ohmyzsh/tools/install.sh

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#!/bin/sh
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#
# This script should be run via curl:
# sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
# or wget:
# sh -c "$(wget -qO- https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
#
# As an alternative, you can first download the install script and run it afterwards:
# wget https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh
# sh install.sh
#
# Respects these environment variables for tweaking the installation process:
# ZSH - path to the Oh My Zsh repository folder (default: $HOME/.oh-my-zsh)
# REPO - name of the GitHub repo to install from (default: robbyrussell/oh-my-zsh)
# REMOTE - full remote URL of the git repo to install (default: GitHub via HTTPS)
# BRANCH - branch to check out immediately after install (default: master)
# Other options:
# CHSH - set to no tells the installer not to change the default shell (default: yes)
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#
set -e
# Default settings
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ZSH=${ZSH:-~/.oh-my-zsh}
REPO=${REPO:-robbyrussell/oh-my-zsh}
REMOTE=${REMOTE:-https://github.com/${REPO}.git}
BRANCH=${BRANCH:-master}
# Other options
CHSH=${CHSH:-yes}
command_exists() {
command -v "$@" >/dev/null 2>&1
}
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error() {
echo ${RED}"Error: $@"${RESET} >&2
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}
# Set up color sequences
setup_color() {
if command_exists tput; then
ncolors=$(tput colors)
else
ncolors=0
fi
# Only use colors if connected to a terminal that supports them
if [ -t 1 ] && [ $ncolors -ge 8 ]; then
RED="$(tput setaf 1)"
GREEN="$(tput setaf 2)"
YELLOW="$(tput setaf 3)"
BLUE="$(tput setaf 4)"
BOLD="$(tput bold)"
RESET="$(tput sgr0)"
else
RED=$(printf '\033[31m')
GREEN=$(printf '\033[32m')
YELLOW=$(printf '\033[33m')
BLUE=$(printf '\033[34m')
BOLD=$(printf '\033[1m')
RESET=$(printf '\033[m')
fi
}
setup_ohmyzsh() {
# Prevent the cloned repository from having insecure permissions. Failing to do
# so causes compinit() calls to fail with "command not found: compdef" errors
# for users with insecure umasks (e.g., "002", allowing group writability). Note
# that this will be ignored under Cygwin by default, as Windows ACLs take
# precedence over umasks except for filesystems mounted with option "noacl".
umask g-w,o-w
echo "${BLUE}Cloning Oh My Zsh...${RESET}"
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command_exists git || {
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error "git is not installed"
exit 1
}
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if [ "$OSTYPE" = cygwin ] && git --version | grep -q msysgit; then
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error "Windows/MSYS Git is not supported on Cygwin"
error "Make sure the Cygwin git package is installed and is first on the \$PATH"
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exit 1
fi
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git clone --depth=1 --branch "$BRANCH" "$REMOTE" "$ZSH" || {
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error "git clone of oh-my-zsh repo failed"
exit 1
}
}
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setup_zshrc() {
# Keep most recent old .zshrc at .zshrc.pre-oh-my-zsh, and older ones
# with datestamp of installation that moved them aside, so we never actually
# destroy a user's original zshrc
echo "${BLUE}Looking for an existing zsh config...${RESET}"
# Must use this exact name so uninstall.sh can find it
OLD_ZSHRC=~/.zshrc.pre-oh-my-zsh
if [ -f ~/.zshrc ] || [ -h ~/.zshrc ]; then
if [ -e "$OLD_ZSHRC" ]; then
OLD_OLD_ZSHRC="${OLD_ZSHRC}-$(date +%Y-%m-%d_%H-%M-%S)"
if [ -e "$OLD_OLD_ZSHRC" ]; then
error "$OLD_OLD_ZSHRC exists. Can't back up ${OLD_ZSHRC}"
error "re-run the installer again in a couple of seconds"
exit 1
fi
mv "$OLD_ZSHRC" "${OLD_OLD_ZSHRC}"
echo "${YELLOW}Found old ~/.zshrc.pre-oh-my-zsh." \
"${GREEN}Backing up to ${OLD_OLD_ZSHRC}${RESET}"
fi
echo "${YELLOW}Found ~/.zshrc.${RESET} ${GREEN}Backing up to ${OLD_ZSHRC}${RESET}"
mv ~/.zshrc "$OLD_ZSHRC"
fi
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echo "${BLUE}Using the Oh My Zsh template file and adding it to ~/.zshrc.${RESET}"
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cp "$ZSH/templates/zshrc.zsh-template" ~/.zshrc
sed "/^export ZSH=/ c\\
export ZSH=\"$ZSH\"
