Twine
Twine is a command line tool for managing your strings and their translations. These are all stored in a master text file and then Twine uses this file to import and export localization files in a variety of types, including iOS and Mac OS X .strings
files, Android .xml
files, gettext .po
files, and jquery-localize .json
files. This allows individuals and companies to easily share translations across multiple projects, as well as export localization files in any format the user wants.
Install
Twine is most easily installed as a Gem.
$ gem install twine
Twine File Format
Twine stores everything in a single file, the Twine data file. The format of this file is a slight variant of the Git config file format, which itself is based on the old Windows INI file format. The entire file is broken up into sections, which are created by placing the section name between two pairs of square brackets. Sections are optional, but they are the recommended way of grouping your definitions into smaller, more manageable chunks.
Each grouping section contains N definitions. These definitions start with the key placed within a single pair of square brackets. It then contains a number of key-value pairs, including a comment, a comma-separated list of tags and all of the translations.
Placeholders
Twine supports printf
style placeholders with one peculiarity: @
is used for strings instead of s
. This is because Twine started out as a tool for iOS and OS X projects.
Tags
Tags are used by Twine as a way to only work with a subset of your definitions at any given point in time. Each definition can be assigned zero or more tags which are separated by commas. Tags are optional, though highly recommended. You can get a list of all definitions currently missing tags by executing the validate-twine-file
command with the --pedantic
option.
When generating a localization file, you can specify which definitions should be included using the --tags
option. Provide a comma separated list of tags to match all definitions that contain any of the tags (--tags tag1,tag2
matches all definitions tagged with tag1
or tag2
). Provide multiple --tags
options to match defintions containing all specified tags (--tags tag1 --tags tag2
matches all definitions tagged with tag1
and tag2
). You can match definitions not containing a tag by prefixing the tag with a tilde (--tags ~tag1
matches all definitions not tagged with tag1
). All three options are combinable.
Whitespace
Whitepace in this file is mostly ignored. If you absolutely need to put spaces at the beginning or end of your translated string, you can wrap the entire string in a pair of `
characters. If your actual string needs to start and end with a grave accent, you can wrap it in another pair of `
characters. See the example, below.
References
If you want a definition to inherit the values of another definition, you can use a reference. Any property not specified for a definition will be taken from the reference.
Example
[[General]]
[yes]
en = Yes
es = Sí
fr = Oui
ja = はい
[no]
en = No
fr = Non
ja = いいえ
[[Errors]]
[path_not_found_error]
en = The file '%@' could not be found.
tags = app1,app6
comment = An error describing when a path on the filesystem could not be found.
[network_unavailable_error]
en = The network is currently unavailable.
tags = app1
comment = An error describing when the device can not connect to the internet.
[dismiss_error]
ref = yes
en = Dismiss
[[Escaping Example]]
[list_item_separator]
en = `, `
tags = mytag
comment = A string that should be placed between multiple items in a list. For example: Red, Green, Blue
[grave_accent_quoted_string]
en = ``%@``
tags = myothertag
comment = This string will evaluate to `%@`.
Supported Output Formats
Twine currently supports the following output formats:
- iOS and OS X String Resources (format: apple)
- Android String Resources (format: android)
- Gettext PO Files (format: gettext)
- jquery-localize Language Files (format: jquery)
- Django PO Files (format: django)
- Tizen String Resources (format: tizen)
- Flash/Flex Properties (format: flash)
If you would like to enable Twine to create localization files in another format, read the wiki page on how to create an appropriate formatter.
Usage
Usage: twine COMMAND TWINE_FILE [INPUT_OR_OUTPUT_PATH] [--lang LANG1,LANG2...] [--tags TAG1,TAG2,TAG3...] [--format FORMAT]
Commands
generate-localization-file
This command creates a localization file from the Twine data file. If the output file would not contain any translations, Twine will exit with an error.
$ twine generate-localization-file /path/to/twine.txt values-ja.xml --tags common,app1
$ twine generate-localization-file /path/to/twine.txt Localizable.strings --lang ja --tags mytag
$ twine generate-localization-file /path/to/twine.txt all-english.strings --lang en
generate-all-localization-files
This command is a convenient way to call generate-localization-file
multiple times. It uses standard conventions to figure out exactly which files to create given a parent directory. For example, if you point it to a parent directory containing en.lproj
, fr.lproj
, and ja.lproj
subdirectories, Twine will create a Localizable.strings
file of the appropriate language in each of them. However, files that would not contain any translations will not be created; instead warnings will be logged to stderr
. This is often the command you will want to execute during the build phase of your project.
