Add Zsh config files

Prior to this change, I was using Bash as the default shell, but I have
now started using Zsh, which has more features.

This change adds the zshrc and related plugin files to source control
and installs them along with the bashrc files. This also updates tmux to
use zsh as the default shell and command.

install

@@ -227,3 +227,14 @@ then
     echo "    source ~/.bashrc.common"
 fi
 
+#######################################################################
+# Install zsh files
+#######################################################################
+lnfile zshrc ~/.zshrc
+mkfolder ~/.zshrc.d
+mkfolder ~/.zshrc.d/functions
+for plugin in zsh/*.zsh
+do
+    lnfile $plugin ~/.zshrc.d/
+done
+

tmux.conf

@@ -23,9 +23,9 @@ set-option -g mouse on
 set-option -g history-limit 100000
 
 # Default settings
-set-option -g default-command "/bin/bash"
+set-option -g default-command "/bin/zsh"
 #set-option -g default-path "~"
-set-option -g default-shell "/bin/bash"
+set-option -g default-shell "/bin/zsh"
 
 # Display timeout
 set-option -g display-time 1500

zsh/aliases.zsh

@@ -0,0 +1,26 @@
+#######################################################################
+# Aliases
+#######################################################################
+# Common aliases across systems
+# ls aliases
+alias ls='ls --color=auto'
+alias ll='ls -l'
+
+# Git aliases
+alias tgp='time git pull'
+alias gf='git fetch'
+
+# Tmux aliases
+# Attach to an existing tmux session
+alias work='TERM=screen-256color-bce tmux -2 -u attach -d'
+# Use this to launch in 256-color mode
+alias tmux='TERM=screen-256color-bce tmux -2 -u'
+# Trigger tmux to reopen the socket if it cannot attach
+alias kick='pkill -USR1 -u $USER tmux'
+
+# Keep system specific aliases in a seperate file called .aliases
+# If .aliases exists it will envoked by the next line:
+if [[ -f $HOME/.aliases ]]
+then
+    source $HOME/.aliases 
+fi

zsh/completion.zsh

@@ -0,0 +1,7 @@
+#######################################################################
+# ZSH Completion
+#######################################################################
+zstyle :compinstall filename '/home/nkrishnan/.zshrc'
+
+autoload -Uz compinit
+compinit

zsh/editing.zsh

@@ -0,0 +1,17 @@
+#######################################################################
+# Key Bindings
+#######################################################################
+# Use emacs bindings by default
+bindkey -e
+
+#######################################################################
+# Default Editor and line editing
+#######################################################################
+export EDITOR=vim
+
+# Emacs style bindings
+autoload -U edit-command-line
+zle -N edit-command-line
+bindkey '^xe' edit-command-line
+bindkey '^x^e' edit-command-line
+

zsh/gpg.zsh

@@ -0,0 +1,3 @@
+gpgconf --launch gpg-agent
+
+export SSH_AUTH_SOCK="$HOME/.gnupg/S.gpg-agent.ssh"

zsh/history.zsh

@@ -0,0 +1,7 @@
+#######################################################################
+# History configuration
+#######################################################################
+HISTFILE=~/.histfile
+HISTSIZE=1000
+SAVEHIST=1000
+setopt appendhistory

