Cormac Shannon 42baabde34 Implement $VAR expansion in commands (issue #25) ...

Extend read_command_body() to detect $NAME and trigger interpolation
using the same fragment-split mechanism as ${expr}. The lexer collects
the identifier into cmd_envvar; the parser's unified parseinterp()
branches on it to emit tostring(getenv(NAME)).

2026-03-18 08:35:46 +00:00

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