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author | James Carey <jecarey@us.ibm.com> | 2015-02-24 22:23:36 +0000 |
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committer | James Carey <jecarey@us.ibm.com> | 2015-02-24 22:23:36 +0000 |
commit | b91fcb32f18389e9819609bd889aa85c1730ed76 (patch) | |
tree | 48eb883be1a0a96997faa53005193d65a1b581e0 /doc | |
parent | b0faab7b3d3ea3b14053ab92dd6086956f643e15 (diff) | |
download | oslo-i18n-b91fcb32f18389e9819609bd889aa85c1730ed76.tar.gz |
Update guideline doc of multiple use msg case
There was confusion in a cinder review with respect
to the case where a message is used both in a log
and in an exception:
https://review.openstack.org/#/c/155894/2
This update is to clarify the guidelines to help
prevent similar confusion in the future.
Change-Id: Ia26b4d3efafb8ad13c45e982a1be7aea176417e1
Diffstat (limited to 'doc')
-rw-r--r-- | doc/source/guidelines.rst | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/doc/source/guidelines.rst b/doc/source/guidelines.rst index 2377d64..a4a56c0 100644 --- a/doc/source/guidelines.rst +++ b/doc/source/guidelines.rst @@ -34,6 +34,27 @@ source code and pass it to the translation tool. * LOG.exception creates an ERROR level log, so when a marker function is used (see below) ``_LE()`` should be used. + +Using a Marker Function +======================= +The marker functions are used to mark the translatable strings in the +code. The strings are extracted into catalogs using a tool that +looks for these specific markers, so the function argument must just +be a string. + +For example: **do not do this**:: + + # WRONG + msg = _(variable_containing_msg) + w_msg = _LW(variable_warning_msg) + +Instead, use this style:: + + # RIGHT + msg = _('My message.') + w_msg = _LW('My warning message') + + Choosing a Marker Function ========================== @@ -64,10 +85,7 @@ than once, for the log call and the exception. In that case, ``_()`` must be used because the message is going to appear in an exception that may be presented to the user. -Examples --------- - -**Do not do this**:: +For example, **do not do this**:: # WRONG msg = _LE('There was an error.') @@ -84,7 +102,12 @@ Instead, use this style:: Except in the case above, ``_()`` should not be used for translating log messages. This avoids having the same string in two message catalogs, possibly translated differently by two different -translators. +translators. The log message will translate properly because when +the message is not found in the log specific catalog the ``_()`` +catalog will be used. + +If a common message is not being used, they should each be treated +separately with respect to choosing a marker function. For example, **do not do this**:: |