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DigitalMediaServer / crowdin-maven-plugin

A Maven plugin for synchronizing translations with Crowdin

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crowdintranslationinternationalizationlocalizationmavenmaven-pluginjavajava-7

Crowdin Maven Plugin

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This Maven plugin synchronizes translation files between the local project and Crowdin using the Crowdin API v2. It was originally based on glandais' crowdin-maven plugin, but has since been completely rewritten. The Maven project must be in a Git repository to use branches, since Git branches are translated to Crowdin branches.

If you're migrating from a 1.x version of this plugin, you might want to skip directly to the migration guide.

Table of Contents

1. Configuration

This plugin needs configuration to know what files to handle and how. It is meant to be executed manually using Maven, but it would require too many command-line arguments to be practical if the configuration wasn't stored somewhere. The project's pom.xml is therefore used to store most of the configuration, while the Crowdin credentials is stored in Maven's settings, preferably in ~/.m2/settings.xml. This way the configuration is checked in to the Git repository while the credentials are kept in the local file system for those that are authorized to synchronize translations with Crowdin.

The pom.xml configuration for this plugin doesn't affect the Maven build process by default, as the only phase it binds to is the clean phase. It is possible to bind one or more goal from this plugin to specific build phases, but it's hard to see how that could be useful. Running the plugin without having configured the pom.xml and the credentials will result in an error.

1.1 Credentials

To access Crowdin your API token is needed. This is configured by specifying a server in Maven's configuration, which is then referenced in the plugin configuration with the crowdinServerId parameter. You can create an API token under Account settings -> API at Crowdin.

The API token needs to be kept private, so the best place to put it is usually in Maven's user settings. This can be achieved by adding a server to your ~/.m2/settings.xml as shown in the example below. If you don't have a ~/.m2/settings.xml file, a template that can be pasted into an empty file is provided.

1.1.1 Example credentials configuration

<settings>
<!-- ... -->
  <servers>
    <!-- ... -->
    <server>
      <id>crowdin</id>
      <password>API token</password>
    </server>
    <!-- ... -->
  </servers>
  <!-- ... -->
</settings>

1.1.2 Settings template

If you're missing the file ~/.m2/settings.xml, you can copy and paste the template below:

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <pluginGroups>
  </pluginGroups>
  <proxies>
  </proxies>
  <servers>
    <server>
      <id>crowdin</id>
      <password>Your API token</password>
    </server>
  </servers>
  <mirrors>
  </mirrors>
  <profiles>
  </profiles>
</settings>

1.2 Project configuration

The project configuration is stored in the pom.xml of the project. A detailed description is given below.

1.2.1 Skeleton project configuration

Here is a skeleton project configuration showing the location of all configuration options:

