# Missing documentation for GIT_DIFF_OPTS and GIT_EXTERNAL_DIFF 2 messages from 2007-02-13 to 2007-02-14. Participants: Yann Dirson, Jakub Narebski. Thread: https://gitlist.dev/t/6809 ## Yann Dirson, 2007-02-13 22:36 Subject: Missing documentation for GIT_DIFF_OPTS and GIT_EXTERNAL_DIFF Message-ID: <20070213223657.GC4266@nan92-1-81-57-214-146.fbx.proxad.net> URL: https://gitlist.dev/e/20070213223657.GC4266%40nan92-1-81-57-214-146.fbx.proxad.net ``` I noticed today, after unsuccessfully trying GIT_DIFF_OPTS=-U2, that 1) it did not work, 2) the doc in 1.4.4.4 tells about using "GIT_DIFF_OPTS=-c", which does not work either and 3) there is virtually no more doc about it in HEAD. It would be useful to document which flags are recognized, and notably that -u has to be used instead of GNU diff's -U. At the same time, I noticed that GIT_EXTERNAL_DIFF is not described in the diff docs either, although it is described in the main git.txt page (which may not be the place where users would look for it - at least, only my grep aiming to be accurate before composing this mail finally found it). Best regards, -- Yann. ``` ## Jakub Narebski, 2007-02-14 01:27 Subject: Re: Missing documentation for GIT_DIFF_OPTS and GIT_EXTERNAL_DIFF Message-ID: URL: https://gitlist.dev/e/eqtof8%248id%241%40sea.gmane.org In-Reply-To: <20070213223657.GC4266@nan92-1-81-57-214-146.fbx.proxad.net> ``` Yann Dirson wrote: > I noticed today, after unsuccessfully trying GIT_DIFF_OPTS=-U2, that > 1) it did not work, 2) the doc in 1.4.4.4 tells about using > "GIT_DIFF_OPTS=-c", which does not work either and 3) there is > virtually no more doc about it in HEAD. > > It would be useful to document which flags are recognized, and notably > that -u has to be used instead of GNU diff's -U. > > At the same time, I noticed that GIT_EXTERNAL_DIFF is not described in > the diff docs either, although it is described in the main git.txt > page (which may not be the place where users would look for it - at > least, only my grep aiming to be accurate before composing this mail > finally found it). GIT_DIFF_OPTS are also described there. -- Jakub Narebski Warsaw, Poland ShadeHawk on #git ```