So I initialized CAS using cas-initializr with the following command inside the cas folder:
curl https://casinit.herokuapp.com/starter.tgz -d "dependencies=core,bootadmin,metrics,gitsvc,jsonsvc,redis,support-themes-core" | tar -xzvf -
My theme name is example. Here is the file structure of cas/src/main/resources/templates:
templates
├── META-INF
│ └── spring.factories
├── application.yml
├── example.properties
├── static
│ └── themes
│ └── example
│ ├── css
│ │ └── cas.css
│ ├── images
│ │ ├── favicon.ico
│ │ └── logo.png
│ └── js
│ └── cas.js
└── templates
└── example
└── casLoginView.html
The content of casLoginView.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
The content of example.properties:
cas.theme.name=Example Theme
cas.theme.description=Example - Central Authentication Service
cas.standard.css.file=/themes/example/css/cas.css
cas.standard.js.file=/themes/example/js/cas.js
cas.logo.file=/themes/example/images/logo.png
cas.favicon.file=/themes/example/images/favicon.ico
cas.drawer-menu.enabled=false
cas.notifications-menu.enabled=false
cas.login-form.enabled=true
My cas.properties file located at /etc/cas/config/:
cas.server.name=https://localhost:8443
cas.server.prefix=${cas.server.name}/cas
cas.serviceRegistry.json.location=file:/etc/cas/services
# cas.authn.accept.enabled=false
server.ssl.key-store=file:/etc/cas/thekeystore
server.ssl.key-store-password=changeit
cas.theme.defaultThemeName=example
spring.thymeleaf.cache=false
After I started the server with ./gradlew bootRun, I opened https://localhost:8443/cas/login on my chrome browser. The CSS, Image and JS seems to load fine (I confirmed it using Chrome Devtool), but the default template was used instead of my custom template.
I had tried googling around for several hours now and I still can't figure out how to make cas load my html template.
P/s: I tried moving all the resources content to cas/build/resources, cas/build/resources/main but it does not seem to work either.
Starting with 6.4 RC5 (which is the version you run as of this writing and should provide this in your original post):
https://apereo.github.io/cas/development/release_notes/RC5.html#thymeleaf-user-interface-pages
Please read the release notes and adjust your setup.
All templates are listed here: https://apereo.github.io/cas/development/ux/User-Interface-Customization-Views.html#templates