diff --git a/.gitignore b/.gitignore
index 2d71b13..4477544 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 Brewfile.lock.json
 *.log
 *-secret
+*cache
 .idea
 .vscode
-
diff --git a/base/zshrc b/base/zshrc
index eed0109..386bc8f 100644
--- a/base/zshrc
+++ b/base/zshrc
@@ -6,6 +6,8 @@ colors
 
 # Defaults
 export DOTFILES="$HOME/.dotfiles"
+# shellcheck source=shared.sh
+source "$DOTFILES/scripts/shared.sh"
 
 # Run x-load-configs in your terminal to reload the files.
 function x-load-configs()
@@ -28,14 +30,14 @@ ANTIGEN_ZSH_PATH="$XDG_BIN_HOME/antigen.zsh"
 [[ -f "$ANTIGEN_ZSH_PATH" ]] && source "$ANTIGEN_ZSH_PATH"
 
 # antigen is present
-if command -v antigen &> /dev/null; then
+have antigen && {
   antigen use oh-my-zsh
 
   # config/functions
   x-default-antigen-bundles
 
   antigen apply
-fi
-
-eval "$(starship init zsh)"
+}
 
+# starship is present
+have starship && eval "$(starship init zsh)"
diff --git a/config/alias b/config/alias
index 46b3f14..527d71b 100755
--- a/config/alias
+++ b/config/alias
@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
+# shellcheck source="../scripts/shared.sh"
+source "$DOTFILES/scripts/shared.sh"
 
 # Get installed php versions from brew and setup aliases
 function x-set-php-aliases
 {
-  if command -v brew &> /dev/null; then
+  have brew && {
     local php_versions=()
     while IFS="" read -r line; do php_versions+=("$line"); done < <(brew list | grep '^php')
 
@@ -31,7 +33,7 @@ function x-set-php-aliases
       # shellcheck disable=SC2139,SC2140
       alias "${php_alias}c"="$php_exec $php_error_reporting $(which composer)"
     done
-  fi
+  }
 }
 
 if [[ $(uname) == 'Darwin' ]]; then
@@ -74,10 +76,8 @@ alias code_scanner='docker run
 
 alias zedit='$EDITOR ~/.dotfiles'
 
-if hash irssi 2> /dev/null; then
-  # shellcheck disable=2139
+have irssi && \
   alias irssi="irssi --config='$IRSSI_CONFIG_FILE' --home='$IRSSI_CONFIG_HOME'"
-fi
 
 if [[ -f "$HOME/.aliases.local" ]]; then
   # shellcheck disable=SC1091
diff --git a/config/exports b/config/exports
index c486de9..d3f635c 100755
--- a/config/exports
+++ b/config/exports
@@ -3,7 +3,8 @@
 # vim: filetype=zsh
 
 export DOTFILES="$HOME/.dotfiles"
-export PATH="$DOTFILES/local/bin:$PATH"
+source "$DOTFILES/scripts/shared.sh"
+path_append "$DOTFILES/local/bin"
 
 # Explicitly set XDG folders
 # https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
@@ -23,21 +24,20 @@ export HOMEBREW_SBIN="$HOMEBREW/sbin"
 export HOMEBREW_PKG="$HOMEBREW/opt"
 export HOMEBREW_NO_ENV_HINTS=1
 
-export PATH="$XDG_BIN_HOME:$HOMEBREW_BIN:$HOMEBREW_SBIN:/usr/local/sbin:$PATH"
+path_append "/usr/local/bin"
+path_append "$HOMEBREW_SBIN"
+path_append "$HOMEBREW_BIN"
+path_append "$XDG_BIN_HOME"
 
 # brew, https://brew.sh
-if command -v brew &> /dev/null; then
-  BREW_PYTHON=$(brew --prefix python)/bin
-  GNUBIN_DIR=$(brew --prefix coreutils)/libexec/gnubin
-  BREW_RUBY=$(brew --prefix ruby)/bin
-  BREW_GEMS=$(gem environment gemdir)/bin
-
-  export PATH="$BREW_PYTHON:$GNUBIN_DIR:$BREW_GEMS:$BREW_RUBY:$PATH"
-fi
+have brew && {
+  path_append "$(brew --prefix python)/bin"
+  path_append "$(brew --prefix coreutils)/libexec/gnubin"
+  path_append "$(brew --prefix ruby)/bin"
+  path_append "$(gem environment gemdir)/bin"
+}
 
 source "$DOTFILES/config/exports-shell"
 source "$DOTFILES/config/exports-apps"
 
