An alternative solution to direnv dropping aliases and functions

Sun, 12 Oct 2025 00:00:00 +0000

Direnv’s inability to export shell-specific aliases and functions, due to its shell-agnostic design, can be addressed in Nix by using pkgs.writeScriptBin to create executable scripts instead.

Manipulating Directories - Shell Builtins cd pushd and popd

Thu, 04 Sep 2025 00:00:00 +0000

Most modern shells have a set of shell builtins (e.g. zsh), some of which can be used to manipulate directories.

To manipulate directories, a directory stack structure is maintained in memory. In bash it can also be accessed through the $DIRSTACK shell variable. bash’s introduction to the directory stack, zsh’s introduction to the directory stack

With pushd and popd, you can enter a series of directories and leave them in reverse order.

[1:cuso4d@nightcord-laborari:~]
$ pwd
/home/cuso4d
[1:cuso4d@nightcord-laborari:~]
$ pushd ~/source/zsh
~/source/zsh ~
[1:cuso4d@nightcord-laborari:~/source/zsh on master]
$ pushd ~/.ssh
~/.ssh ~/source/zsh ~
[1:cuso4d@nightcord-laborari:~/.ssh]
$ popd
~/source/zsh ~
[1:cuso4d@nightcord-laborari:~/source/zsh on master]
$ popd
~
[1:cuso4d@nightcord-laborari:~]
$ pwd
/home/cuso4d

Taking zsh as an example, the directory stack is implemented as a linked list. It is located in Src/Bulitin.c.

Shell on CuSO4_Deposit

An alternative solution to direnv dropping aliases and functions

Manipulating Directories - Shell Builtins cd pushd and popd