zsh/lscolors.zsh

@@ -0,0 +1,59 @@
+# Add ls coloring
+# Don't bother setting LS_COLORS if it's alredy set
+if [[ -n "$LS_COLORS" ]]
+then
+    return
+fi
+
+if [[ "`uname`" == *"Darwin"* ]]
+then
+    # OS X uses BSD ls which is relatively restricted compared to
+    # GNU ls as far as coloring options go. Stick to the basics here.
+    # LSCOLORS is in pairs (fgcolor, bgcolor)
+
+    # Colorscheme for LSCOLORS (BSD)
+    # a => black    A => dark gray
+    # b => red      B => bold red
+    # c => green    C => bold green
+    # d => brown    D => yellow
+    # e => blue     E => bold blue
+    # f => magenta  F => bold magenta
+    # g => cyan     G => bold cyan
+    # h => gray     H => white
+    # x => default
+
+    # Ordering for LSCOLORS(BSD)
+    # 1. directory
+    # 2. symbolic link
+    # 3. socket
+    # 4. pipe
+    # 5. executable
+    # 6. block device
+    # 7. character device
+    # 8. executable with setuid set
+    # 9. executable with setguid set
+    # 10. directory writable by others, with sticky bit
+    # 11. directory writable by others, without sticky bit
+
+    export LSCOLORS="ExGxbxdxCxegedabagacad"
+
+    # Must use either CLICOLOR=1 or ls -G
+    export CLICOLOR=1
+fi
+
+DCFILE="$HOME/.dircolors"
+
+# We can presume we are on a GNU system, or at the very least,
+# a system which has the GNU coreutils installed
+if [[ -f $DCFILE ]] && [[ -s $DCFILE ]]
+then
+    if [[ ! -z `which dircolors` ]]
+    then
+        eval `dircolors $DCFILE`
+    elif [[ ! -z `which gdircolors` ]]
+    then
+        # OS X with coreutils installed from MacPorts will have
+        # dircolors installed by default as gdircolors.
+        eval `gdircolors $DCFILE`
+    fi
+fi

zsh/prompt.zsh

@@ -0,0 +1,42 @@
+#######################################################################
+# Git prompt functionality
+#######################################################################
+# Define a default __git_ps1 in case we don't have git prompt functionality
+function __git_ps1
+{
+    :
+}
+
+# Import the Git prompt shell functions. These can be found
+# @github:git/git/contrib/completion/git_prompt.sh
+if [ -f $HOME/.git_prompt.sh ]; then
+    source $HOME/.git_prompt.sh
+fi
+
+# Prompt header function, prints user, hostname and current directory
+function prompt_header
+{
+    # Build the prompt prefix
+    local prefix
+    # Add the current date in YYYY-MM-DD HH:MM:SS format (yellow color)
+    prefix='%F{yellow}%D{%F %T}%f' 
+    # Add <user>@<hostname> (blue color)
+    prefix="$prefix %F{blue}%n@%m%f"
+    # Add current working directory (green color)
+    # This replaces the smartwd functionality with zsh conditionals
+    prefix="$prefix [%F{green}%(6~#%-3~/.../%2~#%~)%f]"
+    # Add the status of the last command, but only if it failed
+    prefix="$prefix %(?..%F{red}!! %? !!%f)"
+
+    # Configuration for __git_ps1
+    GIT_PS1_SHOWCOLORHINTS=yes
+    GIT_PS1_SHOWDIRTYSTATE=yes
+    GIT_PS1_SHOWUNTRACKEDFILES=yes
+    GIT_PS1_SHOWUPSTREAM=verbose
+    __git_ps1 $'\n'$prefix$'\n' '%# ' '(%s)'
+}
+
+if [[ ! -z $TERM && "$TERM" != "dumb" ]]
+then
+    add-zsh-hook precmd 'prompt_header'
+fi

zshrc

@@ -0,0 +1,28 @@
+#######################################################################
+# Add path entries
+#######################################################################
+function add_to_path {
+    if [[ ! ${path[(r)$1]} == $1 ]]
+    then
+        path=($1 $path)
+    fi
+}
+
+add_to_path $HOME/bin
+
+#######################################################################
+# Plugins
+#######################################################################
+autoload -U add-zsh-hook
+fpath+="$HOME/.zshrc.d/functions"
+
+setopt nullglob
+for plugin in $HOME/.zshrc.d/*.zsh
+do
+    source $plugin
+done
+setopt nonullglob
+
+
+# Additional options
+setopt autocd extendedglob nomatch notify