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FAQ
Folks,

I noticed that src/tools/copyright looks like it can only be run on
Bruce's machine, so this translation to Perl is intended:

1. To make the script idempotent, which allows its safe use in
automated tools that might run it many times.

2. To get the script to run on any machine a PostgreSQL developer
would be using, as Perl is already required.

3. To make the script more efficient. As the copyright notice we
need to munge only appears once per file, it stops once it has made a
substitution.

Please find attached a patch implementing same.

Cheers,
David.
--
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Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: [email protected]
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  • Bruce Momjian at Aug 19, 2011 at 5:52 pm ⇧

    David Fetter wrote:
    Folks,

    I noticed that src/tools/copyright looks like it can only be run on
    Bruce's machine, so this translation to Perl is intended:

    1. To make the script idempotent, which allows its safe use in
    automated tools that might run it many times.

    2. To get the script to run on any machine a PostgreSQL developer
    would be using, as Perl is already required.

    3. To make the script more efficient. As the copyright notice we
    need to munge only appears once per file, it stops once it has made a
    substitution.

    Please find attached a patch implementing same.
    Thanks. Applied to HEAD. I never liked putting scripts in git that
    only I could run, but I thought if something happened to me, it would be
    good to record what I did. The Perl solution is perfect.

    --
    Bruce Momjian <[email protected]> http://momjian.us
    EnterpriseDB http://enterprisedb.com

    + It's impossible for everything to be true. +
  • Kris Jurka at Aug 19, 2011 at 8:50 pm ⇧

    On 8/19/2011 10:51 AM, Bruce Momjian wrote:
    David Fetter wrote:
    [Here's a new copyright program.]
    Thanks. Applied to HEAD. I never liked putting scripts in git that
    only I could run, but I thought if something happened to me, it would be
    good to record what I did. The Perl solution is perfect.
    For me this fails with:

    Bareword "Tie::File" not allowed while "strict subs" in use at
    /home/jurka/pg/server/postgresql/src/tools/copyright.pl line 28.

    Using perl -v:
    This is perl 5, version 12, subversion 3 (v5.12.3) built for
    x86_64-linux-gnu-thread-multi

    Additionally it would be nice if this file was marked executable in git.

    Kris Jurka
  • Kris Jurka at Aug 19, 2011 at 9:34 pm ⇧

  • David Fetter at Aug 19, 2011 at 9:37 pm ⇧

    On Fri, Aug 19, 2011 at 05:34:01PM -0400, Kris Jurka wrote:
    On Fri, 19 Aug 2011, Kris Jurka wrote:

    For me this fails with:

    Bareword "Tie::File" not allowed while "strict subs" in use at
    /home/jurka/pg/server/postgresql/src/tools/copyright.pl line 28.
    This fixes things for me. The copyright matching wasn't working for me
    either without escaping the parentheses.
    Thanks for fixing this :)

    Cheers,
    David.
    --
    David Fetter <[email protected]> http://fetter.org/
    Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
    Skype: davidfetter XMPP: [email protected]
    iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics

    Remember to vote!
    Consider donating to Postgres: http://www.postgresql.org/about/donate
  • Bruce Momjian at Aug 19, 2011 at 9:48 pm ⇧

    Kris Jurka wrote:

    On Fri, 19 Aug 2011, Kris Jurka wrote:

    For me this fails with:

    Bareword "Tie::File" not allowed while "strict subs" in use at
    /home/jurka/pg/server/postgresql/src/tools/copyright.pl line 28.
    This fixes things for me. The copyright matching wasn't working for me
    either without escaping the parentheses.
    Was able to reproduce the error you reported with Perl 5.10. I then
    tried the single-quote idea I got from Googling, but then got an error
    about TIEARRAY being missing, so I recoded it as a simple file
    open/close. I also incorported your regex fix. Path attached and
    applied. Thanks.