-if command -v nvim &> /dev/null; then
-  export EDITOR="nvim"
-fi
+have nvim && export EDITOR="nvim"
diff --git a/config/exports-apps b/config/exports-apps
index cacdec2..86a5e93 100755
--- a/config/exports-apps
+++ b/config/exports-apps
@@ -2,6 +2,7 @@
 # shellcheck shell=bash
 # shellcheck enable=external-sources
 # vim: filetype=zsh
+source "$DOTFILES/scripts/shared.sh"
 
 # Antigen configuration
 # https://github.com/zsh-users/antigen/wiki/Configuration
@@ -11,61 +12,62 @@ export ANTIGEN_PLUGIN_RECEIPT_F=".local/share/antigen/antigen_plugin_lastupdate"
 
 # Ansible configuration
 # https://docs.ansible.com/ansible/latest/reference_appendices/config.html
-if hash ansible 2> /dev/null; then
+have ansible && {
   export ANSIBLE_HOME="$XDG_CONFIG_HOME/ansible"
   export ANSIBLE_CONFIG="$XDG_CONFIG_HOME/ansible.cfg"
   export ANSIBLE_GALAXY_CACHE_DIR="$XDG_CACHE_HOME/ansible/galaxy_cache"
   x-dc "$ANSIBLE_HOME"
   x-dc "$ANSIBLE_GALAXY_CACHE_DIR"
-fi
+}
 
 # composer, https://getcomposer.org/
-if command -v composer &> /dev/null; then
+have composer && {
   export COMPOSER_HOME="$XDG_STATE_HOME/composer"
   export COMPOSER_BIN="$COMPOSER_HOME/vendor/bin"
   export PATH="$COMPOSER_BIN:$PATH"
-fi
+}
 
 # docker, https://docs.docker.com/engine/reference/commandline/cli/
-if command -v docker &> /dev/null; then
+have docker && {
   export DOCKER_CONFIG="$XDG_CONFIG_HOME/docker"
   x-dc "$DOCKER_CONFIG"
-fi
+}
 
 # ffmpeg
-if hash ffmpeg 2> /dev/null; then
+have ffmpeg && {
   export FFMPEG_DATADIR="$XDG_CONFIG_HOME/ffmpeg"
   x-dc "$FFMPEG_DATADIR"
-fi
+}
 
 # gcloud
-if hash gcloud 2> /dev/null; then
+have gcloud && {
   GCLOUD_LOC=$(gcloud info --format="value(installation.sdk_root)" --quiet)
   [[ -f "$GCLOUD_LOC/path.zsh.inc" ]] && builtin source "$GCLOUD_LOC/path.zsh.inc"
   [[ -f "$GCLOUD_LOC/completion.zsh.inc" ]] && builtin source "$GCLOUD_LOC/completion.zsh.inc"
-fi
+}
 
 # gem, rubygems
-if command -v gem &> /dev/null; then
+have gem && {
   export GEM_HOME="$XDG_STATE_HOME/gem"
   export GEM_PATH="$XDG_STATE_HOME/gem"
   export PATH="$GEM_HOME/bin:$PATH"
-fi
+  path_append "$GEM_PATH/bin"
+}
 
 # If we have go packages, include them to the PATH
-if command -v go &> /dev/null; then
+have go && {
   export GOPATH="$XDG_DATA_HOME/go"
   export GOBIN="$XDG_BIN_HOME"
   x-dc "$GOPATH"
-fi
+}
 
 # irssi
-if hash irssi 2> /dev/null; then
+have irssi && {
   # These variables are used in ./alias with --config and --home
   export IRSSI_CONFIG_HOME="$XDG_CONFIG_HOME/irssi"
   export IRSSI_CONFIG_FILE="$IRSSI_CONFIG_HOME/config"
   x-dc "$IRSSI_CONFIG_HOME"
-fi
+}
 
 # nvm, the node version manager
 export NVM_LAZY_LOAD=true
@@ -76,21 +78,21 @@ export NVM_DIR="$XDG_CONFIG_HOME/nvm"
 [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion
 
