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Localization.md

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Localization

All new .NET for Android MSBuild error or warning messages should be localizable, so when adding a new message, follow these steps:

  1. Add the new message to src/Xamarin.Android.Build.Tasks/Properties/Resources.resx. Use the error or warning code as the resource name. For example, for XA0000, use XA0000 as the name:

    Managed Resources Editor with XA0000 as the name for a resource

  2. If using Visual Studio or Visual Studio for Mac, skip to the next step.

    If using an editor that does not automatically run design-time builds for MSBuild targets specified via %(Generator) MSBuild item metadata, explicitly build the project to update the generated properties.

  3. Use the generated C# property for the resource in the LogCodedError() and LogCodedWarning() calls:

    Log.LogCodedError ("XA0000", Properties.Resources.XA0000);

    Or, to log a message directly from an MSBuild target, pass the name of the resource to the ResourceName parameter of the <AndroidError/> or <AndroidWarning/> task instead:

    <AndroidError Code="XA0000" ResourceName="XA0000" />

  4. After adding the new message, build Xamarin.Android.Build.Tasks.csproj locally.

  5. Include the changes to the.resx file in the commit.

  6. The OneLocBuild task will manage handoff and handback for string translations.

Templates

All updates to src/Microsoft.Android.Templates should be built locally to update the templatestrings.*.json used for localization. The OneLocBuild task will manage handoff and handback for string translations after the templatestrings.*.json changes are committed.

Guidelines

  • When an error or warning code is used with more than one output string, use semantically meaningful suffixes to distinguish the resource names. As a made-up example:

    <data name="XA0000_Files" xml:space="preserve">
  <value>Invalid files.</value>
</data>
<data name="XA0000_Directories" xml:space="preserve">
  <value>Invalid directories.</value>
</data>

  • To include values of variables in the message, use numbered format items like {0} and {1} rather than string interpolation or string concatenation.

    The .resx infrastructure does not interoperate with C# 6 string interpolation.

    String concatenation should also be avoided because it means splitting up the message across multiple string resources, which makes it more complicated to provide appropriate context to the translators.

  • Use the comments field in the .resx file to provide additional context to the translators. For example, if a format item like {0} needs additional explanation, add a comment:

    {0} - The managed type name

    For a few more examples, see the dotnet/sdk repo:

    https://github.com/dotnet/sdk/blob/master/src/Tasks/Common/Resources/Strings.resx