Add environment variable fallback to hide passwords from CLI output #8
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DuckDB v1.2.0 CLI displays all function parameters in plain text,
exposing credentials in terminal output and history. This change adds
environment variable support for secure credential configuration.
Changes:
- config_function.go: Add DUCKARROW_PASSWORD and DUCKARROW_USERNAME
environment variable fallback when parameters are empty strings
- README.md: Add Password Security section documenting env var usage
- tests/env_var_test.sql: Add comprehensive test coverage
- .gitignore: Add AGENTS.md to ignore agent documentation
- internal/flight/pool_test.go: Formatting cleanup (go fmt)
Priority order: Function parameter > Environment variable > Empty string
Usage:
export DUCKARROW_PASSWORD='secret'
duckdb -c "SELECT duckarrow_configure('grpc://...', 'user', '', true);"
Backward compatible: Direct parameter passing continues to work unchanged.
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DuckDB v1.2.0 CLI displays all function parameters in plain text, exposing credentials in terminal output and history. This change adds environment variable support for secure credential configuration.
Changes:
Priority order: Function parameter > Environment variable > Empty string
Usage:
export DUCKARROW_PASSWORD='secret' duckdb -c "SELECT duckarrow_configure('grpc://...', 'user', '', true);"
Backward compatible: Direct parameter passing continues to work unchanged.