 # op (1Password cli) is present
-if hash op 2> /dev/null; then
+have op && {
   export OP_CACHE="$XDG_STATE_HOME/1password"
   x-dc "$OP_CACHE"
   eval "$(op completion zsh)"
   compdef _op op
-fi
+}
 
 # pyenv, python environments
-if command -v pyenv &> /dev/null; then
+have pyenv && {
   export PYENV_ROOT="$XDG_STATE_HOME/pyenv"
   x-dc "$PYENV_ROOT"
-  export PATH="$PYENV_ROOT/bin:$PATH"
+  path_append "$PYENV_ROOT/bin"
 
   eval "$(pyenv init -)"
-fi
+}
 
 # wakatime, https://github.com/wakatime/wakatime-cli
 export WAKATIME_HOME="$XDG_STATE_HOME/wakatime"
@@ -104,4 +106,3 @@ export _Z_DATA="$XDG_STATE_HOME/z"
 export ANDROID_HOME="$XDG_DATA_HOME/android"
 export GNUPGHOME="$XDG_DATA_HOME/gnupg"
 export SCREENRC="$XDG_CONFIG_HOME/misc/screenrc"
-
diff --git a/config/exports-shell b/config/exports-shell
index d749b4f..7b8afc2 100755
--- a/config/exports-shell
+++ b/config/exports-shell
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 # shellcheck shell=bash
 # vim: filetype=zsh
+source "$DOTFILES/scripts/shared.sh"
 
 export LC_ALL=fi_FI.utf8
 
@@ -39,10 +40,7 @@ hash shopt 2> /dev/null && shopt -s checkwinsize
   && source "$XDG_BIN_HOME/iterm2_shell_integration.zsh"
 
 # Set dircolors based on the file, if it exists
-if command -v dircolors &> /dev/null; then
-  # shellcheck disable=SC2046
-  eval $(dircolors "$XDG_CONFIG_HOME/dircolors")
-fi
+have dircolors && eval $(dircolors "$XDG_CONFIG_HOME/dircolors")
 
 # If we are using zsh, color our dir lists and such
 if [ "$SHELL" = "$(which zsh)" ]; then
@@ -52,4 +50,3 @@ if [ "$SHELL" = "$(which zsh)" ]; then
   zstyle ':completion:*' cache-path "$XDG_CACHE_HOME/zsh/zcompcache"
   zstyle ':completion:*' list-colors "$LS_COLORS"
 fi
-
diff --git a/config/functions b/config/functions
index 1f14c1b..f7650f8 100755
--- a/config/functions
+++ b/config/functions
@@ -2,6 +2,8 @@
 #
 # shell functions
 #
+# shellcheck source="../scripts/shared.sh"
+source "$DOTFILES/scripts/shared.sh"
 
 # Weather in Tampere, or other city
 function weather
@@ -66,29 +68,6 @@ function silent
   "$@" >&/dev/null
 }
 
-# Remove directory from the PATH variable
-# usage: path_remove ~/.local/bin
-function path_remove
-{
-  PATH=$(echo -n "$PATH" | awk -v RS=: -v ORS=: "\$0 != \"$1\"" | sed 's/:$//')
-}
-
-# Append directory to the PATH
-# usage: path_append ~/.local/bin
-function path_append
-{
-  path_remove "$1"
-  PATH="${PATH:+"$PATH:"}$1"
-}
-
-# Prepend directory to the PATH
-# usage: path_prepend ~/.local/bin
-function path_prepend
-{
-  path_remove "$1"
-  PATH="$1${PATH:+":$PATH"}"
-}
-
 # Defines default antigen bundles
 function x-default-antigen-bundles
 {
@@ -104,13 +83,13 @@ function x-default-antigen-bundles
   antigen bundle zsh-users/zsh-syntax-highlighting
 
