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docs: _PR_LIB example

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modules.md
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@ -48,8 +48,24 @@ If exposing modules in `PATH` annoys you, you can set the `_PR_LIB` environment
Example in a [FHS 3.0 compliant system](https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s06.html): Example in a [FHS 3.0 compliant system](https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s06.html):
```shell ```shell
export _PR_LIB_DIR="/usr/lib:$HOME/.local/lib" export _PR_LIB="/usr/lib:$HOME/.local/lib"
``` ```
This is not the default as there is no general way to know its value and depends on distribution (`/usr/lib`, `/usr/libexec`, `/data/data/com.termux/files/usr/libexec`, etc.). System programs usually have a hard-coded path looking for `lib`. If you are a package maintainer for a distribution, setting this value when compiling, so it fits into your distribution standard. This is not the default as there is no general way to know its value and depends on distribution (`/usr/lib`, `/usr/libexec`, `/data/data/com.termux/files/usr/libexec`, etc.). System programs usually have a hard-coded path looking for `lib`. If you are a package maintainer for a distribution, setting this value when compiling, so it fits into your distribution standard.
If you installed the module with `cargo install`, the binary will be placed in `bin` subdirectory under Cargo's home which should be in the `PATH` anyway. Cargo has no option to place in subdirectories with other names. If you installed the module with `cargo install`, the binary will be placed in `bin` subdirectory under Cargo's home which should be in the `PATH` anyway. Cargo has no option to place in subdirectories with other names.
The following snippet is what I used to package for Arch Linux package, adding a `_PR_LIB` declaration along with initialization. The script is `/usr/bin/pay-respects` and the actual executable is located somewhere else.
```sh
#!/bin/sh
if [ "$#" -gt 1 ]; then
SHELL=$(basename $SHELL)
if [ "$SHELL" = "fish" ]; then
echo "set -x _PR_LIB /usr/lib/pay-respects:$HOME/.local/lib/pay-respects"
elif [ "$SHELL" = "nu" ]; then
echo "env:_PR_LIB=/usr/lib/pay-respects:$HOME/.local/lib/pay-respects"
else
echo "_PR_LIB=/usr/lib/pay-respects:$HOME/.local/lib/pay-respects"
fi
fi
/opt/pay-respects/bin/pay-respects "$@"
```