git-zip

#!/bin/bash
# git-zip: Zip up a git tree.
# Copyright (c) 2015 Chris White.  CC-BY-SA 3.0

if [ $# -lt 1 ]; then
  cat <<EOF
Usage: git-zip <path to repo> [zip file name]
E.g., git-zip fooproject fooproject.7z
The default zip file name is the path name with the date tacked on.
EOF
  exit
fi

if [ \! \( -d "$1" -a -r "$1" -a -x "$1" \) ]; then
  echo "I can't read from directory \"$1\"">/dev/stderr
  exit 1
fi

# Find out if there's a git repo there.
# Thanks to http://stackoverflow.com/a/2185353/2877364 by
# http://stackoverflow.com/users/140750/william-pursell

pushd "$1" &>/dev/null
if ! $(git rev-parse --git-dir &>/dev/null) ; then
  echo "I can't find a git repo in \"$1\"">/dev/stderr
  exit 2
fi
popd &>/dev/null

base=$(basename "${1%.git}")  # %.git strips the .git extension, if any
if [ $# -lt 2 ]; then
  zipname="$base-$(date "+%F-%H%M%S")".7z
else
  zipname="${2%.7z}.7z" # always 7z
fi

echo Archiving "$1" into "$zipname"

destfn=$(realpath "$zipname") # grab the absolute path

baretree=`mktemp -d`
barerepo=".git"   # So it's ready to import back into a working directory
destdir="$baretree/$barerepo"
  # Put the .git inside the mktemp directory so the name of the mktemp dir
  # won't be in the 7z archive

# Thanks to http://gitready.com/intermediate/2009/01/24/sharing-your-changes.html
git clone --bare "$1" "$destdir"
pushd "$baretree" &>/dev/null
cat <<EOF >00README.txt
To use this, unzip into your working directory and then run
  git init
  git checkout -f
Thanks to
  http://gitready.com/intermediate/2009/01/24/sharing-your-changes.html
for this tip!
EOF
7z a "$destfn" 00README.txt "$barerepo"
popd &>/dev/null

rm -rf "$baretree"
echo Done archiving into "$destfn"

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