   # these should be available if there's need
-  hash git 2> /dev/null && antigen bundle git
-  hash brew 2> /dev/null && antigen bundle brew
-  hash docker 2> /dev/null && antigen bundle docker
-  hash docker-compose 2> /dev/null && antigen bundle sroze/docker-compose-zsh-plugin
-  hash jq 2> /dev/null && antigen bundle reegnz/jq-zsh-plugin
-  hash nvm 2> /dev/null && antigen bundle nvm
-  hash php 2> /dev/null && antigen bundle php
-  hash python 2> /dev/null && antigen bundle MichaelAquilina/zsh-autoswitch-virtualenv
-  hash rvm 2> /dev/null && antigen bundle unixorn/rvm-plugin
+  have git && antigen bundle git
+  have brew && antigen bundle brew
+  have docker && antigen bundle docker
+  have docker-compose && antigen bundle sroze/docker-compose-zsh-plugin
+  have jq && antigen bundle reegnz/jq-zsh-plugin
+  have nvm && antigen bundle nvm
+  have php && antigen bundle php
+  have python && antigen bundle MichaelAquilina/zsh-autoswitch-virtualenv
+  have rvm && antigen bundle unixorn/rvm-plugin
 }
diff --git a/local/bin/dfm b/local/bin/dfm
index 8cb2b87..f903172 100755
--- a/local/bin/dfm
+++ b/local/bin/dfm
@@ -125,9 +125,7 @@ function section_brew
     "autoupdate:Setups brew auto-update and runs it immediately"
   )
 
-  if ! command -v brew &> /dev/null; then
-    menu_section "$USAGE_PREFIX" "brew not available on this system"
-  else
+  have brew && {
     case "$1" in
       install)
         brew bundle install --file="$BREWFILE" && msg_yay "Done!"
@@ -151,7 +149,7 @@ function section_brew
         menu_usage "$USAGE_PREFIX" "${MENU[@]}"
         ;;
     esac
-  fi
+  } || menu_section "$USAGE_PREFIX" "brew not available on this system"
 }
 
 function section_dotfiles
@@ -188,13 +186,13 @@ function section_dotfiles
       ln -s $DOTFILES/config/astronvim ~/.config/astronvim
       ln -s $DOTFILES/config/nvim ~/.config/nvim
       msg_ok "Linked nvim and astronvim"
-      hash npm 2> /dev/null && $0 install npm
+      have npm && $0 install npm
       msg_ok "Installed packages"
       msg_done "nvim reset!"
       ;;
     yamlfmt)
       # format yaml files
-      yamlfmt -conf "$DOTFILES/.yamlfmt"
+      have yamlfmt && yamlfmt -conf "$DOTFILES/.yamlfmt" || msg_err "yamlfmt not found"
       ;;
     shfmt)
       # Format shell scripts according to following rules.
diff --git a/scripts/install-composer.sh b/scripts/install-composer.sh
index 146a8c1..1680db0 100755
--- a/scripts/install-composer.sh
+++ b/scripts/install-composer.sh
@@ -1,6 +1,10 @@
-#!/bin/bash
+#!/usr/bin/env bash
+# Install PHP Package Manager Composer
+#
+# shellcheck source="shared.sh"
+source "$HOME/.dotfiles/scripts/shared.sh"
 
-if command -v php &> /dev/null; then
+have php && {
   EXPECTED_CHECKSUM="$(php -r 'copy("https://composer.github.io/installer.sig", "php://stdout");')"
   php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
   ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"
@@ -16,4 +20,4 @@ if command -v php &> /dev/null; then
   rm composer-setup.php
   mv composer.phar ~/.local/bin/composer
   exit $RESULT
-fi
+} || msg_err "PHP Not Available, cannot install composer"
diff --git a/scripts/install-gh-extensions.sh b/scripts/install-gh-extensions.sh
index 9f141b8..d42aebc 100755
--- a/scripts/install-gh-extensions.sh
+++ b/scripts/install-gh-extensions.sh
@@ -4,9 +4,7 @@
 # shellcheck source="shared.sh"
 source "$HOME/.dotfiles/scripts/shared.sh"
 
-if ! command -v gh &> /dev/null; then
-  msg_run "gh (GitHub Client) could not be found, please install it first"
-else
+have gh && {
   extensions=(
     # GitHub CLI extension for generating a report on repository dependencies.
     andyfeller/gh-dependency-report
@@ -41,4 +39,4 @@ else
   done
 
   msg_ok "Done"
-fi
+} || msg_err "gh (GitHub Client) could not be found, please install it first"
diff --git a/scripts/install-go-packages.sh b/scripts/install-go-packages.sh
index d487ab1..6e53299 100755
--- a/scripts/install-go-packages.sh
+++ b/scripts/install-go-packages.sh
@@ -4,9 +4,7 @@
 # shellcheck source=shared.sh
 source "$HOME/.dotfiles/scripts/shared.sh"
 