<project>
<!-- ... -->
  <build>
    <!-- ... -->
    <pluginManagement>
      <!-- ... -->
      <plugins>
        <!-- ... -->
        <plugin>
          <groupId>org.digitalmediaserver</groupId>
          <artifactId>crowdin-maven-plugin</artifactId>
          <version>...</version>
          <configuration>
            <projectId></projectId>
            <comment></comment>
            <confirm></confirm>
            <crowdinServerId></crowdinServerId>
            <httpTimeout></httpTimeout>
            <buildTimeout></buildTimeout>
            <downloadFolder></downloadFolder>
            <lineSeparator></lineSeparator>
            <projectName></projectName>
            <disableBranches></disableBranches>
            <gitBaseFolder></gitBaseFolder>
            <rootBranch></rootBranch>
            <skipUntranslatedStrings></skipUntranslatedStrings>
            <skipUntranslatedFiles></skipUntranslatedFiles>
            <exportApprovedOnly></exportApprovedOnly>
            <updateOption></updateOption>
            <replaceModifiedContext></replaceModifiedContext>
            <statusFiles>
              <statusFile>
                <addComment></addComment>
                <comment></comment>
                <encoding></encoding>
                <escapeUnicode></escapeUnicode>
                <lineSeparator></lineSeparator>
                <sortLines></sortLines>
                <targetFile></targetFile>
                <type></type>
                <conversions>
                  <conversion><from></from><to></to></conversion>
                  <!-- ... -->
                </conversions>
              </statusFile>
              <statusFile>
                <!-- ... -->
              </statusFile>
              <!-- ... -->
            </statusFiles>
            <translationFileSets>
              <translationFileSet>
                <addComment></addComment>
                <baseFileName></baseFileName>
                <comment></comment>
                <commentTag></commentTag>
                <crowdinPath></crowdinPath>
                <encoding></encoding>
                <escapeQuotes></escapeQuotes>
                <escapeSpecialCharacters></escapeSpecialCharacters>
                <exportQuotes></exportQuotes>
                <escapeUnicode></escapeUnicode>
                <exportPattern></exportPattern>
                <languageFilesFolder></languageFilesFolder>
                <lineSeparator></lineSeparator>
                <sortLines></sortLines>
                <targetFileName></targetFileName>
                <title></title>
                <type></type>
                <updateOption></updateOption>
                <replaceModifiedContext></replaceModifiedContext>
                <writeBOM></writeBOM>
                <conversions>
                  <conversion><from></from><to></to></conversion>
                  <!-- ... -->
                </conversions>
                <excludes>
                  <exclude></exclude>
                  <!-- ... -->
                </excludes>
                <includes>
                  <include></include>
                  <!-- ... -->
                </includes>
              </translationFileSet>
              <translationFileSet>
                <!-- ... -->
              </translationFileSet>
              <!-- ... -->
            </translationFileSets>
          </configuration>
        </plugin>
        <!-- ... -->
      </plugins>
      <!-- ... -->
    </pluginManagement>
    <!-- ... -->
  </build>
  <!-- ... -->
</project>

1.2.2 Parameter description

Name Type Req. Default Description
projectId Integer Yes The Crowdin project Id. It can be found at Crowdin under Tools -> API
comment String No * The global comment to add to the top of downloaded translation files. If defined, this parameter acts as the default for all translationFileSets and statusFiles.
confirm String push This is required to be true to use the push goal. This parameter can be overridden on the command line with -Dconfirm. Any strings that exist on Crowdin but don't exist in the uploaded files will have all their translations deleted on Crowdin when pushed. As such, it's important to make sure that a push is intended. Although this parameter can be set to true in pom.xml, it is recommended not to. That way, adding -Dconfirm to the command line is required to be able to push.
