Parameter expansion in environment variables

[jloewe]

Is your feature request related to a problem? Please describe. When passing environment variables to a remote host, they are interpreted as strings and no parameter expansion is done.

hosts:
  "":
    +e:
        - STARSHIP_CONFIG="${XDG_CONFIG_HOME}/starship.toml"

Current behaviour:

remote ~> echo $STARSHIP_CONFIG
${XDG_CONFIG_HOME}/starship.toml

My expectation:

remote ~> echo $STARSHIP_CONFIG
/home/user/.config/starship.toml

Describe the solution you'd like

A simple solution could be to explicitly run the expansion after base64 decoding the environment variables.

https://github.com/xxh/xxh-shell-zsh/blob/c262881dd389abe2b3b15ca672c51b16d23028de/entrypoint.sh#L59

# after the line above run the parameter expansion explicitly
val=$(eval "echo \"$val\"")

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[anki-code]

Hey! PR is welcome!