3 ms·

Wait, what? How could someone reconstruct single commits? There was no Git back then! The patch program is quite old (1985), but those patches go back to 1972.

pjc50 11y ago
https://en.wikipedia.org/wiki/Source_Code_Control_System https://en.wikipedia.org/wiki/Source_Code_Control_System dates from 1972. The evolution appears to have been SCCS -> RCS -> CVS -> svn|hg|bzr|git (cambrian explosion) -> git (mass extinction).
- davidgerard 11y ago
  I'd place the explosion around the time of CVS - but that was an explosion of proprietary VCSes. They didn't have to be as good as git, they just had to be better than CVS.
  - pjc50 11y ago
    Mm, although I felt that Rational Clearcase, MVS, and Visual Sourcesafe were mostly worse than CVS.
    - pjmlp 11y ago
      Given my experience on the enterprise, you can still use the present form. Although I do like gated checkins in TFS without having to roll our own solutions.
ajross 11y ago
SCCS was contemporary with early unix development, so certainly it's technically possible that there are revision histories going back that far. But I'd have to believe that the early commits in this repo are just release checkpoints. It looks like the most recent stuff (1994) dates from early proto-FreeBSD work.
autoreleasepool 11y ago
Here's the first "synthetic commit" from June 20, 1972 https://github.com/dspinellis/unix-history-repo/commit/6717481c358b484385b4f5d5b95205e2a924a2c7 https://github.com/dspinellis/unix-history-repo/commit/67174...
- a_bonobo 11y ago
  The accompanying publication explains it more: http://www.dmst.aueb.gr/dds/pubs/conf/2015-MSR-Unix-History/html/Spi15c.pdf http://www.dmst.aueb.gr/dds/pubs/conf/2015-MSR-Unix-History/... >Curating and processing available snapshots as well as old and modern configuration management repositories allows the reconstruction of a new synthetic Git repository that combines under a single roof most of the available data
- bitcointicker 11y ago
  Last page starts here: https://github.com/dspinellis/unix-history-repo/commits/master?page=3951 https://github.com/dspinellis/unix-history-repo/commits/mast... Fascinating!
cyphar 11y ago
Because Git wasn't the first version control system. Nor was it the first bringover-modify-merge model of distributed source control.

pjc50 11y ago

https://en.wikipedia.org/wiki/Source_Code_Control_System https://en.wikipedia.org/wiki/Source_Code_Control_System dates from 1972. The evolution appears to have been SCCS -> RCS -> CVS -> svn|hg|bzr|git (cambrian explosion) -> git (mass extinction).

davidgerard 11y ago
I'd place the explosion around the time of CVS - but that was an explosion of proprietary VCSes. They didn't have to be as good as git, they just had to be better than CVS.
- pjc50 11y ago
  Mm, although I felt that Rational Clearcase, MVS, and Visual Sourcesafe were mostly worse than CVS.
  - pjmlp 11y ago
    Given my experience on the enterprise, you can still use the present form. Although I do like gated checkins in TFS without having to roll our own solutions.

ajross 11y ago

SCCS was contemporary with early unix development, so certainly it's technically possible that there are revision histories going back that far. But I'd have to believe that the early commits in this repo are just release checkpoints. It looks like the most recent stuff (1994) dates from early proto-FreeBSD work.

autoreleasepool 11y ago

Here's the first "synthetic commit" from June 20, 1972 https://github.com/dspinellis/unix-history-repo/commit/6717481c358b484385b4f5d5b95205e2a924a2c7 https://github.com/dspinellis/unix-history-repo/commit/67174...

a_bonobo 11y ago
The accompanying publication explains it more: http://www.dmst.aueb.gr/dds/pubs/conf/2015-MSR-Unix-History/html/Spi15c.pdf http://www.dmst.aueb.gr/dds/pubs/conf/2015-MSR-Unix-History/... >Curating and processing available snapshots as well as old and modern configuration management repositories allows the reconstruction of a new synthetic Git repository that combines under a single roof most of the available data
bitcointicker 11y ago
Last page starts here: https://github.com/dspinellis/unix-history-repo/commits/master?page=3951 https://github.com/dspinellis/unix-history-repo/commits/mast... Fascinating!

cyphar 11y ago

Because Git wasn't the first version control system. Nor was it the first bringover-modify-merge model of distributed source control.