    --
    Bruce Momjian <[email protected]> http://momjian.us
    EnterpriseDB http://enterprisedb.com

    + It's impossible for everything to be true. +
  • Kris Jurka at Aug 19, 2011 at 9:57 pm ⇧

    On Fri, 19 Aug 2011, Bruce Momjian wrote:

    Was able to reproduce the error you reported with Perl 5.10. I then
    tried the single-quote idea I got from Googling, but then got an error
    about TIEARRAY being missing, so I recoded it as a simple file
    open/close. I also incorported your regex fix. Path attached and
    applied. Thanks.
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.

    Kris Jurka
  • Bruce Momjian at Aug 19, 2011 at 11:32 pm ⇧

    Kris Jurka wrote:

    On Fri, 19 Aug 2011, Bruce Momjian wrote:

    Was able to reproduce the error you reported with Perl 5.10. I then
    tried the single-quote idea I got from Googling, but then got an error
    about TIEARRAY being missing, so I recoded it as a simple file
    open/close. I also incorported your regex fix. Path attached and
    applied. Thanks.
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.

    --
    Bruce Momjian <[email protected]> http://momjian.us
    EnterpriseDB http://enterprisedb.com

    + It's impossible for everything to be true. +
  • Andrew Dunstan at Aug 19, 2011 at 11:37 pm ⇧

    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should point
    out that Tie::File is not universally available. Some years ago I had to
    revert its use in the buildfarm code for that reason. In general we
    should try to avoid adding extra dependencies wherever possible.

    cheers

    andrew
  • Bruce Momjian at Aug 19, 2011 at 11:41 pm ⇧

    Andrew Dunstan wrote:

    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should point
    out that Tie::File is not universally available. Some years ago I had to
    revert its use in the buildfarm code for that reason. In general we
    should try to avoid adding extra dependencies wherever possible.
    Oh, great. :-(

    I can easily change this to rewrite files that contain copyright changes
    --- should I?

    --
    Bruce Momjian <[email protected]> http://momjian.us
    EnterpriseDB http://enterprisedb.com

    + It's impossible for everything to be true. +
  • Kris Jurka at Aug 19, 2011 at 11:44 pm ⇧

    On Fri, 19 Aug 2011, Bruce Momjian wrote:

    Andrew Dunstan wrote:
    It probably doesn't matter that much in this context, but I should point
    out that Tie::File is not universally available. Some years ago I had to
    revert its use in the buildfarm code for that reason. In general we
    should try to avoid adding extra dependencies wherever possible.

    I can easily change this to rewrite files that contain copyright changes
    --- should I?
    No. We don't need a super portable copyright year changing script.

    Kris Jurka
  • David Fetter at Aug 20, 2011 at 1:02 am ⇧

    On Fri, Aug 19, 2011 at 07:37:29PM -0400, Andrew Dunstan wrote:

    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should
    point out that Tie::File is not universally available. Some years
    ago I had to revert its use in the buildfarm code for that reason.
    In general we should try to avoid adding extra dependencies wherever
    possible.
    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.

    Cheers,
    David.
    --
    David Fetter <[email protected]> http://fetter.org/
    Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
    Skype: davidfetter XMPP: [email protected]
    iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics

    Remember to vote!
    Consider donating to Postgres: http://www.postgresql.org/about/donate
  • Andrew Dunstan at Aug 20, 2011 at 1:22 am ⇧

    On 08/19/2011 09:02 PM, David Fetter wrote:
    On Fri, Aug 19, 2011 at 07:37:29PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should
    point out that Tie::File is not universally available. Some years
    ago I had to revert its use in the buildfarm code for that reason.
    In general we should try to avoid adding extra dependencies wherever
    possible.
    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.