-if ! command -v go &> /dev/null; then
-  msg "go hasn't been installed yet."
-else
+have go && {
   packages=(
     # sysadmin/scripting utilities, distributed as a single binary
     github.com/skx/sysbox@latest
@@ -28,5 +26,4 @@ else
   done
 
   msg_ok "Done"
-
-fi
+} || msg "go hasn't been installed yet."
diff --git a/scripts/install-npm-packages.sh b/scripts/install-npm-packages.sh
index 8a38aac..e633cd4 100755
--- a/scripts/install-npm-packages.sh
+++ b/scripts/install-npm-packages.sh
@@ -4,9 +4,7 @@
 # shellcheck source=shared.sh
 source "$HOME/.dotfiles/scripts/shared.sh"
 
-if ! command -v npm &> /dev/null; then
-  msg_err "npm could not be found."
-else
+have npm && {
   packages=(
     # This is a tool to check if your files consider your .editorconfig rules.
     "editorconfig-checker"
@@ -35,4 +33,4 @@ else
     npm install -g --no-fund --no-progress --no-timing "$pkg"
     echo ""
   done
-fi
+} || msg_err "npm could not be found."
diff --git a/scripts/install-ntfy.sh b/scripts/install-ntfy.sh
index 6e7d32d..b2f491a 100755
--- a/scripts/install-ntfy.sh
+++ b/scripts/install-ntfy.sh
@@ -1,8 +1,14 @@
-#!/bin/bash
-
+#!/usr/bin/env bash
+#
+# Install ntfy
+#
+# shellcheck source=shared.sh
+source "$HOME/.dotfiles/scripts/shared.sh"
 set -e
 
-if ! command -v ntfy &> /dev/null; then
+have ntfy && {
+  msg "ntfy already installed"
+} || {
   case $(dfm check arch) in
     Linux)
       NTFY_ARCH="linux_$(arch)"
@@ -28,6 +34,4 @@ if ! command -v ntfy &> /dev/null; then
   fi
 
   rm -rf "${NTFY_DEST}" "${NTFY_DEST}.tar.gz"
-else
-  echo "ntfy already installed"
-fi
+}
diff --git a/scripts/install-z.sh b/scripts/install-z.sh
index 8689511..751680d 100755
--- a/scripts/install-z.sh
+++ b/scripts/install-z.sh
@@ -1,4 +1,9 @@
 #!/usr/bin/env bash
+#
+# Install z
+#
+# shellcheck source=shared.sh
+source "$HOME/.dotfiles/scripts/shared.sh"
 
 Z_GIT_PATH="https://github.com/rupa/z.git"
 Z_BIN_PATH="$XDG_BIN_HOME/z"
@@ -6,5 +11,5 @@ Z_BIN_PATH="$XDG_BIN_HOME/z"
 if [ ! -d "$Z_BIN_PATH" ]; then
   git clone "$Z_GIT_PATH" "$Z_BIN_PATH"
 else
-  echo "z ($Z_BIN_PATH/) already installed"
+  msg_done "z ($Z_BIN_PATH/) already installed"
 fi
diff --git a/scripts/shared.sh b/scripts/shared.sh
index 43eb148..d738b9e 100755
--- a/scripts/shared.sh
+++ b/scripts/shared.sh
@@ -171,3 +171,33 @@ function menu_usage()
     menu_item "$CMD" "$DESC"
   done
 }
+
+# shorthand for checking if the system has the bin in path.
+# usage: have php && php -v
+function have
+{
+  command -v "$1" >&/dev/null;
+}
+
+# Remove directory from the PATH variable
+# usage: path_remove ~/.local/bin
+function path_remove
+{
+  PATH=$(echo -n "$PATH" | awk -v RS=: -v ORS=: "\$0 != \"$1\"" | sed 's/:$//')
+}
+
+# Append directory to the PATH
+# usage: path_append ~/.local/bin
+function path_append
+{
+  path_remove "$1"
+  PATH="${PATH:+"$PATH:"}$1"
+}
+
+# Prepend directory to the PATH
+# usage: path_prepend ~/.local/bin
+function path_prepend
+{
+  path_remove "$1"
+  PATH="$1${PATH:+":$PATH"}"
+}