gitk: Disable "Reset %s branch to here" when on a detached head
When we are on a detached head - since gitk does not display where we are - reset has no sense, so disable the relevant line on the context menu, and point out to the user that we are on a detached head. Otherwise, a reset from gitk when on a detached head returns the error: can't read "headids()": no such element in array can't read "headids()": no such element in array while executing "removehead $headids($name) $name" (procedure "movehead" line 4) invoked from within "movehead $newhead $mainhead" (procedure "readresetstat" line 20) invoked from within "readresetstat file4" ("eval" body line 1) invoked from within "eval $script" (procedure "dorunq" line 9) invoked from within "dorunq" ("after" script) [paulus@samba.org: changed menu item to "Detached head: can't reset"] Signed-off-by: NMichele Ballabio <barra_cuda@katamail.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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