repoclone

#!/bin/bash
#
# repoclone
# version 0.2
# 
# Clones a local Android repo to another local Android repo, with native git clone object hardlinks to conserve storage.
#
# Copyright 2012 Warren Togami <wtogami@gmail.com>
# Licensed under the GNU GPL v3+.

errorexit() {
  echo "ERROR: You must invoke this command with two parameters."
  echo
  echo "    $0 <fromrepo> <torepo>"
  echo
  echo "      * <fromrepo> must be in the current directory."
  echo "      * <torepo> must be in the current directory, but you can move it later."
  echo "      * <torepo> MUST NOT EXIST."
  echo "      * Neither names should have a trailing slash."
  exit 255
}

# Sanity Checks
# TODO: Make this more flexible in dealing with relative or full pathnames
[ -z "$1" ] || [ -z "$2" ] && errorexit
[ "$1" != $(basename $1) ] || [ "$2" != $(basename $2) ] && errorexit
[ -e "$2" ] && echo "ERROR: $2 already exists." && exit 255

# Abort immediately if any error occurs
set -e

# Copy directory structure without .git directories
echo "### Copy directory structure without .git directories ###"
echo mkdir $2/
echo rsync -a -f"+ */" -f"- *" $1/.repo/ $2/.repo/
mkdir $2/
rsync -a -f"+ */" -f"- *" $1/.repo/ $2/.repo/

# Copy .repo without pack/ directories
echo "### Copy .repo without pack/ directories ###"
echo rsync -a -f"- pack/" $1/.repo/ $2/.repo/
rsync -a -f"- pack/" $1/.repo/ $2/.repo/

# Hardlink copy git pack/ objects
echo "### Hardlink copy git pack/ objects ###"
for packdir in $(find $1/.repo/ -type d -name pack); do
  targetdir=$(echo $packdir |sed "s/^$1/$2/;s/pack$//")
  echo cp -al $packdir $targetdir
  cp -al $packdir $targetdir
done

# Done
echo
echo "Done cloning $1 to $2!"
echo
echo "Suggested Next Steps"
echo "===================="    
echo "    cd $2"
echo "    repo init -b ics"
echo "        # Switch to a different branch."
echo "        # You should first adjust your .repo/local_manifest.xml"
echo "    repo sync"
echo "        # Restore checkout of working directories from .repo"
echo