    Which are those?

    cheers

    andrew
  • David Fetter at Aug 20, 2011 at 1:39 am ⇧

    On Fri, Aug 19, 2011 at 09:22:03PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 09:02 PM, David Fetter wrote:
    On Fri, Aug 19, 2011 at 07:37:29PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should
    point out that Tie::File is not universally available. Some years
    ago I had to revert its use in the buildfarm code for that reason.
    In general we should try to avoid adding extra dependencies
    wherever possible.
    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.
    Which are those?
    5.12 and 5.14 are still supported. 5.10 and earlier are EOL.

    http://news.perlfoundation.org/2011/05/perl-514.html

    Cheers,
    David.
    --
    David Fetter <[email protected]> http://fetter.org/
    Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
    Skype: davidfetter XMPP: [email protected]
    iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics

    Remember to vote!
    Consider donating to Postgres: http://www.postgresql.org/about/donate
  • Bruce Momjian at Aug 20, 2011 at 1:49 am ⇧

    David Fetter wrote:
    On Fri, Aug 19, 2011 at 09:22:03PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 09:02 PM, David Fetter wrote:
    On Fri, Aug 19, 2011 at 07:37:29PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should
    point out that Tie::File is not universally available. Some years
    ago I had to revert its use in the buildfarm code for that reason.
    In general we should try to avoid adding extra dependencies
    wherever possible.
    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.
    Which are those?
    5.12 and 5.14 are still supported. 5.10 and earlier are EOL.

    http://news.perlfoundation.org/2011/05/perl-514.html
    Odd the Tie works in my Perl 5.10; I wonder if I installed it somehow.

    --
    Bruce Momjian <[email protected]> http://momjian.us
    EnterpriseDB http://enterprisedb.com

    + It's impossible for everything to be true. +
  • David Fetter at Aug 20, 2011 at 2:14 am ⇧

    On Fri, Aug 19, 2011 at 09:49:35PM -0400, Bruce Momjian wrote:
    David Fetter wrote:
    On Fri, Aug 19, 2011 at 09:22:03PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 09:02 PM, David Fetter wrote:
    On Fri, Aug 19, 2011 at 07:37:29PM -0400, Andrew Dunstan wrote:
    On 08/19/2011 07:31 PM, Bruce Momjian wrote:
    Kris Jurka wrote:
    Did you also try the "use Tie::File" addition in my fix because your
    current coding doesn't work at all. The tie operation is key to actually
    writing out the modified copyright notice. Your version just updates the
    copyright year in memory, but never gets it back to the file.
    Ah, that did fix it; thanks. I am attached the updated committed
    copyright.pl. I also skipped symlinks.
    It probably doesn't matter that much in this context, but I should
    point out that Tie::File is not universally available. Some years
    ago I had to revert its use in the buildfarm code for that reason.
    In general we should try to avoid adding extra dependencies
    wherever possible.
    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.
    Which are those?
    5.12 and 5.14 are still supported. 5.10 and earlier are EOL.

    http://news.perlfoundation.org/2011/05/perl-514.html
    Odd the Tie works in my Perl 5.10; I wonder if I installed it somehow.
    Sorry for being unclear. I didn't mean to imply that earlier versions
    of Perl didn't ship with File::Tie. Just that all supported versions
    do.

    Cheers,
    David.
    --
    David Fetter <[email protected]> http://fetter.org/
    Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
    Skype: davidfetter XMPP: [email protected]
    iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics

    Remember to vote!
    Consider donating to Postgres: http://www.postgresql.org/about/donate
  • Andrew Dunstan at Aug 20, 2011 at 2:07 am ⇧

    On 08/19/2011 09:39 PM, David Fetter wrote:

    Tie::File ships as part of core Perl for all non-EOL versions, so I
    really can't consider this as a problem.
    Which are those?
    5.12 and 5.14 are still supported. 5.10 and earlier are EOL.

    http://news.perlfoundation.org/2011/05/perl-514.html
    Well, they need to get their story straight.
    <http://www.cpan.org/src/README.html> says:

    Please note that branches earlier than 5.8 are no longer supported,
    though fixes for urgent issues, for example severe security
    problems, may still be issued.

    What is more, ignoring 5.10 and older would simply foolish. Those
    versions are live on many of the platforms we build Postgres on, and in
    quite modern distributions too, for example in RHEL 6.

    Anyway, they point seems moot in this context.

    cheers

    andrew

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