feat: Features - filesystem, hash functions - #9
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- Add new filter_env() custom function for glob-pattern matching of environment variables
- Supports wildcards: * (any characters) and ? (single character)
- Returns sorted array of {key, value} objects
- Add regex dependency for pattern matching
- Add comprehensive unit tests for filter_env function
- Add integration test with fixtures
- Add example template (examples/server-config.tmpl)
- Update README with filter_env documentation and examples
- Update features list to mention filter_env
The filter_env() function allows users to filter environment variables by pattern
(e.g., filter_env(pattern="SERVER_*")) and iterate over matching variables in templates.
This is useful for generating configuration files, export scripts, and environment-specific
settings without hardcoding variable names.
Example usage:
{% for var in filter_env(pattern="SERVER_*") %}
{{ var.key }}={{ var.value }}
{% endfor %}
- Add format_tera_error() function to format errors with detailed context
- Show line numbers, column positions, and expected tokens for parse errors
- Display variable names and context for runtime errors
- Show function call failures with argument details
- Include full error chain (error causes) in output
Before:
Error: Failed to parse template: Failed to parse 'template'
After:
Failed to parse template
Error: Failed to parse 'template'
Caused by:
--> 4:1
|
4 |
| ^---
|
= expected `%}` or `-%}`
This makes debugging templates much easier by providing actionable error messages
with precise locations and clear explanations of what went wrong.
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