improve bashrc layout and performance

.bashrc

@@ -7,28 +7,49 @@
 [[ $- != *i* ]] && return
 [[ -z "${PS1-}" ]] && return
 
-# check the window size after each command (and if necessary, the values of LINES and COLUMNS)
-shopt -s checkwinsize
+# set PS1
+PS1=
+PS1="$PS1"'\[\033[01;35m\]\u@\h'            # user@host
+PS1="$PS1"'\[\033[00m\]:'                   # seperator
+PS1="$PS1"'\[\033[01;34m\]\w'               # working directory
+PS1="$PS1"'\[\033[01;93m\]$(_lazy_git_ps1)' # github branch
+PS1="$PS1"'\[\033[00m\]\$ '                 # shell sign
 
 # history settings
 HISTCONTROL=ignoreboth # don't put duplicate lines or lines starting with space in the history.
 HISTSIZE=1000
 HISTFILESIZE=2000
 
-source /usr/share/bash-completion/completions/git
-source /usr/share/git/completion/git-prompt.sh
-
-PS1=
-PS1="$PS1"'\[\033[01;35m\]\u@\h'        # user@host
-PS1="$PS1"'\[\033[00m\]:'               # seperator
-PS1="$PS1"'\[\033[01;34m\]\w'           # working directory
-PS1="$PS1"'\[\033[01;93m\]$(__git_ps1)' # github branch
-PS1="$PS1"'\[\033[00m\]\$ '             # shell sign
-
-export EDITOR=nvim
-
+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
-eval "$(_AUTO_CPUFREQ_COMPLETE=bash_source auto-cpufreq)"
+export EDITOR=nvim                                                                     # use neovim as an editor
+export VISUAL=nvim                                                                     # use neovim for visual-based editors
+
+# export Microsoft's bullshit outta here
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+export VCPKG_DISABLE_METRICS=1
+
+# vcpkg shit
+export VCPKG_ROOT=$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)
+shopt -s checkwinsize
+
+# wrapper for lazily loading __git_ps1 whenever it is actually needed
+_lazy_git_ps1() {
+	if [[ -z $__GIT_PROMPT_SOURCED ]]; then
+		if [[ -d .git || $(git rev-parse --is-inside-work-tree 2>/dev/null) == true ]]; then
+			source /usr/share/bash-completion/completions/git &>/dev/null
+			source /usr/share/git/completion/git-prompt.sh &>/dev/null
+			export __GIT_PROMPT_SOURCED=1
+			__git_ps1 "$@"
+		fi
+	else
+		__git_ps1 "$@"
+	fi
+}
 
 #
 # aliases
@@ -56,34 +77,6 @@ alias mv='mv -i'
 alias :qa='exit'
 alias :q='exit'
 alias py3='python3'
-alias hgit='git --git-dir=$HOME/.home-conf.git --work-tree=$HOME'
-
-__git_complete hgit __git_main
-
-# vcpkg shit
-export VCPKG_ROOT=$HOME/.local/share/vcpkg
-export PATH=$VCPKG_ROOT:$PATH
-source /home/user/.local/share/vcpkg/scripts/vcpkg_completion.bash
-
-# opt out of Microsoft's telemetry bullshit
-export DOTNET_CLI_TELEMETRY_OPTOUT=1
-export VCPKG_DISABLE_METRICS=1
-
-# customise less
-# Have less display colours
-# from: https://wiki.archlinux.org/index.php/Color_output_in_console#man
-export LESS_TERMCAP_mb=$'\e[1;31m'     # begin bold
-export LESS_TERMCAP_md=$'\e[1;33m'     # begin blink
-export LESS_TERMCAP_so=$'\e[01;44;37m' # begin reverse video
-export LESS_TERMCAP_us=$'\e[01;37m'    # begin underline
-export LESS_TERMCAP_me=$'\e[0m'        # reset bold/blink
-export LESS_TERMCAP_se=$'\e[0m'        # reset reverse video
-export LESS_TERMCAP_ue=$'\e[0m'        # reset underline
-
-# customise man pager to use the correct parameters
-export MANPAGER='less -s -M +Gg'
 
 # cute lil hyfetch :3
-if [[ $TERM == "xterm-kitty" ]]; then
-	hyfetch
-fi
+[[ $TERM == "xterm-kitty" ]] && hyfetch