feat: add pascalcase function to sprig

[smoto-shei-applibot]

Title

feat: add pascalcase function and change camelcase behavior

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Description

This pull request introduces two changes to the sprig library:

1. Added a pascalcase function

A new function, pascalcase, has been added to the funcMap. This function converts strings to upper camel case (PascalCase) using xstrings.ToPascalCase.

Example

go
{{ pascalcase "hello_world" }}
// Output: HelloWorld

2. Modified the behavior of camelcase

The camelcase function has been updated to explicitly provide lower camel case (lowerCamelCase) behavior using xstrings.ToCamelCase.

Breaking Change

This modification introduces a breaking change, as the previous camelcase function used to convert to upper camel case (PascalCase). However:

• This aligns with the general convention where camelcase implies lower camel case.
• It is more intuitive for new users of sprig.

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Rationale

1. Improved clarity for new users: By distinguishing camelcase (lower camel case) and pascalcase (upper camel case), the library becomes easier to understand and use.
2. Backward compatibility tradeoff: While this change introduces a breaking change for existing users of camelcase, the new behavior makes the function naming consistent with common expectations.

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Tests Added

• Unit tests for both pascalcase and the updated camelcase have been added to ensure expected behavior.
• Test cases include scenarios with:
  • Underscores (_)
  • Hyphens (-)
  • Spaces
  • Mixed cases

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Backward Compatibility

• camelcase behavior change: May affect existing users relying on the previous upper camel case functionality.
• New pascalcase function: Provides a clear alternative for upper camel case conversion.

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Example Comparison

Input String | Old camelcase | New camelcase | New pascalcase -- | -- | -- | -- hello_world | HelloWorld | helloWorld | HelloWorld go-programming-lang | GoProgrammingLang | goProgrammingLang | GoProgrammingLang

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Checklist