86 lines
4.4 KiB
Text
86 lines
4.4 KiB
Text
[[_migrate_themes]]
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== Migrating Themes
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If you have created any custom themes they must be migrated to the new server. Any changes to the built-in themes might
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need to be reflected in your custom themes, depending on which aspects you have customized.
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You must copy your custom themes from the old server "themes" directory to the new server "themes" directory.
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After that you need to review the changes below and consider if the changes need to be applied to your custom theme.
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In summary:
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* If you have customized any of the changed templates listed below you need to compare the template from the base theme
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to see if there are changes you need to apply.
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* If you have customized any of the styles and are extending the {project_name} themes you need to review the changes to
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the styles. If you are extending the base theme you can skip this step.
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* If you have customized messages you might need to change the key or value or to add additional messages.
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ifeval::[{project_product}==true]
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Each step is described in more detail below the list of changes.
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include::rhsso/migrate_themes-changes-73.adoc[leveloffset=0]
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include::rhsso/migrate_themes-changes-72.adoc[leveloffset=0]
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include::rhsso/migrate_themes-changes-71.adoc[leveloffset=0]
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endif::[]
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=== Migrating Templates
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If you have customized any of the templates you need to carefully review the changes that have been made to the templates
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to decide if you need to apply these changes to your customized templates. Most likely you will need to apply the same
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changes to your customized templates. If you have not customized any of the listed templates you can skip this section.
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A best practice is to use a diff tool to compare the templates to see what changes you might need to make to your
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customized template. If you have only made minor changes it is simpler to compare the updated template to your
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customized template. However, if you have made many changes it might be easier to compare the new template to your
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customized old template, as this will show you what changes you need to make.
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The following screenshot compares the info.ftl template from the Login theme and an example custom theme:
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.Comparison of the updated version of a Login theme template with an example custom Login theme template
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image:images/theme-migration-meld-info-1.png[]
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From this comparison it is easy to identify that the first change ("Hello world!!") was a customization, while the
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second change ("if pageRedirectUri") is a change to the base theme. By copying the second change to your custom template,
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you have successfully updated your customized template.
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For the alternative approach the following screenshot compares the info.ftl template from the old installation with
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the updated info.ftl template from the new installation:
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.Comparison of an example custom Login theme template with the updated version of the Login theme template
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image:images/theme-migration-meld-info-2.png[]
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From this comparison it is easy to identify what has been changed in the base template. You will then manually have to
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make the same changes to your modified template. Since this approach is not as simple as the first approach, only use
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this approach if the first one is not feasible.
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=== Migrating Messages
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If you have added support for another language, you need to apply all the changes listed above. If you have not added
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support for another language, you might not need to change anything; you only have to make changes if you have changed
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an affected message in your theme.
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For added values, review the value of the message in the base theme to determine if you need to customize that message.
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For renamed keys, rename the key in your custom theme.
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For changed values, check the value in the base theme to determine if you need to make changes to your custom theme.
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=== Migrating Styles
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If you are inheriting styles from the keycloak or rh-sso themes you might need to update your custom styles to reflect
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changes made to the styles from the built-in themes.
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A best practice is to use a diff tool to compare the changes to stylesheets between the old server installation and the
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new server installation.
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For example, using the diff command:
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[source,bash,subs=+attributes]
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----
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$ diff {project_dirref}_OLD/themes/keycloak/login/resources/css/login.css \
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{project_dirref}_NEW/themes/keycloak/login/resources/css/login.css
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----
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Review the changes and determine if they affect your custom styling.
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