Recreate complete history for all languages

[ckuethe]

You might want to check out similar repos - history has been reconstructed from older versions of the software, eg. https://github.com/rirze/sgp4-cpp

[astrojuanlu]

Thanks for the idea @ckuethe! With a little bit of patience and help from web.archive.org we could do the same thing here, for all languages (and not only the ones I cared about when I created this repo).

[ckuethe]

I have already retrieved historical versions... https://drive.google.com/open?id=1L_PFk6dUDk4G5fPMoMb7C1CBbDTwX1P0

[astrojuanlu]

That's super helpful 😍 I'll put it into the repository tomorrow!

[ckuethe]

Tagging @interplanetarychris @brandon-rhodes @rirze @cbassa because they would probably also be interested in this based on their participation with skyfield and python-sgp4

[rirze]

@Juanlu001 Seems like this repository is aiming to be more complete wrt to Vallado's work implemented in many languages. I'm willing to merge/retire my mirror (rirze/sgp4-cpp) if you end up recreating the c++ history.

Just let me know either way.

[ckuethe]

I definitely like the way you synthesized authors and timestamps.

[rirze]

@ckuethe Thanks. It was a bit of effort to figure out how to do it at first.

In case you want to do it the same way I did @Juanlu001, here's the command I used:

THE_TIME=$(stat -c %y $(find cpp/ -type f -printf "%T@ %p\n" | sort -n | sed -r "s/^[0-9.]+\s+//" | tail -n 1 | xargs -I{} ls "{}")) GIT_AUTHOR_DATE=$THE_TIME GIT_COMMITTER_DATE=$THE_TIME git commit -a --author="David A. Vallado <[email protected]>"

There's a lot of logic to find the latest file timestamp, but other than that, iterating through the historical versions after deleting the old one was all there was to it.

[astrojuanlu]

I see that there are a lot of repositories that try to do this, but none of them has the full, proper commit history as we would like. I will try to tackle this during the summer.

[rirze]

@astrojuanlu Could you expand on what that includes? Where are other approaches or repositories lacking?

[astrojuanlu]

Sorry for the delay - I've seen countless repositories that copy paste Vallado software from the website, but what we would like to do here is to rebuild a sort of "commit history" using the updates and the changelogs from the source itself, so we can also see differences between versions. GitHub <[email protected]> wrote: “ @astrojuanlu Could you expand on what that includes? Where are other approaches or repositories lacking? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.”

[astrojuanlu]

Sorry @rirze, the other day I responded too quickly and didn't realize we had already spoken in this same thread last year :) It's been a tough winter.

Okay, so the two things I would like to have is:

• Commit with date per file. If I understand correctly, @rirze command in Recreate complete history for all languages #1 (comment) summarizes the commit using the most recent change per changeset.
• All languages. As mentioned, @rirze repository focus on C++.

I'm working on this as part of the SciPy US 2020 sprints, hope to get at least a prototype working.

[automaticjack1]

@ckuethe, @rirze, I have two files from the 2004 era which might be of use for C++ and FORTRAN tests. Their content listings follow. Would these help, and if so, how do I get them to you?

Archive: sgp4c.zip
Length Date Time Name

---

17293  08-09-2004 14:47   SGP4EXT.CPP
 5760  10-07-2004 09:51   SGP4TEST.CPP
86783  08-10-2004 09:37   SGP4UNIT.CPP
 2905  08-09-2004 14:47   SGP4EXT.H
 5607  08-10-2004 07:58   SGP4UNIT.H
13896  07-08-2004 12:56   SGP4-ALL.ELM

359608 07-22-2004 09:30 SGP4TEST.TXT
359608 10-07-2004 09:52 SGP4TEST.OUT

---

851460 8 files

Archive: fortran-data.zip
Length Date Time Name

---

14787  05-17-2000 12:19   NUT85.DAT
34933  11-01-2000 13:15   NUTATION.DAT
  812  10-06-1997 18:29   ATMOSEXP.DAT
33521  04-03-2003 09:34   TESTASTF.DAT

101257 04-03-2003 07:10 TESTASTF.TXT
15075 04-28-1999 13:59 GEOS1.TXT
69216 01-19-2000 13:17 SENSOR.TXT
17254 04-28-1999 14:00 GEOS2.TXT
15075 04-28-1999 14:00 GEOS5.TXT
1694 06-17-1999 12:00 GEOS2.IN
1476 04-22-1999 14:12 GEOS1.IN
2048 04-22-1999 14:12 GEOS5.IN
7834 10-06-1999 15:33 SGP4-ALL.ELM
5282 09-22-1998 10:06 Y2K.ELM
294 09-27-2001 12:43 16609D.ELM
183 10-06-1998 09:24 20510.ELM

---

320741 16 files