svn_gvimdiff

#!/bin/bash

vim_path="/usr/bin/vim"
epoch_time="$(date +%s)"
vim_servername=""
servername_file=diffserver.txt

# First time to create diffserver txt 
if [ ! -f "$servername_file" ]; then \
    vim_servername="DIFFSERVER"$epoch_time""
    touch "$servername_file"
    echo "$vim_servername" > "$servername_file"
fi 

# Retrieve server name
if [ -f "$servername_file" ]; then \
    vim_servername=$(cat "$servername_file")
fi

# Create a new vim server
if [ "$(/usr/bin/gvim --serverlist | grep -i "^$vim_servername\$" | wc -l )" -lt 1 ]; then \
      # my /usr/bin/vim is vim 7.4 and /usr/local/bin/vim is vim 8.0
      # change the path to your gvim or vim   
      "$vim_path" "--servername $vim_servername"
fi

use_this_servername="/usr/bin/gvim --servername $vim_servername" 

# SVN variables of interest 
# echo "{\$3} = ${3}" # [folder]/[file]  (revision [base rev number])
# echo "{\$5} = ${5}" # [folder]/[file]  (working copy) 
# echo "{\$6} = ${6}" # [folder]/.svn/text-base/[file].svn-base
# echo "{\$7} = ${7}" # [folder]/[file]

# Print information
echo "Diff ${7} in a tab." 
echo "  IS FILE  (right split) = ${7}" 
echo "  WAS FILE (left split) = ${6}"
echo "  DIFF HTML = $PWD/$(basename ${7}).diff.html"

# open IS file in a new tab 
$use_this_servername --remote-send ":tabe ${7} <CR>" 

# open WAS file via vertical split in current tab, and diff these two files in tab  
$use_this_servername --remote-send ":vert diffsplit ${6} <CR>" 

# convert diffsplit into HTML 
$use_this_servername --remote-send ":TOhtml <CR>" 

# save diff.html output 
$use_this_servername --remote-send ":saveas! ./$(basename ${7}).diff.html <CR>"

# quit diff.html split window 
$use_this_servername --remote-send ":q <CR>"

echo ""
echo "Remove $servername_file to open in a new gvim session"
echo "      In terminal, rm -rf $servername_file" 
echo "Otherwise, diff will open in current [Mac |g]vim session $vim_servername"
echo ""