From: Junio C Hamano <email@example.com> To: Stefan Beller <firstname.lastname@example.org> Cc: Patrick Lehmann <Patrick.Lehmann@plc2.de>, Lars Schneider <email@example.com>, Git Mailinglist <firstname.lastname@example.org> Subject: Re: Restoring detached HEADs after Git operations Date: Mon, 19 Jun 2017 10:55:07 -0700 Message-ID: <email@example.com> (raw) In-Reply-To: <CAGZ79kY0gwk7KRY2iAVTXPBjPzx+mkciVWRR2z2cDgiBjQ2uuw@mail.gmail.com> Stefan Beller <firstname.lastname@example.org> writes: > On Mon, Jun 19, 2017 at 2:52 AM, Patrick Lehmann > <Patrick.Lehmann@plc2.de> wrote: >> Hello Lars, >> >> for your questions: >>> If there are multiple branches with the same hash then your script would pick the first one. Can you imagine a situation where this would be a problem? >> >> I can't think of a good solution to resolve it automatically. Maybe a script could print that there are multiple possibilities and it choose the first branch in the list. >> >> >>> Plus, you are looking only at local branches. Wouldn't it make sense to look at remote branches, too? >> >> This is also related to restoring tags. If we go this way, we should have this priority list: >> - local branches >> - remote branches > > For remote branches you would create a local branch of the same name > (if such a branch would not exist, possibly setting it up to track that remote > branch)? > >> - tags > > as said in the other email and similar to remote branches, we'd not want to have > HEAD pointing to them directly but somehow have a local branch. Let's step back a bit. We detach the HEAD for a good reason, no? Why is it a good idea to move them back on to a branch picked among multiple ones that all happen to be pointing at the same commit? The user may build on a history of a submodule, and then may push the result out to a particular branch at the other side; that is when being on a named branch in the submodule becomes useful, but even then I do not think randomly picking one branch and be on it is a good thing to do. I would understand the workflow would go more like so: - You do something at the superproject (e.g. create a new branch X from an existing commit and check it out), which results in submodules' HEADs getting detached at the commits bound to the superproject's tree. - Because you want to make changes to both submodules and the superproject in a consistent way, you'd want to commit changes to all of these repositories and the push the result out in an atomic way. - Hence you tell "Hey, Git, I want all the submodules that I modified to be on branch X" from the superproject. - This may succeed in a submodule where X is a new name, or the current tip of branch X is an ancestor of the detached HEAD. - This may fail in a submodule where there is branch X that does not want to move to the detached HEAD's state. In this latter case, the user needs to deal with the situation (perhaps the old X is expendable; perhaps the HEAD's commit may need to be merged to old X; perhaps there are other cases). though.
next prev parent reply index Thread overview: 14+ messages in thread (expand / 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 ` AW: " Patrick Lehmann 2017-06-19 19:21 ` Stefan Beller 2017-06-19 20:13 ` AW: " Patrick Lehmann 2017-06-19 17:55 ` Junio C Hamano [this message] 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
Reply instructions: You may reply publically to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style List information: http://vger.kernel.org/majordomo-info.html * Reply to all the recipients using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --email@example.com \ --firstname.lastname@example.org \ --cc=Patrick.Lehmann@plc2.de \ --email@example.com \ --firstname.lastname@example.org \ --email@example.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
firstname.lastname@example.org mailing list mirror (one of many) Archives are clonable: git clone --mirror https://public-inbox.org/git git clone --mirror http://ou63pmih66umazou.onion/git git clone --mirror http://czquwvybam4bgbro.onion/git git clone --mirror http://hjrcffqmbrq6wope.onion/git Newsgroups are available over NNTP: nntp://news.public-inbox.org/inbox.comp.version-control.git nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git nntp://news.gmane.org/gmane.comp.version-control.git note: .onion URLs require Tor: https://www.torproject.org/ or Tor2web: https://www.tor2web.org/ AGPL code for this site: git clone https://public-inbox.org/ public-inbox