$ twine generate-all-localization-files /path/to/twine.txt /path/to/project/locales/directory --tags common,app1
consume-localization-file
This command slurps all of the translations from a localization file and incorporates the translated strings into the Twine data file. This is a simple way to incorporate any changes made to a single file by one of your translators. It will only identify definitions that already exist in the data file.
$ twine consume-localization-file /path/to/twine.txt fr.strings
$ twine consume-localization-file /path/to/twine.txt Localizable.strings --lang ja
$ twine consume-localization-file /path/to/twine.txt es.xml
consume-all-localization-files
This command reads in a folder containing many localization files. These files should be in a standard folder hierarchy so that Twine knows the language of each file. When combined with the --developer-language
, --consume-comments
, and --consume-all
flags, this command is a great way to create your initial Twine data file from an existing project. Just make sure that you create a blank Twine data file first!
$ twine consume-all-localization-files twine.txt Resources/Locales --developer-language en --consume-all --consume-comments
generate-localization-archive
This command is a convenient way to generate a zip file containing files created by the generate-localization-file
command. If a file would not contain any translated strings, it is skipped and a warning is logged to stderr
. This command can be used to create a single zip containing a large number of translations in all languages which you can then hand off to your translation team.
$ twine generate-localization-archive /path/to/twine.txt LocDrop1.zip
$ twine generate-localization-archive /path/to/twine.txt LocDrop2.zip --lang en,fr,ja,ko --tags common,app1
consume-localization-archive
This command is a convenient way of taking a zip file and executing the consume-localization-file
command on each file within the archive. It is most often used to incorporate all of the changes made by the translation team after they have completed work on a localization archive.
$ twine consume-localization-archive /path/to/twine.txt LocDrop2.zip
validate-twine-file
This command validates that the Twine data file can be parsed, contains no duplicate keys, and that no key contains invalid characters. It will exit with a non-zero status code if any of those criteria are not met.
$ twine validate-twine-file /path/to/twine.txt
Creating Your First Twine Data File
The easiest way to create your first Twine data file is to run the consume-all-localization-files
command. The one caveat is to first create a blank file to use as your starting point. Then, just point the consume-all-localization-files
command at a directory in your project containing all of your localization files.
$ touch twine.txt
$ twine consume-all-localization-files twine.txt Resources/Locales --developer-language en --consume-all --consume-comments
Twine and Your Build Process
Xcode
It is easy to incorporate Twine right into your iOS and OS X app build processes.
-
In your project folder, create all of the
.lproj
directories that you need. It does not really matter where they are. We tend to put them inResources/Locales/
. -
Run the
generate-all-localization-files
command to create all of the.strings
files you need in these directories. For example,$ twine generate-all-localization-files twine.txt Resources/Locales/ --tags tag1,tag2
Make sure you point Twine at your data file, the directory that contains all of your
.lproj
directories, and the tags that describe the definitions you want to use for this project. -
Drag the
Resources/Locales/
directory to the Xcode project navigator so that Xcode knows to include all of these.strings
files in your build. -
In Xcode, navigate to the "Build Phases" tab of your target.
-
Click on the "Add Build Phase" button and select "Add Run Script".
-
Drag the new "Run Script" build phase up so that it runs earlier in the build process. It doesn't really matter where, as long as it happens before the resources are copied to your bundle.
-
Edit your script to run the exact same command you ran in step (2) above.
Now, whenever you build your application, Xcode will automatically invoke Twine to make sure that your .strings
files are up-to-date.
Android Studio/Gradle
Add the following task at the top level in app/build.gradle:
task generateLocalizations {
String script = 'if hash twine 2>/dev/null; then twine generate-localization-file twine.txt ./src/main/res/values/generated_strings.xml; fi'
exec {
executable "sh"
args '-c', script
}
}
Now every time you build your app the localization files are generated from the Twine file.
User Interface
- Twine TextMate 2 Bundle — This TextMate 2 bundle will make it easier for you to work with Twine files. In particular, it lets you use code folding to easily collapse and expand both definitions and sections.
Extending Twine
If there's a format Twine does not yet support and you're keen to change that, check out the documentation.
Contributors
Many thanks to all of the contributors to the Twine project, including: