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From: Patrick Lehmann <>
To: Stefan Beller <>
Cc: Lars Schneider <>, Git Mailinglist <>
Subject: AW: Restoring detached HEADs after Git operations
Date: Mon, 19 Jun 2017 18:09:21 +0000
Message-ID: <> (raw)
In-Reply-To: <>

Hello Stefan,

the use case is as follows:

The projects consists of circa 18 IP cores. Each IP core is represented by a Git repository. Think of an IP core as of a lonestanding DLL or SO file project. Each IP core references 2 submodules, which bring the verification environments for testing the IP core standalone.

These 18 IP cores are grouped to bigger IP cores, referencing the low-level IP cores and each again the 2 verification submodules. Finally, the main project references the bigger IP cores and again the 2 verification cores.

  o- IP1
       o- UVVM
       o- VUnit
  o- IP2
       o- UVVM
       o- VUnit
  o- IP3
       o- UVVM
       o- VUnit
  o- IP4
       o- UVVM
       o- VUnit
       o- IP5
           o- UVVM
           o- VUnit
       o- IP6
           o- UVVM
           o- VUnit
       o- IP7
           o- UVVM
           o- VUnit
  o- IP8
       o- UVVM
       o- VUnit
       o- IP9
           o- UVVM
           o- VUnit
       o- IP10
           o- UVVM
           o- VUnit
  o- IP11
       o- UVVM
       o- VUnit
       o- IP9
           o- UVVM
           o- VUnit
       o- IP12
           o- UVVM
           o- VUnit
   o- UVVM
   o- VUnit

That's the simplified structure. I can't write more, because it's a closed source project. You can find other usecases e.g. in my other open source projects. E.g. The PoC-Library or The PicoBlaze-Library and the corresponding PoC-Examples repository.

Example: PoC
Pile of Cores includes 4 Git submodules and is itself an IP core library.
So PoC-Examples again references PoC. This looks like this tree:

  |- lib/
       o- PoC
            |- lib
                o- Cocotb
                o- OSVVM
                o- VUnit
                     o- .... OSVVM
                o- UVVM

The library VUnit itself already includes OSVVM as a library.

I'll write a new question / idea about multiple equal submodules and the memory footprint soon...
Here is my original question posted on StackOverflow:

Do you need more use cases?

Kind regards
Von: []&quot; im Auftrag von &quot;Stefan Beller []
Gesendet: Montag, 19. Juni 2017 19:47
Bis: Patrick Lehmann
Cc: Lars Schneider; Git Mailinglist
Betreff: Re: Restoring detached HEADs after Git operations

On Mon, Jun 19, 2017 at 10:34 AM, Patrick Lehmann
<> wrote:
> Hello,
> I'm just an advanced Git user, not a Git developer. So I might find some time to improve the suggested script, which I provided with the hints given on the mailing list, but I have no time to do a complete feature release in your patch based Git flow.

ok, thanks for letting us know. I may re-prioritize the "reattach
HEAD" patches that I referenced earlier.
I would have hoped that additionally to the shell lines you'd have
given a good use case/summary.

> I have no experience with other shells then Bash. So if you rely on a Bash with less features, please port the syntax to such a shell system. (I personally do not support legacy programs or out-date programs).
> ------
> We are talking about circa 50 submodules in total with a maximum depth of 4. The platforms are:
> - Mint OS with Git in Bash
> - Windows 7 with Git-Bash
> - Windows 10 with Git-Bash
> - Windows 10 with Posh-Git


  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-19  8:46 Patrick Lehmann
2017-06-19  9:30 ` Lars Schneider
2017-06-19  9:52   ` AW: " Patrick Lehmann
2017-06-19 16:37     ` Stefan Beller
2017-06-19 17:34       ` AW: " Patrick Lehmann
2017-06-19 17:47         ` Stefan Beller
2017-06-19 18:09           ` Patrick Lehmann [this message]
2017-06-19 19:21             ` Stefan Beller
2017-06-19 20:13               ` AW: " Patrick Lehmann
2017-06-19 17:55       ` Junio C Hamano
2017-06-19 19:11         ` Stefan Beller
2017-06-19 16:31 ` Stefan Beller
2017-06-19 17:01 ` Jeff King
2017-06-19 17:56 ` Ævar Arnfjörð Bjarmason

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