crowdinServerId String Yes The id of the Maven configured server to be used for Crowdin authentication.
httpTimeout Integer No Timeout in seconds for HTTP operations when communicating with the Crowdin API. The default is no timeout.
buildTimeout Integer No 60 Timeout in seconds for building translations at Crowdin.
downloadFolder String Yes The intermediate folder used to store the downloaded files.
lineSeparator String No The global alternative line separator to apply to the downloaded files, for example \n or \r\n. If defined, this parameter acts as the default for all translationFileSets and statusFiles.
projectName String push This is required to use the push goal. The value must match the project name defined in pom.xml. It is a safety check to make sure you don't push to the wrong project if the configuration has been copied from another project.
disableBranches Boolean No false Disables the use of Crowdin branches and all reliance on Git. Useful if the workflow doesn't involve Crowdin branches, or if the project doesn't reside in a Git repository.
gitBaseFolder String No By default the Git repository is assumed to be the same folder as ${project.basedir} as defined by Maven. Use this parameter to make Git look elsewhere for the repository. The value can be an absolute or a relative path. An absolute path is used as it is, while a relative path is resolved from ${project.basedir}.
rootBranch String No master The Git branch that should be considered the root on Crowdin (that is; not exist in a branch folder). This parameter can be overridden on the command line with -DrootBranch=. Any local Git branch not matching this parameter will push to and fetch from a branch folder at Crowdin.
statusFiles List No A list of one or more statusFile elements. A statusFile element represents a local status file. This is a file a file in either properties or xml format, whose content is the output of the status Crowdin API method. The file contains basic information about the state of the translations per language for all files in total. Crowdin doesn't allow getting the status per file, so having more than one status file for a project would serve little purpose. See separate definition.
translationFileSets List Yes A list of one or more translationFileSet elements. A translationsFileSet element represents a local base language file and its set of corresponding translations in other languages. It also represents a single file on Crowdin. Only the base language file will be uploaded to Crowdin, and only the corresponding translated language files will be downloaded. See separate definition.
skipUntranslatedStrings Boolean No true Note: This parameter cannot be true if skipUntranslatedFiles is true. Only translated strings will be included in the exported translation files. This option is not applied to text documents: *.docx, *.pptx, *.xlsx, etc., since missing texts may cause the resulting files to be unreadable. This parameter is not used by this plugin, it is merely passed on to Crowdin when triggering a new build.
skipUntranslatedFiles Boolean No false Note: This parameter cannot be true if skipUntranslatedStrings is true. Only translated files will be included in the exported translation files. This parameter is not used by this plugin, it is merely passed on to Crowdin when triggering a new build.
exportApprovedOnly Boolean No false Only texts that are both translated and approved will be included in the exported translation files. This will require additional efforts from your proofreaders to approve all suggestions. This parameter is not used by this plugin, it is merely passed on to Crowdin when triggering a new build.
updateOption Enum No Clear The global Update or Restore File Crowdin API parameter. See separate definition. This parameter is not used by this plugin, it is merely passed on to Crowdin when uploading source files. If defined, this parameter acts as the default for all translationFileSets.
replaceModifiedContext Boolean No false The global option of whether to overwrite context when updating source files, even if the context has been modified on Crowdin. This parameter is not used by this plugin, it is merely passed on to Crowdin when uploading source files. If defined, this parameter acts as the default for all translationFileSets.

