modify .bashrc and alike

.bash_logout

@@ -1,3 +1,5 @@
+# shellcheck shell=bash
 #
 # ~/.bash_logout
+# sourced when an interactive login shell exits, or a non-interactive login shell executes `exit`
 #

.bash_profile

@@ -1,8 +1,33 @@
-#!/bin/bash
+# shellcheck shell=bash
+# shellcheck disable=1091
 #
 # ~/.bash_profile
+# sourced upon new login shells
 #
 
-[[ -d ~/.local/bin ]] && PATH="$PATH:$HOME/.local/bin" # add path variable
-[[ -x ~/.bashrc ]] && source "$HOME/.bashrc"           #execute bashrc
+# https://specifications.freedesktop.org/basedir-spec/latest/
+export XDG_CONFIG_HOME="$HOME/.config"     # where user configuration files are stored (default: ~/.config)
+export XDG_STATE_HOME="$HOME/.local/state" # state data that should persist between (application) restarts, but not important enough to be stored in XDG_DATA_HOME (default: ~/.local/state)
+export XDG_DATA_HOME="$HOME/.local/share"  # where user data files are stored (default: ~/.local/share)
+export PATH="$HOME/bin:$PATH"              # add our bin in front of PATH, making it take precedence
 
+if which nvim 1>/dev/null; then
+	export EDITOR=nvim           # use neovim as an editor
+	export VISUAL=nvim           # use neovim for visual-based editors
+	export MANPAGER='nvim +Man!' # use neovim as a manual pager
+fi
+
+# coloured GCC warnings and errors
+export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
+
+# # export Microsoft's bullshit outta here
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+export VCPKG_DISABLE_METRICS=1
+export VCPKG_ROOT="$XDG_DATA_HOME/vcpkg"
+export PATH+=":$VCPKG_ROOT"
+
+# if executing interactively
+# execute .bashrc in the current login context
+[[ $- != *i* ]] && return
+[[ -z ${PS1-} ]] && retrun
+[[ -f $HOME/.bashrc ]] && . "$HOME/.bashrc"

.bashrc

@@ -1,7 +1,8 @@
-#!/usr/bin/env bash
+# shellcheck shell=bash
 # shellcheck disable=SC1090,SC1091
 #
 # ~/.bashrc
+# sourced upon launch of an interactive shell, which isn't a login shell has been executed
 #
 
 # If not running interactively, don't do anything
@@ -11,9 +12,9 @@
 # wrapper for lazily loading __git_ps1 whenever it is actually needed
 _lazy_git_ps1() {
 	if [[ -z $__GIT_PROMPT_SOURCED ]]; then
-		if [[ -d .git || $(git rev-parse --is-inside-work-tree 2>/dev/null) == true ]]; then
 			source /usr/share/bash-completion/completions/git &>/dev/null
 			source /usr/share/git/completion/git-prompt.sh &>/dev/null
+		if [ -d .git ] || git worktree list &>/dev/null; then
 			export __GIT_PROMPT_SOURCED=1
 			__git_ps1 "$@"
 		fi
@@ -44,7 +45,7 @@ _make() {
 # set PS1
 PS1=
 PS1="$PS1"'\[\033[01;35m\]\u@\h'            # user@host
-PS1="$PS1"'\[\033[00m\]:'                   # seperator
+PS1="$PS1"'\[\033[00m\]:'                   # separator
 PS1="$PS1"'\[\033[01;34m\]\w'               # working directory
 PS1="$PS1"'\[\033[01;93m\]$(_lazy_git_ps1)' # github branch
 PS1="$PS1"'\[\033[00m\]\$ '                 # shell sign
@@ -54,18 +55,7 @@ HISTCONTROL=ignoreboth # don't put duplicate lines or lines starting with space
 HISTSIZE=1000
 HISTFILESIZE=2000
 
-export MANPAGER='nvim +Man!'                                                           # use neovim as a manual pager
-export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01' # coloured GCC warnings and errors
-export EDITOR=nvim                                                                     # use neovim as an editor
-export VISUAL=nvim                                                                     # use neovim for visual-based editors
-
-# export Microsoft's bullshit outta here
-export DOTNET_CLI_TELEMETRY_OPTOUT=1
-export VCPKG_DISABLE_METRICS=1
-
 # vcpkg shit
-export VCPKG_ROOT=$HOME/.local/share/vcpkg
-export PATH=$VCPKG_ROOT:$PATH
 source /home/user/.local/share/vcpkg/scripts/vcpkg_completion.bash &>/dev/null
 
 # check the window size after each command (and if necessary, the values of LINES and COLUMNS)