gitk: Show detached HEAD if --all is specified
If HEAD is detached, 'gitk --all' does not show it. This is inconvenient for frontend program, and for example git log does show the detached HEAD. gitk uses git rev-parse to find a list of branches to show. Apparently, the command does not include detached HEAD to output if --all argument is specified. This has been discussed in [1] and stated as expected behavior. So rev-parse's parameters should be tuned in gitk. [1] http://thread.gmane.org/gmane.comp.version-control.git/255996Signed-off-by: NMax Kirillov <max@max630.net> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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