shell: have, path_(append|prepend|remove)

- have: command -v shorthand
- path_append: appends dir to PATH
- path_prepend: prepends dir to PATH
- path_remove: removes dir from PATH

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

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"

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"
-

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
-

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
 }