I'm used to how svn export works, and have used this in a number of release scripts.
Git doesn't quite have an equivalent
There is
git archive
Which creates a tarball rather than a set of files, and while you can export a subset of the repository you still get the full path in the tarball.
and
git checkout-index
Which creates a set of files (these can be locate outside the working copy) but requires a local repository.
Also I'm using github which doesn't support the remote repository option of git archive and thereadymade tarball doesn't seem to work via wget on a private project.
What I really wanted was a script I could hand to the sysadmin, that he could run on any server without needing a local git repository.
In the end I have instead written a script that packages the tarball I want and uploads that to a server he can access it from.
<?php
#!/bin/bash -ex
# pass a valid release tag as a parameter to this script to create an release tarball and upload to skunkworks
# this works on the local git repo - which must be up to date!
git archive $1 www > /tmp/${1}.tar
cd /tmp
tar -xf ${1}.tar
rm ${1}.tar
rm -Rf www/sites/default/
mv www $1
tar -czf ${1}.tar.gz $1
rm -Rf $1
scp ${1}.tar.gz dev.server.foo:/var/www/releases
?>Then there is another script that downloads and unpacks this to upgrade our site.
<?php
#!/bin/bash -ex
# parameter is release tag
# tag has been released and uploaded to skunkworks
# live site is backed up
# live site docroot is /var/www/public_html
# each release is at /var/www/$release
# symlink points /var/www/public_html to current release
# sites/default is common to every release - stored as /var/www/sites-default
# symlink added to each release to point to this
export COLUMNS=80
release=$1
cd /var/www/
wget http://dev.server.foo/releases/${release}.tar.gz
tar -xzf ${release}.tar.gz
cd ${release}
ln -s /var/www/sites-default sites/default
drush -y vset site_offline_message "<p>Site offline for upgrade</p>"
drush -y vset site_offline 1
drush -y updb
drush cc all
# if the current user is a member of the www-data or apache group we can make the files owned by this group
# as long as apache has umask 002 files should now be writable by us and apache
groups | grep www-data > /dev/null && find sites/default/files/ ! -group www-data -exec chgrp www-data {} ;
groups | grep apache > /dev/null && find sites/default/files/ ! -group apache -exec chgrp apache {} ;
cd ..
rm public_html
ln -s ${release} public_html
cd ${release}
drush -y --uri=www.defaqto.com vset site_offline 0
?>
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