shellenv

Print evaluated variables in shell export instructions.

This allows sharing environment variables between shells.

Currently, only bash and fish syntaxes are supported.

Build & Install

# Copy template
install -bv env.template ~/.config/shellenv/env

# Copy binary
cargo build --release
install -bsv target/release/shellenv ~/.local/bin/

## Build in nightly channel
# cargo +nightly build -Z build-std=std --release --target x86_64-unknown-linux-gnu
# install -sv target/x86_64-unknown-linux-gnu/release/shellenv ~/.local/bin/

For Fish shell, add the following to ~/.config/fish/config.fish

$HOME/.local/bin/shellenv --format fish $HOME/.config/shellenv/env | source

For Bash shell, add the following to ~/.bashrc

source <("${HOME}/.local/bin/shellenv" --format bash "${HOME}/.config/shellenv/env")

For Dash shell, use eval "$(...))" to source the output command (untested).

See shellenv --help for available options.

Parameter Expansion

Basic parameter expansion is supported:

${VAR}, ${VAR:-default}, ${VAR:+alt}, and their counterparts without colons.

Nested expansion is also allowed in value: ${VAR:-${VAR2}}.

But expansion in parameter name (i.e. ${${NAME}:-default}) is not supported.

Also, ~ is not expanded; use ${HOME} instead.

Others

Afterword

The compiled binary is big (~1MiB after strip). The clap crate is roughly 50% the cause. See cargo bloat for proportions.