{"thread":{"id":"51422","subject":"Submodule \"git branch\" says (HEAD detached at )","startedAt":"2019-07-03T08:29:37Z","lastAt":"2019-07-03T19:01:28Z","messageCount":4,"participants":["Julius Smith","Junio C Hamano"],"isPatch":false,"patchVersion":null,"patchTotal":null},"messages":[{"id":"378527","messageId":"CAMPRpjUWBXCEagDB5RwsBTYSJWeypOeY47CGWOO95oZiSCTOjw@mail.gmail.com","threadId":"51422","inReplyTo":null,"subject":"Submodule \"git branch\" says (HEAD detached at )","fromName":"Julius Smith","fromEmail":"jos@ccrma.stanford.edu","sentAt":"2019-07-03T08:28:59Z","receivedAt":"2019-07-03T08:29:37Z","isPatch":false,"sender":{"key":"jos@ccrma.stanford.edu","avatar":"https://gravatar.com/avatar/30f98fd10591be7b7108880f894d4f37f0d9cf3ca5ab18235386c923a20ee8cf?d=mp&s=160"},"body":"Greetings,\n\nI have a repo with two branches A and B, say, and a submodule pointing\nto a repo also with two branches, say C and D. Branch A of the parent\nuses branch C of the submodule, while B uses D. My clone is in a\nstate (that I've seen often) where branch A's submodule directory\n_appears_ to be using a commit for D when really it's a commit for C.\n\"git branch\" in the the submodule directory says \"(detached from\n)\" but this seems to be wrong. I did \"git diff\n\" in the submodule directory to show that it was the C-commit\nand not the D-commit as it appeared. Could \"git branch\" in the\nsubmodule directory be referring to the commit at the time it was\nfirst detached and not updating after a \"git submodule update --init\"\nin the parent?\n\nThanks,\n- Julius\n\n-- \nJulius O. Smith III \n"},{"id":"378528","messageId":"CAMPRpjUAKPo-fFeE1R_QjMTrc_RST0y-1Jrhcg2Z-xyH7ubt5A@mail.gmail.com","threadId":"51422","inReplyTo":"CAMPRpjUWBXCEagDB5RwsBTYSJWeypOeY47CGWOO95oZiSCTOjw@mail.gmail.com","subject":"Re: Submodule \"git branch\" says (HEAD detached at )","fromName":"Julius Smith","fromEmail":"jos@ccrma.stanford.edu","sentAt":"2019-07-03T08:31:40Z","receivedAt":"2019-07-03T08:32:18Z","isPatch":false,"sender":{"key":"jos@ccrma.stanford.edu","avatar":"https://gravatar.com/avatar/30f98fd10591be7b7108880f894d4f37f0d9cf3ca5ab18235386c923a20ee8cf?d=mp&s=160"},"body":"I should add:\n> git --version\ngit version 2.20.1 (Apple Git-117)\n\nOn Wed, Jul 3, 2019 at 1:28 AM Julius Smith wrote:\n>\n> Greetings,\n>\n> I have a repo with two branches A and B, say, and a submodule pointing\n> to a repo also with two branches, say C and D. Branch A of the parent\n> uses branch C of the submodule, while B uses D. My clone is in a\n> state (that I've seen often) where branch A's submodule directory\n> _appears_ to be using a commit for D when really it's a commit for C.\n> \"git branch\" in the the submodule directory says \"(detached from\n> )\" but this seems to be wrong. I did \"git diff\n> \" in the submodule directory to show that it was the C-commit\n> and not the D-commit as it appeared. Could \"git branch\" in the\n> submodule directory be referring to the commit at the time it was\n> first detached and not updating after a \"git submodule update --init\"\n> in the parent?