* The default comment is This file has been generated automatically, modifications will be overwritten. If you'd like to change the content, please do so at Crowdin.

1.2.2.1 statusFile parameter description
Name Type Req. Default Description
addComment Boolean No true Sets whether or not a comment should be added at the top of the status file when deploying.
comment String No The comment to add at the top of the status file. If defined, this parameter overrides the corresponding global parameter.
encoding String No UTF-8 The encoding to use for the status file. The default is ISO 8859-1 if the file type is properties.
escapeUnicode Boolean No true This only applies if the type is properties. If true, Unicode characters will be encoded in the form \u<xxxx> where <xxxx> is the hexadecimal Unicode code point.
lineSeparator String No The alternative line separator to apply to the status file, for example \n or \r\n. If defined, this parameter overrides the corresponding global parameter.
sortLines Boolean No true This only applies if the type is properties. If true, this will sort the lines of the status file by key when deploying. The keys are "grouped" by .. Integer groups are sorted numerically, all other groups are sorted lexicographically. When comparing integer groups with non-integer groups, integer groups are sorted last.
targetFile String Yes The full path to this status file.
type Enum No properties The file type to use when deploying the status file. Valid values are properties and xml.
conversions List No A list of one or more conversion elements. A conversion element represents a "find and replace operation" that will be executed during deployment. It applies to the language codes only. See separate definition.
1.2.2.2 translationFileSet parameter description
Name Type Req. Default Description
addComment Boolean No true Whether or not a comment should be added at the top of translation files when deploying.
baseFileName String Yes The name or path to the "base language file" that should be uploaded to Crowdin for translation, relative to languageFilesFolder.
comment String No The comment to add at the top of translation files. If defined, this parameter overrides the corresponding global parameter.
commentTag String No # The character (sequence) to use if a comment is added during the deploy goal. This is not used for Properties, HTML or XML files.
crowdinPath String No The path from the root or branch root folder to the location of this set of files on Crowdin.
encoding String No UTF-8 The encoding to use for the deployed translation files. The default is ISO 8859-1 if the file type is properties.
escapeQuotes Integer No 0 Only valid if the type is properties. The Escape single quote Crowdin parameter. See separate definition. This is not used by this plugin, and is merely passed on to Crowdin when creating new files.
escapeSpecialCharacters Integer No 0 Only valid if the type is properties. The Escape special characters Crowdin parameter. Defines whether any special characters (=, :, ! and #) should be escaped by backslash. See separate definition. This is not used by this plugin, and is merely passed on to Crowdin when creating new files.
exportQuotes String No single Only valid if the type is js. Defines what type of quotes to use when exporting JavaScript translations. See separate definition. This is not used by this plugin, and is merely passed on to Crowdin when creating new files.
escapeUnicode Boolean No true Only valid if the type is properties. If true, Unicode characters will be encoded in the form \u<xxxx> where <xxxx> is the hexadecimal Unicode code point.
exportPattern String Yes This is used by Crowdin to generate filenames during export, and is the string specified under "Resulting file name when exported" in the file settings at Crowdin. It is also used by this plugin to parse the filenames exported from Crowdin to recognize placeholders. The placeholder codes are defined by Crowdin and are also listed in this table.
languageFilesFolder String Yes The folder where this set of files is located.
lineSeparator String No An alternative line separator to apply to the translation files, for example \n or \r\n. If defined, this parameter overrides the corresponding global parameter.
sortLines Boolean No true This only applies if the type is properties. If true, this will sort the lines of the translation files by key when deploying. The keys are "grouped" by .. Integer groups are sorted numerically, all other groups are sorted lexicographically. When comparing integer groups with non-integer groups, integer groups are sorted last.
targetFileName String No The file path relative to languageFilesFolder to use when deploying the translation files. If left blank, the path exported by Crowdin (exportPattern) is used. Any placeholders used in exportPattern can be used. In addition, these placeholders can be used independently of what is used in exportPattern.
title String No The title of this file as it should appear to translators at Crowdin.
type Enum No Auto The file type to use both when uploading to Crowdin and when processing files during the deploy goal. See separate definition. If not specified, auto-detection will be attempted based on the file extension.
updateOption Enum No Clear The Update or Restore File Crowdin API parameter. See separate definition. This is not used by this plugin, and is merely passed on to Crowdin. If defined, this parameter overrides the corresponding global parameter.
replaceModifiedContext Boolean No false Whether or not to overwrite context when updating the source file, even if the context has been modified on Crowdin.
writeBOM Boolean No false Whether or not to write a BOM (Byte Order Mark) at the beginning of the file when deploying translations files. This is only applicable to Unicode encodings, and generally isn't recommended for UTF-8. Despite this, some systems, like NSIS, requires a UTF-8 BOM to be present to interpret the file as UTF-8. In such cases, set this parameter to true.
conversions List No A list of one or more conversion elements. A conversion element represents a "find and replace operation" that will be executed during deployment. It applies to placeholders only and must match the complete placeholder. The content of any placeholders that match will be replaced. See separate definition.
excludes List No A list of one or more translation files to exclude. This is a basic filter that works on the file names exported from Crowdin, before any conversions are performed. It works like most file system searches, where the only wildcard characters are * and ?.
includes List No A list of one or more translation files to include. This is a basic filter that works on the file names exported from Crowdin, before any conversions are performed. It works like most file system searches, where the only wildcard characters are * and ?. If one or more include elements are defined, any paths that aren't included are excluded (it becomes a white-list).
1.2.2.3 conversion parameter description
Name Type Req. Description
from String Yes The value to match against any placeholder
to String Yes The value to replace the placeholder content with
1.2.2.4 escapeQuotes options
Code Description
0 Do not escape single quote
1 Escape single quote by another single quote
2 Escape single quote by backslash
3 Escape single quote by another single quote only in strings containing variables ({0})
1.2.2.5 escapeSpecialCharacters options
Code Description
0 Do not escape special characters
1 Escape special characters by a backslash
1.2.2.6 exportQuotes options
Code Description
single Output will be enclosed in single quotes
double Output will be enclosed in double quotes
1.2.2.7 updateOption options

Please note: These options have changed names in Crowdin's API v2.