" ~/.zshrc > ~/.zshrc-omztemp
mv -f ~/.zshrc-omztemp ~/.zshrc
}
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setup_shell() {
# Skip setup if the user wants or stdin is closed (not running interactively).
if [ $CHSH = no ] || ! [ -t 0 ]; then
return
fi
# If this user's login shell is already "zsh", do not attempt to switch.
if [ "$(basename "$SHELL")" = "zsh" ]; then
return
fi
# If this platform doesn't provide a "chsh" command, bail out.
if ! command_exists chsh; then
cat <<-EOF
I can't change your shell automatically because this system does not have chsh.
${BLUE}Please manually change your default shell to zsh${RESET}
EOF
return
fi
echo "${BLUE}Time to change your default shell to zsh!${RESET}"
# Test for the right location of the "shells" file
if [ -f /etc/shells ]; then
shells_file=/etc/shells
elif [ -f /usr/share/defaults/etc/shells ]; then # Solus OS
shells_file=/usr/share/defaults/etc/shells
else
error "could not find /etc/shells file. Change your default shell manually."
return
fi
# Get the path to the right zsh binary
# 1. Use the most preceding one based on $PATH, then check that it's in the shells file
# 2. If that fails, get a zsh path from the shells file, then check it actually exists
if ! zsh=$(which zsh) || ! grep -qx "$zsh" "$shells_file"; then
if ! zsh=$(grep '^/.*/zsh$' "$shells_file" | tail -1) || [ ! -f "$zsh" ]; then
error "no available zsh binary found. Change your default shell manually."
return
fi
fi
# Actually change the default shell to zsh
if ! chsh -s "$zsh"; then
error "chsh command unsuccessful. Change your default shell manually."
fi
}
main() {
# Parse arguments
while [ $# -gt 0 ]; do
case $1 in
--skip-chsh) CHSH=no ;;
esac
shift
done
setup_color
if ! command_exists zsh; then
echo "${YELLOW}Zsh is not installed.${RESET} Please install zsh first."
exit 1
fi
if [ -d "$ZSH" ]; then
cat <<-EOF
${YELLOW}You already have Oh My Zsh installed.${RESET}
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You'll need to remove '$ZSH' if you want to reinstall.
EOF
exit 1
fi
setup_ohmyzsh
setup_zshrc
setup_shell
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printf "$GREEN"
cat <<-'EOF'
__ __
____ / /_ ____ ___ __ __ ____ _____/ /_
/ __ \/ __ \ / __ `__ \/ / / / /_ / / ___/ __ \
/ /_/ / / / / / / / / / / /_/ / / /_(__ ) / / /
\____/_/ /_/ /_/ /_/ /_/\__, / /___/____/_/ /_/
/____/ ....is now installed!
Please look over the ~/.zshrc file to select plugins, themes, and options.
p.s. Follow us on https://twitter.com/ohmyzsh
p.p.s. Get stickers, shirts, and coffee mugs at https://shop.planetargon.com/collections/oh-my-zsh
EOF
printf "$RESET"
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if [ ! -t 0 ]; then
echo "${YELLOW}Run zsh to try it out.${RESET}"
exit
fi
exec zsh -l
}
main "$@"