[tz] technical details for today's code and data release

[Paul Eggert]

# This email documents how I built today's tzcode and tzdata release.
# It mostly uses POSIX shell syntax (hence the leading '#' here).
# The idea is to document what I did this time, so that more of
# this stuff can be done better and/or automated next time.

# Here's how I built the release, on Ubuntu 12.04 x86,
# starting from the unofficial public repository.
git clone -n https://github.com/eggert/tz.git
(cd tz
 git checkout ee42236d5192a0199bbac05385fe2f613b1b30e2
 make check
 make public
)

# Here's how I imported the release into the private IANA repository.
# This procedure makes sense only if one has access to this repository,
# which is not currently public.
(cd tz-iana
 cp ../tz/tzcode2012c.tar.gz ../tz/tzdata2012d.tar.gz releases
 ln -sf releases/tzcode2012c.tar.gz tzcode-latest.tar.gz
 ln -sf releases/tzdata2012d.tar.gz tzdata-latest.tar.gz
 (cd data && tar xf ../tzdata-latest.tar.gz)
 (cd code && tar xf ../tzcode-latest.tar.gz)
 git add releases/tzcode2012c.tar.gz releases/tzdata2012d.tar.gz
 git commit -am'tzcode2012c and tzdata2012d'

 # Oops, forgot to update '.latest'.  Do that now.
 (echo 'data tzdata2012d.tar.gz 2012-07-20'
  echo 'code tzcode2012c.tar.gz 2012-07-20'
 ) >.latest
 git commit -am'tzcode2012c and tzdata2012d in .latest.'
)

# Here's how I created the signatures for the distributions.
(cd tz
 gpg --detach-sign --armor -o tzcode2012c.tar.gz.sign tzcode2012c.tar.gz
 gpg --detach-sign --armor -o tzdata2012d.tar.gz.sign tzdata2012d.tar.gz
)

# Here are the signatures themselves, generated by:
(cd tz; more tzcode2012c.tar.gz.sign tzdata2012d.tar.gz.sign)
::::::::::::::
tzcode2012c.tar.gz.sign
::::::::::::::
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)

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=Dfi2
-----END PGP SIGNATURE-----
::::::::::::::
tzdata2012d.tar.gz.sign
::::::::::::::
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)

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/hlBK83rp7vwQj2Sk9NU8tzyv1paGOcM8Ps/aL5gsZpkF48v2GQ0kDrZwazTgODD
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0PJmnu0eg3TKYTE6/vX8
=eKib
-----END PGP SIGNATURE-----