Code Description
clear_translations_and_approvals Delete translations of changed strings (Previously delete_translations)
keep_translations Preserve translations of changed strings but remove approvals of those translations if they exist (Previously update_as_unapproved)
keep_translations_and_approvals Preserve translations and approvals of changed strings (Previously update_without_changes)
1.2.2.8 Crowdin file types
Code Description
auto Try to detect file type by extension or MIME type
android Android
macosx Mac OS X / iOS
resx .NET, Windows Phone
properties Java
gettext GNU GetText
yaml Ruby On Rails
php Hypertext Preprocessor
json Generic JSON
xml Generic XML
ini Generic INI
rc Windows Resources
resw Windows 8 Metro
resjson Windows 8 Metro
qtts Nokia Qt
joomla Joomla localizable resources
chrome Google Chrome Extension
dtd Mozilla DTD
dklang Delphi DKLang
flex Flex
nsh NSIS Installer Resources
wxl WiX Installer
xliff XLIFF
xliff_two XLIFF 2.0
html HTML
haml Haml
txt Plain Text
csv Comma Separated Values
md Markdown
mdx_v1 MDX (v1)
mdx_v2 MDX (v2)
flsnp MadCap Flare
fm_html Jekyll HTML
fm_md Jekyll Markdown
mediawiki MediaWiki
docx Microsoft Office, OpenOffice.org Documents, Adobe InDesign Adobe FrameMaker
xlsx Microsoft Excel
sbv Youtube .sbv
properties_play Play Framework
properties_xml Java Application
maxthon Maxthon Browser
go_json Go
dita DITA Document
mif Adobe FrameMaker
idml Adobe InDesign
stringsdict iOS
plist Mac OS property list
vtt Video Subtitling and WebVTT
vdf Steamworks Localization Valve Data File
srt SubRip .srt
stf Salesforce
toml Toml
contentful_rt Contentful
svg SVG
js JavaScript
coffee CoffeeScript
ts TypeScript
i18next_json i18next
xaml XAML
arb Application Resource Bundle
adoc Asc
fbt Facebook FBT
ftl Mozilla Project Fluent
webxml Web XML
nestjs_i18n NestJS i18n
1.2.2.9 Crowdin placeholders
Code Description
%language% Language name (e.g. Ukrainian).
%two_letters_code% Language code ISO 639-1 (i.e. uk).
%three_letters_code% Language code ISO 639-2/T (i.e. ukr).
%locale% Locale (i.e. uk-UA).
%locale_with_underscore% Locale (i.e. uk_UA).
%android_code% Android Locale identifier used to name values- folders.
%osx_code% macOS Locale identifier used to name .lproj folders.
%osx_locale% macOS Locale used to name translated resources (i.e. uk, zh_Hans).
%original_file_name% Original file name.
%file_name% File name without extension.
%file_extension% Original file extension.
%original_path% Use parent folders' names in your project to build the file path in the resulting archive.
1.2.2.10 Additional targetFileName placeholders
Code Description
%crowdin_code% Crowdin language code (i.e en-GB or da).
%crowdin_code_with_underscore% Crowdin language code with underscore (i.e en_GB or da).
%shortest_iso639_code% The shortest ISO 639 language code (i.e en or ceb).

1.2.3 Example project configuration

<project>
<!-- ... -->
  <build>
    <!-- ... -->
    <pluginManagement>
      <!-- ... -->
      <plugins>
        <!-- ... -->
        <plugin>
          <groupId>org.digitalmediaserver</groupId>
          <artifactId>crowdin-maven-plugin</artifactId>
          <version>...</version>   
          <configuration>
            <projectId>xxxxxx</projectID>
            <projectName>Digital Media Server</projectName>
            <crowdinServerId>crowdin</crowdinServerId>
            <downloadFolder>${project.basedir}/extras/crowdin</downloadFolder>
            <translationFileSets>
              <translationFileSet>
                <title>Digital Media Server</title>
                <languageFilesFolder>${project.basedir}/src/main/resources/i18n</languageFilesFolder>
                <baseFileName>messages.properties</baseFileName>
                <exportPattern>messages_%locale_with_underscore%.properties</exportPattern>
                <targetFileName>messages_%crowdin_code_with_underscore%.properties</targetFileName>
                <updateOption>keep_translations</updateOption>
                <conversions>
                  <conversion>
                    <from>es-ES</from><to>es</to>
                  </conversion>
                  <!-- ... -->
                </conversions>
                <excludes>
                  <!-- ... -->
                </excludes>
              </translationFileSet>
            </translationFileSets>
            <statusFiles>
              <statusFile>
                <targetFile>${project.basedir}/src/main/resources/languages.properties</targetFile>
                <conversions>
                  <conversion>
                    <from>es-ES</from><to>es</to>
                  </conversion>
                  <!-- ... -->
                </conversions>
              </statusFile>
            </statusFiles>
          </configuration>
        </plugin>
        <!-- ... -->
      </plugins>
      <!-- ... -->
    </pluginManagement>
    <!-- ... -->
  </build>
  <!-- ... -->
</project>

1.3 Migration

1.3.1 Migration from v1.x

Versions 1.x of this plugin use Crowdin API v1, which is no longer supported. Versions 2.x use Crowdin API v2 instead. This plugin aims to follow the Crowdin terminology and options as closely, to make Crowdin's documentation as applicable as possible. The changes between the two API versions at Crowdin has therefore led to some changes in this plugin's configuration as well.