\n>\n> Thanks,\n> - Julius\n>\n> --\n> Julius O. Smith III \n"},{"id":"378560","messageId":"xmqq7e8z0ypm.fsf@gitster-ct.c.googlers.com","threadId":"51422","inReplyTo":"CAMPRpjUWBXCEagDB5RwsBTYSJWeypOeY47CGWOO95oZiSCTOjw@mail.gmail.com","subject":"Re: Submodule \"git branch\" says (HEAD detached at )","fromName":"Junio C Hamano","fromEmail":"gitster@pobox.com","sentAt":"2019-07-03T18:17:41Z","receivedAt":"2019-07-03T18:17:46Z","isPatch":false,"sender":{"key":"gitster@pobox.com","avatar":"https://avatars.githubusercontent.com/u/54884?v=4"},"body":"Julius Smith writes:\n\n> \"git branch\" in the the submodule directory says \"(detached from\n> )\" but this seems to be wrong. I did \"git diff\n> \" in the submodule directory to show that it was the C-commit\n> and not the D-commit as it appeared. Could \"git branch\" in the\n> submodule directory be referring to the commit at the time it was\n> first detached and not updating after a \"git submodule update --init\"\n> in the parent?\n\nThere are \"detached from\" and \"detached at\" messages. Their use was\nsomewhat inconsistent in the older version of Git, but at least\nsince 2.4.0 (quoting from Documentation/RelNotes/2.4.0.txt):\n\n * The phrasing \"git branch\" uses to describe a detached HEAD has been\n updated to agree with the phrasing used by \"git status\":\n\n - When HEAD is at the same commit as when it was originally\n detached, they now both show \"detached at \".\n\n - When HEAD has moved since it was originally detached, they now\n both show \"detached from \".\n\n Previously, \"git branch\" always used \"from\".\n\n\"git branch\" and \"git status\" should be using the same language to\ndescribe the situation.\n"},{"id":"378567","messageId":"CAMPRpjULRpzG+Xf8Ezc2+-4cVB7phGs9h+7nxhx-GP44__mfeg@mail.gmail.com","threadId":"51422","inReplyTo":"xmqq7e8z0ypm.fsf@gitster-ct.c.googlers.com","subject":"Re: Submodule \"git branch\" says (HEAD detached at )","fromName":"Julius Smith","fromEmail":"jos@ccrma.stanford.edu","sentAt":"2019-07-03T19:00:49Z","receivedAt":"2019-07-03T19:01:28Z","isPatch":false,"sender":{"key":"jos@ccrma.stanford.edu","avatar":"https://gravatar.com/avatar/30f98fd10591be7b7108880f894d4f37f0d9cf3ca5ab18235386c923a20ee8cf?d=mp&s=160"},"body":"Thanks for the explanation. So then to find out the current commit of\nthe submodule, I should cd into the submodule directory and say \"git\nrev-parse HEAD\" or \"git log -n1\", etc.\n\nSuggestion: for a moved HEAD, it would be nice to show \"(detached from\n now at )\".\n\nThanks for considering, and thanks for a truly great software tool.\n\n- Julius\n\nOn Wed, Jul 3, 2019 at 11:17 AM Junio C Hamano wrote:\n>\n> Julius Smith writes:\n>\n> > \"git branch\" in the the submodule directory says \"(detached from\n> > )\" but this seems to be wrong. I did \"git diff\n> > \" in the submodule directory to show that it was the C-commit\n> > and not the D-commit as it appeared. Could \"git branch\" in the\n> > submodule directory be referring to the commit at the time it was\n> > first detached and not updating after a \"git submodule update --init\"\n> > in the parent?\n>\n> There are \"detached from\" and \"detached at\" messages. Their use was\n> somewhat inconsistent in the older version of Git, but at least\n> since 2.4.0 (quoting from Documentation/RelNotes/2.4.0.txt):\n>\n> * The phrasing \"git branch\" uses to describe a detached HEAD has been\n> updated to agree with the phrasing used by \"git status\":\n>\n> - When HEAD is at the same commit as when it was originally\n> detached, they now both show \"detached at \".\n>\n> - When HEAD has moved since it was originally detached, they now\n> both show \"detached from \".\n>\n> Previously, \"git branch\" always used \"from\".\n>\n> \"git branch\" and \"git status\" should be using the same language to\n> describe the situation.\n>\n>\n\n\n-- \n\nJulius O. Smith III \nProfessor of Music and, by courtesy, Electrical Engineering\nCCRMA, Stanford University\nhttp://ccrma.stanford.edu/~jos/\n"}]}