# Re: previous references 4 messages from 2009-10-04 to 2009-10-05. Participants: Daniele Segato, Sverre Rabbelier, Johan Herland, Octavian Râşniţă. Thread: https://gitlist.dev/t/21137 ## Octavian Râşniţă, 2009-10-04 08:31 Subject: previous references Message-ID: <8E72DAAF9F8E4024BB819F3F83CCFC79@teddy> URL: https://gitlist.dev/e/8E72DAAF9F8E4024BB819F3F83CCFC79%40teddy ``` Hi, Are the following commands specifying the same reference? prompt> git log -1 HEAD^^^ ... log entry ... prompt> git log -1 HEAD^~2 ... log entry ... prompt> git log -1 HEAD~1^^ ... log entry ... prompt> git log -1 HEAD~3 ... log entry ... Thank you. Octavian ``` ## Johan Herland, 2009-10-04 09:27 Subject: Re: previous references Message-ID: <200910041127.29588.johan@herland.net> URL: https://gitlist.dev/e/200910041127.29588.johan%40herland.net In-Reply-To: <8E72DAAF9F8E4024BB819F3F83CCFC79@teddy> ``` On Sunday 04 October 2009, Octavian Râşniţă wrote: > Are the following commands specifying the same reference? > > prompt> git log -1 HEAD^^^ ... log entry ... > prompt> git log -1 HEAD^~2 ... log entry ... > prompt> git log -1 HEAD~1^^ ... log entry ... > prompt> git log -1 HEAD~3 ... log entry ... Yes ...Johan -- Johan Herland, www.herland.net ``` ## Daniele Segato, 2009-10-05 21:11 Subject: Re: previous references Message-ID: <1254777067.26111.105.camel@localhost> URL: https://gitlist.dev/e/1254777067.26111.105.camel%40localhost In-Reply-To: <200910041127.29588.johan@herland.net> ``` Il giorno dom, 04/10/2009 alle 11.27 +0200, Johan Herland ha scritto: > On Sunday 04 October 2009, Octavian Râşniţă wrote: > > Are the following commands specifying the same reference? > > > > prompt> git log -1 HEAD^^^ ... log entry ... > > prompt> git log -1 HEAD^~2 ... log entry ... > > prompt> git log -1 HEAD~1^^ ... log entry ... > > prompt> git log -1 HEAD~3 ... log entry ... > > Yes the ~ is used to select the first parent of a commit and their grand-parents HEAD~ means the parent of the current head HEAD~2 means the grand-parent HEAD~3 the grand-grand-parent.. the ^ is used to select a direct parent of a commit HEAD^ is the same as HEAD~ HEAD^^ is the same as HEAD~2 (parent of the parent) HEAD^2 is NOT the same of HEAD~2, it means the "second parent" of HEAD: this make sense only if HEAD has at least two parents (because it is a merge commit) if it hasn't you'll get: fatal: ambiguous argument 'HEAD^2': unknown revision or path not in the working tree. Use '--' to separate paths from revisions you can read the same here: http://progit.org/book/ch6-1.html regards, Daniele ``` ## Sverre Rabbelier, 2009-10-05 21:20 Subject: Re: previous references Message-ID: URL: https://gitlist.dev/e/fabb9a1e0910051420q58bded6aqa9510b2cc77a1419%40mail.gmail.com In-Reply-To: <1254777067.26111.105.camel@localhost> ``` Heya, On Mon, Oct 5, 2009 at 23:11, Daniele Segato wrote: > fatal: ambiguous argument 'HEAD^2': unknown revision or path not in the > working tree. > Use '--' to separate paths from revisions Really? That's awful, shouldn't we at least say something about HEAD not having that many parents? -- Cheers, Sverre Rabbelier ```