While this documentation has been updated, it can be hard to spot what's changed. So, here is a "quick migration guide" covering the things you're most likely to have to address if you migrate from 1.x to 2.x.

  • API v1 used a "project identifier" string and an "API key". API v2 uses a "project Id" number and an "API token" instead. The API token is unique for each Crowdin user. Configuration wise, the "project identifier" used to be configured as <username> in the Maven settings. <username> is no longer used by this plugin and the "project Id" is instead configured in the plugin configuration under <projectId>. The API token must still be configured in the Maven settings under <password>, where the API key used to be.
  • The updateOptions options have changed names, the new option names can be found here.
  • escapeQuotes is no longer a global parameter - it must be configured per translationFileSet.
  • New parameter replaceModifiedContext which governs how to deal with contexts conflicts.
  • The fileNameWhenExported parameter has been renamed to exportPattern.
  • New parameter escapeSpecialCharacters for Java properties files.
  • New parameter exportQuotes for JavaScript files.
  • New build parameters skipUntranslatedStrings, skipUntranslatedFiles and exportApprovedOnly.
  • New parameter httpTimeout to control HTTP timeouts.
  • New parameter buildTimeout to control how long to wait for a build to finish.

All applicable parameters have been given defaults that is the same or similar to previous behavior, so unconfigured parameters can most likely stay unconfigured.

It's advisable to pay close attention to the first pushes and pulls to make sure that everything behaves as expected, as there are many changes "under the hood".

2. Using the plugin

Using Crowdin branches with this plugin requires a local Git repository. The plugin will automatically look up the current Git branch and synchronize with a Crowdin branch with the same name, unless the current Git branch matches the rootBranch parameter, in which case the plugin will synchronize with the Crowdin "root". If no Git branch is found (e.g. checked out to a tag or detached) all goals except deploy will fail. This allows translation of a branch while it's being worked on and merging of the translations at Crowdin when the branch is merged. For further information about versions management and branches on Crowdin, see the Crowdin documentation.

If you do not wish to use branches, you can disable it by setting the disableBranches parameter to true. This also disables the reliance on Git, so that the plugin can be used even if the Maven project doesn't reside in a Git repository.

If the configuration is correct, you can execute a goal with:

mvn crowdin-maven-plugin:<goal> [-D<property>=<value>]

The prefix or alias crowdin will be resolved to this plugin, unless another plugin configured in the same pom.xml use the same alias and registers it first. That means that it is very likely that you can instead execute a goal with:

mvn crowdin:<goal> [-D<property>=<value>]

This short form will be used in the descriptions below.

2.1 Pushing strings for translation to Crowdin

Goal Command Description
push mvn crowdin:push -Dconfirm=true Uploads the base language file to Crowdin. Any strings already present on Crowdin that's missing in the uploaded file will be deleted from Crowdin together with all corresponding translations. To avoid accidental pushes, an extra argument confirm is required for push.

2.2 Getting translations from Crowdin

Goal Command Description
fetch mvn crowdin:fetch Builds a downloadable zip file containing the latest translations, then downloads and extracts the zip file from Crowdin to downloadFolder.
deploy mvn crowdin:deploy Applies any transformations and deploys the files from downloadFolder into their intended locations as defined by the translationsFileSets and the statusFiles.
pull mvn crowdin:pull Executes fetch and deploy in sequence. This is a convenience goal combining the individual steps needed to get the latest translations from Crowdin built and deployed into your local project.

2.3 Cleaning the intermediate folder

Goal Command Description
clean mvn crowdin:clean Deletes all content in downloadFolder.

The clean goal also binds to the clean phase, which means that it's automatically executed when mvn clean is run.

About

A Maven plugin for synchronizing translations with Crowdin

crowdintranslationinternationalizationlocalizationmavenmaven-pluginjavajava-7

License:GNU Lesser General Public License v3.0

Languages

Language:Java 100.0%