SVN Wrapper Script -- support for standard commit message templates and svn info output

svn.sh

#!/usr/bin/env bash

# A wrapper for SVN. Designed for

# GIt users who need access to command line SVN. Tries to adopt as much information from Git config

# Command Line SVN users who are working with people using TortoiseSVN on Windows

# People who have use build scripts that depend on the outfrom from svn info when they in a Git checkout

shopt -s compat31  # Need fancy fatures

# In case we don'to have a template
defaulttemplate="Subject:
Description:"

# Is SVN actually installed?
if [[ -x /usr/local/bin/svn ]] ; then
  SVN_CMD=/usr/local/bin/svn
elif [[ -x /usr/bin/svn ]] ; then
  SVN_CMD=/usr/bin/svn
else
  echo svn not installed
  exit 1
fi

# Are we in the middle if a Git checkout? If requested let's provide info for a build script
if [[ $1 == "info" ]] && git rev-parse --git-dir > /dev/null 2>&1 ; then
  exec git svn info
fi

#Always prefer the editor setting from Git
[[ -n $(git config --global --get core.editor) ]] &&  export SVN_EDITOR=$(git config --global --get core.editor)

#Did not get an editor from Git, so let's see if SVN has an editor (NB Need to install GNU Sed)
[[ -n $SVN_EDITOR ]] ||
   export SVN_EDITOR=$(gsed -ne '/^[ \t]*\[helpers\]/,/^[ \t]*\[.\+\]/s/[\t ]*editor-cmd[ 	]*=[ \t'\''"]*\([^'\''" \t]\+\).*$/\1/p' ~/.subversion/config)

# if still no editor then use env strings
[[ -z $SVN_EDITOR && -n $VISUAL ]] &&  export SVN_EDITOR=$VISUAL

[[ -z $SVN_EDITOR && -n $EDITOR ]] &&  export SVN_EDITOR=$EDITOR

# Really no editor? Lets hard code one
if [[ -z $SVN_EDITOR ]] ; then
  if [[ -x /usr/local/bin/mvim ]] ; then
    export SVN_EDITOR="mvim -f "
  elif [[ -x /usr/bin/gvim ]] ; then
    export SVN_EDITOR="gvim -f "
  else
    export SVN_EDITOR=vim
  fi
fi

if [[ $1 == 'ci' || $1 == 'commit' ]] ; then

    for i in "$@" ; do
        if [[ $i == "-F" || $i == "--file" || $i == "--message" || $i == "-m" ]] ; then 
            # If we are doing a commit  and been provided with the commit message already?
            $SVN_CMD "$@"
            exit
        fi
    done

    if [[ -z $SVN_EDITOR ]] ; then
      echo Could not find an editor to create a commit message
      exit 1
    fi


    # We need to try an set up a commit template
    shift
    msgfile=/tmp/$$msgfile
    templatefile=/tmp/$$template

    if [[ -n "$(svn propget tsvn:logtemplate)" ]] ; then  # TortoiseSVN template
        svn propget tsvn:logtemplate > $templatefile
    elif  [[ -n "$(git config --global --get commit.template)" ]] ; then #Git Template
        templatefile="$(git config --global --get commit.template)"
    else
        echo $defaulttemplate > $templatefile # use the default
    fi

    cp $templatefile $msgfile

    $SVN_EDITOR $msgfile

    if diff -w $templatefile $msgfile > /dev/null ; then
        # Follow Git convention -- no update to commit msg -> no commit
        echo No commit message -- no commit
    else
        $SVN_CMD commit --file "$msgfile"
    fi

    # Get ride of the working files
    rm $msgfile
    [[ $templatefile == "$(git config --global --get commit.template)" ]] || rm $templatefile

else
    # Check if we have uncommitted changes in the working copy
    if [[ $1 == 'up' || $1 == 'update' ]] && $SVN_CMD status -q | egrep '^M' ; then
        echo 'uncommitted changes. Do you wish to processed with update? [N/y]'
        echo '(use "svn revert -R ." to throw away)'
        read x
        if [[ ! ( $x == 'Y' || $x == 'y')  ]] ; then
           exit 1
        fi
    fi

    $SVN_CMD "$@"
fi