-gettextize` uses more or less the same po4a features as our
+`refreshpot` function.
+
+Without specifying an input charset, zzuf'ed `po4a-gettextize` quickly
+errors out, complaining it was not able to detect the input charset;
+it leaves no incomplete file on disk.
+
+So I had to pretend the input was in UTF-8, as does the po plugin.
+
+Two ways of crashing were revealed by this command-line:
+
+ zzuf -vc -s 0:100 -r 0.1:0.5 \
+ po4a-gettextize -f text -o markdown -M utf-8 -L utf-8 \
+ -m LICENSES >/dev/null
+
+They are:
+
+ Malformed UTF-8 character (UTF-16 surrogate 0xdcc9) in substitution iterator at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
+ Malformed UTF-8 character (fatal) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
+
+and
+
+ Malformed UTF-8 character (UTF-16 surrogate 0xdcec) in substitution (s///) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
+ Malformed UTF-8 character (fatal) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
+
+Perl seems to exit cleanly, and an incomplete PO file is written on
+disk. I not sure whether if this is a bug in Perl or in `Po.pm`.
+
+#### po4a-translate
+
+`po4a-translate` uses more or less the same po4a features as our
+`filter` function.
+
+Without specifying an input charset, same behaviour as
+`po4a-gettextize`, so let's specify UTF-8 as input charset as of now.
+
+ zzuf -cv \
+ po4a-translate -d -f text -o markdown -M utf-8 -L utf-8 \
+ -k 0 -m LICENSES -p LICENSES.fr.po -l test.fr
+
+... prints tons of occurences of the following error, but a complete
+translated document is written (obviously with some weird chars
+inside):
+
+ Use of uninitialized value in string ne at /usr/share/perl5/Locale/Po4a/TransTractor.pm line 854.
+ Use of uninitialized value in string ne at /usr/share/perl5/Locale/Po4a/TransTractor.pm line 840.
+ Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Locale/Po4a/Po.pm line 1002.
+
+While:
+
+ zzuf -cv -s 0:10 -r 0.001:0.3 \
+ po4a-translate -d -f text -o markdown -M utf-8 -L utf-8 \
+ -k 0 -m LICENSES -p LICENSES.fr.po -l test.fr
+
+... seems to lose the fight, at the `readpo(LICENSES.fr.po)` step,
+against some kind of infinite loop, deadlock, or any similar beast.
+It does not seem to eat memory, though.
+
+Whatever format module is used does not change anything. This is thus
+probably a bug in po4a's core or in a lib it depends on.
+
+The sub `read`, in `TransTractor.pm`, seems to be a good debugging
+starting point.
+
+#### msgmerge
+
+`msgmerge` is run in our `refreshpofiles` function. I did not manage
+to crash it with `zzuf`.
+
gettext/po4a rough corners
--------------------------
sipb-www / ikiwiki.git / blobdiff